餐厨垃圾废水的预处理及UASB厌氧消化小试研究

Experimental Research on Food Waste Water Pretreatment and UASB Anaerobic Digestion

通过对比试验,研究了餐厨垃圾废水混凝剂的种类及加药量;利用UASB反应器进行了连续中温厌氧消化试验,对比了预处理后的餐厨废水和原水的厌氧消化反应效果。结果表明:3种混凝剂对原水污染物的去除效果为PSAF>PAC>PFS,PSAF的最佳投加量为1.5 g/L。经预处理的餐厨废水进入UASB系统,系统在负荷为10.8 kg/(m^3·d)时,产气率能达到0.548 m^3/kg,处理效果最佳。餐厨废水原水直接进入系统,悬浮物及油脂会影响污泥活性,同时会造成管路堵塞。

Through the comparative experiments,the types and dosage of the coagulant for food waste water were studied.The continuous mesophilic anaerobic digestion test was carried out using a UASB reactor,and the effects of anaerobic digestion of the pretreated food waste water and raw water was compared.The results showed that the removal effect of three coagulants on pollutants in raw water was PSAF>PAC>PFS,and the optimal dosage of PSAF was 1.5 g/L.The pretreated food waste water entered the UASB system,the gas yield could reach 0.548 m^3/kg when the system load was 10.8 kg/(m^3·d),and the treatment effect was best.If the raw water entered the system directly,the suspended solids and oil would affect the activity of the sludge and caused blockage of the pipeline.