羟基磷酸钙联合生物介质结晶除磷新工艺

发布时间：2018-01-10 20:05

本文关键词：羟基磷酸钙联合生物介质结晶除磷新工艺　出处：《中国环境科学》2017年11期 　论文类型：期刊论文

【摘要】：将颗粒污泥引入结晶除磷过程,开发了羟基磷酸钙联合生物介质结晶除磷新工艺.运用自主设计的除磷反应器,考察了pH值、Ca/P、HRT对工艺性能的影响.试验结果显示,对含磷浓度为30mg/L的模拟废水,优化工艺参数为pH=12、Ca/P=3.34(摩尔比)、HRT=60min,除磷率为99.81%,出水磷浓度低至0.057mg/L.采用优化工艺参数,该工艺对猪场废水的除磷率为85.85%,出水磷浓度为4.67mg/L.磷元素在除磷产物中得到富集,尤其在反应器顶部、中部,除磷产物中磷含量达到37.68%和36.57%(以P2O5计),且主要以羟基磷酸钙形态存在,达到优质磷矿石标准,具有较高的回收价值.
[Abstract]:By introducing granular sludge into the process of crystallization and phosphorus removal, a new process of calcium hydroxyl phosphate combined with crystallization of biological medium for phosphorus removal was developed. The pH value of Ca / P was investigated by using a self-designed phosphorus removal reactor. The effect of HRT on the process performance. The experimental results show that the optimum process parameters for simulated wastewater with phosphorus concentration of 30 mg / L are pH = 12% Ca / P = 3.34 (molar ratio). For 60 min, the phosphorus removal rate was 99.81 and the effluent phosphorus concentration was as low as 0.057 mg / L. By optimizing the process parameters, the phosphorus removal rate of the wastewater from pig farm was 85.85%. Phosphorus concentration in effluent was 4.67 mg / L. Phosphorus was enriched in phosphorus removal products, especially at the top and middle of the reactor. The phosphorus content in the phosphorus removal products reached 37.68% and 36.57 (P _ 2O _ 5), and mainly in the form of calcium hydroxyl phosphate, which reached the standard of high quality phosphate rock and has high recovery value.
【作者单位】：浙江大学环境工程系;陆军工程大学国防工程学院;
【基金】：浙江省重点研发计划项目(2015C03013)
【分类号】：X703
【正文快照】： 磷元素是造成水体富营养化的最主要污染因子之一.有研究表明,当水体中的总磷含量达到0.015mg/L时,便足以引发水体富营养化[1-2].一方面,我国水体磷素污染严重,亟待治理.另一方面,磷是工农业发展的重要资源.然而,磷元素在地球化学循环中属于典型的沉积型循环,是一种不可再生资

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