茭白和空心菜套种对沼液消纳的影响研究

Effects of Interplanting Zizania latifolia and Ipomoea aquatica on Biogas Slurry Absorption

[目的]解决单一种植茭白消纳沼液TP值长时间处于超标状态,不满足排放标准的问题。[方法]通过灌溉不同深度的沼液,研究茭白和空心菜套种对其消纳吸收的影响。[结果]茭白和空心菜套种对沼液具有较好的消纳效果,水质得到明显改善。3 cm是氨氮含量为2000 mg/L沼液的最佳灌溉深度,灌溉30 d后,COD、氨氮和磷含量均达到《污水综合排放标准GB 8978-1996》一级标准值。[结论]结果为解决由沼液引起的农村面源污染问题提供理论支撑。

[Objective]To solve the problem that the TP value of biogas slurry consumed by single planting Zizania latifolia exceeds the standard for a long time and does not meet the emission standard.[Methods]The effects of intercropping Zizania latifolia and Ipomoea aquatica on their absorption were studied by irrigating biogas slurry at different depths.[Results]The interplanting of Zizania latifolia and Ipomoea aquatica had a good absorption effect on biogas slurry,and the water quality was significantly improved.3 cm was the best irrigation depth for biogas slurry with ammonia nitrogen content of 2000 mg/L.after 30 days of irrigation,the contents of COD,ammonia nitrogen and phosphorus reach the class I standard value of integrated wastewater discharge standard GB 8978-1996.[Conclusion]The results provide theoretical support for solving the problem of rural non-point source pollution caused by biogas slurry.