利用逐级提高进料浓度的方法启动完全混合反应器处理鸡粪  

Start-up of continuous stirring tank reactor treating chicken manure by stepwise increasing influent solid concentration

作　　者：裴梦富 强虹[2] 杨祎楠 刘晓佩 宋梓梅 PEI Mengfu;QIANG Hong;YANG Yinan;LIU Xiaopei;SONG Zimei(College of Machinery and Electron Engineering, Northwest A＆F University, Yangling 712100, China;College of Resource and Environment, Northwest A＆F University, Yangling 712100, China)

机构地区：[1]西北农林科技大学机械与电子工程学院,杨凌712100 [2]西北农林科技大学资源环境学院,杨凌712100

出　　处：《环境工程学报》2018年第6期1825-1832,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51308460)

摘　　要：为了改进完全混合反应器(continuous stirring tank reactor,CSTR)厌氧消化处理鸡粪的启动效果,通过逐级提高进料鸡粪浓度的方法在CSTR中进行中温(36?C)厌氧消化的启动实验,实验分为2个步骤:污泥适应性驯化和消化能力提升,即通过间歇添加2%浓度鸡粪的方法驯化活性污泥;利用逐级提高进料鸡粪浓度(2.1%、3.2%和5.2%)的方法提高污泥消化能力。结果表明:通过逐级提升进料鸡粪浓度的方法能够驯化出处理一定浓度鸡粪的活性污泥,当进料鸡粪浓度达到5.2%时,CSTR进料有机负荷(organic loading rate,OLR)、总固体含量(total solid,TS)去除率和产沼气量分别达到1.5 g·(L·d)^(-1)、60%和1 L·(L·d)^(-1),甲烷体积分数稳定在(65±3)%左右,总氨氮浓度最高达到1 200 mg·L^(-1),没有出现氨抑制的现象,污泥活性随进料鸡粪浓度提升而逐步得到驯化,从而成功启动反应器正常运行。为CSTR厌氧消化处理高氮基质启动提供了新的方法,具有重要的理论和实践意义。In order to improve the anaerobic digestion start-up efficiency of continuous stirring tank reactor（CSTR）to dispose chicken manure, a new method by increasing influent chicken manure concentration was investigated in mesophilic condition（36？C）.The whole experiment was divided into two steps-acclimation and digestive ability improvement, and the aim of them were acclimating the active sludge to chicken manure by feeding 2% concentration into the reactor intermittently, and improving the digestion ability of active sludge by increasing the substrate concentration（2.1%, 3.2%, 5.2%）. The results showed that the digestion ability was improved with the chicken manure concentration up to 5.2%, the organic removal rate（ORR）, the total solid（TS） removal rate and the biogas yield reached to 1.5 g·（L·d）^-1, 60% and 1 L·（L·d）^-1, respectively. The methane volume fraction was continuously stabilized at（65±3）%. The ammonia inhibition did not appear while the maximum ammonia concentration was1 200 mg·L^-1. The sludge activity could be acclimated with gradient influent TS into the reactor.This study provided a new method to start up the CSTR for high nitrogen substrate anaerobic digestion treatment, which could supply a favorable theoretical and practical reference for the future researches.

关 键 词：完全混合反应器 厌氧消化 鸡粪 污泥驯化 启动 

分 类 号：X705[环境科学与工程—环境工程]