Effect of different struvite crystallization methods on gaseous emission and the comprehensive comparison during the composting.
Effect of different struvite crystallization methods on gaseous emission and the comprehensive comparison during the composting.
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DOI：
10.1016/j.biortech.2016.02.046
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发表时间：
2016-10
影响因子：
11.4
通讯作者：
Tao Jiang;Xuguang Ma;Juan Yang;Qiong Tang;Zhigang Yi;Maoxia Chen;Guoxue Li
中科院分区：
文献类型：
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作者：
Tao Jiang;Xuguang Ma;Juan Yang;Qiong Tang;Zhigang Yi;Maoxia Chen;Guoxue Li
比较了4种不同鸟粪石结晶工艺对猪粪堆肥化效果的影响。评估了镁和磷酸盐的四种组合（H3 PO 4 + MgO（PMO）、KH 2 PO 4 + MgSO 4（KPM）、Ca（H2 PO 4）2+ MgSO 4（CaPM）、H3 PO 4 + MgSO 4（PMS）），并且还将其与没有添加剂的对照组（CK）进行比较。镁盐和磷酸盐均以相当于初始氮含量的15%（摩尔）的水平补充。SCP对NH_3排放的抑制率为50.7%~ 81.8%，但对N_2O的抑制效果不明显。虽然PMS处理的NH3排放速率最低，但PMO处理的最终产物中鸟粪石含量最高。硫酸盐的加入使甲烷排放量降低了60.8- 74.6%。CaPM处理显著降低了NH3（59.2%）和CH 4（64.9%）的排放量，并产生了完全成熟的堆肥。由于其有效的性能和低成本，建议在实践中使用。
This study compared 4 different struvite crystallization process (SCP) during the composting of pig feces. Four combinations of magnesium and phosphate salts (H3PO4+ MgO (PMO), KH2PO4+ MgSO4(KPM), Ca(H2PO4)2+ MgSO4(CaPM), H3PO4+ MgSO4(PMS)) were assessed and were also compared to a control group (CK) without additives. The magnesium and phosphate salts were all supplemented at a level equivalent to 15% of the initial nitrogen content on a molar basis. The SCP significantly reduced NH3emission by 50.7–81.8%, but not the N2O. Although PMS group had the lowest NH3emission rate, the PMO treatment had the highest struvite content in the end product. The addition of sulphate decreased CH4emission by 60.8–74.6%. The CaPM treatment significantly decreased NH3(59.2%) and CH4(64.9%) emission and yielded compost that was completely matured. Due to its effective performance and low cost, the CaPM was suggested to be used in practice.