摘要
Abstract
Currently,mature sewage treatment technologies are mainly used for industrial wastewater and domestic sewage,and are rarely used for the treatment of aquaculture wastewater.Aquaculture wastewater cannot be effectively treated,resulting in deterioration of the breeding environment and receiving water bodies.In this regard,freshwater aquaculture wastewater was taken as a research object in this study,and biological contact oxidation technology was adopted to study the purification effect of independently developed denitrification bacteria and phosphorus removal bacteria on simulated wastewater and wastewater from a perch captive system under different pollutant loads,different addition dosages and their combination with rope-shaped biological carriers.The results showed that when the simulated wastewater W3(COD 200 mg/L,NH4-N 20 mg/L,TP 1 mg/L)was used as the influent,after 8.6105 cfu/mL phosphorus removal bacteria and 0.5 × 103,1 × 103,1.5 × 103 cfu/mL denitrification bacteria were respectively added into the 2#,3# and 4# reactors,the effluent ammonia nitrogen was less than 1 mg/L in most periods of time,and the actual conversion amount of ammonia nitrogen in the experimental group was greater than that in the blank group 1 #;the nitrate nitrogen concentration in the effluent decreased successively;and under the optimal working conditions,the nitrate nitrogen concentration in the effluent of the 4# reactor was less than 5 mg/L,which was significantly less than that of the blank group 1#,and the absolute phosphorus removal amount in the experimental group was significantly greater than that of the control group 1 #.The combined treatment scheme of rope-shaped filler and bacterial agent has a good transformation effect on the pollutants in simulated wastewater and perch confinement system wastewater.This study provides technical support for the treatment and reuse of aquaculture wastewater.关键词
养殖废水/脱氮除磷/微生物菌剂/生物接触氧化/生物载体Key words
Aquaculture wastewater/nitrogen and phosphorus removal/microbial agent/biological contact oxidation/biological carrier分类
资源环境
