Waste Residues Research Articles

Industrial washing conditions as factor that influence the cellulose structure and mechanical strength of bed linens

It is crucial for companies providing rental and maintenance services to hotels and hospitals to tackle the problem of decreased physical longevity caused by frequent laundering procedures in the industrial textile sector. Proper maintenance of bed linens is vital as they undergo multiple rigorous preservation techniques, such as being treated with chlorine to remove tough stains and sanitize the fabrics. The mechanical strength of fabric made of 100% cotton fibre products greatly relies on the degree of polymerization of cellulose-cotton fibre material. The study evaluated the washing performance of five cotton fabrics. Two weaving pattern variations were used and the fabrics were composed either of 100% cotton or a blend of 50% cotton and 50% polyester fibres. The washing methods included commercial and chlorine-based laboratory washing. 100% cotton fabrics, especially in plain weave show higher tensile strength falls then blended ones. The pure cotton fabric loss much more of its initial strength after only few chlorine-based washings than after hundred commercial ones. Limiting viscosity number values drop in half after hundred commercial washings for cotton fibres taken from tested woven fabrics. In comparison, decline of this parameter after only ten chlorine-based washings is more than 80% of their initial values. Performing the maintenance process without free chlorine, while still retaining its high effectiveness, can notably augment the frequency of maintenance procedures and preserve the mechanical durability of cotton fabrics over a longer time span. This leads to a reduction in textile waste residues.

A Breakthrough in Photocatalytic Wastewater Treatment: The Incredible Potential of g-C3N4/Titanate Perovskite-Based Nanocomposites.

Water pollution has emerged as a major global environmental crisis due to the massive contamination of water resources by the textile dyeing industry, organic waste, and agricultural residue. Since water is fundamental to life, this grave disregard puts lives at risk, making the protection of water resources a serious issue today. Recent research has shown great interest in improving the photocatalytic performance of graphitic carbon nitride (g-C3N4) for wastewater treatment. However, the photocatalytic removal activity of pure g-C3N4 is poor, owing to its minimal surface area, fast recombination of photo-generated electron-hole pairs, and poor light absorption. Recently, titanate perovskites (TNPs) have attracted significant attention in both environmental remediation and energy conversion due to their exceptional structural, optical, physiochemical, electrical, and thermal properties. Accordingly, TNPs can initiate a variety of surface catalytic reactions and are regarded as an emerging category of photocatalysts for sustainability and energy-related industries when exposed to illumination. Therefore, in this review article, we critically discuss the recent developments of extensively developed g-C3N4/TNPs that demonstrate photocatalytic applications for wastewater treatment. The different synthetic approaches and the chemical composition of g-C3N4/TNP composites are presented. Additionally, this review highlights the global research trends related to these materials. Furthermore, this review provides insight into the various photocatalytic mechanisms, including their potential impact and significance. Also, the challenges faced by such materials and their future scope are discussed.

Study on the Rheological Properties of Fly Ash Modified Asphalt Mastics

Fly ash is one of the industrial waste residues with significant emissions in China, and its rational utilization has important economic significance and environmental value. Due to the similarity in properties between fly ash and limestone mineral powder, it is possible to replace the mineral powder filler in asphalt concrete with fly ash. This article explored the feasibility of replacing the mineral powder with fly ash in an asphalt mixture through the study of fly-ash-modified asphalt mastic. Firstly, the microstructures and elemental compositions of fly ash and mineral powder were studied using scanning electron microscopy (SEM) and X-ray diffraction (XRD) tests. Then, the rheological properties of asphalt mastics with different fillers were studied using dynamic shear rheological (DSR) tests. The results show that when the stress level was 3.2 kPa, the change in the Jnr value was different from that at 0.1 kPa, indicating that after increasing the stress level, the Jnr of fly ash asphalt mastic was smaller, and fly ash can improve the high-temperature creep performance of asphalt mastic. Replacing mineral powder with fly ash can improve the high-temperature rheological properties of asphalt mastic, but this damages the elastic and crack resistance properties of the asphalt mastic. In practical applications, partial substitution of mineral powder can be considered for the preparation of an asphalt mixture.

Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing.

The main goal of this study was to examine the efficiency of a newly isolated fungus from quince, Aspergillus tubingensis FAT43, to produce the pectinolytic complex using agricultural and industrial waste as the substrate for solid state fermentation. Sugar beet pulp was the most effective substrate inducer of pectinolytic complex synthesis out of all the waste residues examined. For endo-pectinolytic and total pectinolytic activity, respectively, statistical optimization using Placked-Burman Design and Optimal (Custom) Design increased production by 2.22 and 2.15-fold, respectively. Liquification, clarification, and an increase in the amount of reducing sugar in fruit juices (apple, banana, apricot, orange, and quince) processed with pectinolytic complex were identified. Enzymatic pre-treatment considerably increases yield (14%-22%) and clarification (90%). After enzymatic treatment, the best liquefaction was observed in orange juice, whereas the best clarification was obtained in apricot juice. Additionally, the pectinolytic treatment of apricot juice resulted in the highest increase in reducing sugar concentration (11%) compared to all other enzymatically treated juices. Optimizing the production of a highly active pectinolytic complex and its efficient utilization in the processing of fruit juices, including the generation of an increasing amount of waste, are the significant outcomes of this research.

Synergistic Effects and Kinetics in Co-Pyrolysis of Waste Tire With Five Agricultural Residues Using Thermogravimetric Analysis

Abstract Continued social and mobility development has caused a sharp increase in the number of waste tires, increased environmental pollution, and waste of limited resources. Agricultural residues as a bioresource, which has drawn increased attention in recent years. The thermochemical conversion of waste tires and agricultural residues and their mixtures offers important prospects for scientific development, which can provide energy security and a much reduced environmental footprint. In this paper, pyrolysis of waste tires and its co-pyrolysis with maize stalk, wheat straw, cotton stalk, rape straw, or peanut shell agricultural residues, in mass ratios of 1:1 were investigated at different heating rate using thermogravimetric analysis. The kinetic parameters were calculated using Flynn–Wall–Ozawa (FWO) and Kissinger–Akahira–Sunose (KAS) kinetic models at heating rates of 20, 30, and 50 °C/min. The synergistic effect between waste tires and agricultural residues was explored by calculating the deviation between the experimental and calculated values. The results showed the presence of a synergistic effect between the co-pyrolysis of waste tires and the residual agricultural residues. In the kinetic analysis, activation energies of waste tires, agricultural residues, and their mixtures were calculated using the two models. The reaction followed a multistage reaction mechanism. The differential thermogravimetry behavior of the mixture was similar to the weighted aggregate results of the waste tire and agricultural waste samples, pyrolyzed separately. These results provide some insights into the combined treatment of waste tires and agricultural waste residues.

Use of antibiotics in poultry and poultry farmers- a cross-sectional survey in Pakistan.

Antimicrobial resistance (AMR) which has been ascribed to be due to community carriage of antibiotic-resistant bacteria is highly prevalent in the WHO South-East Asia region. One of the major reasons for this is the misuse of antibiotics in animal farming practices and at the community level, which threatens both human and animal health. However, this problem of antibiotic misuse in poultry farms and in respective farmers is not well studied in countries like Pakistan. We conducted a cross-sectional study in rural Punjab to explore the current practices of antibiotic use in poultry and poultry farmers, associated factors, their healthcare-seeking behavior and biosecurity practices. In the context of antibiotic use for poultry, 60% comprised of Colistin sulfate and Amoxicillin trihydrate whereas Colistin is considered as the last resort antibiotic. In addition, the significant consumption of antibiotics in poultry farms (60%) and poultry farmers (50%) was without prescription by either human health physicians or veterinarians. Most of the farms (85%) had no wastewater drainage system, which resulted in the direct shedding of poultry waste and antibiotic residue into the surrounding environment. The lack of farmers' education, professional farm training and farming experience were the most significant factors associated with antibiotic use and knowledge of AMR. Our study findings show that it is necessary for an integrated AMR policy with the inclusion of all poultry farmers to be educated, a mass awareness program to be undertaken and that strict antibiotic usage guidelines be available to them. Such initiatives are also important to ensure food safety and farm biosecurity practices.

Remediation of arsenic contaminated water and soil using mechanically (ball milling) activated and pyrite-amended electrolytic manganese slag

With the development of industry, heavy metal (HM) pollution of soil has become an increasingly serious problem. Using passivators made of industrial by-products to immobilize HMs in contaminated soil is a promising in-situ remediation technology. In this study, the electrolytic manganese slag (EMS) was modified into a passivator (named M-EMS) by ball milling, and the effects of M-EMS on adsorption of As(V) in aquatic samples and on immobilization of As(V) and other HMs in soil samples were investigated under different conditions. Results demonstrated that M-EMS had a maximum As(V) adsorption capacity of 65.3 mg/g in the aquatic samples. Adding M-EMS to the soil reduced the leaching of As (from 657.2 to 319.8 μg/L) and other HMs after 30 d of incubation, reduced the bioavailability of As(V) and improved the quality and microbial activity of the soil. The mechanism for M-EMS to immobilize As in the soil are complex reactions, ion exchange reaction with As and electrostatic adsorption. This work provides new ideas of using waste residue matrix composites for sustainable remediation of Arsenic in the aquatic environment and soil.

Model-free measurements of calorific content and ash content of mixed garden wastes using a bomb calorimeter

Two of the most important properties of a material to determine its suitability as a waste-to-energy feedstock are its calorific content and ash content (AC). In the literature, it has been widely suggested that using the results from ultimate and proximate analysis to determine the former through empirical models is an accurate method that saves time and reduces labor. In this work we evaluated the suitability of these models for mixed garden waste using samples collected from two geographical distinct municipal waste disposal sites. It was found that when the models, with parameters given in the literature, are used, the errors in the estimates of higher heating values (HHV) could be higher than acceptable limits. Using linear regression, we determined the model parameters for our specific feedstocks based on the measured elemental, AC and the HHV values from a bomb calorimeter that reduced this error, with AC being the best predictor. However, there were still points with errors over 15%, indicating that these empirical models may not be suitable for the highly varying biomass characteristics typical of mixed green waste feedstocks and that direct measurement through bomb calorimetry still provides the most accurate results. We did find though, that the residues from bomb calorimetry could be used to determine the ash content of mixed garden waste as a time-, labor- and energy-saving measure. Standards for ash content measurements involve the use of a furnace. Here we compared two standard procedures to each other and to the bomb calorimeter residue. Statistical analysis explicitly showed for the first time that we are aware of, that the residue of mixed garden waste from bomb calorimetry tests provided a reliable estimate of ash content over a large range with agreement within 10 % to standards and therefore can be used in place of the standards thereby significantly reducing the time and cost of the tests while getting more accurate results for HHV compared to the models suggested in the literature.

A Review of the Design and Performance of Catalysts for Hydrothermal Gasification of Biomass to Produce Hydrogen-Rich Gas Fuel.

Supercritical water gasification has emerged as a promising technology to sustainably convert waste residues into clean gaseous fuels rich in combustible gases such as hydrogen and methane. The composition and yield of gases from hydrothermal gasification depend on process conditions such as temperature, pressure, reaction time, feedstock concentration, and reactor geometry. However, catalysts also play a vital role in enhancing the gasification reactions and selectively altering the composition of gas products. Catalysts can also enhance hydrothermal reforming and cracking of biomass to achieve desired gas yields at moderate temperatures, thereby reducing the energy input of the hydrothermal gasification process. However, due to the complex hydrodynamics of supercritical water, the literature is limited regarding the synthesis, application, and performance of catalysts used in hydrothermal gasification. Hence, this review provides a detailed discussion of different heterogeneous catalysts (e.g., metal oxides and transition metals), homogeneous catalysts (e.g., hydroxides and carbonates), and novel carbonaceous catalysts deployed in hydrothermal gasification. The article also summarizes the advantages, disadvantages, and performance of these catalysts in accelerating specific reactions during hydrothermal gasification of biomass, such as water-gas shift, methanation, hydrogenation, reforming, hydrolysis, cracking, bond cleavage, and depolymerization. Different reaction mechanisms involving a variety of catalysts during the hydrothermal gasification of biomass are outlined. The article also highlights recent advancements with recommendations for catalytic supercritical water gasification of biomass and its model compounds, and it evaluates process viability and feasibility for commercialization.

Removal of hexavalent chromium from aqueous solution using low-cost magnetic microspheres derived from alkali-activated iron-rich copper slag

The utilization of iron-rich copper smelting waste residues is a promising method to treat chromium (Cr(VI)) contaminated wastewater. Improving its recoverability and adsorption efficiency in the adsorption process is the key to their effective utilization. Based on this, magnetic copper slag-based alkali-activated microspheres (CS-AAMs) with controllable particle size were prepared under the activation of sodium silicate by mechanical dispersion-suspension solidification method and used as an efficient low-cost magnetic adsorbent for Cr(VI) removal. The capability of CS-AAMs for Cr(VI) removal was investigated under different conditions. A maximum adsorption capacity of 32.5 mg/g was achieved at the pH of 1. The adsorption capacity can keep 89.25% after four cycles adsorption-desorption experiments. The adsorption process follows pseudo-first-order kinetics and occurs spontaneously with an endothermic nature. Both intraparticle diffusion and chemical complexation controlled the adsorption process. Notably, the electrostatic attraction between Cr(VI) and CS-AAMs played a key role in the adsorption of Cr(VI). The adsorbed Cr(VI) was complexed and partially reduced under the action of active Fe(II) species in CS-AAMs. The findings indicate that the CS-AAMs prepared in this study can efficiently adsorb Cr(VI) from industrial effluents.

A green synthesized medicine residue carbon-based iron composite for the removal of chromium (VI) and cadmium (II): Performance, kinetics and mechanism.

Nowadays, clean-up of heavy metals from wastewaters using waste residue carbon-based material has received increasing attention. In this work, a novel Chinese medicine residue carbon-based nano zero-valent iron composite (CM-nZVI) had been successfully prepared using the combined Chinese medicine residue, FeCl3 and green tea extract. Cr(VI) and/ or Cd(II) removal in water by the CM-nZVI were systematacially investigated with a series of batch experiments. The most relevant findings indicated the adsorption efficiecy and capacity of Cr(VI) by CM-nZVI were respecitvely nearly 98% and 26mg/g under optimized reaction conditions. The negative influences of the cations on the Cr(VI) removal followed the order of Al3+ > Ca2+ > Mg2+ Na+ > K+, but the anions followed the order of HCO3- > PO43- > NO3- > Cl- > SO42-. Humic acid (HA) and ionic strength with high concentrations severely inhibited Cr(VI) removal. The Cr(VI) adsorption on CM-nZVI fitted well by the pseudo-second-order kinetic and Langmuir models. A monolayer endothermic chemisorption occurred on Cr(VI) adsorption over CM-nZVI, and Cr(VI) removal by CM-nZVI primarily involved in the absorption, reduction, precipitation and complexation processes. Both Cr(VI) and Cd(II) removals had been achieved by CM-nZVI at their low concentrations. This CM-nZVI showed a better reusability proprity for Cr(VI) and Cd(II) removal with the regeneration of CM-nZVI through simple pickling. The outcomes of this work show that CM-nZVI could be used an effective material for heavy metals removal from water.

Environmental and agronomic assessment of soil conditioners produced from bauxite residue and oil palm wastes

Soil conditioner is class of products used to enhance physics, physicochemical or soil biological activities, being able to recover disturbed or nutritional unbalanced soils. The formulation of a soil conditioner composed by bauxite residue (BR), and organic oil palm wastes, as raw materials, was recently proposed as an innovative strategy for the Brazilian acid soils amendment. Here we show the results of soil conditioner amended soil leaching tests and agronomical performance. The soil conditioners were formulated by BR mixed with decomposed POC (palm oil compost) and non-decomposed POMW (palm oil mill waste) oil palm wastes, in the proportion of 25% BR + 75% POC (T1) and 50% BR + 50% POMW (T2), in addition to the treatment with 100% POMW without BR (T3) and limestone at a dose calculated to raise soil pH to 6.0 (T4). Except for T4, all conditioners were applied to the soil at doses of 40, 80, and 120 t ha−1 for leaching tests. The experimental plots were composed of polyvinyl chloride columns, filled with 5 kg of soil, with bottles adapted with hoses at the bottom to facilitate drainage of the leachate. After leaching tests, the respective columns were used as pots for the cultivation of Brachiaria grass, stage with addition of a control composed by undisturbed soil (T5). The pH of the leachates had changes, but the use of BR associated with POMW was similar to the use of limestone. Of the 65 chemical elements evaluated, only nine were identified in the leachate, being most of them considered as plant nutrients. As for soil pH, limestone was slightly higher (6.6) than treatments that had BR (5.5). Brachiaria grass cultivated in the soil amended with conditioners showed similar results of limestone treated soil for the parameters of plant development and showed fertility improvement.

Adsorptive Removal of Dye (Methylene Blue) Organic Pollutant from Water by Pine Tree Leaf Biomass Adsorbent

In this laboratory batch adsorption study, the raw pine tree leaf biomass solid waste adsorbent material was used for the removal of methylene blue (MB) dye from water at different physicochemical process conditions. The characteristics of adsorbents were determined for particle size, surface area, the existence of functional group identification, and the morphology of the adsorbent surface. The adsorption was performed at different process conditions, which include solution pH, dye concentrations, adsorbent doses, and temperature, respectively. In this study, it was found that MB dye adsorption increased with increases in solution pH and adsorbate MB dye concentration but decreased with adsorbent doses and temperature at fixed process conditions. The Langmuir isotherm model was best fitted with the experimental equilibrium data, with a higher linear regression coefficient (R2) value of 99.9% among the two widely used Langmuir and Freundlich adsorption isotherm model equations. The maximum Langmuir monolayer adsorption capacity of raw pine leaf was found to be 36.88 mg/g, which was comparable with other reported adsorbent capacities towards methylene blue (MB) dye adsorption. The value of the separation factor, RL, from the Langmuir isotherm model equation gives an indication of favorable adsorption. Thermodynamic parameters such as standard Gibbs free energy change (ΔG0), standard enthalpy change (ΔH0), and standard entropy change (ΔS0) indicated that the methylene blue (MB) dye adsorption by pine tree leaf biomass was spontaneous and exothermic in nature and that the mechanism of adsorption was mainly physical adsorption. Finally, limitations and future studies are also discussed here. The outcome of this batch adsorption study may result in the valorization of locally available large pine tree leaf residue waste, which could be used in water purification.

Interconnected δ–MnO2 nanosheets anchored on porous carbon derived from reed residue waste as high-performance electrode for supercapacitor

Interconnected δ–MnO2 nanosheets anchored on porous carbon derived from reed residue waste as high-performance electrode for supercapacitor

Source Apportionment and Pollution Assessment of Soil Heavy Metal Pollution Using PMF and RF Model: A Case Study of a Typical Industrial Park in Northwest China

Based on the concentration data of seven heavy metal elements[As, Cd, Cu, Pb, Hg, Ni, and Cr(Ⅵ)] in the surface soil of a typical industrial park in northwest China, the characteristics of heavy metal pollution in the industrial park were analyzed, and the ecological risk and pollution were evaluated using the potential ecological risk index and the index of geo-accumulation. The positive matrix factorization (PMF) model and random forest (RF) model were used for quantitative source analysis, and the emission data of sampling enterprises and empirical data of the source emission component spectrum were combined to identify the characteristic elements and determine the emission source category. The results showed that the heavy metals at all sampling points in the park did not exceed the second-class screening value of construction land in the soil pollution risk control standard for construction land (GB 36600-2018). However, compared with the local soil background values, five elements, excluding As and Cr, were enriched in different degrees, presenting slight pollution and moderate ecological risk (RI=250.04). Cd and Hg were the main risk elements of the park. The results of source analysis showed that the five main sources of pollution were fossil fuel combustion and chemical production sources (33.73%, 9.71%, total source contribution rate of PMF and RF, respectively; the same below), natural sources and waste residue landfill (32.40%, 40.80%), traffic emissions (24.49%, 48.08%), coal burning and non-ferrous metal smelting (5.43%, 0.11%), and electroplating and ore smelting (3.95%, 1.30%). The simulation R2 of the total variable of the two models were above 0.96, indicating that the models could predict heavy metals well. However, considering the actual situation of the number of enterprises in the park and roading density, the main pollution sources of soil heavy metals in the park should be industrial sources, and the simulation results of the PMF model were closer to the actual situation in the park.

UTILIZATION Mangifera indica SKIN AND SALT AS ALTERNATIVE ENERGY

Efforts to reduce the use of polluting chemicals environment needs innovation to overcome these problems. One of them is by replacing the chemicals contained in the battery by utilizing mango skin waste became bio-battery. Even mango skin waste in the community is not properly utilized so that mango skin becomes waste that has no value. The purpose of this research is to utilize mango skin as a bio-battery material not only to produce current and voltage sources but it is also expected to be able to reduce the negative effects of disposing of community mango skin waste residue into the environment and reduce dependence on chemicals as battery electrolyte paste which has been used so far. The test parameters carried out were the electricity of the bio-baterry using mango skin and salt samples. This research used 3 weight ratios between mango skin solution and salt solution, namely 15:5 gr, 20 gr:5 gr, and 25:5 gr. The main stages of this research consisted of 3 stages, namely preparation, pH testing, characterization of electrical properties, and electrical analysis of mango skin. The results of the research that has been done, it can be concluded that the smallest measurements of pH, electric voltage, and electric current are produced at a volume of 30 ml (15 gr) of 3.55, 0.53 V, and 1.8 mA. While the highest was produced at a volume of 44 ml of 3.53, 1.53 V, and 1.9 mA.

Separate Hydrolysis and Fermentation of Kitchen Waste Residues Using Multi-Enzyme Preparation from Aspergillus niger P-19 for the Production of Biofertilizer Formulations

This study addresses the management of kitchen waste by transforming it into biofertilizer formulations, utilizing an effective, in-house-developed multi-enzyme preparation. An approach consisting of separate hydrolysis and fermentation bioprocessing processes was used, employing a multi-enzyme preparation from Aspergillus niger P-19 to separately hydrolyze kitchen waste, followed by the fermentation of the hydrolysate for the growth of Klebsiella pneumoniae AP-407, which has biofertilizer traits. This has led to the simultaneous generation of liquid as well as carrier-based biofertilizer formulations with viable cell counts of 3.00 × 1012 CFU/mL and 3.00 × 1012 CFU/g, respectively. Both biofertilizer formulations significantly enhanced the morphometric characteristics and leaf chlorophyll contents of Tagetes erecta, in addition to enriching the soil with essential nutrients. The current study adopted a novel processing technology for the manufacturing of both carrier and liquid biofertilizers, adopting a zero-waste approach for the management of kitchen waste.

An overview of the circular economy activity for small island wastes and marine debris

The national regulation’s scheme to tackle waste and debris in Indonesia’s small islands is by applying the 3R (reduce, reuse, recycle) program. This concept was written in Presidential Regulation no 97 in the year 2017, regarding the National Strategy and Policy of the Management for Household Waste and Similar Waste. Presidential Regulation no. 83/2018 regarding Marine Debris Management also focused on minimizing trash and wastes leaked into the marine water due to anthropogenic activities. The term circular economy has grown significantly since Boulding initiated it in 1966 to countermeasure pollution problems. This paper presents the reality of waste management that occurs in small islands and recommendations for sustainable management according to the circular economy concept. The methodology for this paper was by studying regulations in Indonesia, reviewing circular economy literature, and surveying the reality of waste management implementation in small islands in Kepulauan Seribu, Karimun Jawa, and Wakatobi. The results of the study provide a surprising reality but are common in small islands. Non-organic and solid waste that has no economic value (to be recycled) is used as reclamation material. Economical waste for recycling is managed by a waste bank organization. Organic waste is made into compost or burned in an incinerator that is still functioning. The waste residue on the island is then transported using a garbage transport ship (specifically for the Kepulauan Seribu). For the Karimun Jawa Islands, residual waste is only collected at the temporary dumping area (TPS) in the form of a landfill. Similarly, what happened in the Wakatobi Islands, the residual waste was piled up at the TPS. The implementation of a circular economy in small islands achieves only 2R (reuse and recycle) activities of the 7Rs (redesign, reduce, reuse, repair, refurbish, recycle, and recover). Based on the observation of activities of commercial organizations or communities, the status for implementing a fully circular economy on the small islands is a long journey ahead.

Public practice on the unused pharmaceutical waste and the effect on surface water

Pharmaceutical waste is a waste that kept piling up by the days due to the increasing production of it. This issue leads to the detection of pharmaceutical waste residue in the water surface based on the previous studies that were conducted. This study was conducted to know the public practice on how they dispose of their unused pharmaceutical waste and help them to know the effect of that action to the water. A questionnaire was distributed to the target respondents to know their practice on how they dispose of the waste and the collected data were analysed to evaluate the public awareness about the effect of pharmaceutical waste to surface water. About 60 percent of the respondents knew that disposing of pharmaceutical waste can contaminate the surface water, yet there is still 24 percent of them that still dispose it by flushing it down the toilet. According to the study, the residue of the pharmaceutical waste can still be detected in drinking water even after water treatment. Antibiotic resistance may result from continued consumption even when there are no specific studies to demonstrate a direct connection to the water supply. It is also evident from the study that the respondents lacked sufficient knowledge about the proper and safe methods for disposing of unwanted pharmaceutical waste.

IOT Based Dual Axis Solar Module Tracking Using Cloud Computing

Abstract: We require various kind of energy to survive. Solar energy, which leaves no waste or harmful residue behind, is one of the cleanest and most sustainable energy sources. To exercise it easily, solar photovoltaic (PV) panels can be employed. The bulk of solar panels, it has been observed, are installed at set angles. In order to capture as much incident solar energy as possible and improve the system's performance ratio, the solar tracking device is employed to maintain the solar panel pointed towards the sun throughout the day. Consequently, this research investigates a dual axis sun tracking system from a two-dimensional perspective. carried out to plot a trajectory of where we are on the efficiency map, it was discovered that the current 35–43% effectiveness of two axis tracking arrangement. Second, a general functional model of how an efficient and effective is derived from the review above. Solar panels, two DC motors, an LDR sensor module, a temperature sensor, a humidity sensor, and an electrical circuit typically make up the hardware portion.