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首页> 外文会议>International Conference on Energy, Environment and Sustainable Development >The Effect of Organic Compounds on the Recovery of Ammonium by Struvite Precipitation from Swine Anaerobic Digester Effluent
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The Effect of Organic Compounds on the Recovery of Ammonium by Struvite Precipitation from Swine Anaerobic Digester Effluent

机译：有机化合物对猪厌氧消化酯流出物脱硝盐沉淀回收铵的影响

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Recovering nitrogen and phosphorus through struvite crystallization from swine wastewater has gained increasing interest. However, effluents of anaerobic digested swine wastewater contains other constituents including complex and hardly definited organic compounds, which may hinder the fomiation of struvite crystal and affect the purity of the precipitates by forming other insoluble minerals. Struvite precipitation was carried out at laboratory scale by adding magnesium chloride and potassium hydrogen as external sources of magnesium and phosphorus to equal Mg: N: P molar ratio, respectively, and regulating the pH at 9.5 in the absence and presence of organic compounds. Exceeded 70% phosphate and ammonium reduction were obtained. The recovered products were detected and analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD) and chemical methods, which were proved to be struvite crystals. The soluble organic compounds had less than 6% changes in amount during struvite precipitation and it was proved that the removal of TCOD during the precipitation of struvite may be attributed to the co-precipitation of struvite. The results indicate that struvite precipitation could be a viable method of ammonium removal in the presence of organic compounds from anaerobically digested swine manure.
机译：通过来自猪废水的斯基矾结晶回收氮和磷，得到了越来越多的兴趣。然而，厌氧消化的猪废水的流出物含有其他组分，包括复合物和难以定义的有机化合物，其可能阻碍斯基矾晶体的变化并通过形成其他不溶性矿物来影响沉淀物的纯度。通过将氯化镁和氢气作为外部镁和磷作为相等的Mg：N：P摩尔比，分别在没有磷的情况下进行脱渣沉淀，并在不存在和存在有机化合物的情况下调节9.5的pH值。获得了70％的磷酸盐和还原铵。通过扫描电子显微镜（SEM），X射线衍射（XRD）和化学方法检测并分析回收的产物，其被证明是斯特鲁维晶体。溶于溶解的有机化合物在斯基铝沉淀过程中的量少于6％的量，证明在脱渣沉淀过程中去除TCOD可能归因于斯特勒维的共沉淀。结果表明，稳定沉淀可以是厌氧物质消化猪粪的有机化合物存在下可行的铵去除方法。

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