摘要
【目的】探明不同的沉淀方法对悬浮固体(TSS)和化学需氧量(COD)的去除效果,明确适宜的猪场沼液预处理方法,破除TSS对厌氧氨氧化技术处理猪场沼液的障碍。【方法】比较曝气沉淀、污泥强化曝气沉淀和混凝絮凝沉淀等方法对猪场沼液的预处理效果。【结果】试验表明:曝气30 min、沉淀1 h为最适曝气沉淀条件,与空白组对比,COD去除率可提高9.24%;污泥强化曝气沉淀由于低水回收率不适用于猪场沼液的预处理;就化学沉淀而言,100 mg/L聚合硫酸铁(PFS)+8 mg/L聚丙烯酰胺(PAM)为最佳的浓度组合,可将TSS去除率提高52.08%。【结论】通过比较筛选获得了经济高效的猪场沼液预处理方法,即采用100 mg/L PFS+8 mg/L PAM的组合形式、沉淀1 h为最适合猪场沼液预处理方法。本研究可为厌氧氨氧化处理猪场沼液的工程应用提供技术支撑。
【Objective】This paper purposes to investigate the effect of different precipitation methods on the removal of suspended solids(TSS)and chemical oxygen demand(COD),determine the appropriate pretreatment method of digested swine wastewater,and remove the obstacles of TSS to anaerobic ammonia oxidation technology to treat digested swine wastewater.【Method】By comparing the pretreatment methods such as aeration precipitation,sludge enhanced aeration precipitation and coagulation flocculation precipitation,this study found the most suitable pretreatment method for digested swine wastewater.【Result】The results showed that,aeration for 30 min and precipitation for 1 h were the best conditions.Compared with the blank group,the COD removal rate can be increased by 9.24%.Sludge-enhanced aeration sedimentation is not suitable for pretreatment of digested swine wastewater due to low water recovery rate.As far as chemical precipitation,100 mg/L polymeric ferric sulfate(PFS)+8 mg/L polyacrylamide(PAM)is the best concentration combination,which can increase the TSS removal rate by 52.08%.【Conclusion】In this study,an economical and efficient pretreatment method for digested swine wastewater was obtained through comparative screening,the combination of 100 mg/L PFS+8 mg/L PAM and precipitation for 1 h are the most suitable pretreatment methods for digested swine wastewater.This study can provide technical support for the engineering application of anammox for the treatment of digested swine wastewater.
作者
黄燕
周曼
邓良伟
王兰
HUANG Yan;ZHOU Man;DENG Liangwei;WANG Lan(College of Water Conservancy and Hydropower Engineering,Sichuan Agricultural University,Yaan 625000,Sichuan,China;Biogas Institute of Ministry of Agriculture and Rural Affairs,Chengdu 610041,China;College of Food Science,Sichuan Agricultural University,Yaan 625000,Sichuan,China)
出处
《四川农业大学学报》
CSCD
北大核心
2023年第3期481-487,536,共8页
Journal of Sichuan Agricultural University
基金
四川省科技计划资助(2021ZDZX0012)
四川省科技计划项目(2021YJ0319)
中国农业科学院青年创新专项(Y2022QC31)
中央级公益性科研院所基本科研业务费专项(1610012020001_03202)
国家现代农业产业技术体系专项资金(CARS-35)。
关键词
猪场沼液
悬浮固体
污泥强化曝气沉淀
絮凝混凝沉淀
厌氧氨氧化
digested swine wastewater
total suspended solid
sludge enhanced aeration precipitation
coagulation flocculation precipitation
anammox
