生物膜法处理潮汐河道无序排放污水的研究

STUDY ON THE TREATMENT OF DISORDERLY DISCHARGED SEWAGE IN TIDAL RIVERS BY BIO-FILM PROCESS

采用生物膜法处理潮汐河道无序排放的污水,考察不同水力停留时间和温度下,潮汐作用对反应池内生物膜生长情况影响和COD、NH3-N、TP的沿程分布规律,以及复合酶生物促进剂对反应系统处理效果的促进作用。结果显示在潮汐作用下,HRT=8 h,温度20℃和投加复合酶生物促进剂情况下,COD、NH3-N和TP的去除率分别为53.9%、46.7%和49.4%,分别比对照池高7.1%、13.2%和10.5%,表明生物膜法处理无序排放污水有较强的适应能力,复合酶生物促进剂能提升反应系统的处理效果。在相同温度下,水力停留时间越长,处理效果越好。

The treatment of disorderly discharged sewage by bio-film process with multiple enzymes stimulant was carried out. The distribution of the biomass and COD, NH3-N, TP along the water flow direction were investigated at different HRT and temperature for the tide condition and the promotion of multiple enzymes stimulant was also studied. These results showed that the removal effieiencies of COD, TP and NH3-N were 53.9%, 46.7%,49.4% at HRT=8 h,T=20 ℃ for the system with dosing of multiple enzymes stimulant under the tide condition, which were 7.1%, 13.2%, 10.5% higher than the contrast one. It indicated that the bio-film process possessed high adaptability of treating disorderly discharged sewage for tidal river and the dosing of multiple enzymes stimulant enhanced the treatment efficiency. The removal efficiency increasing with the HRT at the same temperature was also investigated.