Estimating Sludge Deposition on the Heat Exchanger in the Digester of a Biogas Plant DOI Open Access
Tomasz Janusz Teleszewski, Leszek Hożejowski

Sustainability, Journal Year: 2024, Volume and Issue: 16(18), P. 7981 - 7981

Published: Sept. 12, 2024

The presented research addresses a problem occurring in biogas plant, which we know plays an important role sustainable development. sludge deposited on the walls of digester’s heat exchanger impairs transfer to substrate. It leads temperature drop inside plant and threatens its correct operation. thickness layer cannot be directly measured when is operating. Therefore, aim this work was develop then validate method for estimating, based operating parameters exchanger, give theoretical foundations designing automatic monitoring system. Two mathematical models (and methods) were developed: one- two-dimensional. former model solved analytically while latter by Trefftz method. numerical results from these two approaches showed very good agreement with each other actual measurement taken after removing substrate fermentation chamber. According calculation results, growth linear time, rate 0.0064 mm per day. Finally, schematic diagram intended system proposed. could optimize operation thus become step towards more energy production.

Language: Английский

Evaluation of pig farming residue as substrate for biomethane production via anaerobic digestion DOI Creative Commons
Jurek Häner, Alexej Neradko, Sören Weinrich

et al.

Biomass Conversion and Biorefinery, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Abstract Livestock farming and manure management contribute substantially to greenhouse gas (GHG) emissions in agriculture. Anaerobic digestion (AD) of is a promising strategy for mitigating these emissions. This study aimed assess the biomethane potential (BMP) various types pig slurry, investigate factors that influence production, analyze degradation kinetics, propose AD process optimization approaches. Thus, substrate analysis, BMP tests batch assays, kinetic modeling, principal component analysis (PCA) were conducted. In order further quantify effects different qualities full-scale operation, production was simulated under steady-state conditions. Results indicated piglet slurry had highest volatile solids (VS)–specific (203 ± 72 L kg −1 VS), followed by mixed (202 132 fattening (117 56 sow (86 17 VS). The PCA revealed significant roles VS, crude fat, fatty acids concentration, carbon/nitrogen ratio achieving high BMPs. First-order two-step modeling identified hydrolysis as rate-limiting step, showing determinant step < 0 each sample. simulation continuous operation notable differences daily (36.7–42.7 day ) between slurries at same hydraulic retention time BMP. research underscores variability characteristics, exemplified total range 1.4–12.1%, provides crucial insights optimizing processes livestock waste management.

Language: Английский

Citations

0
Life Cycle Assessment of Pig Production in Central Portugal: Environmental Impacts and Sustainability Challenges DOI Open Access
L. C. R. dos Santos, Miguel Ferreira, Idalina Domingos

et al.

Sustainability, Journal Year: 2025, Volume and Issue: 17(2), P. 426 - 426

Published: Jan. 8, 2025

Pig farming plays a crucial socioeconomic role in the European Union, which is one of largest pork exporters world. In Portugal, pig key regional development and national economy. To ensure future sustainability minimize environmental impacts, it essential to identify most deleterious production activities. This study carried out life cycle assessment (LCA) using conventional system central Portugal unitary processes with greatest impact problems. LCA followed ISO 14040/14044 standards, covering entire cycle, from feed manufacturing waste management, 1 kg live weight as functional unit. The slurry produced used fertilizer agriculture, replacing synthetic chemical fertilizers. Results show that production, raising piglets, fattening pigs are impactful phases cycle. Fodder stage impact, accounting for approximately 60% 70% categories analyzed cases. highest impacts were freshwater ecotoxicity, human carcinogenic toxicity, marine ecotoxicity; significant observed health, an estimated effect around 0.00045 habitants equivalent (Hab.eq) after normalization. use more sustainable ingredients optimization efficiency effective strategies promoting sector.

Language: Английский

Citations

0
Phytomanagement of Cadmium using Tagetes erecta in Greenhouse and Field Conditions DOI Creative Commons
Weeradej Meeinkuirt, Theerawut Phusantisampan, Jittawan Kubola

et al.

Journal of Hazardous Materials Advances, Journal Year: 2024, Volume and Issue: unknown, P. 100481 - 100481

Published: Sept. 1, 2024

Language: Английский

Citations

2
Scaling sustainable pig manure treatment: Life cycle assessments for small to large piggeries in China DOI

Aimin Ji,

Hongyan Guo,

Ningzhou Li

et al.

Sustainable Production and Consumption, Journal Year: 2024, Volume and Issue: 52, P. 166 - 178

Published: Nov. 1, 2024

Language: Английский

Citations

2
Estimating Sludge Deposition on the Heat Exchanger in the Digester of a Biogas Plant DOI Open Access
Tomasz Janusz Teleszewski, Leszek Hożejowski

Sustainability, Journal Year: 2024, Volume and Issue: 16(18), P. 7981 - 7981

Published: Sept. 12, 2024

The presented research addresses a problem occurring in biogas plant, which we know plays an important role sustainable development. sludge deposited on the walls of digester’s heat exchanger impairs transfer to substrate. It leads temperature drop inside plant and threatens its correct operation. thickness layer cannot be directly measured when is operating. Therefore, aim this work was develop then validate method for estimating, based operating parameters exchanger, give theoretical foundations designing automatic monitoring system. Two mathematical models (and methods) were developed: one- two-dimensional. former model solved analytically while latter by Trefftz method. numerical results from these two approaches showed very good agreement with each other actual measurement taken after removing substrate fermentation chamber. According calculation results, growth linear time, rate 0.0064 mm per day. Finally, schematic diagram intended system proposed. could optimize operation thus become step towards more energy production.

Language: Английский

Citations

1