[Veterinary and sanitary estimation of rapid technique of composting of cattle manual]
2009
Birukov, K.N., All-Russia Research and Development Inst. of Veterinary Sanitation, Hygiene and Ecology, Moscow (Russian Federation)
There is presented a process scheme of rapid manual composting (RMC) in bioenzyme based on controlling the development of aerobic bacteria by aeration of compost mixtures by forced delivering of air. Studied were cattle manual, organic substrate from manual, sawdust and straw, as well as processed organic substrate (compost). Processes of forming technological regimes: changing the compost temperature and pH when fermenting and determining the efficacy of decontamination of manual when actively compositing were studied in bioemzyme loaded as a prepared organic mass with test-objects placed into it. Studying the dynamics of changing the temperature of compost mass with regard to the duration biofermentation (8 to 168 hours) has shown that active increasing the temperature of the compost mass consisting of cattle manual, sawdust and straw under RMC takes place after 24 h. In this period the temperatures in all layers of the manual being fermented reaches +65.7-65.8 degrees C succeeded by increasing up to +76.1-76.2 degrees C (at day 4) proving activation of thermophilic processes. Before fermentation pH of native manual was 6.5-6.7, and the original compost substrate – 7.9, in 48 h of fermentation it decreased up to 7.5, in 5-6 days – up to 7.1-7.2, then remaining unchanged. Under RMC of cattle test-objects Escherichia coli 0139 and Salmonella dublin dies after 72 h (3 days), Staphylococcus aureus 209-P – after 120 h (5 days). It is concluded that RMC is an effective biotechnological method to decontaminate it so as to produce ecologically safe fertilizer b to protect the environment from contamination with organic waste
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