HBH-Ⅱ微生物制剂与生物膜法联合处理垃圾渗滤液的效果试验

Experimental study on the effect of landfill leachate by means of HBH—Ⅱcompound microorganism and biofilm process

将复合微生物制剂(HBH-Ⅱ)与生物膜法相结合,以重庆市某垃圾填埋场的渗滤液为研究对象,探讨了HBH-Ⅱ制剂在3种不同条件下对渗滤液的处理效果。结果表明,HBH-Ⅱ对垃圾渗滤液COD和NH_3-N的去除有明显影响。反应72 h、低流量间歇曝气36 h、接种量1/10 000(HBH-Ⅱ与水的体积比)、进水pH=8.5条件下,处理效果最佳。HBH-Ⅱ中的复合微生物具有生物增强剂的作用,能明显促进污染物的降解。采用HBH-Ⅱ制剂时克服了以往处理工艺中气味恶臭的弊端,还具有产泥量小、色度去除效果好等优点。与单独使用HBH-Ⅱ处理渗滤液相比,以陶粒为填料的HBH-Ⅱ生物膜系统能够为HBH-Ⅱ的生长繁殖提供良好环境。挂膜成功运行5 d后,COD和NH_3-N的去除率分别达到70.58%和72.99%。

The paper aims to present our research on the Effect of landfill leaehate by means of HBH - Ⅱ compound microorganism and biofilm process by taking a landfill site in Chongqing as our case study. When we did our analysis of the landfill leachate, we have found that HBH - Ⅱ can effectively improve the removal rates of COD and NH3 - N, by adding HBH - Ⅱ directly 〉 adding HBH - Ⅱ after sterilization 〉 none adding HBH - Ⅱ. Further studies of ours are on the use of HBH - Ⅱ for landfill leachate treatment as well as the removal rate of reaction time, low-flow intermittent aeration time, inoculation amount and pH value of the three treatments. Based on the analysis of COD and NH3 - N removal rates, the results turn to be more favorable, which indicate that the optimal operation conditions can be summarized as follows： the optimal reaction time is 72 h, the optimal aeration time is 36 h with the optimal HBH - Ⅱ inoculation amount being 1/10 000 and leachate pH value being 8.5. Furthermore, the effective microorganisms prove to be playing a role as biological strengthening agent, which tends to significantly promote the degradation of contaminants. Compared with other traditional methods, ours enjoys the advantages, such as getting rid of horrible smell in the treatment process, less amount of sludge and better removal effect of color, etc. The study on the combination of HBH - Ⅱ technology and biofilm process in treating landfill leachate indicates that under the optimum operating conditions, the biofilm system with ceramic granules as filler tends able to provide a better environment for HBH - Ⅱ growth and reproduction, with the higher removal efficiency with COD getting up to 70.58 % and NH3 - N to 72.99 % respectively in a five-day biofilm cultivation.