摘要
以某玉米深加工厂废水处理车间实际运行的IC反应器为研究对象,分析了运行过程中酸化产生原因及恢复措施,考察了酸化恢复后IC反应器高pH值运行情况。结果表明,高硫酸盐致使IC反应器COD去除率降低、出水VFA急剧升高、沼气产量下降、颗粒污泥粒径变小、碎泥量增多、器壁硫化物量增多,出水pH值变化细微且存在滞后现象。采用减少进水量、投加颗粒污泥、逐步提升负荷等措施,历时22 d后反应器恢复正常运行。恢复正常运行后,将IC反应器进水SO_(4)^(2-)质量浓度、pH值分别控制在400 mg/L以下、6.5~6.7,将IC反应器出水pH值由酸化前的6.82~7.43提高到7.90~8.05,该pH值范围对IC反应器的正常运行影响不大,同时能够降低废水运行成本和沼气净化成本。
Taking the IC reactor in a wastewater treatment workshop of a corn deep processing plant as the research object,the causes of acidification during the operation and the recovery measures were analyzed.The high pH operation of the IC reactor after acidification recovery was investigated.The results showed that high sulfate reduced the COD removal rate of the IC reactor,which caused sharply decrease of VFA in effluent water,decline of biogas production amount,decrease of granule sludge particles diameters,increase of broken mud amount and sulfide amount on the wall;however,the pH value of the effluent water changed slightly and lagged behind.It took 22 days to restore normal operation of the reactor by reducing inlet water quantity,adding granular sludge and gradually increasing load.After the IC reactor returned to normal operation,controlling the SO_(4)^(2-)mass concentration and the pH value of the influent water below 400 mg/L and 6.5~6.7 respectively,and then,increasing the pH value of the effluent water of the IC reactor from 6.82~7.43 to 7.90~8.05,so as to ensure the stable operation of the IC reactor and reduce the cost of sewage operation and biogas purification.
作者
张小雷
王建强
杨延龙
ZHANG Xiaolei;WANG Jianqiang;YANG Yanlong(Heilongjiang Jinxiang Biochemical Co.,Ltd.,Harbin 150000,China;Suihua Xiangyu Jingu Biochemical Technology Co.,Ltd.,Suihua 152000,China)
出处
《工业用水与废水》
CAS
2023年第5期48-52,共5页
Industrial Water & Wastewater
关键词
内循环厌氧反应器
玉米深加工废水
酸化
高PH值
硫酸盐
VFA
internal circulation anaerobic reactor
corn deep processing wastewater
acidification
high pH value
sulfate
VAF
