The kinetics of biogas production in co-digestion of sewage sludge and agro-industrial wastes

Aim. To optimize the methane digestion process while using different recipes of substrate components of ag- ricultural origin. Methods. The chemical composition of separate components of the substrate of agricultural by-products, industrial wastes, fats of the agrorefi nery and corn silage was studied. Dry (organic) mass, crude protein (fat) fi ber, loose ash, nitrogen-free exhaust were estimated in the components and the productivity of biogas was determined along with the methane content. These data were used as a basis for daily recipes of the substrate and the analysis of biogas production at the biogas station in Kostkowice. Results. The application of by-products of agricultural production solves the problem of their storage on boards and in open containers, which reduces investment costs, related to the installation of units for their storage. Conclusions. The return on investment for obtaining electric energy out of agricultural biogas depends considerably on the kind of the substrate used and on technological and market conditions.

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Co-Management of Sewage Sludge and Other Organic Wastes: A Scandinavian Case Study

Energies ◽

10.3390/en14123411 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3411

Author(s):

Clara Fernando-Foncillas ◽

Maria M. Estevez ◽

Hinrich Uellendahl ◽

Cristiano Varrone

Keyword(s):

Anaerobic Digestion ◽

Sewage Sludge ◽

Resource Recovery ◽

Organic Wastes ◽

Industrial Wastes ◽

Wastewater Management ◽

Sewage Sludge Management ◽

The Common ◽

Green Chemicals

Wastewater and sewage sludge contain organic matter that can be valorized through conversion into energy and/or green chemicals. Moreover, resource recovery from these wastes has become the new focus of wastewater management, to develop more sustainable processes in a circular economy approach. The aim of this review was to analyze current sewage sludge management systems in Scandinavia with respect to resource recovery, in combination with other organic wastes. As anaerobic digestion (AD) was found to be the common sludge treatment approach in Scandinavia, different available organic municipal and industrial wastes were identified and compared, to evaluate the potential for expanding the resource recovery by anaerobic co-digestion. Additionally, a full-scale case study of co-digestion, as strategy for optimization of the anaerobic digestion treatment, was presented for each country, together with advanced biorefinery approaches to wastewater treatment and resource recovery.

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The effect of substrate ratio and total solids on biogas production from anaerobic co-digestion of municipal solid waste and sewage sludge

Journal of Material Cycles and Waste Management ◽

10.1007/s10163-021-01264-x ◽

2021 ◽

Author(s):

Mansour Ahmadi-Pirlou ◽

Tarahom Mesri Gundoshmian

Keyword(s):

Sewage Sludge ◽

Municipal Solid Waste ◽

Solid Waste ◽

Biogas Production ◽

Total Solids ◽

Substrate Ratio

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Sewage sludge and solid residues from biogas production derived biochar as an effective bio-waste adsorbent of fulvic acids from water or wastewater

Chemosphere ◽

10.1016/j.chemosphere.2021.130447 ◽

2021 ◽

pp. 130447

Author(s):

Magdalena Kończak ◽

Anna Siatecka ◽

Michael A. Nazarkovsky ◽

Bożena Czech ◽

Patryk Oleszczuk

Keyword(s):

Sewage Sludge ◽

Biogas Production ◽

Fulvic Acids

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Biogas potential of organic waste onboard cruise ships — a yet untapped energy source

Biomass Conversion and Biorefinery ◽

10.1007/s13399-020-01249-0 ◽

2021 ◽

Author(s):

Kai Schumüller ◽

Dirk Weichgrebe ◽

Stephan Köster

Keyword(s):

Energy Source ◽

Anaerobic Digestion ◽

Sewage Sludge ◽

Food Waste ◽

Energy Demand ◽

Organic Waste ◽

Biogas Production ◽

Biogas Yield ◽

Cruise Ships ◽

Detailed Presentation

AbstractTo tap the organic waste generated onboard cruise ships is a very promising approach to reduce their adverse impact on the maritime environment. Biogas produced by means of onboard anaerobic digestion offers a complementary energy source for ships’ operation. This report comprises a detailed presentation of the results gained from comprehensive investigations on the gas yield from onboard substrates such as food waste, sewage sludge and screening solids. Each person onboard generates a total average of about 9 kg of organic waste per day. The performed analyses of substrates and anaerobic digestion tests revealed an accumulated methane yield of around 159 L per person per day. The anaerobic co-digestion of sewage sludge and food waste (50:50 VS) emerged as particularly effective and led to an increased biogas yield by 24%, compared to the mono-fermentation. In the best case, onboard biogas production can provide an energetic output of 82 W/P, on average covering 3.3 to 4.1% of the total energy demand of a cruise ship.

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Empirical Validation of a Biogas Plant Simulation Model and Analysis of Biogas Upgrading Potentials

Energies ◽

10.3390/en14092424 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2424

Author(s):

Jan Martin Zepter ◽

Jan Engelhardt ◽

Tatiana Gabderakhmanova ◽

Mattia Marinelli

Keyword(s):

Simulation Model ◽

Biogas Production ◽

Biogas Plant ◽

Raw Material ◽

Biogas Upgrading ◽

Integrated Energy Systems ◽

First Order Kinetics ◽

Biogas Plants ◽

Plant Simulation ◽

Kinetics Of

Biogas plants may support the transformation towards renewable-based and integrated energy systems by providing dispatchable co-generation as well as opportunities for biogas upgrading or power-to-X conversion. In this paper, a simulation model that comprises the main dynamics of the internal processes of a biogas plant is developed. Based on first-order kinetics of the anaerobic digestion process, the biogas production of an input feeding schedule of raw material can be estimated. The output of the plant in terms of electrical and thermal energy is validated against empirical data from a 3-MW biogas plant on the Danish island of Bornholm. The results show that the model provides an accurate representation of the processes within a biogas plant. The paper further provides insights on the functioning of the biogas plant on Bornholm as well as discusses upgrading potentials of biogas to biomethane at the plant from an energy perspective.

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