不同生物质灰渣填充密度下处理生活污水的效果研究  

Study on the Treatment Effect of Biomass Ash on Domestic Wastewater Under Different Filling Density

作　　者：刘彬彬[1] 高明[1] 王侃[1] 黄容[1] 

机构地区：[1]西南大学资源环境学院,重庆市三峡库区农业面源污染控制工程技术研究中心,重庆北碚400715

出　　处：《水土保持学报》2015年第6期296-300,共5页Journal of Soil and Water Conservation

基　　金：国家“十二五”科技支撑计划项目(2012BAD14B18)

摘　　要：以生物质灰渣为研究对象,采用土柱淋溶模拟法,研究在不同生物质灰渣填充密度R1(0.3g/cm^3)、R2(0.35g/cm^3)、R3(0.4g/cm^3)下,生物质灰渣对生活污水中主要污染物即化学需氧量(COD)、总氮(TN)、氨氮(NH_3—N)、总磷(TP)的去除效果。结果表明:生物质灰渣对COD的去除率随着填料密度的增加先升高后降低,表现为R2(59.1%)>R1(58.0%)>R3(44.4%),其中R2处理效果明显优于R1和R3处理;R1、R2、R3对TN的去除率分别为84.8%,43.3%,26.1%,而对污水中氨氮的去除效果良好,去除率均达到97%以上;对污水中TP而言,3种密度下平均出水TP浓度分别为0.406,0.249,0.406mg/L,平均去除率大小为分别为R2(91.3%)>R1(85.8%)>R3(85.6%),去除效果较好。在试验后期由于被吸附的磷被释放出来,故对污水中TP的去除效果并不明显,但R2处理效果仍优于其他2种处理。总体而言,生物质灰渣可有效去除污水中COD、TN、NH_3—N和TP,其中NH_3—N和TP的除去率均在85%以上,生物质灰渣填料密度为0.35g/cm^3的处理效果最好。This study selected biomass ash as research objective and investigated the removal efficiency of the main pollutants in domestic sewage,such as the chemical oxygen demand（COD）,total nitrogen（TN）,ammonia nitrogen（NH_3—N）and total phosphorus（TP）,with different densities of biomass ash including R1（0.3g/cm^3）,R2（0.35g/cm^3）and R3（0.4g/cm^3）,by using soil column leaching simulation method.The results were as follows：The removal rate of COD by biomass ash rose at first and then lowered with the increasing packing density,which was significantly higher in R2 treatment than in R1 and R3treatments,and listed in the following order：R2（59.1%）〉R1（58.0%）〉R3（44.4%）.The removal rates of TN in 3filling density treatments listed in the following order：R2（84.8%）〉R3（43.3%）〉R1（26.1%）.The removal rates of NH_3—N were high in all the 3filling density treatments,which were up to more than 97%.In R1,R2 and R3treatments,the average TP concentrations in domestic sewage were 0.406mg/L,0.249mg/L and 0.406mg/L,respectively,and the average removal rate of TP listed in the following order：R2（91.3%）〉R1（85.8%）〉R3（85.6 %）.The removal efficiencies of TP in the 3filling density treatments were all high,but in the late period of the experiment,the adsorbed phosphorus was released,and therefore the removal effect of TP was not obvious.However,the effect of the R2 treatment was still better than those of the other 2treatments.Overall,biomass ash can effectively remove COD,TN,NH_3—N and TP from sewage,with the removal rates of NH_3—N and TP higher than 85%,and biomass ash showed the best effect in the R2 density treatment（0.35g/cm^3）.

关 键 词：生物质灰渣 填充密度 污水处理 

分 类 号：S152.7[农业科学—土壤学]