空化水射流处理垃圾渗滤液实验研究

以重庆某垃圾填埋场的渗滤液为研究对象,采用空化水射流空化降解垃圾渗滤液中复杂有机物,通过实验研究了泵压、围压、pH值和空化时间对空化处理垃圾渗滤液的影响规律,得出了空化水射流能降解有机物,从而显著提高渗滤液的可生化性的结论,同时确定了最佳空化条件是围压0.6 MPa,pH值9.0,空化处理时间90 min,泵压10 MPa。在最佳条件下空化处理垃圾渗滤液,COD和BOD5分别上升了124.8%和293.3%,BOD5/COD也提高了52.44%,色度降低,SS提高了191.5%,为后续处理创造有利条件。

Landfill Leachate Treatment by Cavitating Water Jets

Cavitating water jets were used to degrade complicated organic compounds sampled from landfill leachate from a sanitary landfill in Chongqing,P.R.China.The law of chemical oxygen demand(COD) and the impact of factors such as pumping pressure,confining pressure,cavitating time and pH were evaluated in the experiment.We concluded that a cavitating water jet can degrade complicated organic compounds.Cavitating water jets therefore can improve biological oxygen demand(BOD)5/COD.The optimal cavitating condition was also obtained: at a pH 9.0,confining pressure 0.6MPa,cavitating time 90mins and pumping pressure 10MPa,the COD,BOD5 and BOD5/COD increase to 124.8%,293.3% and 52.44% respectively.Chromaticity decreases while SS increase to 191.5%.These changes create good conditions for subsequent treatment.