Analysis of the stability of high-solids anaerobic digestion of agro-industrial waste and sewage sludge

2013 ◽  
Vol 144 ◽  
pp. 107-114 ◽  
Author(s):  
E. Aymerich ◽  
M. Esteban-Gutiérrez ◽  
L. Sancho
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Industrial Waste ◽  
High Solids ◽  
The Stability

Process performance of high-solids batch anaerobic digestion of sewage sludge

2014 ◽  
Vol 35 (21) ◽  
pp. 2652-2659 ◽  
Author(s):  
Xiaocong Liao ◽  
Huan Li ◽  
Yingchao Cheng ◽  
Nan Chen ◽  
Chenchen Li ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Process Performance ◽  
High Solids

High-Solids Anaerobic Digestion of Mixed Municipal and Industrial Waste

1997 ◽  
Vol 123 (11) ◽  
pp. 1087-1092 ◽  
Author(s):  
Jan A. Oleszkiewicz ◽  
Hector M. Poggi-Varaldo
Keyword(s):  
Anaerobic Digestion ◽  
Industrial Waste ◽  
High Solids

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%.

Enhancement of Sewage Sludge Anaerobic Digestibility by Sulfate Radical Pretreatment

2012 ◽  
Vol 518-523 ◽  
pp. 3358-3362 ◽  
Author(s):  
De Dong Sun ◽  
Hua Mei Liang ◽  
Chun Ma
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Removal Rate ◽  
Gas Production ◽  
Sulfate Radical ◽  
Methane Yield ◽  
Control Group ◽  
Pretreatment Condition ◽  
The Stability ◽  
Anaerobic Digestibility

The effect of sulfate radical(SO4−•) pretreatment on mesophilic anaerobic digestion of sewage sludge was investigated and compared with a control group. The results showed that pretreatment can effectively improve sludge anaerobic digestion performance. After sulfate radical pretreatment, the removal rate of TCOD during the digestion was increased by 11.5% , the cumulative gas production was increased by 44.9%.The VFA concentration increased in the supernatant after pretreatment, but the alkalinity was also increased at the same time, so as to ensure the stability of whole system. The highest methane yield under pretreatment condition was 0.27m3 CH4/kgVSremoval, 180.0% of the control. The results indicated that persulfate /K2S2O8 pretreatment could be an effective method for improving methane yield.

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