摘要
结合化粪池废水水质特点,利用响应面法分析了磷酸铵镁(MAP)结晶法处理模拟化粪池废水结晶除磷的主要影响因子及最优反应条件,并在此基础上,考察了钢渣基晶种滤池(SCMF)对模拟化粪池废水的过滤结晶除磷效果。结果表明,pH值、氨氮浓度和Mg/P值是影响模拟化粪池废水MAP结晶的主要影响因素,模拟得到最优条件如下:pH值为9.63、Mg/P值为1.37、氨氮浓度为115.3 mg/L;优化条件下,模拟化粪池废水MAP结晶反应30 min,除磷率可以稳定在99%以上。按照最优工况条件连续运行钢渣基晶种滤池30 d,系统除磷率一直稳定在95%左右。由XRD图谱可知,钢渣基晶种滤池得到的除磷产物主要为MAP,且晶化程度好,有很高的回收价值。
Based on the septic tank wastewater quality analysis,the major impact factors in the treatment of simulated septic tank wastewater using magnesium ammonium phosphate(MAP)crystallization were analyzed.In addition,the optimal reaction conditions was predicted using BoxBehnken Design(BBD)response surface method.A steel slag seed crystal media filter(SCMF)was operated under the optimal condition,to investigate the removal and recovery of phosphorus from simulated septic tank wastewater.It was found that the MAP crystallization was mainly affected by initial pH value,ratio of Mg/P,and ammonia concentration.The optimal operation condition included initial pH value of 9.63,Mg/P ratio of 1.37,and ammonia concentration of 115.3 mg/L.Under the optimal condition,more than 99%of phosphorus was removed from the septic tank wastewater within reaction time of 30 min.Phosphorus removal rate was maintained 95%in a 30-day continuous operation under the optimal condition.XRD characterization showed that the major ingredient of crystal product was MAP with good crystallization degree,which had a great convenience for the phosphorus recovery.
作者
卢立泉
邱立平
邱琪
程仁振
陶泽豫
樊明哲
LU Li-quan;QIU Li-ping;QIU Qi;CHENG Ren-zhen;TAO Ze-yu;FAN Ming-zhe(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,China;Jinan Municipal Engineering Design&Research Institute<Group>Co.Ltd.,Jinan 250101,China;School of Water Conservancy and Environment,University of Jinan,Jinan 250022,China;School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan250101,China;Baotou Municipal Engineering Administration Bureau,Baotou 014030,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第21期103-108,共6页
China Water & Wastewater
基金
国家自然科学基金资助项目(51678276、51808257)
济南市“高校20条”科研带头人工作室资助项目(2018GXRC020)
关键词
模拟化粪池废水
钢渣基晶种滤池
磷酸铵镁结晶
BBD响应面分析
simulated septic tank wastewater
slag seed crystal media filter
MAP crystallization
BBD response surface analysis
