Assessment of Biological Treatment Technology for Local Pollutants in Mines

The Pheretima califonica is chosen in the paper to explore the technical feasibility of processing poultry manure with earthworms in practical applications. Three technical parameters including inoculum amount of agents, thickness of buffer layer and density needed for processing fresh chicken manure outdoors by earthworms are studied and determined. The sample inspections were performed to examine water quality before and after digesting and processing chicken manure by earthworms. As can be concluded from the result, it is feasible to process fresh chicken manure by earthworms directly under outdoor environment. The optimal technical parameters are summarized as: same inoculum amount of EM agent and nitrifying bacteria agent (each with 10mL/300g of fresh chicken manure), 4cm thickness pavement of attapulgite buffer layer and the density of 12 earthworms in terms of 300g of fresh chicken manure. The water quality after digesting and degrading chicken manure by earthworms shows the obvious changes and increases in the content of inorganic nitrogen.