IC反应器处理水果罐头废水发生酸化及恢复措施

Acidification and Recovery Measures of Internal Cycle Reactor Treating Canned Fruit Wastewater

分析了临沂市某水果罐头食品加工有限公司污水处理站中生产性IC反应器产生酸化的原因,并采取了针对性的工程措施,考察了恢复期IC反应器的运行情况。结果表明,突然提高负荷并保持持续是导致IC反应器酸化的主要原因,可通过提高调节池的HRT、利用出水回流稀释进水、间歇进水、以投加生石灰代替NaOH、提高污泥回流比5种方法同时进行的方式解决。经过短时间调试运行,反应器能够快速恢复至正常高效运行状态,且对COD和氨氮的去除率分别达到84%和45%。

The cause of acidification in an internal cycle ( IC ) reactor in wastewater treatment station of a canned food processing company in Linyi City was analyzed. Specific engineering measures were adopted, and the operation of the IC reactor during the recovery period was investigated. The results showed that the sudden increase and sustained load were the main causes leading to the acidification of the IC reactor, which could be solved by five measures including improving the HRT of the regulating tank , using effluent reflux to dilute the influent, intermittent feeding, adding quicklime instead of NaOH , and increasing the available sludge reflux rate of the process. The reactor quickly returned to normal and efficient operation after a short period of debugging, and the removal rates of COD and ammonia nitrogen reached 84% and 45% respectively.