Food Waste Disposal Research Articles

Routes to sustainability in public food procurement: An investigation of different models in primary school catering

Increasingly, policymakers are setting ambitious goals for sustainability in public procurement, integrated across different pillars. Such ambitions are apparent in public catering services, where procurement models have been shifting towards greater localisation of supply chains and purchasing of more organically grown food. To date however, few studies have examined empirically what the impacts of different procurement models are across these multiple pillars of sustainability. This research aimed to fill the gap, by measuring and comparing the environmental, economic and nutritional outcomes of different models of school meals procurement. Case studies were undertaken of ten primary school meals services in five European countries, capturing different procurement model types. Results showed carbon emissions ranged from 0.95 kgs CO2e per meal in the lowest case to 2.41 kgs CO2e in the highest case, with adoption of low carbon food waste disposal methods and reduction of the amount of ruminant meat in the menus being the most important actions for lowering emissions. In terms of economic impact, local economic multiplier ratios ranged from 1.59 to 2.46, and although the level of local food sourcing contributed to these ratios, the effect was eclipsed, in some cases, by investment in local catering staff. Meanwhile, implementation of a robust standards regime and improving canteen environment and supervision were the most important actions for nutritional quality and intake. The paper discusses the implications of the findings for integrated, sustainable models of food procurement.

“Food waste-wastewater-energy/resource” nexus: Integrating food waste management with wastewater treatment towards urban sustainability

Sustainable food waste management is a global issue with high priority for improving food security and conserving natural resources and ecosystems. Diverting food waste from the solid waste stream to the wastewater stream is a promising way for food waste source separation, collection, treatment, and disposal. Given the advances in wastewater treatment, this integrated system has great potential for the concurrent recovery of water, resource, and energy. To this end, many efforts from lab-scale to full-scale studies have been devoted to evaluating the feasibility and associated impacts on both solid waste and wastewater systems. This paper summarizes the current status of food waste diversion from the aspects of principle and application. The impacts of food waste diversion on solid waste treatment, sewer system, wastewater treatment, and environmental benefits have been comprehensively reviewed and analysed. In the context of the critical review, this paper further identified the challenges of food waste diversion in unified definitions of the field, sewer network assessment, emerging wastewater treatment technologies, scale-up studies, and policy drivers. Perspectives on the contribution of food waste diversion to a food waste management hierarchy were discussed for initiating the nexus of “food waste-wastewater-energy/resource”. We conclude that food waste diversion could facilitate sustainable urban development, but the area-specific factors (e.g., household practices, water resource, sewerage system condition, and treatment techniques) require adequate evaluations to determine the implementation. The outcomes of this study could contribute to the practice and policy-making of food waste management towards urban sustainability.

Livestock and environment

Relevance.With the development of the application of the achievements of scientific and technological progress in agricultural production, agriculture began to take more from nature, and instead throw in there a huge amount of waste generated as a result of activities. Therefore, the problem of environmental protection in agricultural production, especially in industrial animal husbandry, has become urgent. Livestock and poultry farming with their manure, dung, greenhouse gases and other wastes have begun to pollute the environment more. These pollutants reduce soil fertility and productivity, and deteriorate the quality of water and atmospheric air. As a result, agricultural production itself suffers, agricultural products are received in less amount and the quality of products deteriorates.Materials and research methods.The material of the study was the data of environmental statistical reporting of the Russian Federation and its subjects over the last 10 years, as well as materials of periodical scientific publications on environmental problems. In the course of the research, abstract-logical, monographic, computational-constructive, comparative analyzes and statistical methods were used.Results.According to the state reports “On the state and protection of the environment of the Russian Federation”, the agro-industrial complex in modern conditions continues to be the main pollutant of land and other elements of the environment. More than 45 types of pollutants are emitted into the environment from livestock farms and complexes and poultry farms. Atmosphere air is contaminated with microorganisms, dust, ammonia and other animal waste products. Large volumes of manure and droppings generated in the course of the activity of livestock enterprises, the complexity of their processing and disposal indicate the need to use a variety of ways to solve the problem of effective treatment of manure and droppings. In this sense, the chinese waste disposal technology is of particular interest. China is now took the leading positions in the world in the biological disposal of food and agricultural waste with the help of black lion fly larvae.

Carbon footprints and land-use systems

Carbon Footprint (CFP) refers to the emission of all greenhouse gases (GHGs) during a given period by any activity or entity. The standard unit for measuring it is the carbon dioxide equivalent (CO2eq), such that the impact of each GHG is expressed in terms of the amount of CO2 that would create the same amount of warming. It is widely recognized that the 2020 global value for average per capita CFP (estimated as 4.47 Mg CO2eq) is not sustainable and that it must be reduced to < 2 Mg CO2eq if global warming is to be limited to 20C. Recent estimates show that 31% of human-caused GHG emissions originate from the world’s agri-food systems, the major sources being deforestation, livestock production (from enteric fermentation and manure), food waste disposal, and fossil fuel use (by farms and the food-retail sector). Land application of chemicals such as fertilizers, weedicides, and insecticides is the most significant factor in the AFOLU (agriculture, forestry, and other land-use) sector. Enhancement of the natural process of terrestrial C sequestration in soil and vegetation is a widely recognized approach to reducing the AFOLU sector CFP. The adoption of multispecies agroforestry systems with nitrogen-fixing trees is a promising strategy for accomplishing this goal. Another is integrated silvopastoral systems that combine animal production with deep-rooted grass and trees that could counteract the GHG emission through enteric fermentation in animals with enhanced soil C sequestration.

Carbon footprints and land-use systems

Carbon Footprint (CFP) refers to the emission of all greenhouse gases (GHGs) during a given period by any activity or entity. The standard unit for measuring it is the carbon dioxide equivalent (CO2eq), such that the impact of each GHG is expressed in terms of the amount of CO2 that would create the same amount of warming. It is widely recognized that the 2020 global value for average per capita CFP (estimated as 4.47 Mg CO2eq) is not sustainable and that it must be reduced to < 2Mg CO2eq if global warming is to be limited to 20C. Recent estimates show that 31% of human-caused GHG emissions originate from the world’s agri-food systems, the major sources being deforestation, livestock production (from enteric fermentation and manure), food waste disposal, and fossil fuel use (by farms and the food-retail sector). Land application of chemicals such as fertilizers, weedicides, and insecticides is the most significant factor in the AFOLU (agriculture, forestry, and other land-use) sector. Enhancement of the natural process of terrestrial C sequestration in soil and vegetation is a widely recognized approach to reducing the AFOLU sector CFP. The adoption of multispecies agroforestry systems with nitrogen-fixing trees is a promising strategy for accomplishing this goal. Another is integrated silvopastoral systems that combine animal production with deep-rooted grass and trees that could counteract the GHG emission through enteric fermentation in animals with enhanced soil C sequestration.

The Interactive Force between Fat, Oil, and Grease Deposits and the Effect of Food Waste Disposers on Kitchen Drainage Systems

The Interactive Force between Fat, Oil, and Grease Deposits and the Effect of Food Waste Disposers on Kitchen Drainage Systems

Histological digestive tract of milkfish’s (Chanos chanos Forskal.) from District Ujung Pangkah, Gresik

Milkfish is a commodity with a high production rate. From the milkfish commodity, Gresik is the center of fishery production in East Java. Milkfish belongs to the herbivore group with the type of food from the plant group. Milkfish cultivation in traditional ponds still uses natural food as the main food for the cultivated commodities. Fish food affects the structure of the digestive tract, especially the intestines of fish. herbivorous fish have very long intestines even many times the body length, compared to omnivorous and carnivorous fish. Thus, this study aims to find out more clearly about the structure of the milkfish gut tissue. The digestive tract is related to the process of digestion, absorption and disposal of food waste, so it has an important role in the growth of fish. The research method used was descriptive experimental by making preparations of fish intestinal tissue and staining with Hematoxylin Eosin. The intestines of the fish observed were the front, middle and back. Observation of the preparations using a microscope with a dot slide scan photo. From the results of the study obtained an overview of the intestinal tissue structure of the upper (proximal), middle (middle) and lower (distal) fish. The structure of the front, middle and back of the milkfish gut tissue is similar, the difference lies in the number and thickness of the villi.

DETECTION OF SARS-COV-2 FROM SURFACE OF PATIENTS’ LEFTOVER FOOD PACKAGES AT A COVID-19 QUARANTINE CENTRE

In healthcare facilities, food waste and its packaging are mostly managed as non-infectious general waste. However, waste from SARS-CoV-2 positive patients, are treated as medical waste as they may be contaminated by the virus. We investigated the possibility of SARS-CoV-2 contamination from positive COVID-19 patients to their leftover food packages at a quarantine centre. Food packages surface was swabbed using prewetted cellular foam, placed into viral transport media and analysed using real time reverse transcription polymerase chain reaction. SARS-CoV-2 RNA was detected in two samples (4.5%) from asymptomatic patients who were at day-2 positive SARS-CoV-2 with cycle threshold (Ct) value (RdRp/E), 34.96/35.72 and 37.1/36.48 respectively. Detection of SARS-CoV-2 supports that there is contamination to the waste. These poses risk of exposure as SAR-COV-2 survive on the surfaces, thus, safe handling and disposal of food waste should be maintained. However, further study involving viral culture should be explored to determine the viability of the SARS-CoV-2 from leftover food packages

Life cycle assessment and society willingness to pay indexes of food waste-to-energy strategies

Food waste (FW) has received increasing attention because of its immense production quantities and significance to resource and environmental impacts related to disposal approaches. We combined life cycle assessment (LCA) with society's willingness to pay (WTP) index to evaluate energy, water, and environmental impacts on three food waste-to-energy (FWTE) options in China. For anaerobic digestion (AD) mode, the results showed that 1140 MJ of energy consumption could be saved by power generation from methane, power transmission, and biodiesel production from per ton of FW; the cost of climate change for treating FW was 137.8 kg CO2e t−1 FW, failing to be climate-sound due to the end life of digestate in practice. The total impact to AD mode in the form of monetized value for WTP was 13.3 CNY t−1 FW, of which the collection and transportation, pretreatment, AD reaction, wastewater treatment, biodiesel production, and residue landfilling stages contributed by 10.5%, 6.5%, 19.3%, 27.6%, 4.7%, and 75.7%, respectively, while biogas utilization offset it by 43.9%. Notably, a considerable amount of water used in AD prevented it from showing an advantage compared to incineration (−5.1 CNY t−1 FW), which performed best overall attributing to the generated electricity compensated for primary energy demand, water, and terrestrial acidification to a great extent. Landfilling turned out to be an unappealing FW disposal method due to the low landfill gas capture ratio. Given that AD is touted for its environmental benefits, potential approaches—such as developing a reliable and supportive technology to facilitate digestate recycling into agriculture—were discussed to improve its competitiveness and attractiveness. Our study employed a way to accumulate and compare impact indicators to better interpret FW management impacts and advantages, considering energy recovery, resource recycling, and the environment.

Community scale in-situ rapid biological reduction and resource recovery of food waste

In this study, a community-scale in-situ rapid biological reduction (IRBR) system was applied to achieve the rapid disposal and resource recovery of food waste (FW). A total of 5263 kg FW was processed in the 35 days of stably operation, during which 84.37% total mass reduction and 43.30% volatile solid removal were achieved, and the odor had been effectively controlled. Microbial sequencing results showed that aerobic and facultative thermophilic bacteria were major bacterial community, and vigorous metabolism of both carbohydrate and amino acid were maintained during the IRBR process. The final products have the potential to be recycled as organic fertilizers or bio-solid fuel to realize resource recovery. The results of economic analysis showed that the IRBR system had lower FW disposal costs due to the high automation. These results suggested that the IRBR system was an environmentally friendly, economical and practical method for the FW rapid treatment.

AN EFFECTIVE BIOSORBENT DERIVED N EFFECTIVE BIOSORBENT DERIVED FROM PRODUCTION WASTE ROM PRODUCTION WASTE FOR WATER TREATMENT: STUDYING OR WATER TREATMENT: STUDYING THE ADSORPTION OF SYNTHETIC DYES HE ADSORPTION OF SYNTHETIC DYES

Introduction. Eco-friendly disposal of food waste, in particular, nutshells and fruit kernels, is an important issue to ensure sustainable nature management. These secondary raw materials are the source of valuable polymeric materials, cellulose and lignin.Problem Statement. IGiven the capacity of the food industry in Ukraine and the amount of waste produced, the development of technologies for processing lignin-cellulose biomass is an important research and practical issue.Purpose. The purpose of this research is to study the adsorption properties of chemically modified biosorbent based on plant materials concerning synthetic dyes of different types and classes; to assess the feasibility of biosorbent production and efficiency of its application in water treatment.Materials and Methods. Lignocellulose sorbent (LCS) has been synthesized from non-wood raw materials by chemical modification with the use of phosphoric acid with the addition of urea in an aqueous media. The Fourier transform infrared and standard methods of plant raw material analysis have been used to determine the physicochemical characteristics of LCS. The adsorption of anionic (methyl orange, alizarin red S, eosin Y), cationic (methylene blue, neutral red), and nonionic (aniline yellow) dyes on LCS from aqueous solution has been studied in the batch mode.Results. The adsorption capacity of LCS towards cationic dyes (47.0–53.3 mg/g) is higher than that of anionic (22.2–36.9 mg/g) and nonionic (4.7 mg/g) ones. The adsorption kinetics have been adequately described by a pseudo-second-order equation. Adsorption of all classes of dyes on LCS is thermodynamically feasible, spontaneous, and endothermic process. The liquid by-product of LCS production contains 15% nitrogen and 10% phosphorus, so it may be used as a fertilizer. Conclusions. The proposed method for processing food waste provides obtaining effective sorbent and liquid NP-fertilizer. LCS removes both cationic and anionic pollutants from water, so it may be considered a promisingbiosorbent for water purification.

Enhanced Energy Recovery from Food Waste by Co-Production of Bioethanol and Biomethane Process

The primary objective of this research is to study ways to increase the potential of energy production from food waste by co-production of bioethanol and biomethane. In the first step, the food waste was hydrolysed with an enzyme at different concentrations. By increasing the concentration of enzyme, the amount of reducing sugar produced increased, reaching a maximum amount of 0.49 g/g food waste. After 120 h of fermentation with Saccharomyces cerevisiae, nearly all reducing sugars in the hydrolysate were converted to ethanol, yielding 0.43–0.50 g ethanol/g reducing sugar, or 84.3–99.6% of theoretical yield. The solid residue from fermentation was subsequently subjected to anaerobic digestion, allowing the production of biomethane, which reached a maximum yield of 264.53 ± 2.3 mL/g VS. This results in a gross energy output of 9.57 GJ, which is considered a nearly 58% increase in total energy obtained, compared to ethanol production alone. This study shows that food waste is a raw material with high energy production potential that could be further developed into a promising energy source. Not only does this benefit energy production, but it also lowers the cost of food waste disposal, reduces greenhouse gas emissions, and is a sustainable energy production approach.

Revealing the methanogenic pathways for anaerobic digestion of key components in food waste: Performance, microbial community, and implications

Anaerobic digestion (AD) process is widely considered the most sustainable technology for food waste (FW) disposal due to its advantage of biomethane recovery and beneficial environmental consequences. However, the effects of key components in FW (i.e. starchy food, vegetables, fruits, and meats) on AD process and their methanogenic pathways remain unclear. In this study, the biochemical methane potential (BMP) of cooked rice, cabbage, banana peel, pork and local FW was 288, 283, 254, 630, and 476 NmL CH4/g VSadded, with t80 (time required for 80% methane produced) of 3, 9, 3, 11 and 11 days, respectively. Kinetic analysis suggested diverse hydrolysis rates (0.104–0.679 d-1) and specific methane yields (39–119 NmL CH4/g VSadded/d). The relative abundances of key methanogens in the reactors were diverse, leading to the variation in acetoclastic and hydrogenotrophic methanogenic pathways. This study provides fundamental information for the operation of AD systems with different FW compositions.

An integrated life cycle multi-objective optimization model for health-environment-economic nexus in food waste management sector

Food waste is a universal problem in many countries. In line with Sustainable Development Goals 7 and 12, it is crucial to identify a cost-effective food waste valorization management framework with the least human health and environmental impacts. However, studies on the synergistic effect of life cycle assessment and mathematical optimization interconnected with human health, environment, and economic are relatively few and far between; hence they cannot provide holistic recommendations to policymakers in developing environmental and economic feasibility of food waste management frameworks. Taking Malaysia as a case study, this study proposes a simple and deterministic model that integrates life cycle assessment and multi-objective mathematical optimization to unpack the health-environment-economic wellbeing nexus in food waste management sector. The model evaluates the life cycle human health, environmental, and economic impacts of five food waste disposal and valorization technologies: open landfill, sanitary landfill, aerated windrow composting, high-temperature drying sterilization, and anaerobic digestion, and identifies the optimal food waste valorization configuration solution in Malaysia. Based on the results modeled by SimaPro 9.0 and General Algebraic Modeling System with augmented ε-constraint, valorization of food waste into electricity via anaerobic digestion is the most favorable option, with 146% and 161% reduction of human health and ecosystems, respectively, as compared with open landfill. If cost is combined as an objective function with human health and ecosystems, high-temperature drying sterilization is the most attractive scenario due to the high livestock feed revenue. Among the 10 Pareto-optimal solutions, 9% sanitary landfill, 3% aerated windrow composting, 30% high-temperature drying sterilization, 30% anaerobic digestion to electricity, and 28% anaerobic digestion to cooking gas, is recommended as future food waste management configuration. The sensitivity results demonstrate that prices of electricity, cooking gas, and livestock feed affect the optimal configuration food waste management system.

Food waste handling perception in Indonesia: communicating the sustainability of Food and environment

Every week, Indonesia discards approximately 10 million pieces of bread, cakes, and cookies, equating to 292,000 tons of CO2 emissions similar to Indonesia’s annual CO2 emissions. Due to a lack of resources and infrastructure, most impoverished countries rely on antiquated technologies such as anaerobic digestion (AD) to handle food waste. Bakery trash is a biologically formed organic waste that poses a serious threat to public health and the environment, including natural ecosystem contamination. The goal of this study is to find out how much effort Indonesians put into garbage management. How do they spread the word about leftovers through the media? How do they know about waste, particularly bread waste? As well as community-wide corrective steps to protect the environment from domestic food waste management. This study employs a quantitative approach. In order to send 100 questionnaires to persons in Indonesia, purposive sampling was used. Surveys are carried out using Google forms, which require a valid Google email address in order to ensure that each person only takes the survey once. The study’s conclusion is that food waste management efforts among Indonesians are hampered by the public’s lack of understanding of food waste management and disposal information in the media. The research sample understands the process of recycling food into pet food when it becomes garbage, according to their perceptions about the end process of food. In terms of food waste awareness, the majority of the participants in this study were aware that food waste is disposed of in landfills rather than being recycled.

Operational load enhancement for an anaerobic membrane bioreactor through ethanol fermentation pretreatment of food waste

Anaerobic digestion (AD) of food waste (FW) tends to result in the accumulation of volatile fatty acids (VFA), especially a large quantity of propionic acid that is inevitably produced. Propionic acid has a significant inhibitory effect on AD at a concentration far lower than acetic acid. Therefore, anaerobic digestion cannot be operated at an excessively high load. We proposed an AD system that used a considerable amount of starch-rich food waste for ethanol fermentation as a pretreatment and reported that it improved methane concentration in biogas with a low propionic acid accumulation even under high-load operation. This study examined whether ethanol fermentation pretreatment (EP) of food waste can contribute to high-load operation on AD using an anaerobic membrane bioreactor (AnMBR). This involved a sequential bath experiment using FW that was saccharized before fermentation to ethanol. The results are compared with those for FW without pretreatment. The organic loading rate (OLR) was stepwise increased to 43.5 g COD/L/d by increasing the feed OLR, the hydraulic retention time (HRT) was six days and methane content was 71%–74%, which is thrice the capability of the control series and the highest load in the reports of medium temperature AD of FW. Furthermore, the primary methanogens were tolerant to ammonia inhibition. Correspondingly, the ammonium produced improved the buffering capacity of AD at high load. Functional archaeal and bacterial communities in the two reactors were examined. The abundance of hydrogenotrophic methanogens in AnMBR are determined to highlight the impact of the EP for FW disposal through 16S rRNA sequence analysis. Because there were multiple methanogens that use hydrogen, the higher decomposition of the substrate was attributable to the maintenance of a lower hydrogen partial pressure. It contributed to create a virtuous cycle with the EP. This study demonstrates the performance of the EP during high loading and long-term AD operation using an AnMBR; moreover, ultra-high load is achieved by changing the metabolic pathway.

Ways to improve the properties of natural wood when using waste vegetable oils

The article is devoted to the development and study of new compositions based on spent sunflower oil for the protective treatment of natural wood. Samples of birch and aspen wood were selected as the subjects of the study. The processing of wood samples was carried out by the method of “hot-cold impregnation”. Refined sunflower oil was used as the oil base of the propearized compounds developed. Plant oil fillers were chosen wood flour, stearic acid, canifol and sikkativ based on metal salts. The use of developed compounds can improve the hydrophobic properties of wood, increase its water and water resistance, as well as reduce swelling in tangential and radial directions. The optimal compositions on the basis of spent vegetable oil for protective processing of birch wood have been selected. The difference in the modifying capacity of the developed compositions for different types of wood is shown on the example of birch and aspen. Propiary compounds based on spent vegetable oil have environmental safety and their use allows the disposal of food waste.

The legal regulation of food waste in Poland and Lithuania in compliance with EU directive 2018/851

Food waste is a global problem, one that has moved up the public and political agenda in recent years. Food is at the core of the United Nations’ (UN) ‘Sustainable Development Goals’. Food waste prevention is also highlighted as a priority area in the ‘2015 Circular Economy Package’. Food waste is an important indicator of sustainability because it embodies the sum of resources being used to produce uneaten food, and food waste disposal has an environmental, economic, and social impact. Directive 2018/851 established amendments to the food waste regulatory regime, including the definition of a food waste category and general provisions, which were related to food waste, providing a strong emphasis on waste prevention and the reporting of data in connection with food waste. New EU food waste rules should be implemented at the national level. Comparative research is needed for identifying any potential implementation problems. Such research will be carried out using case studies of Poland and Lithuania.

Regulation of food waste management in Ukraine and abroad

In the world in general and in Ukraine in particular, there is a catastrophic environmental situation with food waste. The solution to the problem of waste accumulation, the organization of quality control of compliance with legislation in their treatment, the formation of environmental awareness of the population is hampered by the lack of unanimity in defining the essence of waste, industrial waste, waste in the regulatory framework and among scientists. The aim of the work is to study the essence of the definition of food waste in domestic and foreign scientific discussions and regulations in terms of improving the regulation of their treatment in Ukraine. Scientific discussion of domestic and foreign authors on the concept of waste, in particular food, as well as their regulations demonstrate a wide variety of not only definitions but also approaches. This takes into account the legal basis for waste operations, their physical condition and properties, environmental and economic characteristics, the criterion of goal setting, accounting approach and so on. The analysis of the existing classifications of waste stated the absence of a separate category of food waste both in the works of Ukrainian scientists and in domestic regulations, while foreign authors are actively researching this category. According to the results of the study, it is proposed to introduce into the domestic regulatory framework the term "loss of food and food waste" commonly used abroad with the following definition: products (substances) as edible parts of plants and animals produced or collected for human consumption but ultimately not consumed. Critical analysis of domestic environmental legislation in comparison with European allowed to propose the implementation of the Waste Framework Directive, as well as the formation of a hierarchy of waste management priorities: prevention, preparation for reuse, recycling, other types of disposal, elimination as Ukraine's European integration. Areas of further research will be the study of food waste disposal technologies of the modern city.

Life cycle assessment of food waste to energy and resources: Centralized and decentralized anaerobic digestion with different downstream biogas utilization

Anaerobic digestion (AD) has been identified as an efficient food waste disposal technology by many researchers. However, a holistic environmental investigation of different AD configurations integrated with different downstream biogas utilization has never been reported. This study, taking Singapore as an example, compared the sustainability of business-as-usual technology, i.e., incineration, to centralized and decentralized AD with different biogas applications: electricity generation, cooking fuel, and transportation fuel. The results showed that AD scenarios were generally preferable compared to incineration since environmental benefits were observed in seven to fourteen categories for AD scenarios but only four categories for incineration. The decentralized AD with biogas as cooking fuel (Sc_DADcook) achieved the highest environmental benefit in global warming potential (GWP, −238.4 kg CO2 eq./FU) and fossil fuel depletion potential (FFP, −93.5 kg oil eq./FU) among all the analysed scenarios, followed by centralized AD with biogas as transportation fuel (Sc_CADtran). The sensitivity analysis of the different electricity substitution showed that Sc_DADcook and Sc_CADtran lost their advantages when coal-dominated electricity was used, while biogas for electricity generation became favourable with higher environmental savings up to 280% and 150% in GWP and FFP, respectively. Besides, maximizing the methane yield and minimizing the FW collection radius were also identified as important measures to improve the overall environmental performance. Finally, the scenario analysis of different biogas upgrading technologies demonstrated the GWP advantage by membrane separation and benefits in other categories by high pressure water scrubbing. However, biological upgrading needs further optimization particularly of the H2 source associated emissions.