The influence of sludge concentration on its thermophilic anaerobic digestion performance based on low temperature thermal hydrolysis pretreatment.

Content Provider	Semantic Scholar
Author	Huang, Ying Feng
Copyright Year	2016
Abstract	Abstract The dewatered sludge with TS of 14.62% was diluted to 4 different concentrations of sludge (TS: 6%, 8%, 9%, 12%) and were pretreated at 90°C for thermal hydrolysis. The performance of thermophilic anaerobic digestion was evaluated with the removal efficiencies of SS, VSS and biochemical methane potential (BMP) experiments were also carried out at (55±1)°C to investigate cumulative gas production and biogas production rate. The results indicated that VSS removal efficiency increased with the increase of sludge concentration up to the peak of 26.5% when the sludge concentration was 9%. The VSS removal efficiencies of the sludge with TS of 8%, 9% and 12% were over 20%. The viscosity of the sludge with 9% sludge concentration was 18400 mPa•s, which was much higher than 2900 mPa•s when the sludge concentration was 8%. The result showed that the thermal hydrolysis of sludge with TS of 8% had the best performance. The cumulative gas production of the thermophilic anaerobic digestion with only thermal hydrolysis pretreatment of sludge with TS of 8% was 210.24 mL/g-VS, gas production rate was 0.0074 h-1 and the removal efficiency of VSS was 22.8%.
Starting Page	144
Ending Page	152
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1016/j.proenv.2016.02.020
Volume Number	31
Alternate Webpage(s)	https://core.ac.uk/download/pdf/82784681.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.proenv.2016.02.020
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article