生物曝气联合混凝法处理养殖废水厌氧消化液固体悬浮物的试验研究  

Experimental study of biological aeration-coagulation combined process treating suspended solid in anaerobic digestion solution of livestock wastewater

作　　者：程子言 白文静 马欣悦 胡真虎[1,2] CHENG Ziyan;BAI Wenjing;MA Xinyue;HU Zhenhu(Department of Municipal Engineering,School of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院市政工程系,合肥230009 [2]安徽省农村水环境治理与水资源利用工程实验室,合肥230009

出　　处：《工业用水与废水》2023年第4期19-24,共6页Industrial Water & Wastewater

基　　金：安徽省科技重大专项(18030801102);安徽省自然科学基金(2208085ME145)。

摘　　要：为了高效去除养殖废水厌氧消化液中的高浓度固体悬浮物(SS),确保后续厌氧氨氧化脱氮处理的稳定性,探究了生物曝气联合混凝去除养殖废水厌氧消化液SS的效果。结果表明,单独混凝处理厌氧消化液,1.5 g/L聚合氯化铝(PAC)反应16 min后SS去除率为53.7%;单独生物曝气(好氧活性污泥曝气)处理厌氧消化液,1 L/min生物曝气处理20 min后SS去除率为37.3%。而1 L/min生物曝气处理20 min后的出水中投加1.5 g/L PAC反应16 min,最终SS去除率达到99.2%,总磷去除率为98.0%。生物曝气联合PAC混凝处理可以有效降低厌氧消化液中的SS浓度。In order to remove high-concentration suspended solids(SS)from anaerobic digestion solution of livestock wastewater and ensure the stability of subsequent anammox process,the effect of biological aeration-coagulation combined process on SS removal was investigated.The results showed that,under the condition of single coagulation,the removal rate of SS reached 53.7%after 1.5 g/L polymeric aluminum chloride(PAC)reaction for 16 minutes,under the condition of single biological aeration(aerobic activated sludge aeration),the removal rate of SS was 37.3%after 1 L/min biological aeration for 20 minutes.However,adding 1.5 g/L PAC into the effluent water from the treatment unit of 20-min 1 L/min biological aeration,the final removal rate of SS reached 99.2%in 16 minutes,and the removal rate of total phosphorus was 98.0%.Therefore,combined process of biological aeration and PAC coagulation can effectively reduce SS concentration in anaerobic digestion solution.

关 键 词：生物曝气 混凝 固体悬浮物 厌氧消化液 阳离子聚丙烯酰胺 聚合氯化铝 

分 类 号：X703.1[环境科学与工程—环境工程] X503.221