Primary and secondary sludge composting:: a feasibility study

The disposal of primary and secondary sludge is becoming a string ent problem for the pulp and paper industry. With the increasing costs of traditional disposal such as landfilling, the industry is seeking new alternatives. In this paper, the key parameters for the treatment of sludge to produce a high quality compost are discussed. In particular, the physical and chemical characteristics of the sludge, the composition of the raw materials mix and the design of the composting plant are addressed. A preliminary cost analysis is also presented.