Thermophilic Anaerobic Digestion of Solid Waste for Fuel Gas Production

1975 ◽  
Vol 17 (8) ◽  
pp. 1119-1135 ◽  
Author(s):  
Charles L. Cooney ◽  
Donald L. Wise
Keyword(s):  
Anaerobic Digestion ◽  
Solid Waste ◽  
Gas Production ◽  
Fuel Gas ◽  
Thermophilic Anaerobic Digestion

Rheology of sludge from double phase anaerobic digestion of organic fraction of municipal solid waste

2000 ◽  
Vol 41 (3) ◽  
pp. 51-59 ◽  
Author(s):  
P. Battistoni ◽  
P. Pavan ◽  
J. Mata-Alvarez ◽  
M. Prisciandaro ◽  
F. Cecchi
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Pilot Scale ◽  
Gas Production ◽  
Organic Loading Rate ◽  
Second Phase ◽  
Organic Fraction ◽  
Double Phase ◽  
Long Term Experiment

In this paper experimental results on the anaerobic digestion of sewage sludge and organic fraction of municipal solid waste (OFMSW) by using a double phase process are reported. The long-term experiment has been carried out on a pilot scale plant, performed in different sets of operative conditions, during which granulometric distributions of particles in sludges and rheological properties of sludges were monitored. A significant fluidification of sludge was evidenced in the meso-thermo process, especially taking into account the variation in sludge behaviour from the first to the second phase. In the thermo-thermo process a fluidification higher than that shown in meso-thermo conditions is not observed, this suggesting that better results in terms of sludge conditioning can be obtained in a long time spent in thermophilic anaerobic digestion. Total volatile solids (TVS) and total fixed solids (TFS) become the most important parameters when mathematical modelling is applied to these processes.In the acidogenic phase, hydraulic retention time (HRT) and temperature are used to determine rigidity coefficient (RC), while only temperature is needed for yield stress (YC). Organic loading rate (OLR) and specific gas production (SGP) exert an important role in methanogenic phase description.

scholarly journals Numerical Comparison of a Combined Hydrothermal Carbonization and Anaerobic Digestion System with Direct Combustion of Biomass for Power Production

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 43 ◽  
Author(s):  
Mohammad Heidari ◽  
Shakirudeen Salaudeen ◽  
Omid Norouzi ◽  
Bishnu Acharya ◽  
Animesh Dutta
Keyword(s):  
Anaerobic Digestion ◽  
Rankine Cycle ◽  
Hydrothermal Carbonization ◽  
Gas Production ◽  
Numerical Comparison ◽  
Fuel Gas ◽  
Operational Conditions ◽  
Unit Process ◽  
Direct Combustion ◽  
Balance Analysis

Two of the methods for converting biomass to fuel are hydrothermal carbonization (HTC) and anaerobic digestion (AD). This study is aimed at designing and analyzing two scenarios for bioenergy production from undervalued biomass (sawdust). In one of the scenarios (direct combustion or DC), raw biomass is burned in a combustor to provide the heat that is required by the Rankine cycle to generate electricity. In the other scenario (HTC-AD), the raw biomass first undergoes HTC treatment. While the solid product (hydrochar) is used to produce power by a Rankine cycle, the liquid by-product undergoes an AD process. This results in fuel gas production and it can be used in a Brayton cycle to generate more power. Energy and mass balance analysis of both scenarios were developed for each unit process by using Engineering Equation Solver (EES). The required data were obtained experimentally or from the literature. The performances of the proposed systems were evaluated, and a sensitivity analysis was presented to help in finding the best operational conditions.

Composting of municipal solid waste and sewage sludge: Potential for fuel gas production in a developing country

1996 ◽  
Vol 16 (1-4) ◽  
pp. 265-279 ◽  
Author(s):  
Don Augenstein ◽  
Donald L. Wise ◽  
Nghiem Xuan Dat ◽  
Nguyen Duc Khien
Keyword(s):  
Sewage Sludge ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Developing Country ◽  
Gas Production ◽  
Fuel Gas

Pretreatment followed by anaerobic digestion of secondary sludge for reduction of sewage sludge volume

2013 ◽  
Vol 67 (11) ◽  
pp. 2527-2533 ◽  
Author(s):  
Naoki Abe ◽  
Yue-Qin Tang ◽  
Makoto Iwamura ◽  
Shigeru Morimura ◽  
Kenji Kida
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Thermal Treatment ◽  
Low Pressure ◽  
Gas Production ◽  
Wet Oxidation ◽  
Thermophilic Anaerobic Digestion ◽  
Sludge Pretreatment ◽  
Secondary Sludge ◽  
Digestion Efficiency

The influence of two pretreatment methods, thermal treatment and low-pressure wet oxidation, on the sludge digestion efficiency was examined. Batch thermophilic anaerobic digestion was used to evaluate the effectiveness of the pretreatment methods in terms of volatile suspended solids (VSS) digestion efficiency and gas production. The results showed that the gas production was not proportional to the VSS degradation efficiency of either thermal treatment or low-pressure wet oxidation. Low-pressure wet oxidation treatment at 150 °C along with 40% of the theoretical oxygen required to oxidize organic carbon gave the highest gas production and the VSS digestion efficiency of 77% at a VSS loading rate of 8 g l−1 d−1. The digestion efficiency was about 30% higher than that of thermophilic anaerobic digestion without sludge pretreatment. Sewage sludge could be treated effectively at a high VSS digestion efficiency with this pretreatment followed by thermophilic anaerobic digestion.

scholarly journals The Start-up of Thermophilic Anaerobic Digestion of Municipal Solid Waste

2016 ◽  
Vol 95 (8) ◽  
pp. 645-647 ◽  
Author(s):  
Subaru NAKAJIMA ◽  
Naoto SHIMIZU ◽  
Hiroyuki ISHIWATA ◽  
Tadahiko ITO
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Thermophilic Anaerobic Digestion ◽  
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