Effects Of Inoculating Different Microorganism Agents On Composting Of Wool Scouring Solid Wastes

Wool scouring factories are relatively concentrated in China. Wool scouring solid wastes produced up to 300,000 tons from factories every year. Wool scouring solid wastes contain a lot of malignant bacteria, fungi, parasites and grass seeds and other harmful substances. Composting is one of the most suitable method for wool scouring solid wastes disposal, but invalid disposal of compost for wool-scouring would cause unrecoverable damage, which has a potential influence on human-health and the environment.The objective of the current thesis is to figure out the dynamic and inherent mechanism of wool scouring for solid wastes. The experiment was conducted with three kinds of microbial agents affecting the compost fermentation of wool wastes, which were achieved by adding EM (Treatment 1), BYM (Treatment 2) and compound microbial inoculants (Treatment 3). Also involved was one controlled "blank" treatment without any microorganisms. The temperature, moisture, pH, total nitrogen (N) content, total phosphorus (P2O5) content, total potassium (K2O) content, organic matter concentration, carbon to nitrogen ratio (C/N) and seed germination index (SGI) in compost were determined to evaluate the best ration of cost-efficiency of microbial agent.The results showed that compared to the treatment 1 and 2, temperature in the treatment 3 increased to 60 ℃ soon after composting commencement, subsequently water content dropped immediately and more sharply than other treatments. As well, final pH value was lowest in the treatment 3. Although reserved total N content was higher in the treatment 1 than that in the treatment 3, but P2O5 and K2O contents in the later treatment were increased 30 d after composting start. Additionally, C/N ratio in the compost pile declined discriminatively in the treatment 3 which suggested a stable status of composting process relatively earlier in this treatment. Compared to the treatments 1 and 2, where EM and BYM were inoculated into the additive substrates, respectively, compound microbial inoculants in the treatment 3 would probably result in a swift and stable compost process, which also tended to sustain for a longer period until improved germinations. Thus, we suggest compound microbial inoculants to be used for scouring and our results can be used for production by using high temperature composting treatment of wool scouring solid wastes and provide a theoretical basis for solid waste.