Biogas Production Facilities Research Articles

ECONOMIC ASPECTS OF USING THE POTENTIAL OF BIOENERGY CROPS FOR BIOGAS PRODUCTION AND ADVANCED TECHNOLOGIES FOR DIGESTATE APPLICATION

The research examines the prospects for using the potential of the agro-industrial complex of Ukraine to study green technology innovations during economic development under martial law. Based on the study, it is proved that technological innovations in the agricultural sector contribute to economic development and improve the quality of agricultural land. The article analyses the successful implementation of the case of LLC Yuzhef-Mykolayiv Biogas Company, which has successfully restructured the production of a sugar plant and produces biogas and digestate with further processing into electricity and fertiliser. The modern capacities of the studied enterprise are highlighted, which allow to produce 2800 m3 of biogas and ensure the production of 5200 kWh of electricity, while consumption does not exceed 150 kW, at a load of 80%. The volume of digestate produced per year is 100,000 tonnes. In the regional context, innovative environmental technologies aimed at improving the quality of agricultural land have been introduced. An effective mechanism of spatial synergy with adaptation of this practice at most sugar factories through restructuring of production - creation of biogas production facilities on the basis of sugar factories - is proposed. As a long-term development perspective, the paper presents further creation of alcohol production facilities to use excess heat energy from mini-thermal power plants for the production of alcohol and bioethanol. Furthermore, this study confirms the non-linear effect of economic development; a significant result shows that the impact of green technology innovations on improving the quality of agricultural land (soil humus content, amount of mineral and organic fertilisers, pesticides, area of land under organic production, etc.) contributes to the increase in the level of regional economic development of the agricultural sector. The article clarifies the intermediary role of economic development of the agro-industrial complex. The results of the study implement the tasks of sustainable development, such as improving the environment through the innovation of green technologies and achieving regional synergy in green development.

Environmental Assessment of Pig Manure Treatment Systems through Life Cycle Assessment: A Mini-Review

The primary aim of this research was to evaluate and compare the environmental impacts, throughout the life cycle, of the main treatment systems employed by the industry, as well as to identify the processes that contribute most to these environmental impacts. To achieve this, a bibliographical search was conducted using the Web of Science Core Collection database platform, utilizing the keywords “life cycle assessment”, “pig”, “treatment”, and “manure” or “slurry”. The search was restricted to publications from the last five years (2019–2023), resulting in a total of 66 publications that were then analyzed according to the functional unit (FU) adopted. For the 10 publications whose FUs were expressed in tons or cubic meters of treated manure, a descriptive and quantitative analysis was carried out. It was found that anaerobic digestion has been the most widely used treatment technology for pig manure over the past five years, according to the LCA methodology. These systems, configured as biogas and biofertilizer production facilities, have proven to be environmentally friendly and could play a crucial role in the energy transition and decarbonization of the energy matrix.

Biogas as Alternative to Liquefied Petroleum Gas in Mauritania: An Integrated Future Approach for Energy Sustainability and Socio-Economic Development

The global shift from conventional energy sources to sustainable alternatives has garnered significant attention, driven by the promise of economic benefits and environmental sustainability. The current study rigorously investigated the economic advantages and sustainability achieved from the transition of households in Mauritania from liquefied petroleum gas (LPG) to biogas utilization. The study constitutes a robust case study that centers on assessing the multifaceted impacts of this transition on household finances and overall quality of life in Mauritania. This case focuses on biogas technology adoption and its role as a competitor of LPG in Mauritania. The energy poverty portfolio of the nation has been explored and livestock waste generation and biogas production potential have been estimated at 2451 million cubic meters annually. Biogas production can fulfill 50% of the energy requirement for cooking purposes within the country. The community scale fixed-dome-type biogas digesters have been recommended for Mauritania by considering a community of 100 families. The calculated payback period for the community project is 74 months, and after the payback period, continuous monthly benefits of USD 1750 will be started. Livestock manure is directly utilized for farming practices in Mauritania, which produces 10.7 Gg of methane emissions per year. Biogas production is a clean and economically viable option for Mauritania, which can also be beneficial for reducing the methane emissions footprints of the livestock sector. This case study will prove as a vital project for other African nations if successfully implemented. Multiple recommendations for the policy-makers of Mauritania have also been formulated, like tariffs on biogas production facilities and swift financing schemes, which can further strengthen the biogas production on a national scale. International funders should also take part in coping with the energy demand of Mauritania and its mission to mitigate climate change rather than utilizing LPG on a national scale. Biogas production and utilization are much cheaper compared with the fluctuating prices of LPG and ensure health when cooking.

Maximizing Biogas Yield Using an Optimized Stacking Ensemble Machine Learning Approach

Biogas is a renewable energy source that comes from biological waste. In the biogas generation process, various factors such as feedstock composition, digester volume, and environmental conditions are vital in ensuring promising production. Accurate prediction of biogas yield is crucial for improving biogas operation and increasing energy yield. The purpose of this research was to propose a novel approach to improve the accuracy in predicting biogas yield using the stacking ensemble machine learning approach. This approach integrates three machine learning algorithms: light gradient-boosting machine (LightGBM), categorical boosting (CatBoost), and an evolutionary strategy to attain high performance and accuracy. The proposed model was tested on environmental data collected from biogas production facilities. It employs optimum parameter selection and stacking ensembles and showed better accuracy and variability. A comparative analysis of the proposed model with others such as k-nearest neighbor (KNN), random forest (RF), and decision tree (DT) was performed. The study’s findings demonstrated that the proposed model outperformed the existing models, with a root-mean-square error (RMSE) of 0.004 and a mean absolute error (MAE) of 0.0024 for the accuracy metrics. In conclusion, an accurate predictive model cooperating with a fermentation control system can significantly increase biogas yield. The proposed approach stands as a pivotal step toward meeting the escalating global energy demands.

Utilization of Cow Rumen into Biogas Using a Fixed Dome Reactor as an Alternative Energy in Deli Serdang Regency

Biogas is renewable energy that can be used as substitute of LPG and generator fuel. The utilization of waste into biogas has been implemented in Tadukan Raga Village, Sinembah Tanjung Muda (STM) Hilir District, Deli Serdang Regency since 2018 by building a facility for processing biomass into biogas by utilize rumen waste and cow dung at pilot scale. This facility has been handed over by the Ministry of Environment and Forestry to the community to manage independently. However, there is a problem in the lack of understanding of the community in the management, development and maintenance of this facility. This problem resulted in the abandonment of the biogas plant so that production and operations not running and some equipment requiring repairs. The purpose of this program is to strengthen and empower observer groups and users of biogas production facilities in Tadukan Raga Village. Therefore it is necessary to carry out: an analysis of the sustainability of the biogas plant program and the use of biogas as an alternative to overcoming livestock manure pollution in the program of Desa Binaan USU 2022, repair of biogas reactor and piping and the use of biogas stoves modified from LPG stoves.

Ammonia Emission Estimation of Biogas Production Facilities in South Korea: Consideration of the Emission Factor Development

This study identified the need to develop ammonia (NH3) emission factors for biogas production facilities in Korea and examined the base unit that should be considered when developing emission factors. The analysis showed that the ammonia concentration of three biogas production facilities ranged from approximately 0.04 to 8 ppm. The NH3 emission factors were found to be 0.005 kg NH3 ton-waste and 0.150 kg NH3/10−3 Nm3-biogas. The estimated emission factors were also used to calculate the total emissions, which were found to be small. The uncertainty of the emission factors ranged from approximately −5% to +8% for the waste-based emission factors and approximately −5% to +7% for the biogas-based emission factors. Although the uncertainty of the emission factor differences is not large, it is low compared to the international emission factor uncertainty (maximum 191%, minimum −40.7%). Considering the development of waste-based and biogas-based emission factors, there is not much difference in terms of uncertainty of emission factors, so it is judged that it will be easier to develop emission factors based on biogas production in terms of securing and managing overall data.

GHG Savings Calculation: Switch from Electricity Production to Biomethane. Case Study

Carbon dioxide is one of the main components of greenhouse gases. The amount of anthropogenic CO2 emissions in the atmosphere reached 37.9 Gt, which is 60 % more than in 1990. The use of CO2 in the production of valuable products can help to reduce the amount of CO2 in the atmosphere. Biomethane fuel production could be a successful solution in Latvia as well. The work includes a case study of a Latvian biogas production facility Agro Iecava with a switch from biogas to biomethane production. All calculations are made according to REDcert rules. For biofuel production the Plant uses 13 types of substrates, which is also reflected in the calculation. The work shows a step-by-step algorithm for research and analysis. The experience can be used at other biogas production stations, regardless of its location. The analysis of the Plant shows that switching to biomethane production saves up to 80.34 % of GHG emissions (with an estimated loss during transportation in the network of 1 %). In the worst-case scenario, this amount is 76.34 % (loss from transportation is 5 %), which is also above the minimum indicated in the Renewable Energy Directive.

Ex-situ biological hydrogen methanation in trickle bed reactors: Integration into biogas production facilities

Biological hydrogen methanation (BHM) is a biocatalytic process for biogas upgrading. Integrating ex-situ BHM processes into biogas facilities has the advantage of using inoculum, CO2, and nutrients directly from anaerobic digestion (AD) processes to enhance CH4 productivity. This study investigated the potential of biowaste digestate as an inoculum and digested biowaste reject water as the trickling liquid and nutrient source in thermophilic trickle bed reactors (TBRs). Use of reject water improved H2 conversion efficiency to up to 99 %, thus achieving a H2 loading rate of 10.8 LH2 L Rv-1 d-1 at a gas retention time (GRT) of 1.8 h and CH4 productivity of 2.6 L LRv-1 d-1 implying that reject water contains macronutrients beneficial to enriching hydrogenotrophic methanogens. However, at high H2 loading rates, a trace element supply was necessary to stabilize process performance. Hydrogenotrophic methanogens Methanothermobacter and Methanobacterium were selectively enriched, mainly due to the increased H2 loading rate.

Calculation of Greenhouse Gas Savings: Switch from Electricity Production to Biomethane. Case Study

Abstract Greenhouse gases are mainly comprised of carbon dioxide. In 2021, anthropogenic CO2 emissions in the atmosphere have risen to 37.9 Gt, a 60 % increase from the levels observed in 1990. The production of high-value products using CO2 can contribute to decreasing atmospheric CO2 levels and advancing the objectives of the Green Deal. In Latvia, biofuel–biomethane production may also present a viable solution. Diversifying the energy sector, which can benefit the country's economy, is another advantage of this scenario. The study examines the transformation of a Latvian biogas production facility, which shifts towards producing biomethane as its final product. The study also involves the computation of greenhouse gas emission reductions resulting from utilizing biomethane instead of biogas in the network.

Development of a crossflow nanofiltration process for polishing of wastewater by-product from biogas production processes

The growing adoption of biogas production from source-separated organics (SSOs) has resulted in a need for advanced treatment processes for the resulting liquid waste by-products. While previous studies have demonstrated the potential of using nanofiltration (NF) membranes to polish the outlet stream of a membrane bioreactor (MBR) in municipal wastewater applications, there is little known about the performance of such membranes to treat the more complex multi-component streams that result from the processing of SSOs. In this study, crossflow filtration experiments with three commercial flat-sheet NF membranes (NFS, NFX, NF90) were run on two batches of MBR permeate (identified as Batch A and Batch B) which were sourced four months apart from a biogas production facility. For each batch, there was a remarkable difference in performance of the three NF membranes, where a clear trade-off between permeate quality and recovery was observed. For example, the NF90 membrane gave the best permeate quality but the lowest recovery. Interestingly, the NFS permeate COD for Batch B was approximately 60 % lower than that for Batch A; it is believed that this was due to differences in the amount of ammonia between the two batches. This work bridges a technical gap in the water-energy nexus by demonstrating the viability of using NF technology to polish liquid waste streams from biogas production processes, while also highlighting their susceptibility to variable feed conditions caused by upstream process deviations.

Feasibility for the introduction of decentralised combined heat and power plants in agricultural processes. A case study for the heating of algae cultivation ponds

The article analyzes the technical and economic feasibility of a biogas-fired Combined heat and power (CHP) plant used in the agricultural sector for the heating of algae cultivation ponds. Specific thresholds are set for typical Key Performance Indicators (KPIs): the cogeneration efficiency, the power-to-heat ratio and the Primary Energy Saving Ratio, which should be satisfied while maximizing the CHP unit’s annual electricity production. A new operation algorithm and a plant’s layout are formulated, with a water heat storage tank and a back-up heat production unit, examined alternatively with and without a biogas production facility, being the article’s main novelties. Alternative sizing scenarios are investigated, optimized versus economic indices. Payback periods close to 5 years are achieved for all investigating scenarios without the biogas production facility, while satisfying all KPIs’ thresholds. The high set-up cost of the biogas production facility affects negatively the investment’s efficiency. The electricity selling price from the CHP unit (higher than 0.12 €/kWh) and the biogas procurement price (lower than 0.046 €/kWhch) constitute critical parameters for the project’s economic viability. The proposed plant exhibits high technical and economic feasibility for similar agricultural applications, fostering the rational use of energy in this sector.

Regenerative One-Stage Catalytic Absorption Process with Cupric Ions for Removal of Reduced Sulfur Compounds in Polluted Air

Reduced volatile sulfur compounds emitted from e.g. livestock production and biogas production facilities contribute to general air pollution and local odor nuisance. Improved technologies are required to mitigate the emissions of both hydrogen sulfide and organic sulfur compounds. The present study examines the oxidative absorption of reduced sulfur compounds, i.e. hydrogen sulfide, methanethiol and dimethyl sulfide in a wet oxidation process with cupric chloride. It was found that this process efficiently removes both hydrogen sulfide and methanethiol with removal efficiencies >94% under all process conditions tested, while the removal of dimethyl sulfide was in the range 20-40%. The main products determined were dimethyl disulfide, dimethyl trisulfide and elemental sulfur. It was shown that the process was more efficient than the similar process with ferric ions and higher removal could be obtained with lower residence times. Furthermore, though employing cupric ion as metal catalysts results in the production of gaseous sulfur compounds, it is estimated that this process is efficient for deodorization due to the higher odor threshold values of the product compounds and the pH range is optimal for gas streams containing CO2.

Ground-based remote sensing of CH4 and N2O fluxes from a wastewater treatment plant and nearby biogas production with discoveries of unexpected sources.

This study is an attempt to assess CH4 and N2O emissions from all the treatment steps of a wastewater treatment plant (WWTP) in Sweden, serving 145000 persons, and an adjacent biogas production facility. We have used novel mid-IR ground-based remote sensing with a hyperspectral camera to visualize and quantify the emissions on 21 days during a year, with resulting yearly fluxes of 90.4±4.3 tonne CH4/yr and 10.9±1.3 tonne N2O/yr for the entire plant. The most highly emitting CH4 source was found to be sludge storage, which is seldom included in literature as in-situ methods are not suitable for measuring emissions extended over large surfaces, still contributing 90% to the total CH4 emission in our case. The dominating N2O source was found to be a Stable High rate Ammonia Removal Over Nitrite reactor, contributing 89% to the total N2O emissions. We also discovered several unexpected CH4 sources. Incomplete flaring of CH4 gave fluxes of at least 30kg CH4/min, corresponding to plume concentrations of 2.5%. Such highly episodic fluxes could double the plant-wide yearly emissions if they occur 2 days per year. From a distance of 250m we found a leak in the biogas production facility, corresponding to 1.1% of the CH4 produced, and that loading of organic material onto trucks from a biofertilizer storage tank contributed with high emissions during loading events. These results indicate that WWTP emissions globally may have been grossly underestimated and that it is essential to have effective methods that can measure all types of fluxes, and discover new potential sources, in order to make adequate priorities and to take effective actions to mitigate greenhouse gas emissions from WWTPs.

Optimisation of simple and regenerative organic Rankine cycles using jacket water of an internal combustion engine fuelled with biogas produced from agricultural waste

Internal combustion engines have a very important place in biogas production facilities to convert biogas energy to electricity. Unfortunately, although intense studies on improving internal combustion engine efficiencies by operational optimisation methods, serious progress is not achieved yet. However, there are many ways to improve the performance of these engines apart from structural optimisation methods. One of the most important ways is to utilize by integrating jacket water used to cool the biogas fuelled internal combustion engines into the new generation low-temperature heat recovery systems like organic Rankine cycles. In the present study, simple and regenerative organic Rankine cycles were optimised to improve the overall performance of an biogas fuelled internal combustion engine by using the jacket water which is released into the atmosphere after cooling the engine. Also, the energy, exergy and environmental aspect of these systems are evaluated. Finally, exergoeconomic analysis for both systems are conducted, and then payback periods of both systems are determined. As a result of the study, the maximum net power, thermal and exergy efficiencies of the simple organic Rankine cycle was calculated as 42.14 kW, 11.47 % and 63.27 % respectively, while the maximum net power, thermal and exergy efficiencies of the regenerative organic Rankine cycle are found as 45.3 kW, 12.34 % and 68.02 %. In addition, it is observed that the maximum power production obtained from the regenerative organic Rankine cycle corresponded to nearly 630 kg CO2/h emission reduction. The best payback period value is also calculated as 7.37 years in the simple organic Rankine cycle.

Valorisation of Agri- and Aquaculture Residues via Biogas Production for Enhanced Industrial Application

Climate changes are nowadays reality and affect all aspects of everyday life. One of the places where these changes influence the society the most is the Brazilian Ceará region and Jaguaribara basin that suffer long-lasting, devastating drought cycles. They have a dramatic negative impact on local economy, forcing change in business models. This work presents the valorisation of wastes and residues from local fish, prawns, and the vegetable-cultivation industry via biogas production forced to adapt to these new circumstances. Along a single year, as much as 189.74 tonnes of wastes and residues can be processed by the biogas production facility, producing as much as 94 GJ of cooling energy and 1 tonne of biofertiliser monthly. Even for such a small biogas production facility, the NPV is positive already after 11 years; its IRR is 6.2%, and accumulated ROI for 20 years of operation is as high as 77.8%. This work demonstrates that a valorisation of industrial wastes and residues via biogas production is a feasible solution for a specific industrial scenario addressing new socio-economic challenges for the particular enterprise.

Spatially Explicit Model for Anaerobic Co-Digestion Facilities Location and Pre-Dimensioning Considering Spatial Distribution of Resource Supply and Biogas Yield in Northwest Portugal

The high volumes of animal manure and sewage sludge, as a consequence of the development of intensive and specialized cattle dairy farms in peri-urban areas, pose challenges to local environmental quality and demands for systems innovation. Besides these negative impacts, energy recovery from biogas produced in anaerobic co-digestion processes should contribute to local sustainable development. This research considers technical data obtained from the optimization of biomethanization processes using sewage sludge and cattle manure liquid fraction, aiming to develop a spatially explicit model including multicriteria evaluation and an analytical hierarchy process to locate biogas production facilities, allocate energy resources and consider biogas unit pre-dimensioning analysis. According to the biophysical conditions and socioeconomic dynamics of the study area (Vila do Conde, Northwest Portugal), a spatially explicit model using multicriteria and multiobjective techniques allowed the definition of suitable locations, as well as the allocation of resources and support pre-dimensioning of biogas facilities. A p-median model allowed us to allocate resources and pre-dimensioning biogas facilities according to distance and accessibility elements. The results indicate: (i) the location of areas with adequate environmental conditions and socioeconomic suitability advantages to install biogas production facilities, and (ii) the ability to compare the options of centralized or distributed location alternatives and associated pre-dimensioning.

An environmentally friendly carton adhesive from acidic hydrolysis of waste potato starch

In food industries, especially in factories producing potato chips, large quantities of wastes can be generated that can harm aqueous environments. Before the potato chips are produced, at stages such as cutting and slicing the potato, the potato starches from the blade pass into the aqueous medium. The starch in this aqueous medium can be recycled by centrifuging or decanting before discharging. Otherwise, producing energy by sending it to biogas production facilities is a common method. The industrial starch obtained in this way is referred to as a by-product or waste. Thus, these waste starches, which are renewable, low-cost, multi-functional, biodegradable and nontoxic, can be used in different industries by changing their properties with some physicochemical or chemical methods and can be brought into the economy as cardboard adhesive. The aim of this study was to obtain an environmentally friendly cardboard adhesive from the modification of waste potato starch (WPS) by hydrolysis. WPS was homogenized in different amounts of deionized water and isopropyl alcohol (IPA) mixtures (0–135 mL). Subsequently, the mixtures were hydrolyzed by 25 mL of HCl or H2SO4 at different concentrations (0.25–1.25 M). The structure of the modified potato starch (MWPS) was determined by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD), the surface morphology by scanning electron microscope (SEM), the thermal behavior by thermogravimetric (TGA) analysis, and the viscosity by Brookfield viscosimeter. The adhesive property of the MWPS samples was determined as a tensile strength on a “dog-bone shape” cardboards by texture analyzer. The molecular weight profiles of the starch samples were determined by gel permeation chromatography (GPC) and the effect on the mechanical properties of starch was investigated. The molecular weight of starches was obviously decreased by acid hydrolysis. The observed peaks in the FT-IR spectrum were similar in the WPS and MWPS samples, and not affected by the type and concentration of the IPA or acids. In the SEM images, the granules surface of the MWPSs became shrunken and even fractured with the recessed surfaces. As the acid hydrolysis increases, the diffraction of crystalline peaks, and the thermal stability and degradation temperatures decreased. The viscosity significantly decreased with the increasing of the acid concentration. The best adhesive was obtained from the hydrolysis of 0.50 M HCl (25 mL) in 135 mL of water with the strength of 10.90 MPa.

Statistical analysis of trace contaminants measured in biogas

Biogas is a renewable energy fuel that can be treated to increase purity so that the resulting “biomethane” can be injected into the natural gas pipeline grid. The trace contaminants in biogas and biomethane make up a small fraction of the total gas but they still have the potential to cause adverse health effects and pipeline corrosion. This study investigates the statistical distributions of 17 trace metals, six mercaptans, hydrogen sulfide, ammonia, and six additional trace organic compounds. Twelve of these 31 trace contaminants have been previously identified as constituents of concern based on their toxicity profiles and through health risk assessment studies. Untreated and treated samples of biogas were collected from 12 different biogas production facilities using diverse feedstocks throughout California. Results show that most biogas trace contaminants follow a single log-normal distribution or a bi-modal lognormal distribution depending on the type of production facility. Treatment of biogas demonstrates some removal for all trace contaminants, but four constituents of concern (copper, lead, hydrogen sulfide, and methyl mercaptan) are predicted to have a >1% probability of exceeding trigger levels even after common treatments. This finding suggests that enhanced monitoring may be warranted for these contaminants. Several trace metals and volatile organic compounds (VOCs) were found to have seasonal trends with greater concentrations in the summer and lower concentrations in the winter suggesting that seasonal variation should be considered in future monitoring plans.

Performance analysis of membrane separation for upgrading biogas to biomethane at small scale production sites

A small-scale, transportable membrane upgrading system designed to purify biogas was tested at two food waste digesters and one dairy digester. The system had a rated capacity of 100 Nm3 h−1 raw biogas making it suitable for the many small-scale biogas production facilities being developed across California. The membrane removed a majority of the carbon dioxide from the biogas with performance matching expected targets. The membrane system also removed trace levels of aldehydes, ketones, siloxanes, halocarbons, and sulfur-containing compounds from the biogas, mainly because the pre-cleaning steps removed these contaminants from the gas stream. The average composition of upgraded biomethane produced by the membrane system satisfied the trace contaminant requirements for pipeline injection in California. Residual air in the biogas was not removed efficiently by the membrane system which prevented methane concentrations from reaching levels sufficient to meet the heating value requirements for pipeline injection. Dedicated upgrading plants could carefully eliminate air leakage to address this issue, and/or mix propane into the biomethane to achieve the target heating value. An economic model developed for small scale biogas production facilities predicted that capital costs for a typical small-scale membrane separation plant exceed $2.46 million and projects only become financially viable over a 15 year return period when natural gas prices exceed $21.92 GJ−1. Current market prices for petroleum natural gas are far below this level, and so financial incentives will be required to make small-scale biogas projects using membrane separation technology viable in the near term.

An integrated solution with SWARA&COPRAS methods in renewable energy production: City selection for biogas facility

In today's world, where the demand for energy has increased and the supply/demand balance for energy has become increasingly difficult, the role of renewable energy is quite important. One of the most important sources of renewable energy in the world is the biogas, which offers great contributions to prevent environmental pollution and ensure ecological balance. Because Turkey has the necessary resources for the production of biogas, it is a popular country for the establishment of biogas production facility, which has a great importance from renewable energy sources. The aim of this study is appropriate city selection for a new biogas facility which will be an alternative to already existing biogas production facilities in Turkey. The study focuses on the identification of renewable energy potentials by evaluating 3 cities with rich and diverse characteristics in terms of biomass quantity. In this paper, a model with 12 criteria which affects the evaluation of the alternatives is proposed for selecting the suitable city in Turkey for biogas production with proposed solution method. In proposed methodology, the SWARA method, which uses the ranking of each decision maker, is used in the first phase of the solution in which the importance weights of the criteria in the model are determined. After obtaining criteria weights with SWARA method, for selecting appropriate city to establish a biogas facility, COPRAS method is used that is a one of multi criteria decision making method. The proposed model is showed by an illustrative example and the results are explained.