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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Pollutant Removal From Aquaculture Wastewater Using the Biopolymer Chitosan at Different Molecular Weights
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Pollutant Removal From Aquaculture Wastewater Using the Biopolymer Chitosan at Different Molecular Weights

机译：使用不同分子量的生物聚合物壳聚糖去除水产养殖废水中的污染物

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摘要

Removal of organic compounds, inorganic nutrients, and bacteria from aquaculture wastewaters before discharge cannot only minimize deterioration of receiving water quality, but can also make possible the reuse of the original water in the culture of prawn, fish, and shellfish. In this study, the feasibility of using chitosan, a multifunctional environmentally friendly biopolymer, at different molecular weights to simultaneously remove various pollutants from the discharge of an eel culture pond is evaluated. Experimental results indicated chitosan with a high molecular weight was best at removing turbidity, suspended solids, and biological and chemical oxygen demand (BOD and COD). In contrast, chitosan of a low molecular weight excelled at removing NH_3 and PO_4~(3-) from wastewater. Additionally, chitosan with a high molecular weight did well at eliminating suspended solids of various particle sizes relative to chitosan with a low molecular weight. The best performance of chitosan in removing turbidity, suspended solids, BOD, COD, NH_3, PO_4~(3-), and bacteria was 87.7%, 62.6%, 52,3%, 62.8%, 91.8%, 99.1%, and 99.998% removal, respectively. When chitosan with a high molecular weight was added at 12 mg/L, the quality of treated wastewater successfully complied with government discharge standards. Furthermore, the relatively low bacteria amount in the wastewater after treatment with chitosan was confirmed by both the plate count method and molecular analysis technique. These results indicated that the application of chitosan is feasible in an effort to recycle the effluents of a culture pond.
机译：在排放前去除水产养殖废水中的有机化合物，无机养分和细菌，不仅可以最大程度地降低接收水的质量，而且还可以使对虾，鱼类和贝类养殖中原水的再利用成为可能。在这项研究中，评估了使用壳聚糖（一种多功能，环境友好的生物聚合物）以不同的分子量同时从鳗鱼养殖池的排放物中去除各种污染物的可行性。实验结果表明，高分子量的壳聚糖最适合去除浊度，悬浮固体以及生物和化学需氧量（BOD和COD）。相反，低分子量的壳聚糖在去除废水中的NH_3和PO_4〜（3-）方面表现出色。另外，相对于低分子量的壳聚糖，高分子量的壳聚糖在消除各种粒径的悬浮固体方面表现良好。壳聚糖在去除浊度，悬浮物，BOD，COD，NH_3，PO_4〜（3-）和细菌方面的最佳性能分别为87.7％，62.6％，52.3％，62.8％，91.8％，99.1％和99.998分别去除％。当以12 mg / L添加高分子量的壳聚糖时，处理后的废水质量成功达到政府排放标准。此外，通过平板计数法和分子分析技术都证实了壳聚糖处理后的废水中细菌含量较低。这些结果表明壳聚糖的应用在努力回收培养池的废水方面是可行的。

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