High-solid anaerobic digestion of sewage sludge under mesophilic conditions: Feasibility study

2012 ◽  
Vol 104 ◽  
pp. 150-156 ◽  
Author(s):  
Nina Duan ◽  
Bin Dong ◽  
Bing Wu ◽  
Xiaohu Dai
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Feasibility Study ◽  
High Solid ◽  
Mesophilic Conditions

High-solid anaerobic digestion of sewage sludge: challenges and opportunities

2020 ◽  
Vol 278 ◽  
pp. 115608 ◽  
Author(s):  
Francesco Di Capua ◽  
Danilo Spasiano ◽  
Andrea Giordano ◽  
Fabrizio Adani ◽  
Umberto Fratino ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
High Solid ◽  
Challenges And Opportunities

High-solids anaerobic digestion of cassava pulp in semi-continuous bioreactors

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 6723-6736
Author(s):  
Wei Zhao ◽  
Chen-Yu Zhou ◽  
Jun Zhang ◽  
Dun-Qiu Wang
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
High Solids ◽  
Total Solids ◽  
Loading Rates ◽  
Cassava Pulp ◽  
Volatile Solids ◽  
Organic Matter Loading ◽  
Mesophilic Conditions

The effects of two total solids contents (TS) and two inocula were studied for the semi-continuous high-solids anaerobic digestion (HS-AD) of cassava pulp under mesophilic conditions (35 ± 2 °C). In the 1.0-L bioreactors, two TS of 15% and 20% with digestate as a sole inoculum were chosen to run the HS-AD, and two inocula (the digestate from the AD of cassava pulp and sewage sludge) were used separately under TS 20%. All treatments were carried out at the organic matter loading rates (OLRs) of from 3.0 to 10.0 kg volatile solids (VS)/(m3·d), with each phase of 6 days followed by two 3-days phases of no feeding and then low OLR of 6.5 kg VS/(m3·d). Compared with TS 15%, the bioreactors of TS 20% with the digestate had a higher buffering capability to alleviate the rapid acidification and a higher level of the specific methane yields (SMYs) of from 0.212 to 0.233 m3/(kgVSadded) at the OLRs of 4.0 to 6.5 kgVS/(m3·d), while TS 15% obtained the highest SMY of from 0.152 to 0.182 m3/(kgVSadded) at the OLR of 4.0, 6.5, and 8.0 kgVS/(m3·d). In contrast, sewage sludge did not restrain the rapid acidification and only yielded quite small SMYs under TS 20%.

Determination of the optimal rate for the microaerobic treatment of several H2S concentrations in biogas from sludge digesters

2011 ◽  
Vol 64 (1) ◽  
pp. 233-238 ◽  
Author(s):  
I. Díaz ◽  
A. C. Lopes ◽  
S. I. Pérez ◽  
M. Fdz-Polanco
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Working Volume ◽  
Pilot Plant Scale ◽  
O2 Supply ◽  
Microaerobic Conditions ◽  
Mesophilic Conditions

The treatment of H2S in the biogas produced during anaerobic digestion has to be carried out to ensure the efficient long-lasting use of its energetic potential. The microaerobic removal of H2S was studied to determine the treatment capacity at low and high H2S concentrations in the biogas (0.33 and 3.38% v/v) and to determine the optimal O2 rate that achieved a concentration of H2S of 150 mg/Nm3 or lower. Research was performed in pilot-plant scale digesters of sewage sludge, with 200 L of working volume, in mesophilic conditions with a hydraulic retention time of 20 d. O2 was supplied at different rates to the headspace of the digester to create the microaerobic conditions. The treatment successfully removed H2S from the biogas with efficacies of 97% for the low concentration and 99% for the highest, in both cases achieving a concentration below 150 mg/Nm3. An optimal O2 rate of 6.4 NLO2/Nm3 of biogas when treating the biogas was found with 0.33% (v/v) of H2S and 118 NLO2/Nm3 of biogas for the 3.38% (v/v) concentration. This relation may be employed to control the H2S content in the biogas while optimising the O2 supply.

Comparative performance of mesophilic and thermophilic anaerobic digestion for high-solid sewage sludge

2013 ◽  
Vol 149 ◽  
pp. 177-183 ◽  
Author(s):  
Taira Hidaka ◽  
Feng Wang ◽  
Taketo Togari ◽  
Tsutomu Uchida ◽  
Yutaka Suzuki
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Comparative Performance ◽  
High Solid ◽  
Thermophilic Anaerobic Digestion

scholarly journals Anaerobic Digestion of Sewage Sludge with High Solid Content and Its Use as Fertilizer

2015 ◽  
Vol 13 (5) ◽  
pp. 349-358 ◽  
Author(s):  
Taira HIDAKA ◽  
Hiromichi SAWAHARA ◽  
Taketo TOGARI ◽  
Jun TSUMORI
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Solid Content ◽  
High Solid Content ◽  
High Solid
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