Availability Of Raw Materials Research Articles

(Invited) Recovery Of Silver And Silicon From EoL PV Modules

Photovoltaic modules global expansion has been dynamic over the last 20 years and is on the verge of becoming massive with the necessary ongoing energy transition. This development raises legitimate concerns of i) raw materials availability and ii) handling of modules as a waste after their decommissioning. End of Life (EoL) modules are indeed a powerful source of critical raw materials that worth being fully exploited and optimized to reduce the demand on natural resources and energy (>50MWh/t of PC-Si) to produce fresh modules whilst addressing the matter of wastes. We shall know that 6 tons of natural resources are needed to produce one ton of PV-grade Si, and the share of critical material Ag for PV production accounts already for more than 13% of global consumption. However, EoL module recycling has been poorly developed so far, mostly because of the difficult delamination stage necessary to release precious metals and Silicon. Different approaches, involving shredding, machining, solvents, flashing light have been investigated by different institutes or companies to delaminate the module structure and recycle metals, but none of them successfully demonstrated the recovery at large scale, suffering from a lack of purity, efficiency or scalability. In this context, ROSI developed an innovative route coupling different key steps to produce Silver and Silicon at industrial scale by recycling EoL modules. In order to address the varsity of polymer structures in PV panels, a thermal process based on pyrolysis ensures a generic approach of delamination to convert 100% of polymers into gas, thus releasing cell fragments. A mild chemical etching step then achieves the full separation of Silver fingers from the surface of Silicon, avoiding the use of harsh chemicals generally used in the recovery of metals from electronic wastes. A dedicated sortation process finally allows to recover high purity glass, copper, Silicon and Silver as depicted in Figure 1.Based on the thermal behaviour of different mixes of polymers, pyrolysis process has been optimized to ensure the full conversion of polymers in gas whilst limiting thermal budget regardless of the initial composition of the PV module. This optimization phase will be presented and coupled with the mild wet etching technology developed to obtain silver fingers. Characterizations of recoveredmaterials will be presented, together with their high value applications. Figure 1

Realization High-Voltage Stabilization of O3-Type Layered Oxide Cathodes for Sodium-Ion Batteries by Sn Simultaneously Dual Modification

The total global production of lithium-ion batteries (LIBs) used in electric vehicles and stationary energy storage devices has increased sharply to reach the targeted Net Zero by 2050. This leads to concerns about the future and long-term availability and cost of critical raw materials (cobalt, nickel, lithium and copper) employed in LIBs. Therefore, alternative new-generation batteries with comparable performance but using less critical raw materials are needed.Sodium-ion Batteries (NIBs) offer a wealth of possibilities for inexpensive and sustainable energy storage devices. To maximize their potential, new cathode materials with high energy densities and stable structures are required. Cobalt-free sodium transition metal oxides of O3 type are a predominant cathode for NIBs due to their appreciable specific capacity, reduction in the use of critical elements, and the potential to rival LiFePO4 in terms of energy density. However, rapid capacity fading caused by serious structural and interfacial degradation hamper this process.Herein, we provide a novel Sn-modified O3-type NaNi1/3Fe1/3Mn1/3O2 cathode with improved high-voltage stability by bulk Sn doping and surface coating simultaneously. The bulk substitution of Sn4+ stabilizes the crystal structure by alleviating the irreversible high voltage phase transition and lattice structure degradation. In the meantime, the spontaneously formed tin rich surface layer effectively inhibits surface parasitic reactions and improves interfacial stability during cycling. As a result, the Sn-modified NaNi1/3Fe1/3Mn1/3O2 cathode exhibited excellent cycling performance by an almost doubled capacity retention increase after 200 cycles within 2.0-4.1V. The influence of Sn modification on the crystal structure and electrochemical properties has been investigated for the first time, and the mechanism was studied through an extensive analysis by in situ XRD, HRTEM, FIB-SEM, XPS and Mössbauer spectroscopy.This work offers an industrially feasible strategy to simultaneously stabilize the bulk structure and interface for O3-type layered cathodes for SIBs and raises the possibility of similar effective strategies to be employed for other energy storage materials Figure 1

Doped Nasicon-Type Solid Electrolytes for Sodium-Ion Batteries from Scalable Spray-Flame Synthesis

Due to the limited availability of raw materials, sodium-ion batteries (SiB) are a viable alternative to lithium-ion batteries. However, liquid-electrolyte-based SiBs have a comparably low energy density and suffer from safety issues similar to their lithium-ion-based counterparts. To address these issues, solid-state SiBs are a promising option and sodium super ionic conductors (NaSICON) are suitable solid electrolytes for such systems. They exhibit good mechanical properties and chemical stability, high ionic conductivity and compatibility with sodium metal based anodes enabling high energy density [1]. One of the best studied NaSICON materials is Na3Zr2Si2PO12 (NZSP) with a high ionic conductivity in the order of 10-4 –10-3 S·cm-1 at room temperature [2]. Conventional synthesis methods of this class of materials such as solid-state reaction and liquid-phase synthesis have several drawbacks due to time-consuming process steps such as milling, high temperature sintering, precipitation, washing and drying steps to obtain the final product.We present spray flame synthesis (SFS) as a new approach for the synthesis of nanosized NaSICON materials. Recent studies have shown that sintering of nanoparticular NZSP precursors offers several advantages: A high specific surface area, which increases the sintering activity, and short atomic diffusion paths, allowing high homogeneity and phase purity to be achieved at comparatively low sintering temperatures [3]. In SFS, metal salts dissolved in organic solvents are combusted resulting in fine metal oxide particles. They are characterized by transmission electron microscopy (TEM), X-Ray diffraction (XRD) and Raman-Spectroscopy for structural and morphological investigation. Elemental information is obtained via energy-dispersive X-Ray spectroscopy (EDX). Ionic conductivities of sintered NZSP pellets are measured by impedance spectroscopy.In our approach, nanoparticles with a median diameter of around 5–9 nm are obtained. The pristine particles consist of crystalline ZrO2, homogeneously covered with an amorphous layer consisting of the elements Na, Si, P and O. After a short annealing step for 1h at 1000°C, this mixture can be converted almost quantitatively into the desired rhombohedral NZSP phase. Moreover, aliovalent dopants were successfully added for the synthesis of Na3+2xAxZr2−xSi2PO12 with A = Mg or Ca. Pressed pellets sintered at 1100°C for 3h to a relative density of ~92% showed - for a material sintered for such a short period of time - a surprisingly high ionic conductivity of up to 7.9×10-4 S·cm-1 (Mg-doped).In conclusion, a novel approach for the preparation of NZSP allowing the phase formation at relatively low temperatures is demonstrated. Spray flame synthesis is an elegant and promising possibility for the scalable production of solid electrolytes, which also holds great potential, especially with regard to further improvement of ionic conductivity through targeted doping.[1] Zhang et al., ACS Appl. Energy Mater., 3 (2020) 7427; doi.org/10.1021/acsaem.0c00820[2] Narayanan et al., Solid State Ion., 331 (2019), 22; doi.org/10.1016/j.ssi.2018.12.003[3] Jalalian-Khakshour et al. J.Mater.Sci., 55, (2019) 2291; doi.org/10.1007/s10853-019-04162-8

Tin Nanoparticles As High-Performance Anode for Sodium-Based Batteries: Preparation and Operando XRD Investigation

Lithium-ion batteries (LIBs) have been dominating the energy storage market for decades, but the political and economic issues related to raw materials availability and cost is fueling the search for new electrochemical solutions. Sodium-based batteries (SBBs) are the most promising substitute to LIBs, because the similar physico-chemical properties of these two alkali guarantees the knowledge transfer from LIBs to SBBs and facilitate the working phenomena comprehension (so called rocking-chair mechanism).The materials used as cathodes in LIBs often have a sodium-based analogue that offers acceptable performances in SBBs, yet this is not the case for anode materials. Graphite is the most used material as anode in LIBs and its electrochemical behaviour with lithium is based on the intercalation mechanism. Unfortunately, Na does not intercalate into graphite, pushing scientists to find other solutions, such as hard/soft carbons and alloying elements [1]. Tin, in particular, has a high theoretical capacity (847 mAh/g) due to the formation of the high-sodium-content alloy Na15Sn4, making it a promising candidate for the next generation of SBBs [2].In our work tin nanoparticles and tin/carbon composites are prepared and analysed through electrochemical techniques. Being the sodiation of tin an alloying reaction, during the half cells discharge the increasing of sodium amount in tin is observed as the formation of high-sodium-content alloys according to the related phase diagram. We investigated the evolution of the system by operando XRD carried out at low current rate (coulometric titration), to confirm the expected phases based on the phase diagram are indeed observed. The results are corroborated by the electrochemical tests (galvanostatic cycling and voltammetry). Experimental data and theoretical information from literature are used to identify crystalline and amorphous phases [3]. The main issue linked to alloying materials is the high-volume expansion after discharge (420 % for tin), leading to fast capacity fade because of the solid electrolyte interphase (SEI) continuous destruction. For this reason, we prepared Sn/carbon composite structures able to mitigate the expansion and avoid the tin aggregation. In this way the capacity retention is improved, making this material a valid alternative for next generation batteries.

An agent-based heuristics optimisation model for production scheduling of make-to-stock connector plates manufacturing systems

The manufacturing systems’ success directly relates to their accurate, reliable and flexible schedules, including how production is planned and scheduled and which constraints are considered in generating the schedules. The study's objective arises from the need to generate an optimal production scheduling system in a connecting plates manufacturing company that works on a Make-To-Stock basis. This research investigates the impact of demand and operational constraints on production schedules, including the facility capacity, operators and machines availability, raw materials availability, inventory level and warehouse capacity. A multi-agent-based optimisation model is developed to face the complexity of considering demand and operational constraints and reflects their impact on generating a reliable production schedule. This model involves a proposed heuristic algorithm that considers demand and operations constraints in such a manufacturing environment and optimises the production schedule based on these restrictions/requirements. A real-life case study based on a connecting plates manufacturer company is used as a test bench of the proposed agent-based heuristic optimisation model. The proposed algorithm is compared with other related approaches to check its superiority based on key criteria, including inventory levels, missed/unsatisfied orders and total production time. Results show that the proposed heuristics algorithm reduced the number of missed orders by 34% compared with similar approaches.

Magnetic Laser Radiation Use for the Technological Characteristics Optimization of Raw Milk

The high-quality raw materials availability in Russia today is the main determining factor in the dairy market development. High bacterial contamination leads to a deterioration in taste, a decrease in the nutritional value of raw milk and products made from it, and also contributes to a significant reduction in its shelf life. The research aims at the magnetic laser exposure use to raw milk to optimize its technological characteristics. Depending on the power, radiation frequency and exposure time, a man run the experiment with raw milk selected from one batch of cows in the Federal State Unitary Enterprise “Streletskoe” of the Russian Agricultural Academy of the Oryol district of the Oryol region, in comparison with raw milk pasteurized at a temperature of (76 ± 2) °C for 20 sec. The researchers used the device “Mustang 1” (model 017) with and without a magnetic laser nozzle MLO-1 as a magnetic laser emitter. They studied the laser exposure impact on the organoleptic, physico-chemical and microbiological parameters of raw milk in order to create conditions for the high-quality, competitive fermented milk products manufacture. The magnetic laser radiation reduces the titratable acidity of raw milk by 1–2 °T, enabling an increase in the milk grade from the second to the first one and an extension of the bactericidal phase in compliance with organoleptic parameters. The authors adjusted the optimal mode of processing raw milk using magnetic laser radiation: power – 80 W, radiation frequency – 3000 Hz, exposure – 256 sec.

Planning abilities of wild chimpanzees (Pan troglodytes troglodytes) in tool-using contexts

AbstractPlanning is a type of problem solving in which a course of future action is devised via mental computation. Potential advantages of planning for tool use include reduced effort to gather tools, closer alignment to an efficient tool design, and increased foraging efficiency. Chimpanzees (Pan troglodytes troglodytes) in the Goualougo Triangle use a variety of different types of tools. We hypothesized that procurement strategy (brought to the termite nest, manufactured or acquired at the termite nest, or borrowed from others) reflects planning for current needs, with tool transport behavior varying by tool type and by age and sex class. It is also possible that chimpanzees anticipate the need for tools at future times, which would be evidenced by transporting multiple tool types for a sequential task. One year of video recordings at termite nests were systematically screened for tool procurement; data comprised 299 tool procurement events across 66 chimpanzees. In addition, we screened video recordings of leaf sponging and honey gathering, which resulted in another 38 procurement events. Fishing probes, which are typically used during a single visit, were typically transported to termite nests, while puncturing tools, which are durable and remain on site, were more often acquired at termite nests. Most tools transported in multiples were fishing probes, perhaps in anticipation that a single probe might not last through an entire foraging bout or might be transferred to another chimpanzee. We further documented that chimpanzees transported tool sets, comprising multiple different tool types used in sequence. Mature chimpanzees transported tools more often than did immatures. These observations suggest that chimpanzees plan tool use flexibly, reflecting the availability of raw materials and the likelihood that specific tool types will be needed for particular tasks. Developmental studies and further integration of behavioral, spatial, and archaeological data will help to illuminate the decision making and time depth of planning associated with tool technologies in living primates and hominin ancestors.

Algorithmic model generation for multi-site multi-period planning of clean processes by P-graphs

Optimal clean process design requires strict constraints to enforce waste and byproduct management, all of which can be formulated in the language of mathematical programming. However, waste management and the utilization of by-products are often carried out in locations or periods other than the production process. The paper describes all modeling steps by P-graphs sufficient to represent raw material availability and production capacities in multiple time periods at multiple sites, as well as transportation and storage capacities of process materials and wastes. These steps are integrated into a single comprehensive model generation algorithm. For easier understanding, each model generation step is illustrated by a case study of planning a multi-site multi-period furniture production process alongside the recent challenges of energy supply and waste management. Finally, the case study of furniture production is analyzed under various circumstances to highlight the power of the proposed tools in daily production and transportation planning. Accordingly, the proposed method provides such alternative 5 best manufacturing and logistics plans that, in the event of a complete failure or overloading of one of the production capacities at either locations, there is still an alternative plan within a 3% profit decrease.

Pemanfaatan Ubi Singkong untuk Membuat Jenis Kue Sebagai Penunjang Ekonomi di Masyarakat Desa Batuhoring,Kec.Batuhoring

The utilization of cassava in cake production has become a significant innovation in addressing economic challenges in Batuhoring Village, Batang Toru Subdistrict. Cassava, as an abundant crop in the area, offers significant economic potential. This research explores the potential of cassava in cake production, identifies challenges in management, and formulates promotional and marketing strategies for cassava-based cake products. The results indicate that cassava has a stable raw material availability, high nutritional value, and a variety of processed cake products. Challenges involve the complexity of management and the need for strong marketing. Marketing strategies involve social media and exhibitions, emphasizing competitive pricing and understanding consumer targets. The utilization of cassava in cake production is expected to increase community economic income, support the agricultural sector, and create blessings through biblical values of hard work, sharing, and wise natural resource management.

ANALYSIS OF RESEARCH ON THE PRODUCTION OF CARBON NANOPARTICLES AND THEIR APPLICATION IN TRIBOLOGY SYSTEMS

The article analyzes research on the production of carbon nanoparticles and their use in tribological systems. A comparison of the results of installations based on different methods of obtaining nanotubes and fullerenes shows that the purest and highest-quality product is obtained by laser evaporation of graphite, but this is a long, time-consuming and expensive process. The yield of useful products is up to 20 %. The thermal method has its advantages and disadvantages. The advantages include the availability and cheapness of carbon raw materials: from oil, carbon gases to municipal waste. All of them are sources of nanotubes and fullerenes when using the thermal method. The yield of useful nanoproducts is average, and the purity reaches 90-95 %. The simplest known method is the electric arc method for obtaining nanotubes and fullerenes. However, the yield of useful products does not exceed 15%. In addition, the large number of reactor designs for obtaining highly structured carbon nanoparticles indicates that an acceptable design has not yet been found that would guarantee obtaining a product with specified properties, stable parameters and in the required quantities. The article also analyzes research on the effect of carbon nanoparticles on the lubricating film, provides a calculation scheme for the interaction of a carbon nanoparticle with a metal surface in a friction pair, and provides a calculation model for the change in the adsorption time of carbon nanoparticles depending on the radius to the initial distance. Which showed that according to the experimental data of other researchers, the data obtained regarding the time of physical adsorption of individual molecules and their aggregates is about 10-9 to 10-6 seconds, which confirms the priority of the formation of the solvate shell, and only then the manifestation of the adsorption of carbon nanoparticles. The analysis of studies on the influence of carbon nanoparticles showed that there is a dependence for determining the intensity of wear of sliding friction pairs in elastic contact, which takes into account the concentration of carbon nanoparticles in the oil and the contact pressure. According to the obtained dependence, the intensity of wear is inversely proportional to the concentration of carbon nanoparticles, and directly proportional to the contact pressure.

Modifikasi Metode Big-M dan Analisis Sensitivitasnya untuk Optimasi Produksi Usaha Kecil Menengah

UKM (Small and Medium Enterprises) X is a business that produces various types of peanut brittle. Rempeyek is suitable as a snack and is popular with children and adults. The production process of UKM X is related to the quantity of demand and availability of raw materials. Therefore, optimal production planning is needed for UKM X to meet customer demand and obtain maximum profits. The problem of production is modeled into linear programming with the method used, namely, the method of Big M. The Big-M method is used because, on the function of the barrier on the production target, there is an equation , so artificial variables must be added to its solution. In this study, a modification of the Big-M method is made, and at the completion stage, it uses iteration with the determinant algorithm of the order of two matrices. The calculation results obtained the maximum profit of UKM X in a week of Rs5.455.775 by producing 56 kg of peanuts, 20 kg of seeds, 16 kg of spinach, 23 kg of tempe, and 60 kg of shrimp to meet customer requirements and utilize the availability of raw materials. Subsequently, sensitivity analysis is performed on the target function coefficient and the right street constants of the barrier to determine how the change affects the optimal solution. The results show that the solution remains optimal when profits are in the interval obtained, but the maximum profit value changes with constant production. Based on the calculation results, raw material supplies remain optimal when the change value is within the interval obtained.

The Effect of Fermentation Lemna (Leman minor) Powder Raw Material for Feed Growth Rate, Feed Efficiency and Survival Rate of Red Tilapia (Oreochromis niloticus)

Feed is an important component in fish farming. The availability of local raw materials as an alternative material for making feed is very important to replace flour which is expensive. one of them is by utilizing fermented lemna flour as the main ingredient in making vegetable feed. With the fermentation process in raw materials, it can increase digestibility, storage capacity and increase the nutritional value of food and break down indigestible materials such as cellulose and hemicellulose into simple sugars. This study aims to determine the growth rate, efficiency of use of apakn and survival rate for red tilapia by feeding fermented lemna flour. The fish used in this research is red tilapia with a size of 3-5 cm and kept for 30 days. Ad libitum feeding. Treatment of fermented lemna flour consisted of 3 treatments : treatment A (without fermented lemna flour), B (fermented lemna flour 5%) and C (fermented lemna flour 10%). The data observed were growth rate (RGR), feed efficiency (EPP) and survival rate. The results showed that treatment C gave the best average value at RGR of 0.00677% / day, EPP of 0.00682% and survival rate of 100%.

Recent Advances in Bromine Complexing Agents for Zinc–Bromine Redox Flow Batteries

The development of energy storage systems (ESS) has become an important area of research due to the need to replace the use of fossil fuels with clean energy. Redox flow batteries (RFBs) provide interesting features, such as the ability to separate the power and battery capacity. This is because the electrolyte tank is located outside the electrochemical cell. Consequently, it is possible to design each battery according to different needs. In this context, zinc–bromine flow batteries (ZBFBs) have shown suitable properties such as raw material availability and low battery cost. To avoid the corrosion and toxicity caused by the free bromine (Br2) generated during the charging process, it is necessary to use bromine complexing agents (BCAs) capable of creating complexes. As an overview, the different BCAs used have been listed to compare their behavior when used in electrolytes in ZBFBs. In addition, the coulombic and energy efficiencies obtained have been compared.

Prelimenary Study Technology Readiness Level and Techno-economic Analysis of Seaweed-Based Soft Capsule Prototypes

Product downstream to be marketable can be seen from the technological and techno-economic readiness level. This research aims to determine the level of technological and techno-economic readiness of the seaweed soft capsule prototype. The method used is to determine TRL (Technology Readiness Level) based on technometers and techno economics by looking at the sensitivity and feasibility of the business. The results show that the readiness level of the seaweed soft capsule prototype technology is at level 7, meaning that it has been scaled up but several parameters in industrial scale scale-up must be improved. For the feasibility techno-economic analysis of the seaweed soft capsule prototype, the Net B/C result was obtained with a value of 1.64. The NPV results obtained were 4,621,393,281, with an IRR of 33%. The payback period is estimated to be 3.01 years. The level of technological readiness and feasibility results show that the development of soft capsule prototypes for downstream commercialization has good prospects, as long as the availability of raw materials is guaranteed.

Global warming potential of lithium-ion battery cell production: Determining influential primary and secondary raw material supply routes

This study assesses the global warming potential (GWP) impacts of lithium-ion battery (LIB) recycling and subsequent cell production from primary and secondary raw materials. Furthermore, the study proposes multiple allocation strategies for the GWP impacts of LIB recycling, which range from 18 to 22 kg CO2 equivalent per kilowatt-hour NMC111 and NMC811 battery packs to determine the environmental burdens of secondary raw materials. The results demonstrate that using secondary raw materials could ideally reduce NMC111 and NMC811 cell production GWP by 30 %. In practice, GWP impact reductions will vary depending on factors, such as the contributions of primary production and recycling to battery raw material supply, and the market share of the different technologies employed within both primary production and recycling.Based on estimates for the availability of recycled raw materials to the European battery value chain, the sensitivity analysis methods identified NMC hydroxide, nickel sulfate, and battery-grade graphite as the most influential recycled raw materials on NMC111 cell production GWP. These materials received importance scores of 59%, 8%, and 6% respectively. Primary supply routes for cobalt sulfate received the highest importance score, followed by the primary supply routes of lithium carbonate and nickel sulfate. For NMC811 cells, nickel sulfate (34%), NMC hydroxide (27%) and graphite (8%) were identified as the most influential recycled raw materials, with the primary supply routes of nickel sulfate, lithium hydroxide and battery-grade graphite being the most influential.

Potential Development and Economic Analysis of Bioethanol Fabrication Design from Oil Palm Biomass with Ionic Liquid Choline Acetate Using SuperPro Designer (SPD) Software

The increasing use of energy causes the availability of energy, especially in Indonesia, to be depleted. This condition encourages humans to develop renewable energy sources, one of which is bioethanol, with the availability of abundant raw materials in nature. However, the development of bioethanol is still ineffective because it requires a long time and has high costs. Therefore, a design for bioethanol fabrication from oil palm plantation products with ionic liquid pretreatment using SuperPro Designer (SPD) software was developed. The bioethanol production process was simulated through three stages: pretreatment, enzymatic saccharification, and fermentation. Pretreatment was carried out using the ionic liquid Choline Acetate, after which the results of saccharification and fermentation were analyzed. The results of saccharification showed that around 138 g/L of palm oil was converted into sugar for fermentation. The overall result of the simulation system is that the fermentation process for 12 hours produced 92 g/L ethanol or 96% of the theoretical yield. Meanwhile, ethanol production through fabrication for energy can reduce ethanol prices by 30% from their initial price. This ethanol fabrication design is very supportive of optimizing biomass into bioethanol. Therefore, this design can be used as a recommendation for economical bioethanol production to obtain optimal results in bioethanol production.

Potential Projection of Non-Production Waste and GIS-derived Biomass Waste Potential Mapping Outside PT. XYZ for Boiler Alternative Fuels

Non-process waste such as wooden pallets, cardboard, and plastic in the manufacturing and/or processing industries can be used as a source of fuel that provides added value to the company. PT. XYZ is a Japanese manufacturing company that produces foodstuffs. During the production process, PT. XYZ produces non-process waste from internal sources in the form of wood, cardboard, and plastic. So far, this waste has not been used optimally. Therefore, in this study non-process waste will be projected using several time series models (AR, MA, ARMA, and ARIMA) as an illustration for the availability of raw materials to fulfil biomass fuel. In addition to waste in the factory, biomass waste is also mapped in the area around PT. XYZ for the fulfilment of biomass fuel using GIS (Geographic Information System). The time series analysis indicates that ARIMA model (0,1,1) without constants shows the smallest MAPE (14.7%) for wood waste, ARIMA model (1,1,0) without constants shows MAPE (27.39%) for cardboard waste, while plastic waste suits the ARIMA model (0,1,1) without constants yielding MAPE of 20.3%. Further, mapping of biomass waste potential around PT. XYZ, in Mojokerto, is subjected to the teak wood biomass waste (Tectona Grandis L.f) and eucalyptus. The biomass waste from teak wood waste and eucalyptus is potentially 783.1 tons/month and 0.3 tons/month, respectively. The projected results of biomass waste both inside and outside the factory can substitute 16.34% of coal fuel from the total fuel requirement in the boiler, i.e., 5143.7 tons/month.

Research on Buyer-Supplier Relationship Strategy, Contribution to The Company’s Business Development

Supplier-buyer courting method is one of the key elements contributing to the performance of the pharmaceutical enterprise because it affects the capacity of providers to deliver and steady uncooked substances for the producing process.The enterprise faces availability issues of uncooked substances in phrases of time and amount required because of delays in deliver from providers (inconsistent uncooked cloth deliver and delivery), this trouble is getting worst because of low and fluctuating forecast accuracy conditions. The phenomenon of the COVID-19 pandemic also worsened the condition of the availability of raw materials because the pandemic caused a shortage and disruption of raw material supply. This have a look at is a qualitative have a look at with descriptive evaluation from interviews consultant informants of consumers and providers. The cause of have a look at is to research the important thing elements that impact dating techniques between providers and consumers, in the long run contributing to enterprise continuity and performance. The effects of this situation have a look at highlight motivation factors, dedication and obligation factors, consider and reputation factors, courting factors, communique and statistics sharing factors, agreement factors, fine and reliability factors, overall performance evaluation factors, help control factors, and procurement strategies. Factors are key factors in a buyer-dealer courting approach to make sure and make sure the provision of uncooked substances in enough quantity, timeliness and fine, contributing to commercial enterprise continuity and overall performance.

Study of Value-Added Soybean-Based Processed Products in Three Regencies of East Java Province

The soybean stock availability in Pasuruan, Jember and Banyuwangi regencies of East Java Province has experienced a very worrying development in the past few years due to decline in production by above 29 per cent. This has implications for the sustainability of the tofu and soybean cake (tempeh craft). Along with the limited availability of raw material, i.e. soybean, the production costs tend to reduce the added value. The purpose of this study was to analyse the added value, the relationship of soybean commodity stock availability and added value, the factors that influence profit, and the added value of the tofu & tempeh craft. Descriptive correlative method with survey and non-probability sampling techniques as well as data collection techniques through in-depth interviews were used for this study. For data analysis, Hayami method, Pearson Product Moment Correlation, and Cobb-Douglas Model Multiple Regression were used. The results of this study revealed that i) the average value added of tofu & tempeh products is IDR 8,608.09 per kilogram of raw materials with an added value ratio of 47.11 per cent; ii) there is a fairly strong positive relationship between the variable stock availability of raw materials and the added value of tofu & tempeh products, iii) the variable of the amount of production, and the price of production have a significant effect on the profit of the tofu & tempeh craft at the real level α1 per cent; and 4) variable amount of soybean raw material significantly influences the added value of tofu & tempeh products at the real level of 1 per cent.

Butterfly-tie like MnCO3@Mn3O4 heterostructure enhanced the electrochemical performances of aqueous zinc ion batteries

Due to the limited exploitation and utilization of fossil energy resources in recent years, it is imperative to explore and develop new energy materials. As an electrode material for batteries, MnCO3 has the advantages of safety, non-toxicity, and wide availability of raw materials. But it also has some disadvantages, such as short cycle period and low conductivity. In order to improve these deficiencies, we designed a MnCO3@Mn3O4 heterostructure material by a simple solvothermal method, which possessed a microstructure of “butterfly-tie”. Owing to the introduction of Mn3O4 and the layered structure of “butterfly-tie”, MnCO3@Mn3O4 possessed a discharge capacity of 165 mAh/g when the current density was 0.2 A/g and exhibited satisfactory rate performance. The MnCO3@Mn3O4 heterostructure was optimized by density functional theory (DFT), and the deformation charge density was calculated. It was found that the MnCO3@Mn3O4 heterostructure is stable owing to the molecular interaction between the O atoms from MnCO3 and the Mn atoms from Mn3O4 at the interface of heterojunction. Therefore, the MnCO3@Mn3O4 heterostructure material has promising applications as safe and efficient cathode material for energy batteries.