[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.