基于热力学分析的MAP法处理模拟氮磷废水研究

发布时间：2018-04-27 02:39

本文选题：磷酸氨镁 + 氮磷废水　；参考：《哈尔滨工程大学学报》2016年11期

【摘要】：磷酸氨镁(MAP)法处理氮磷废水过程中,NH_4~+-N和PO_4~(3-)-P的去除率无法反映影响MAP法的因素及沉淀物的生成过程。为解决此问题通过单因素实验以及热力学平衡计算的方法,对MAP法处理模拟氮磷废水中的氨氮和磷酸盐的影响因素进行了分析和探讨。研究了初始氨氮浓度、p H值、摩尔比n(Mg)∶n(N)以及摩尔比n(P)∶n(N)条件,对NH_4~+-N和PO_4~(3-)-P去除率的影响以及不同条件各沉淀组分的变化。结果表明,在p H值为9~9.5,摩尔比n(Mg)∶n(N)∶n(P)为1∶1∶1条件下,MAP法的处理效果最优,NH_4~+-N去除率可达79.35%~93.76%,PO_4~(3-)-P去除率可达86.76%~95.43%,且MAP沉淀物中杂质较少;虽然增大摩尔比n(Mg)∶n(N)或摩尔比n(P)∶n(N)会分别提高PO_4~(3-)-P和NH_4~+-N去除率,但也会分别使NH_4~+-N和PO_4~(3-)-P残余量增大。
[Abstract]:The removal rate of NH4- N and PO_4~(3-)-P in the treatment of nitrogen and phosphorus wastewater by magnesium phosphate (MMP) process can not reflect the factors affecting MAP process and the process of sediment formation. In order to solve this problem, the influence factors of ammonia nitrogen and phosphate in simulated nitrogen and phosphorus wastewater treated by MAP process were analyzed and discussed by single factor experiment and thermodynamic equilibrium calculation. The effects of the initial NH _ 3-N concentration and the molar ratio of NH _ 4-N and PO_4~(3-)-P on the removal rate of NH _ 4-N and PO_4~(3-)-P and the changes of precipitation components in different conditions were studied. The results show that under the condition that pH value is 9 / 9.5 and molar ratio is n / m / n / n ~ (-1) = 1:1:1, the treatment effect of map method is the best. The removal rate of NH _ 4 ~ -N can reach 79.35 ~ -N and 93.7676 ~ (-4) ~ (-N) ~ (-P) removal rate can reach 86.7676 ~ 95.43%, and the impurity in MAP sediment is less than that of map method. Although the increase of mole ratio (mg / N) or molar ratio (n / n) can increase the removal rate of PO_4~(3-)-P and NH4- N, respectively, it also increases the residual amount of NH4- N and PO_4~(3-)-P, respectively.
【作者单位】：哈尔滨工程大学航天与建筑工程学院;
【基金】：中央高校基本科研业务费项目(HEUCFZ1124) 城市水资源与水环境国家重点实验室开放研究项目(ESK201021)
【分类号】：X703.1

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