Organic Feed Research Articles

Bacterial cellulose-graphene oxide composite membranes with enhanced fouling resistance for bio-effluents management

Bacterial cellulose composites hold promise as renewable bioinspired materials for industrial and environmental applications. However, their use as free-standing water filtration membranes is hindered by low compressive strength, fouling, and poor contaminant selectivity. This study investigates the potential of bacterial cellulose-graphene oxide composites membranes for fouling resistance in pressure-driven filtration. Graphene oxide dispersed in poly(ethylene glycol) (PEG-400) is incorporated as a reinforcing filler into 3D network of bacterial cellulose using an in-situ synthesis method. The effect of graphene oxide on in situ fermentation yield and the formation of percolated-network in the composites shows that the optimal membrane properties are reached at a graphene oxide loading of 2 mg/mL. The two-dimensional graphene oxide nanosheets uniformly dispersed into the matrix of bacterial cellulose nanofibers via hydrogen-bonded interactions demonstrated nearly twofold higher water flux (380 L m−2 h−1) with a molecular weight cut-off ranging between 100–200 KDa and a sixfold increase in wet compression strength than pristine BC. When exposed to synthetic organic foulants and bacterial rich feed solutions, the composite membranes showed more than 95% flux recovery. Additionally, the membranes achieved over 95% rejection of synthetic natural organic matter and bacterial rich solutions, showcasing their enhanced fouling resistance and selectivity.

A choice experiment for different preparation methods of eggs: The impact of sensory, health, and animal welfare

The risk of salmonella food poisoning increases the lower the degree of heating the eggs.This study investigated the effect of cooking methods on the willingness to pay (WTP) for sterilization method.The choice experiment consisted of eight attributes; yolk color (yellow vs. orange), grade (special vs. first grade), omega-3 (3 levels), egg sterilization method (no sterilization vs. sodium hypochlorite vs. pasteurization), hen feed (antibiotics vs. antibiotic-free vs. organic), hen’s breeding method (caged vs. cage-free), production area (in-prefecture vs. outside of prefecture), and price (5 levels).The online survey included 1,000 Japanese consumers. A within-design was employed in which everyone responded under the assumptions of eating a hard-boiled egg, a soft-boiled egg, and a raw egg.As the degree of heating decreased, the WTP for the sterilization attribute became higher. Sodium hypochlorite was always higher than pasteurization. As the degree of rawness increased, the WTP of antibiotic-free and organic feed rise. However, the organic feed had a lower WTP than the antibiotic-free feed. When eating raw eggs, the WTP of antibiotic-free was the second important compared with the sterilization. As the degree of rawness increased, the WTP of the orange color of the yolk rise, and finally reached three times higher when eating raw eggs than when eating hard-boiled eggs. The WTP of local production was not significantly different in any case. Omega-3 had a significant negative WTP only for raw eggs. Cage-free had a significant negative WTP only for boiled eggs.

Virtual Sensing of Nitrite: A Novel Control for Safe Denitrification in Recirculating Aquaculture Systems (RASs)

Recirculating aquaculture system (RAS) technology is seen worldwide as a solution for sustainable fish production. However, there are still deficiencies in the process technology imperiling consistent operation and thus economic results. Drawbacks are linked to essential processes of the water treatment systems such as denitrification. Nitrogenous waste needs to be removed from RAS process water to maintain an adequate production environment for fish and to mitigate the environmental impact of discharged process water. At present, denitrification lacks reliable process control, especially regarding the organic carbon feed to heterotrophic denitrification processes. An investigation into heterotrophic denitrification in an experimental RAS resulted in the discovery of a virtual sensor based on measurements of the oxidation reduction potential (ORP). The virtual sensor responds to an insufficient carbon feed to denitrification. It is based on the oxidation of nitrite in an ozone-enhanced foam flotation installed downstream of the denitrification. The sensor essentially delivers a binary signal denoting either a complete or an incomplete denitrification process. The virtual sensor can be used for reliably controlling heterotrophic denitrification. It requires an upgraded process chain employing ozone-enhanced foam flotation (protein skimmer) downstream of the denitrification. However, the virtual sensor does not require any additional instrumentation.

Screening of the biphenyl polyamides nanofilms appropriate for molecular separation in organic solution feed

Developing polymeric separation membranes that combine excellent solvent stability, high permeability, and customizable molecular weight interception remains a challenge. Herein, thin-film composite (TFC) polyamide (PA) membranes with poly(ether ether ketone) (PEEK) support and biphenyl-centered polyamides active layer were fabricated through interfacial polymerization technique for the first time. Enhanced solvent stability was exhibited by the fabricated membranes due to the intrinsic resistance to organic solvents possessed by PEEK and biphenyl polyamides. The separation performance of the obtained membranes was systematically studied by relating to the properties of PA nanofilms in terms of nano-mechanical strength, morphologies, and microporosity. The organic solvent nanofiltration (OSN) performance of the resultant membranes in terms of permeability and molecular weight cut-off (MWCO) could be regulated. The optimized membrane exhibited a pure solvent permeability as high as 21.6 L m−2 h−1 bar−1 for acetonitrile and 14.0 L m−2 h−1 bar−1 for methanol. It also showed excellent long-term durability with almost unchanged permeability as well as solute retention remained above 97.8 % after a cumulative OSN operation of N, N-Dimethylformamide (DMF) based feed for 240 h. In particular, OSN membrane with targeted MWCOs covering the range of 170–370 g·mol−1 could be fabricated by selecting appropriate biphenyl acyl chlorides as building blocks. This approach offers a scalable and versatile platform for the development of solvent-stable, highly permeable, and customizable MWCO membranes for process-oriented OSN.

Analysis of the prospects for the development of organic pig farming in Russia

The paper is devoted to the study of factors that form the conditions for the development of organic pig production. The relevance of this topic is due to the growing interest of consumers both domestically and abroad in organic products as the basis for a healthy lifestyle and the resource potential available in Russia, which is sufficient to form a sector of producers — competitive participants in the world market. Based on the use of statistical methods for time series alignment, the authors have identified positive trends in traditional pig production, meat consumption and outpacing growth rates of demand for pig products. It has been determined that stable growth of real incomes of the population in all constituent entities of the Russian Federation can become the basis for the growth of effective demand for organic pig products. The paper summarizes the requirements for the organization of organic production in pig farming, taking into account internal regulatory documentation and foreign experience. Previous studies conducted by the authors showed that the existing soil and climatic conditions in the regions of the Russian Federation make it possible to produce organic feed for this industry, and the expansion of production is one of the target indicators of the Strategy for the Development of Organic Agriculture in the Russian Federation until 2030. The authors identified a number of risks in the work that must be taken into account when creating projects for the development of organic pig farming at the micro and macro levels.

SUSTAINABLE AQUACULTURE; ORGANIC INNOVATIONS FOR DISEASE PREVENTION AND HEALTH MANAGEMENT IN NILE TILAPIA (OREOCHROMIS NILOTICUS)

Sustainable aquaculture has become imperative in guaranteeing the enduring prosperity of aquatic farming, specifically for the Nile tilapia (Oreochromis niloticus), one of the most extensively farmed fish species. This study examines organic developments in Nile tilapia farming focused on eco-friendly practices that reduce the use of artificial chemicals and antibiotics to avoid sickness and maintain health. Integrating natural probiotics, probiotics, and immunostimulants into fish meals is one of the most critical tactics for strengthening the immune system and boosting the resistance of Nile tilapia against parasitic, bacterial, and viral infections. By maintaining the fish's natural defenses and promoting intestinal health, these natural additions lessen the need for conventional antibiotics. Moreover, the employment of beneficial microorganisms and biofiltration systems are two sustainable water management strategies that are essential for limiting the spread of illness in aquaculture settings. By emphasizing water quality through natural filtration processes, organic pond systems create a more balanced environment, lowering stress levels and disease susceptibility. By minimizing nutrient run-off, organic feed formulations using plant-based components, essential oils, and herbal extracts improve fish health and reduce the environmental effects of aquaculture techniques. This analysis also assesses these organic systems' economic viability, emphasizing how cost-effective and scalable they are compared to conventional aquaculture techniques. The aquaculture sector may minimize ecological impact while increasing fish health, producing better results, and adding to global food security through sustainable methods in Nile tilapia cultivation. To further advance sustainable aquaculture in the future, more studies are required to maximize these advances under various environmental circumstances and tilapia strains.

Amino Acid Content in the Muscles of the Red Deer (Cervus elaphus) from Three Types of Feeding Grounds

This study aimed to analyze the amino acid profile, with a particular focus on the nutritional value of the protein of the longissimus lumborum (LL) and the semimembranosus (SM) muscles of deer originating from three feeding grounds: forest (FFG); conventional (CFG) grounds; organic farm (OFG). This is the first time that deer from an organic farm feeding ground have been included in this study. The muscles were collected from 36 deer carcasses with equal proportions of sex and 31 months of age. This study demonstrated significantly higher essential amino acid (EAA) and non-essential amino acid (NEAA) contents in the muscles of deer from the FFG and CFG compared to the OFG. However, the EAA-to-NEAA ratio was significantly higher for the muscles of deer from the OFG. The muscles of the FFG and CFG deer were characterized by a higher concentration of lysine as well as acidic and tasty amino acids compared to the OFG deer, with the muscles of the latter exhibiting a higher percentage of branched-chain amino acids (BCAA). The results obtained can be used professionally by nutrition specialists in preventive and therapeutic diets and breeders to make decisions about farm location and deer feeding strategies.

The importance of application of medicinal plants and natural products in poultry health management

Application of herbs and natural medicines have shown to have no negative side effects, with high effectiveness to improve productivity. Usage of medicinal plants can increase gut function, improve hepatic function, inhibition of prooxidant enzymes, enhance antioxidant content, improve shelf life, enhance sensorial value, better nutritive value, improve both health and consumers preference, enhance calcium and other minerals, increase vitamin B and folate, and enhance immunity. The most important medicinal plants with antiparasitic activities are green tea, guar bean, pine bark, grape seed, barberry root bark, Rangoon creeper, olive tree, and wormwood. Some other important medicinal plants in poultry industry are black pepper, nettle, shrubby sophora, Aleppo oak, garlic, red cedar, ginger, mint, tobacco, turmeric, aloe vera, etc. The application of herbal medicines can be considered as an important alternative to treating parasitic infections. In organic broiler production with application of medicinal plants, decreasing hormones, growth promoters and antibiotics should be considered as well as paying more attention to selection of appropriate organic feed management with considering higher production. This article aims to survey on the importance of application of natural products and medicinal plants in poultry industry by considering secondary metabolites such as triterpenoids, coumarins, alkaloids, tannins, and flavonoids due to their anti-inflammatory, antiparasitic, antimicrobial, antioxidant, and astringent properties.

PSVII-29 Integrating hybrid rye into organic pig production to reduce feed and bedding costs

Abstract An obstacle to profitable organic swine production is the high cost of feed and bedding. We evaluated whether growing hybrid rye for organic feed and bedding for pigs was economically viable by replacing corn with hybrid rye and evaluating pig growth performance and feed and bedding costs. Hybrid rye was grown on certified organic land at WCROC in 2022 and 2023. Rye grain and straw were used in a feeding trial with pigs raised according to the National Organic Standards. The animal trial consisted of three replicates. Each replicate included 100 pigs in two pens (Control vs. Rye, 50 pigs/pen) in a bedded hoop barn. Control pigs were fed corn soybean meal-based diets and Rye pigs were fed diets with 50% of corn in the control diets replaced by hybrid rye. Each replicate lasted for about 12 wk until pigs reached market weight (120 kg). Pigs were weighed individually at the beginning, every 4 wk thereafter, and at the conclusion of the study. Feed disappearance was recorded on a pen basis at the time of weighing pigs. Growth performance[average daily gain(ADG), average daily daily feed intake (ADFI), and Gain: Feed] was calculated for each weigh period. Carcass weight was recorded at harvest and dressing percent was calculated for each pig. Bedding usage was recorded for each pen (Control pen = wheat straw, Rye pen = rye straw) and average usage for each pig was calculated. Growth performance and bedding usage data were analyzed using the Proc Glimmix Procedures of SAS, with dietary treatment as the fixed effect, replicate as the random effect, and pen as the experimental unit. Production costs were set at $239/ha for organic rye grain and $20/ha for rye straw baling according to the FINBIN Database, and the unit costs ($/kg) were calculated based on yield for each year. Prices for organic corn, soybean meal, base mix, wheat straw, and market pigs were based on market prices (Table 1). Yield of organic hybrid rye grain at WCROC was 1,070 and 712 kg/ha in 2022 and 2023, respectively, with corresponding rye straw yield being 661 and 367 kg/ha. The reduction in rye yield in 2023 was considered due to drought. No difference was detected in growth performance, dressing percent, or bedding usage between Control and Rye pigs (all P > 0.19; Table 1). Replacing 50% of corn with hybrid rye saved $9.6/pig in 2022, but cost $7.20/pig more for feed in 2023, due to changes in hybrid rye grain yield. Savings on bedding were $15.40 and $13.20/pig for 2022 and 2023, respectively. Results indicate that replacing 50% of corn with hybrid rye in feed did not negatively affect growth performance of pigs raised organically, but the economic viability of integrating hybrid rye into organic pig production may depend on crop yield.

Optimal balance of organic detritus and feed for fish growth and water quality improvement through regulating nutrients cycling

In order to explore the effects of different feed composition on the nutrient level and microbial loop structure in aquaculture ponds, a field simulation experiment in aquaculture ponds was conducted by adding different proportions (0%, 20%, 40% and 60%) of bagasse to fish feed for combined feeding. The addition of bagasse significantly reduced the levels of various forms of nitrogen and phosphorus in the water, especially with the addition of 60% bagasse. In the treatments without addition and with 20% bagasse added, nitrogen and phosphorus levels remained relatively high, which should be attributed to the decomposition of feed and the release of sediment, ultimately stimulating the abundant reproduction of algae. Bacterial growth was limited due to insufficient supply of organic carbon, and the growth of fish relied more on the components of the feed. With the addition of 60% bagasse, the high organic carbon and low nitrogen and phosphorus levels could not support the growth of phytoplankton, bacteria, and zooplankton. It is inferred that organic carbon may be more degraded into carbon dioxide, ultimately limiting the growth of fish. Adding 40% bagasse achieved a balanced level of carbon, nitrogen, and phosphorus, establishing a healthy and stable microbial loop structure (including phytoplankton, bacteria, and zooplankton). Most nutrients were converted into plankton, which then became natural food for fish, ensuring complete nutrient utilization. This is beneficial for both water quality improvement and fish reproduction. Therefore, adding a moderate proportion of bagasse to the feed can maximize the effects of water quality improvement, fish reproduction, and even the quality of fish meat.

Aprovechamiento de residuos: propuesta en la producción de abonos orgánicos - alimento animal en la Mini-industria La Guajira

The use of waste in the production of organic fertilizers and animal feed, in the La Guajira Mini-industry, in the agro-productive scenario of the CPA July 26; The result is inserted into the Project: Municipal climate governance and sustainable agroforestry production of foods with low emissions and adapted to climate change in Cienfuegos and Pinar del Río, Cuba; descriptive, explanatory, non-experimental study, using theoretical and empirical methods. Results: characterization of the Mini-industry, and design of the proposed actions. Conclusions: carrying out a characterization from a social, economic and environmental perspective of the La Guajira Mini-industry, facilitated the understanding of potentialities - weaknesses in the treatment of waste, showed the need to propose new alternatives to contribute to the adaptation to the climate change, the design of a proposal of actions that articulates with the objectives of the Projects and in synergy with the Territorial Social Economic Development Strategy, promotes alternatives for the productive chain in the use of organic fertilizers and animal feed, all of which recognizes the social economic value of the La Guajira Mini-industry, favoring the development of the agro-productive scenario of the CPA July 26.

Karakteristik limbah pertanian dan dampaknya: Mengapa pengelolaan ramah lingkungan penting?

Background: Agricultural waste is a significant by-product of the agrarian sector, with the potential for substantial environmental and economic impacts. This study aims to examine the characteristics of organic agricultural waste and analyze its effects on the environment, both in terms of threats and its potential utilization. Method: This study employs a systematic literature review method. The literature search focuses on articles discussing agricultural waste, its characteristics, and its environmental impacts. Findings: The results show that agricultural waste has diverse characteristics based on fiber composition, physical form, and protein content. The main threats from agricultural waste include water pollution due to nutrient runoff and greenhouse gas emissions, especially methane. However, this waste also holds significant potential as a source of organic mulch, animal feed, and raw material for bioenergy. Utilizing agricultural waste as mulch can improve soil quality and crop yields, while its use as animal feed supports the integration of agricultural and livestock systems. In the context of energy, converting waste into biogas and biofuel offers an effective solution. Conclusion: This study emphasizes the importance of integrated and sustainable agricultural waste management to minimize negative impacts and optimize its economic potential. Novelty/Originality of this article: By providing a comprehensive analysis of the characteristics and impacts of agricultural waste, this study offers insights into the importance of a holistic approach to agricultural waste management to support sustainable agriculture.

Proximate and Sensory Analysis of Organic Fish Feed Based on Fermented Coconut Flour and Earthworm Flour

Latar Belakang: Faktor utama yang mempengaruhi keberhasilan budidaya ikan adalah kualitas pakan yang diberikan pada ikan. Namun perlu diketahui bahwa beberapa pakan ikan komersial mengandung bahan kimia yang dapat membahayakan kesehatan ikan. Metode: Uji proksimat dilakukan dengan tiga rancangan formula yaitu formula A1, A2, dan A3 dengan perbandingan tepung ampas kelapa dan tepung cacing tanah masing-masing 1:2, 2:1, dan 1:1. Dilakukan pula uji sensori pakan yang meliputi warna, aroma, dan tekstur pakan ikan organik. Data yang terkumpul kemudian dianalisis menggunakan IBM SPSS Statistics versi 23. Hasil: Hasil uji proksimat yaitu rata-rata kadar protein formula pakan ikan A1, A2, dan A3 masing-masing 10,85%, 16,28%, dan 13,07%, sedangkan rata-rata kadar karbohidrat formula pakan ikan A1, A2, dan A3 masing-masing 30,04%, 26,54%, dan 27,91%. Sementara itu, hasil uji sensori untuk warna formula pakan A1, A2, dan A3 masing-masing memiliki skor 1,70, 3,70, dan 2,45. Hasil uji sensori untuk aroma formula pakan A1, A2, dan A3 masing-masing memiliki skor 2,90, 3,45 dan 3,05, sedangkan hasil uji sensori untuk tekstur formula pakan A1, A2, dan A3 masing-masing memiliki skor 2,20; dan 3.30. Kesimpulan: Formula pakan yang paling efektif diberikan pada ikan adalah formula A2 yang memiliki kandungan protein tertinggi yaitu mencapai 16,28% dan kandungan karbohidrat sebesar 26,54%.

A Three-way Attack on the Gastrointestinal System- COVID-19, Ehler-Danlos Syndrome, and Anorexia Nervosa Leading to Severe Gastroparesis in a Young Female

A 28-year-old female with a past medical history of Major Depressive Disorder, Generalized Anxiety Disorder, Anorexia Nervosa, Chronic Pain Syndrome, and Gastro-esophageal Reflux presented to our clinic for establishing care in November 2022 with severe gastric dysmotility ever since contracting COVID-19 virus in December 2021. The patient’s symptoms were refractory to Erythromycin and metoclopramide therapy. A GI motility study in February 2022 showed delayed gastric emptying based on which the patient was diagnosed with Post COVID Gastroparesis. Based on an extensive clinical review of the patient’s past medical and surgical history, the patient was found to have cumulative symptoms of GERD, joint instability, abdominal hernia and chronic neuropathic pain, raising the suspicion of Ehler-Danlos syndrome- Hypermobility type. Given the failure of treatment with prokinetic agents and over 60 pounds of weight loss the patient underwent Percutaneous Endoscopic Gastrostomy-Jejunostomy in August 2022, the patient was started on Organic Tube Feeding Formula. To this date, the patient is using the PEG-J for feeding and remains nil per oral. Multiple trials of reintroducing oral feeding have been attempted but the patient still is unable to tolerate oral feeds completely and continues to complain of early satiety, nausea, and vomiting on reintroducing feeds.

Sosialisasi dan Pelatihan Budidaya Maggot untuk Pengelolaan Sampah Organik dan Pakan Ternak di Dukuh Sutorejo

Household waste management is a significant challenge in Indonesia along with population growth and economic activity. In 2021, organic waste contributed 54.31% of the total waste in Surabaya. One innovative solution is the use of bioconversion technology with Black Soldier Fly (BSF) larvae which can decompose organic waste quickly and produce animal feed and organic fertilizer. The socialization and training program in Dukuh Sutorejo aims to introduce and train residents in maggot cultivation as an alternative for waste management and animal feed. This activity includes socialization about the benefits of maggots, training in cultivation techniques, and providing maggot samples for independent cultivation. The evaluation results showed that 91% of participants understood how to apply maggots for organic waste management and animal feed, indicating the success of the program.

Fatty acid composition of selected fish species farmed in Biofloc system

Bangladesh is well known for the abundant range of fish. Though fish consumption and variety are very high in Bangladesh, the biodiversity has been alarmingly declining in recent years due to a number of factors including the country's rapid population growth, industrial water pollution, natural disasters, sea intrusion, salinity, overexploitation of fisheries, use of harmful gear, and dewatering of waterbodies. Given that 60% of Bangladesh's rural poor are functionally landless, lack of access to land and water for agricultural production, and rely, in part, on shared resources like fish for their livelihoods and food, the loss of fish biodiversity could pose a special challenge for them. Considering all of this, biofloc technology ensures safe food and higher productivity in high-density fish farming in a limited area by being sustainable and ageless. In order to satisfy the demands, more creative and effective techniques for growing and harvesting fish have been created as the fishing business has developed. Present study analyses the fatty acid profile of two commonly consumed fish species Oreochromis niloticus (Tilapia) and Systomus sarana (Shorputi). These fishes were farmed in biofloc system. They were fed commercial feeds and organic feed. Later the the fatty acid profile of both groups were measured. The organic feed group showed higher level of PUFA, omega 3 & 6 fatty acid. Through biofloc technology it is possible to produce fish species with high nutritional level using minimum land and water resources. Sustainable food system can be developed through more research in Bangladesh. Bioresearch Commu. 10(2): 1592-1596, 2024 (July)

Impact of membrane characteristics and chemical ageing on algal protein fouling behaviour of ultrafiltration membranes

Membrane characteristics can exacerbate the prevailing challenges associated with membrane fouling in industry. However, the combined impact of deliberate membrane modifications and the unavoidable effects of chemical ageing on fouling behaviour is still not well understood. In this study, three polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes with different pore size and surface roughness were selected and subject to chemical ageing with 5000 ppm sodium hypochlorite (NaOCl) at pH 10.5, selected to simulate accelerated ageing conditions. The impact of NaOCl on membrane characteristics was assessed for exposure times from 1.2 x 105 to 25.2 x 105 ppm·h using scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, contact angle, and clean water resistance analysis. The fouling behaviour of each pristine and aged membrane was compared using 10 mg C·L−1 dissolved organic carbon algal protein feed containing 18 % biopolymeric compounds. The membrane with intermediate pore size presented lower overall filtration resistance compared to the membrane with smaller pores that developed rapid foulant cake layers. It also displayed less susceptibility to fouling via pore blocking mechanisms compared to membranes with larger pores where greater surface area available in pore walls leads to higher foulant adhesion.

Batch and semi-continuous treatment of cassava wastewater using microbial fuel cells and metataxonomic analysis

The treatment of agroindustrial wastewater using microbial fuel cells (MFCs) is a technological strategy to harness its chemical energy while simultaneously purifying the water. This manuscript investigates the organic load effect as chemical oxygen demand (COD) on the production of electricity during the treatment of cassava wastewater by means of a dual-chamber microbial fuel cell in batch mode. Additionally, specific conditions were selected to evaluate the semi-continuous operational mode. The dynamics of microbial communities on the graphite anode were also investigated. The maximum power density delivered by the batch MFC (656.4 μW m-2\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$^{-2}$$\\end{document}) was achieved at the highest evaluated organic load (6.8 g COD L-1\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$^{-1}$$\\end{document}). Similarly, the largest COD removal efficiency (61.9%) was reached at the lowest organic load (1.17 g COD L-1\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$^{-1}$$\\end{document}). Cyanide degradation percentages (50–70%) were achieved across treatments. The semi-continuous operation of the MFC for 2 months revealed that the voltage across the cell is dependent on the supply or suspension of the organic load feed. The electrode polarization resistance was observed to decreases over time, possibly due to the enrichment of the anode with electrogenic microbial communities. A metataxonomic analysis revealed a significant increase in bacteria from the phylum Firmicutes, primarily of the genus Enterococcus.

Elemental analysis of “kampong” chicken egg shell content using a Nd-YAG laser induced breakdown spectroscopy

Abstract Distinguishing between eggs laid by chickens fed organic versus chemical feed poses a formidable challenge, particularly when relying on eggshell characteristics alone. As such, this investigation was undertaken to conduct a qualitative exploration of the eggshell composition in free-range chickens, employing laser induced breakdown spectroscopy (LIBS) to discern varying feed treatments within the samples. To initiate the formation of micro-plasma, a Nd:YAG LIBS system has been utilized as the excitation source. The eggshells used in the study were sourced from seven distinct chicken groups subjected to diverse feeding protocols, including 100% industrial feed, 100% village feed, and its combination, and also along with eggshells from purebred chickens purchased from traditional markets. Based on the spectroscopic analysis, the seven samples utilized in this study exhibit a uniform chemical composition, encompassing both organic and inorganic elements, specifically C, O, H, Ca, Mg, Fe, Al, K, Si, and S.

Organic Waste for Bioelectricity Generation in Microbial Fuel Cells: Effects of Feed Physicochemical Characteristics

Food waste (FW), piggery waste (PW), and activated sludge (AS) were investigated as potential organic feeds for bioelectricity generation in laboratory-scale microbial fuel cells (MFCs). The MFCs fed by FW gained the highest maximum power density at 7.25 W/m3, followed by those fed by PW at 3.86 W/m3 and AS at 1.54 W/m3. The tCOD removal in the FW-, PW-, and AS-MFCs reached 76.9%, 63.9%, and 55.22%, respectively, within a 30-day retention time. Food waste, which resulted in the highest power density and tCOD removal, was selected for a series of following tests to investigate the effects of some physicochemical properties of organic feed on the performance of MFCs. The effect of feed particle size was tested with three controlled size ranges (i.e., 3, 1, and <1 mm) in MFCs. A smaller feed particle size provided a higher power density of 7.25 W/m3 and a tCOD removal of 76.9% compared to the MFCs fed with organic waste with a larger particle size. An increment in feed moisture from 70% to 90% improved the maximum power density from 7.2 to 8.5 W/m3, with a 17.5% enhancement, and improved the tCOD removal from 75.8% to 83.3%, with a 10.0% enhancement. A moderate C/N ratio of approximately 30/1 maximized the power density and COD removal (7.25 W/m3 and 81.73%) in the MFCs compared to C/N ratios of 20/1 (4.0 W/m3 and 64.14%) and 45/1 (4.38 W/m3 and 71.34%).