Use of municipal solid waste compost and waste water biosolids with co-composting process.

A pilot-scale active aeration bioreactor was studied for co-composting of municipal solid waste (MSW) and wastewater biosolids (WB). The weight ratio of the MSW to wastewater biosolids was 3:1 (dry solid basis). Obtaining compost from municipal solid waste, in comparison with other methods of solid waste disposal especially incineration, is cheaper and more economical, as in suburbs suitable fertilizers can be obtained with little investment for the development of urban green space or for sale. On the other hand, one of the problems of municipal wastewater treatment is the problem of sludge disposal. Co-composting manure can be acquired by combining these two so it overcomes the problems of municipal solid waste and wastewater treatment and finally the produced fertilizer is used for agricultural, horticultural, etc. In the second stage, to remove heavy metals and enhance the C/N ratio, Clinoptilolite and sawdust have been used.The goal of this study was the better understanding the effect of co-composting process of municipal solid waste (MSW) and sewage sludges (SS) and to fully consider the factors in research objectives.