气浮浓缩污泥两相厌氧消化  

Two-phase Anaerobic Digestion of Floatation Thickening Sludge

作　　者：高廷耀[1] 周恭明[1] 周增炎[1] 

机构地区：[1]同济大学城市污染控制国家工程研究中心,上海200092

出　　处：《同济大学学报（自然科学版）》1999年第1期43-46,共4页Journal of Tongji University:Natural Science

摘　　要：研究了高温酸化 (5 5℃ )、中温甲烷化 (35℃ )两相和中温单相厌氧工艺处理气浮浓缩污泥的性能 .研究结果表明 ,对于较高浓度的气浮浓缩污泥在水力停留时间 (tHR)大于 1 0d ,挥发性固体 (VS)的有机负荷小于 3.77kg·m-3 ·d-1的条件下 ,两相厌氧消化系统去除率可超过 40 % .当tHR降至 7d ,有机负荷升至 5 .38kg·m-3 ·d-1时 ,VS去除率仍可达 35 % .在tHR为 1 0d ,有机负荷为 3.77kg·m-3 ·d-1的条件下 ,两相厌氧消化系统VS去除率要优于单相系统 ,但两相系统的甲烷化罐出现较高浓度的有机酸积累 ,其结果表明对于两相厌氧消化系统 ,不仅要强化产酸罐的水解和发酵的速率和效率 ,而且要避免酸化罐形成的有机酸对甲烷化罐的负影响 ,否则会导致两相系统比单相系统更差的处理性能 。Efficiencies of floatation thickening sludge treatment by thermophilic acidification (55 ℃)-mesophilic methane formation (35 ℃) two-phase anaerobic digestion or mesophilic single-phase anaerobic digestion were studied. Results showed that for relative high concentration of floatation thickening sludge treatment, volatile solids (VS) reduction efficiencies of two-phase anaerobic digestion systems could reach over 40% when VS loading rates were less than 3.77 kg·m -3 ·d -1 at more than 10 days hydraulic retention time ( t HR ). When the t HR was lowered to 7 days (Correspondingly, the VS loading rate was increased to 5.38 kg·m -3 ·d -1 ), the VS reduction efficiency could still reach 35%. At 10 days t HR and 3.77 kg·m -3 ·d -1 of VS loading rate, two-phase anaerobic digestion system had higher VS reduction efficiency than single-phase anaerobic digestion system. However, the volatile acids accumulation in the former system was more serious than the latter one. Results indicate that the better performance of two-phase systems over single-phase systems must satisfy the conditions including not only strengthening the rate and efficiency of hydrolysis and fermentation in acidifying reactors but also preventing the accumulated volatile acids from adversely affecting the performance of mehtane formation reactors, or resulting in lower performance of two-phase system, even the failure of the operation.

关 键 词：厌氧消化 两相 污泥 气浮浓缩污泥 

分 类 号：X703[环境科学与工程—环境工程]