工艺参数对蚯蚓生态滤池净化养殖污水的影响

发布时间：2019-03-13 12:54

【摘要】：【目的】探讨蚯蚓添加量、布料强度和布料方式等工艺参数对蚯蚓生物滤池净化养殖污水的影响特征,确定滤池规模化处理畜禽养殖污水的最佳条件,为养殖污水处理提供技术支撑。【方法】采用蚯蚓生态滤池技术净化养殖污水,测定水样中的总氮(TN)、氨氮(NH_4~+-N)、硝氮(NO_3~--N)、总磷(TP)、磷酸盐(PO43-)、化学需氧量(COD)、pH和电导率(EC)等指标。【结果】在相同蚯蚓添加量和滤料总量下,单层生态滤池去除养殖污水中TN、NH_4~+-N、NO_3~--N和COD的效果优于双层,但去除PO43-的效果劣于双层;布料强度为2.25~4.50 m~3/m~2·d时,最有利于养殖污水中NH_4~+-N、TN、TP和COD的去除,但对NO_3~--N含量、pH和EC变化无明显影响;蚯蚓添加量为0.5 kg/箱的处理对进水TN、NO_3~--N、NH_4~+-N、TP、PO43-和COD的平均去除率明显小于投入量1.0~2.0 kg/箱的处理,但蚯蚓添加量过大会导致出水EC增加。【结论】蚯蚓生态滤池能够持续高效并相对稳定地去除养殖污水中氮、磷和碳等污染物质。综合成本和效率因素,蚯蚓生态滤池净化养殖污水工艺建议采用单层布料,布料强度4.50 m~3/m~2·d,蚯蚓添加量1.0 kg/箱。
[Abstract]:[objective] to investigate the effects of earthworm addition, distribution strength and distribution mode on the purification of aquaculture wastewater by earthworm biological filter, and to determine the optimal conditions for large-scale treatment of livestock and poultry wastewater in the filter. [methods] (TN),-N), ammonia nitrogen (NO_3~--N) and total phosphorus (TP), in water samples were determined by using earthworm ecological filter technology to purify aquaculture wastewater. Phosphate (PO43-), chemical oxygen demand (COD), pH) and electrical conductivity (EC) were determined. [results] under the same amount of earthworm and the total amount of filter media, the single layer ecological filter was used to remove TN,NH_4~-N from aquaculture wastewater. The effect of NO_3~--N and COD is better than that of double layer, but the effect of removing PO43- is worse than that of double layer. When the cloth strength was 2.25 ~ 4.50 m ~ (3) ~ 2 路d, the removal of NH_4~-N, TN, TP and COD was the best, but it had no obvious effect on the content of NO_3~--N, the change of pH and EC; The average removal rates of TN,NO_3~--N,NH_4~-N, TP, PO43-and COD in influent water treated with 0.5 kg/ earthworm addition were significantly lower than that in 1.0 / 2.0 kg/ box. [conclusion] the earthworm ecological filter can remove nitrogen, phosphorus and carbon from the wastewater continuously, efficiently and stably. [conclusion] the earthworm ecological filter can remove the nitrogen, phosphorus and carbon pollutants from the wastewater. [conclusion] the earthworm ecological filter can remove nitrogen, phosphorus and carbon from the wastewater. According to the cost and efficiency factors, it is suggested to adopt single layer cloth, 4.50m ~ 3 ~ 2 路d, 1.0 kg/ box for earthworm ecological filter to purify aquaculture wastewater.
【作者单位】：扬州大学环境科学与工程学院;水利部南京水利科学研究院;扬州市农业委员会;
【基金】：“十二五”国家科技支撑计划项目(2013BAD21B03) 江苏省第五期“333”工程培养资金资助项目(BRA2016164) 扬州市—扬州大学产学研合作专项项目(2012038-17) 镇江市科学技术重点研发计划项目(SH2015010)
【分类号】：X713

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