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为了治理猪场养殖废水内环境污染因子,笔者在试验猪场建设猪舍养殖废水收集沉淀池,废水固液分离进入初级净化池,以臭氧水(浓度18 mg/L~20 mg/L)对其消毒净化,再经碎石堆砌过滤墙逐级过滤,净水池水面及过滤墙顶土层面种植水芙蓉、芦苇等水生及土生植物,通过这种湿地治理模式达到降解养殖废水污染因子的目的。通过治理,养殖废水污染物降解效率SS为97.08%、NH_3-N为91.69%、TP为80.19%、COD_(cr)为96.55%、BOD_5为91.73%、Cu为77.85%、Zn为74.28%,养殖废水污染物降解效率与治理前相比有极其显著的提高(P≤0.01)。实践证明,猪场建立养殖废水湿地治理模式,能够高效节能、降低成本,治理养殖废水具有明显的生态效益、社会效益和经济效益。
In order to control the environmental pollution factors of farmed wastewater in pig farms, the author collected piggery wastewater from the pig farms to collect the sedimentation tanks. The wastewater was separated into solid and liquid in the primary purification tank. Ozone water (concentration 18 mg / L ~ 20 mg / L) The disinfection and purification, and then by the gravel piled filter wall filtration step by step, the net pool water and filter top soil layer planted water hibiscus, reeds and other aquatic and native plants, through this wetland management model to achieve the purpose of degradation of aquaculture wastewater pollution factor . Through the treatment, the degradation efficiency of pollutants in aquaculture wastewater was 97.08%, NH_3-N was 91.69%, TP was 80.19%, COD cr was 96.55%, BOD_5 was 91.73%, Cu was 77.85% and Zn was 74.28% Wastewater pollutant degradation efficiency compared with before treatment has a very significant increase (P ≤ 0.01). Practice has proved that pig farms to establish wetland management model, energy efficient, reduce costs, treatment of aquaculture wastewater has obvious ecological, social and economic benefits.