荔枝核-PVA多孔复合固体碳源在养殖废水中的脱氮研究

发布时间：2018-06-02 06:22

本文选题：荔枝核 + 聚乙烯醇　；参考：《水处理技术》2016年09期

【摘要】：将不同粒径荔枝核、聚乙烯醇(PVA)和海藻酸钠复合获得多孔固体碳源,对复合碳源的微观形貌、孔隙结构进行表征,并在人工配制的工厂化循环养殖废水中考察了其作为反硝化碳源的释碳速率及脱氮效果。结果表明,扫描电镜显示粒径250μm复合碳源的外表面致密,孔隙较少,而含粒径150μm和粒径75μm荔枝核的复合碳源外表面孔隙较多,内部孔隙发达。脱氮过程中,粒径75μm复合碳源的硝酸盐去除率在第3天可达到100%,无亚硝酸盐积累。粒径150μm复合碳源NO_3~--N去除率逐渐上升至94.71%,NO_2~--N质量浓度则逐渐降低至0.74 mg/L。粒径250μm复合碳源脱氮效果较差,NO_3~--N去除率为30%。粒径75μm和粒径150μm复合碳源孔隙发达,碳源释碳能力强,短时间内硝酸盐去除率高,可作为海水养殖废水反硝化脱氮的固体碳源填料。
[Abstract]:The porous solid carbon source was obtained by combining different diameter litchi nucleus, polyvinyl alcohol PVA) and sodium alginate. The microstructure and pore structure of the composite carbon source were characterized. The carbon release rate and denitrification effect of denitrifying carbon source were investigated in the artificial industrial recycling culture wastewater. The results showed that the outer surface of the composite carbon source with the diameter of 250 渭 m was compact and the porosity was less, while the outer surface of the carbon source containing 150 渭 m diameter and 75 渭 m diameter of litchi nucleus had more pores and the internal pores were developed. In the process of denitrification, the nitrate removal rate of 75 渭 m composite carbon source can reach 100 kW on the 3rd day without nitrite accumulation. The removal rate of NO_3~--N from 150 渭 m composite carbon source was gradually increased to 94.71%, and the mass concentration of N decreased to 0.74 mg 路L ~ (-1) 路min ~ (-1) 路L ~ (-1). The denitrification efficiency of 250 渭 m composite carbon source was less than that of no _ 3- N removal rate of 30%. The pore size of 75 渭 m and 150 渭 m of composite carbon source is developed, the carbon source has strong carbon release ability, and the nitrate removal rate is high in a short time. It can be used as a solid carbon source filler for denitrification and denitrification of mariculture wastewater.
【作者单位】：中国水产科学研究院南海水产研究所农业部南海渔业资源开发利用重点实验室;上海海洋大学水产与生命学院;浙江省海洋水产研究所;
【基金】：广东省海洋经济创新发展区域示范专项项目(GD2012-A02-011) 广东省海洋渔业科技推广专项科技攻关与研发项目(A201301D02) 深圳海洋经济创新发展区域示范专项项目(SZHY2012-B02-001) 中央级公益性科研院所基本科研业务费专项资金项目(2014TS20,2015TS11) 浙江省重大科技专项重点农业项目(2012C12010-1)
【分类号】：X714

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