Preliminary study on treatment of waste organic matter from livestock by bacteria-mineral technology

摘要

The present study dealt with relationships between the degradation and humification process that the organic matter underwent during bacteria-mineral technology. An inverse correlation was found between the protein,lipid,and some of the humification indices considered,suggesting that the humification theory is actually humic substances produced from simple-structured natural organic substrates. Weight-average molecular weight (M_w),number-average molecular weight (M_n),and the ratio M_w/M_n of dissolved organic matters at different stages of the process were measured by gel permeation chromatography. The results showed that M_n and M_w increased with reaction time from 352 to 17,191,and from 78,707 to 104,564,respectively. The ratio of M_n/M_W decreased from 223.3 to 6.1. This reflected the growth of the polymerization degree of dissolvable organic matters in the process; furthermore,it indicated the formation of complex molecules (humic substances) from more simple molecules. Bacteria-mineral water (BMW) (the effluent of the process) treatments can exert hormone-like activity for enhanced seed germination of wheat and rice and greatly improved chlorophyll synthesis in wheat and rice leaves. Major polyamines (plant regulators) putrescine,spermidine,and spermine,were found in BMW by a high performance liquid chromatography (HPLC) method,which may explain the hormone-like activity of BMW.