Abstract: In recent years, the combined technology of thermal hydrolysis and continuous-flow stirred tank reactor(TH-CSTR) for sewage sludge treatment have attracted more and more interest. In this paper, the effects of thermal hydrolysis pretreatment on the characteristics and digestibility of sewage sludge were investigated, anaerobic sequencing batch reactor(ASBR) instead of CSTR was used and then the integrated process of TH-ASBR was studied. The results showed that the thermal hydrolysis pretreatment can improve the digestibility and the optimum pretreatment conditions were 170℃ and 30min retention time. When thermo-hydrolyzed sludge pretreated under above condition was respectively digested in ASBR and CSTR (control), the organic removal efficiencies and methane production rates of ASBR were higher than those of CSTR with 20, 10, 7.5 and 5-d HRTs, respectively. The optimum HRT of ASBR was 10 days. The TCOD removal efficiency and methane production rate of TH-ASBR process were 2793% and 2514% more than those of TH-CSTR process with 10-d HRT, respectively.

Key words: sewage sludge, thermal hydrolysis, ASBR, anaerobic digestion

摘要： 近年来污泥“热水解－厌氧消化”处理工艺备受重视，在考察热水解预处理对 污泥化学成分及厌氧消化性能影响的基础上，利用厌氧序批式反应器（ASBR）代替传统的连 续流搅拌反应器（CSTR），从而建立了“热水解-ASBR”新工艺。研究表明，热水解预处理 能改善污泥的厌氧消化性能，最合适的预处理条件是热水解温度170℃、热水解时间30min。 热水解污泥厌氧消化时，在水力停留时间（HRT）为20，10，7.5和5 d的条件下ASBR的有机物 去除率和甲烷产气率均比CSTR的高，且ASBR合适的HRT为10d。此时“热水解-ASBR” 工艺的TCOD去除率和甲烷产气率比“热水解-CSTR”工艺分别提高27.93%和25.14%。

关键词: 剩余污泥, 热水解, 厌氧序批式反应器, 厌氧消化