Abstract: The mesophilic(35±1)℃ two-phase anaerobic digestion process has been used for treating excess sludge,the improved anaerobic sequencing batch reactor(ASBR) used for methanogenic phase. The influences of solid-liquid separation in the methanogenic phase on the process of anaerobic digestion of sludge investigated. The operation of ASBR is dividedinto start-up stage,solid-liquid separation stageⅠ and solid-liquid separation stage Ⅱ. The results show that SS concentration of effluent in ASBR clear water area is maintained at 400-600 mg/L,achieving solid-liquid separation. Inthe three stages of ASBR,the system VS removing rates are 38.98%,44.02% and 47.92%,respectively, and the methanogenic rate are 162,171 and 192 mL/gVS,respectively. The solid-liquid separation of the methano-genic phase improves the VS degradation rate and aerogenic capability of the sludge anaerobic system.

Key words: excess sludge, two-phase anaerobic digestion, anaerobic sequencing batch reactor, solid-liquid separa-tion characteristics

摘要： 利用中温（35±1）℃两相厌氧消化工艺处理剩余污泥，产甲烷相采用改进的厌氧序批式反应器（ASBR），研究了产甲烷相中固液分离对污泥厌氧消化过程的影响。ASBR运行分为启动阶段、固液分离Ⅰ阶段和固液分离Ⅱ阶段。结果表明：ASBR清水区出水SS维持在400~600 mg/L，实现了固液分离；3个阶段的系统VS去除率分别为38.98%、44.02%和47.92%，单位VS产CH₄率分别为162、179、192 mL/g。产甲烷相的固液分离提高了污泥厌氧系统的VS降解率和产气性能。

关键词: 剩余污泥, 两相厌氧消化, 厌氧序批式反应器, 固液分离特性

CLC Number: 

• X703