动态中温厌氧消化液进行鸟粪石回收磷的试验研究

发布时间：2018-05-27 22:41

本文选题：磷回收 + 污泥厌氧消化液　；参考：《中国给水排水》2016年15期

【摘要】：磷元素是一种十分宝贵的矿产资源,面临着日益短缺的局面,而采用活性污泥法工艺会产生大量富含氮磷的剩余污泥。通过在实验室搭建连续式进泥的动态中温厌氧消化处理污泥系统,探究利用鸟粪石结晶法回收系统产出的厌氧消化液中氮磷的优化反应条件,可为实际生产中厌氧消化液的氮磷资源化工艺参数设计提供理论依据。动态试验分为第Ⅰ阶段(氮磷物质的量之比为5.4∶1)和第Ⅱ阶段(氮磷物质的量之比为7.8∶1),当镁磷物质的量之比为1.1∶1时,初始消化液(不加碱液)p H值在7.7以上,鸟粪石纯度可以达到84%。通过投加碱液调节p H值后,消化液的氮磷去除率会随着p H值上升而增高,而鸟粪石纯度并没有明显变化。
[Abstract]:Phosphorus is a valuable mineral resource, which is faced with increasing shortage. However, a large number of nitrogen and phosphorus rich surplus sludge will be produced by the activated sludge process. By setting up a dynamic medium temperature anaerobic digestion system for sludge treatment in laboratory, the optimum reaction conditions of nitrogen and phosphorus recovery from anaerobic digestible solution produced by guano stone crystallization method were investigated. It can provide theoretical basis for the design of nitrogen and phosphorus recycling process parameters of anaerobic digestible liquid in actual production. The dynamic test was divided into the first stage (the ratio of nitrogen and phosphorus was 5.4: 1) and the second stage (the ratio of nitrogen and phosphorus was 7.8: 1). When the ratio of magnesium and phosphorus was 1.1: 1, the initial digestible solution (no alkali solution) was above 7.7. The purity of bird dung stone can reach 84. When pH was adjusted by adding alkali solution, the removal rate of nitrogen and phosphorus increased with the increase of pH value, but the purity of guanderite did not change obviously.
【作者单位】：佛山市水业集团有限公司;中山大学环境科学与工程学院;广东省环境污染控制与修复技术重点实验室;
【分类号】：X703

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