污泥水解上清液作为GS系统脱氮除磷碳源研究  

Nitrogen and Phosphorus Removal of Granular Sludge Fed with Hydrolysis Supernatant of Excess Sludge

作　　者：罗玉龙[1,2] 李燕敏 李琳[1] 但冰松 刘小英[1,4] 

机构地区：[1]武汉理工大学土木工程与建筑学院 [2]武汉理工大学城镇供水与水污染控制技术研究中心,湖北武汉430070 [3]北京城建亚泰建设集团有限公司,北京100013 [4]陕西省地下水与生态环境工程研究中心,陕西西安710055

出　　处：《环境科学与技术》2016年第10期118-122,共5页Environmental Science & Technology

基　　金：国家自然科学基金课题(21407114);旱区地下水文与生态效应教育部重点实验室资助项目;国家级大学生创新训练计划项目(20121049706003)

摘　　要：利用超声预处理后的剩余污泥水解酸化产生的有机物物质作为污水厂碳源,不仅有利于解决城市污水厂碳源不足的问题,同时通过剩余污泥的资源化实现剩余污泥的减量化。通过研究得到,污水处理厂剩余污泥经超声(20~25 kHz,1.6 W/mL,15 min)厌氧水解1 h后得到的污泥水解上清液,溶解性COD(SCOD)溶出率为26.5%,其中,挥发性脂肪酸(volatile fatty acid,VFA)约占SCOD的40.3%,VFA中乳酸含量最高。烧杯试验结果表明,污泥水解上清液最大反硝化速率为5.85 mg NO_3^--N/(g MLVSS·h),可以作为反硝化碳源,而最大释磷速率仅为4.57 mg P/(g MLVSS·h),不适于作为生物除磷碳源。由此可见,水解上清液中SCOD的组成直接影响其作为脱氮除磷碳源的可行性。成本分析表明,污泥水解上清液作为碳源可以产生良好的环境和经济效益。The organics obtained from excess sludge treated by ultrasonic pretreatment and hydrolysis treatment can be used as carbon sources, which is benefit to the sludge reduction and reuse. When the excess sludge was treated by the ultrasonic（20 -25 kHz, 1.6 W/mL, 15 min）, and after the anaerobic hydrolysis for 1 h, the digestion efficiency of SCOD in the supernatant was 26.5%, the VFA accounted for 40.3% of SCOD and the concentration of lactic acid was the highest in the VFA. The batch experiments showed that the maximum denitrification rate of granular sludge fed with hydrolysis supernatant was 5.85 mg NO3--N/（g MLVSS·h）, which proved that the hydrolysis supernatant was taken as the carbon sources of denitrification. Nevertheless the hydrolysis supernatant was not taken as the carbon sources of phosphorus removal based on the maximum phosphorus release rate of 4.57 mg P/（g MLVSS·h）. The research indicated that the composition of hydrolysis supernatant had an important effluence on the feasibility of carbon sources for nitrogen and phosphorus removal. And hydrolysis supernatant of excess sludge as carbon sources could be benefit to environment and economy by cost analysis.

关 键 词：剩余污泥 水解上清液 碳源 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]