INTENSIFIED MSW COMPOSTING WITH LEACHATE RECIRCULATED INOCULATION

摘要

A novel composting approach with microbial inoculation was advanced in bench scale for the exploration of the feasibility of the strengthening of the degradation of organic fraction of municipal solid waste (OFMSW). A sort of microbial inoculum was harvested after the recirculated cultivation of the leachate derived from OFMSW aerobic composting with the injection of additive nutrition. In this work, emphasis was placed on the impact of the microbial inoculum on OFMSW composting. Two groups of tests were conducted for the assessment of seeding effects in terms of composting parameters (temperature, Ph, oxygen uptake rate, cellulase, microbial numbers, and nitrogen concentration). The microbial inoculum was inoculated into the refuse initially (1 % in weight) with the completion of a 3-round pre- fermentation domestication. It is found that the temperature parameter lasts half day longer over 55°C , and that the numbers of thermal bacteria, actinomyces, molds increase approximately 100%, 70%, 50%, respectively in the seeded refuse after a 20-d primary fermentation. The Ph maintains 7. 0 with slight fluctuation benefiting the microbial behaviors of cellulose depletion. The oxygen uptake rate (OUR) and cellulase activity ascend some 50%, 26% respectively. The nitrogen concentration also performs virtue that the inoculated microorganisms held the potential to endure the extreme temperature. Hence, conclusion can be drawn that this composting process facilitates the OFMSW decomposition.