Comparison between thermophilic and mesophilic anaerobic digestion of waste activated sludge by combined NaOH-microwave pretreatment

Fu Qiang Chen, Yong Zhi Chi, Kai Xiong Li, Yanming Zhang, Zhe Tian, Xue Ning Fei, Yu You Li

Research output: Contribution to journalArticlepeer-review

Abstract

The purpose of this study was to investigate the performance of the thermophilic and mesophilic anaerobic digestion process (TADP, MADP) fed with NaOH-microwave pretreated waste activated sludge. The experiment was conducted in anaerobic CSTR reactors. During this experiment, the reactors were stable in operation and were not inhibited by ammonia. The methane production and reduction of organic matters from MADP were less than those from TADP. The dewatering performance of mesophilic sludge was better than that of the thermophilic sludge. The experimental results showed that the continuous TADP and MADP were effective, when the reactors were fed with the waste activated sludge pretreated by NaOH-microwave. MADP was more suitable to combine the NaOH-MW pretreatment process than TADP.

Original languageEnglish
JournalEnvironmental Technology (United Kingdom)
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • dewaterability
  • methane fermentation
  • NaOH-microwave pretreatment
  • Waste activated sludge

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal

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