Assessment of solid retention time of a temperature phased anaerobic digestion system on performance and final sludge characteristics

2012 ◽  
Vol 87 (8) ◽  
pp. 1074-1082 ◽  
Author(s):  
V. Riau ◽  
M.A. De la Rubia ◽  
M. Pérez
Keyword(s):  
Anaerobic Digestion ◽  
Retention Time ◽  
Solid Retention Time ◽  
Sludge Characteristics

scholarly journals Modeling Of Dark Fermentation Process For Volatile Fatty Acids Production

2021 ◽  
Author(s):  
Raman Sharma
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Retention Time ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Fermentation Process ◽  
Volatile Fatty Acids ◽  
Solid Retention Time ◽  
Steady State Model ◽  
Complex Organic

This study examined the fermentation process for the production of volatile fatty acids from the organic waste. The depletion of fossil fuels motivated researchers to search for alternative energy and fuels instead of relying on the non-renewable way of energy and fuel production. Anaerobic digestion is a biochemical process in the absence of oxygen, where complex organic matter are degraded. The different stages of anaerobic digestion and important operating parameters such as pH, temperature and retention time. The most suitable feedstock and its effects on the treatment process are discussed. This study evaluates the modelling of VFAs production. The paper also demonstrates various model like ADM1, surface limiting model, and steady-state model. Furthermore, an experimental setup consisting of two semi-continuous reactors was employed for the sample analysis. The reactors were fed with raw and pre-treated source separated organics with solid retention time of 3 days. Keywords: Anaerobic digestion, Feedstocks, SSO, VFAs, ADM1

scholarly journals Modeling Of Dark Fermentation Process For Volatile Fatty Acids Production

2021 ◽  
Author(s):  
Raman Sharma
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Retention Time ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Fermentation Process ◽  
Volatile Fatty Acids ◽  
Solid Retention Time ◽  
Steady State Model ◽  
Complex Organic

This study examined the fermentation process for the production of volatile fatty acids from the organic waste. The depletion of fossil fuels motivated researchers to search for alternative energy and fuels instead of relying on the non-renewable way of energy and fuel production. Anaerobic digestion is a biochemical process in the absence of oxygen, where complex organic matter are degraded. The different stages of anaerobic digestion and important operating parameters such as pH, temperature and retention time. The most suitable feedstock and its effects on the treatment process are discussed. This study evaluates the modelling of VFAs production. The paper also demonstrates various model like ADM1, surface limiting model, and steady-state model. Furthermore, an experimental setup consisting of two semi-continuous reactors was employed for the sample analysis. The reactors were fed with raw and pre-treated source separated organics with solid retention time of 3 days. Keywords: Anaerobic digestion, Feedstocks, SSO, VFAs, ADM1

Production of High Calorific Biogas from Organic Wastewater and Enhancement of Anaerobic Digestion

2012 ◽  
Vol 550-553 ◽  
pp. 522-528 ◽  
Author(s):  
Yan Qiu Nie ◽  
Yu Xiu Li ◽  
Hui He ◽  
Wen Jing Zhou ◽  
Zhao Hui Pang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Retention Time ◽  
Biogas Production ◽  
Calorific Value ◽  
Optimal Dose ◽  
Organic Loading Rate ◽  
Solid Retention Time ◽  
Step Process ◽  
Biogas Purification ◽  
Organic Wastewater

Anaerobic digestion is a widely applied technology to produce biogas from organic wastewater. The biogas calorific value depends on the methane-content. For biogas flows >100 m3/h, the two-step process is usually used for production of high calorific biogas from organic wastewater: the first step, anaerobic digestion; the second step, biogas purification. However, for biogas flows 3/h, biogas purification is not economical, and one-step process according to the big gap between methane and non-methane-gas in solubility at higher pressure or lower temperature, should be condidered. New anaerobic digestion processes, such as micro-aerobic process, electrolysis enhancing methane production process, process of internal circulation anaerobic digester (ICAD) with sewage source heat pump, may all enhance biogas producton or lower biogas production cost. In addition, suitable environmental conditions, such as organic loading rate (OLR), solid retention time (SRT), hydraulic retention time (HRT) and surface area, are all beneficial to enhance methane fermentation. Furthermore, new operation modes and optimal dose of trace metals might be selected.

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