Thermophilic anaerobic digestion of mixed sludge and primary sludge pretreated by short time and low temperature thermal condition

Yun Han, Hui Yi, Yang Zhuo, Tao Dong, Dangcong Peng, Gyokuyu Ri

研究成果: Article査読

抄録

Thermophilic anaerobic digestion of thermal pretreated sludge was investigated using completely stirred tank reactors (CSTRs) at (55±1)℃. Two kinds of concentrated sludge, mixed sludge and primary sludge, both with a TS concentration of 35 g·L-1, were thermally pretreated at 90℃ for 30 minutes, respectively. The performance and stability of thermophilic anaerobic digestion were investigated at a hydraulic retention time (HRT) of 20 days, including biogas production rate, removal efficiency of organic matter, and COD mass balance. The results showed that the biogas production rate of the mixed and primary sludge were (343.00±9.86) mL·g-1, and (365.00±7.61) mL·g-1, respectively; and VS removal efficiencies of those two kinds of sludge were 38.9% and 45.8% in the thermophilic anaerobic digestion. The results of COD mass balance of mixed and primary sludge showed that over 33.6% and 43.9% of the influent organic matters were transformed to biogas with a methane content about 70%.

本文言語English
ページ(範囲)461-467
ページ数7
ジャーナルHuanjing Kexue Xuebao/Acta Scientiae Circumstantiae
35
2
DOI
出版ステータスPublished - 2015 2 6

ASJC Scopus subject areas

  • 環境工学
  • 環境化学
  • 環境科学(全般)

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