BAF污水处理系统中红线虫暴发机制及控制对策

Population Outbreak and Control of Tubifex tubifex in Biological Aerated Filter

胜利油田供水公司沙营污水处理厂的曝气生物滤池(BAF)在冬季运行过程中多次出现红线虫暴发繁殖,严重影响了系统的处理效果。结合该污水厂的红线虫防治工程实践,系统分析了BAF系统红线虫暴发繁殖的形成原因,分别考察了改善进水水质、控制溶解氧浓度、加强反冲洗、消毒杀虫和人工清捞等技术措施的治理效果,提出了清除BAF池内红线虫的防治技术对策。其中,最佳处理方法是滤池停止运行48 h后进行人工清捞,此方法对BAF生物膜的破坏性最小,清理后滤池可在最短时间内恢复运行。

The treatment efficiency of Shaying WWTP in Shengli Oil Field was affected by popula-tion outbreak of Tubifex tubifex in BAF in winter. The outbreak mechanism and engineering response of Tubifex tubifex was analyzed, and the efficiencies of influent improvement, DO control, backwashing reinforcement, disinfection and manual cleaning were respectively investigated. Countermeasures to eliminate Tubifex tubifex in BAF were put forward. Among BAF stopped running sume operation in the for 48 h, which caused minimal them, the best method was manual cleaning after damage to the biofilm in BAF, and BAF could reshortest possible time after cleaning