鸟粪石结晶-絮凝沉淀同步法回收养殖场废水的氮磷  

Simultaneous Recovery of Nitrogen and Phosphorus in Farm Wastewater by Struvite Crystallization-Flocculation Sedimentation

作　　者：聂坤 杨成建 李志华 张瑞娜 姜阳 NIE Kun;YANG Chengjian;LI Zhihua;ZHANG Ruina;JIANG Yang(Shaanxi Key Laboratory of Environmental Engineering,School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Key Laboratory of Northwest Resources and Environmental Ecology of Ministry of Education,Xi'an 710055,China;Shanghai Research Institute of Environmental Engineering Design Co.,Ltd,Shanghai 200232,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西省环境工程重点实验室,西北资源与环境生态教育部重点实验室,陕西西安710055 [2]上海市环境工程设计科学研究院有限公司,上海200232

出　　处：《水处理技术》2022年第7期38-42,共5页Technology of Water Treatment

基　　金：国家自然科学基金项目(52070149,51878539);上海市国资委技术创新和能级提升项目(2018001)。

摘　　要：对采用鸟粪石结晶-絮凝沉淀同步法处理含高浓度悬浮物的养殖场废水进行了研究。结果表明,在鸟粪石结晶反应体系中加入PAM,不但有助于改善絮凝沉淀效果,而且可以提高氨氮和磷的回收效果。絮凝沉淀效果主要受PAM加药量和pH的影响,N:Mg:P摩尔比和药剂投加顺序对絮凝沉淀效果几乎没有影响。氮磷回收的最佳条件为:0.3 g/L PAM,pH=9,N:Mg:P摩尔比1:1:1。经处理后的养殖场废水氮磷占比极小,可生化性良好,能够作为反硝化的外加碳源。The use of struvite crystallization-flocculation sedimentation synchronous method on the treatment of farm wastewater with high concentrations of suspended solids was studied. The results showed that adding PAM to the struvite crystallization reaction system could not only improve the flocculation and sedimentation effect but also improve the recovery effect of ammonia nitrogen and phosphorus. The effect of flocculation and sedimentation was mainly affected by the dosage of PAM and the pH value. The molar ratio of N: Mg: P and the order of agent addition had almost no effect on the flocculation and sedimentation. The optimal conditions for nitrogen and phosphorus recovery were: 0.3 g/L of PAM, 9 of pH,and 1:1:1 molar ratio of N: Mg: P. The treated farm wastewater has a very small proportion of nitrogen and phosphorus, good biodegradability, and can be used as an additional carbon source for denitrification.

关 键 词：养殖场废水 鸟粪石结晶法 氮磷回收 碳源回收 

分 类 号：X713[环境科学与工程—环境工程]