城市生活垃圾焚烧厂渗滤液产甲烷潜力

为研究城市生活垃圾焚烧厂渗滤液的产甲烷潜力及其影响因素，在常规水质分析的基础上，采用瑞典AMPTSⅡ系统进行中温((37±1) ℃)厌氧消化实验，探究稀释倍数和污泥投加量对城市生活垃圾焚烧厂渗滤液的甲烷产率和可生物降解性的影响。结果表明：城市生活垃圾焚烧厂渗滤液的甲烷产率(以CH4/CODadd计)高于326.0 mL·g-1(理论甲烷产率为350 mL·g-1)，可生物降解性高于93.1%；城市生活垃圾焚烧厂渗滤液是一种高COD、高NH3-N的有机废水，但可生化性较好；无论污泥投加量还是稀释倍数对城市生活垃圾焚烧厂渗滤液的甲烷产率和可生物降解性影响都很小，但稀释倍数的增加可明显降低污泥驯化时间和厌氧消化时间。在工程应用中，采用生化出水回流稀释城市生活垃圾焚烧厂渗滤液的方法，可降低厌氧反应器启动时间和厌氧消化时间，提高城市生活垃圾焚烧厂渗滤液处理效率。

Methane production potential of the leachate from municipal solid waste incineration plants

An automatic methane potential test system Ⅱ (AMPTS Ⅱ) was used to investigate the biochemical methane potential (BMP) of the leachate from municipal solid waste incineration plants (MSWIP) through conducting anaerobic digestion at (37±1) ℃. The effects of dilution ratio and seeding sludge dosage on the methane yield and biodegradability of the leachate were discussed. Results showed that the methane yield (CH4/CODadd) of leachate was above 326.0 mL·g-1(the theoretical methane yield of 350.0 mL·g-1) under the tested experimental conditions, and its bio-degradablity was higher than 93.1%. Although the leachate is a kind of organic wastewater with high COD and NH3-N, it showed a good bio-degradablity. The seeding sludge dosage or dilution ratio had a slight effect on the methane yield and biodegradability of leachate, but an increase in dilution rate could obviously reduce sludge acclimation and anaerobic digestion time. In engineering application, the leachate can be diluted with the reflux of the secondary effluent to reduce the start-up and anaerobic digestion time for an anaerobic reactor, and improve the treatment efficiency of the leachate.