生态碳纤维填料用于集约型水产养殖废水处理

随着水产养殖逐步从粗放型向集约型养殖发展,水产养殖废水对水环境污染日益加剧。为实现废水循环利用,采用生态碳纤维材料作为接触氧化池内填料处理集约型水产养殖废水,进行中试研究。通过改变曝气强度和水力停留时间(HRT)参数,确定对接触氧化池处理效果及运行特性的影响。试验结果表明:生态碳纤维填料具有易挂膜的优点,接触氧化池内用实际水产养殖废水接种活性污泥,24 h后填料表面附有棕褐色的生物膜,池内水体清澈透明。曝气强度和HRT是影响接触氧化池处理效果的重要因素。在DO为3 mg/L,pH在7~8.5左右,HRT为10 h时,COD、NH4+-N、TP、浊度去除率分别为80%、60%、30%和80%左右。NO2--N、NO3-N浓度分别低于0.1 mg/L和0.5 mg/L,经过接触氧化池处理后的水进入消毒池,出水用于养鱼实现废水循环利用。

Application of Ecological Carbon Fiber Filler in Treatment of Intensive Aquaculture Wastewater

As the aquaculture gradually develops from extensive to intensive farming,the effluent water from aquaculture is polluting environment increasingly.To achieve wastewater recycling,pilot study was done by using ecological carbon fiber as contact oxidation filler to treat aquaculture effluent.The treatment effect and operational characteristics on the contact oxidation tank mainly depend on aeration intensity and hydraulic retention time.Results showed that ecological carbon fiber only need 24 h to produce biological membrane on its surface showing clear effluent under the practical aquatic wastewater vaccinating activated sludge.With condition of DO 3 mg/L,pH range 7~8.5 and HRT 10 h,removal rate of COD,NH4+-N,TP and turbidity were 80%,60%,30% and 80% respectively.The effluent with concentration of NO2——N and NO3——N less than 0.1 mg/L and 0.5 mg/L respectively through the treatment of contact oxidation process can be used for aquiculture achieving wastewater recycling.