Cassava Stillage Treatment by Thermophilic Anaerobic Continuously Stirred Tank Reactor (CSTR)

被引：0

作者：

Luo, Gang ^{[1
]}

Xie, Li ^{[1
]}

Zou, Zhonghai ^{[1
]}

Zhou, Qi ^{[1
]}

机构：

[1] Tongji Univ, Inst Environm Sustainable Dev, State Key Lab Pollut Control & Resources Reuse, UNEP, Shanghai 200092, Peoples R China

来源：

2ND INTERNATIONAL SYMPOSIUM ON AQUA SCIENCE, WATER RESOURCE AND LOW CARBON ENERGY | 2010年 / 1251卷

关键词：

cassava stillage; thermophilic anaerobic treatment; organic loading rate; biogas production;

D O I：

10.1063/1.3456276

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper assesses the performance of a thermophilic anaerobic Continuously Stirred Tank Reactor (CSTR) in the treatment cif cassava stillage under various organic loading rates (OLRs) without suspended solids (SS) separation. The reactor was seeded with mesophilic anaerobic granular sludge, and the OLR increased by increments to 13.80 kg COD/m(3)/d (HRT 5d) over 80 days. Total COD removal efficiency remained stable at 90%, with biogas production at 18 L/d (60% methare). Increase in the 01,R to 19.30 kg COD/m(3)/d (HRT 3d), however, led to a decrease in TCOD removal efficiency to 79% due to accumulation of suspended solids and incomplete degradation after shortened retention time. Reactor performance subsequently increased after OLR reduction. Alkalinity, VFA and pH levels were not significantly affected by OLR variation, indicating that no additional alkaline or pH adjustment is required. More than half of the SS in the cassava stillage could be digested in the process when HRT was 5days, which demonstrated the suitability of anaerobic treatment of cassava stillage without SS separation.

引用

页码：49 / 52

页数：4

共 4 条

[1] Thermophilic anaerobic digestion of source-sorted organic fraction of household municipal solid waste: Start-up procedure for continuously stirred tank reactor [J].