城市生活垃圾外源微生物堆肥对有机酸变化及堆肥腐熟度的影响

利用外源微生物(美商复合菌,MS;中加发酵菌,ZJ)进行城市生活垃圾工厂化堆肥,在堆肥过程中,分析了小分子有机酸及大分子腐殖酸动态变化.结果表明,接种外源微生物可明显提高堆肥前期小分子有机酸含量,在堆肥后期又呈明显的降低趋势.而腐殖酸与胡敏酸则呈现先降低而后增加的趋势.通过对堆肥过程中有机酸、腐殖化指数分析表明,接种外源微生物可明显提高堆肥的腐熟度,并且ZJ发酵菌优于MS复合菌,而2种外源菌混合接种具有协同促进作用.

Inoculating Microbes on Municipal Solid Wastes Composting Affects Organic Acids and Maturity

Inoculating microbes(Meishang compound microbes,MS;Zhongjia fermentation microbes,ZJ) on municipal solid wastes composting which adopted industrialized technology was studied.The dynamic changes of low molecule weight organic acid and high molecule weight humic substance were discussed.The results show that inoculating microbes on municipal solid wastes composting could increase the content of organic acid at initial stage of composting,and decrease that at final stage.But humic substance and humic acid decline at the initial stage,then increase at the final stage of composting.The dynamic changes of organic acid and humification index indicate that inoculating microbes on municipal solid wastes can obviously increase the maturity of composting,and order as follow: MS+ZJ>ZJ>MS>CK.