摘要
针对养猪废水的养猪沼液处理达标排放困难的情况,探讨采用化学絮凝和磷酸铵镁结晶(MAP)预处理技术对A/O-MBR工艺处理效果的影响,分别采用A/O-MBR、化学絮凝-A/O-MBR和化学絮凝-MAP-A/O-MBR组合工艺处理养猪沼液。结果表明,在MAP段投加MgSO_4·7H_2O和Na_2HPO_4·12H_2O使Mg^(2+)、NH_4^+、PO_4^(3-)的摩尔比为1.1:1.0:0.85,且MBR段HRT为32 h时,化学絮凝-MAP-A/O-MBR组合工艺对COD和NH_4^+-N的去除率分别为78.4%和99.6%经过MAP法结晶后,进水的COD/ρ(TN)从0.97提高至4.10,TN的去除率也从12.0%提升至36.8%,表明提高COD/ρ(TN)能够改善TN的去除效果。
Piggery biogas slurry is difficult to reach the discharge standard after treating. In order to investigate the influence of chemical flocculation pretreatrment and the magnesium ammonium phosphate （MAP） on the A/O-MBR process treatment efficiency, three processes including A/O-MBR, chemical flocculation-A/O-MBR and chemical flocculation-MAP-A/O-MBR were used for treating piggery biogas slurry. The results showed that： under the conditions that the molar ratios of Mg^2＋, NH4^＋, PO4^3- was 1.1：1.0：0.85 in the Airlift Internal Circulation Stru-vite Reactor （AICSR） by adding MgSO4 · 7H2O and Na2HPO4- 12H2O and the HRT was 32 h in the A/O-MBR, the removal efficiency of COD and NH4^＋-N were 78.4% and 99.6% in the chemical flocculation-MAP- A/O-MBR process. After MAP crystallizing, the COD/ρ（TN） of influent increased from 0.97 to 4.10, and the TN removal rate also increased from 12.0% to 36.8% correspondingly, indicating that the increase of COD/ρ（TN） could improve TN removal efficiency.
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第1期86-90,共5页
Technology of Water Treatment
基金
国家科技支撑计划项目(2013BAD21B03)
关键词
化学絮凝
MAP
MBR
猪沼液
chemical floceulation
MAP
MBR
piggery biogas slurry
