Beijing Sludge /Biosolids Master Plan

Wilson, T.E.1, Yang, X., Ding, C.2, Howard, J.A.3, Shen, C.-W.1, 1Earth Tech, 2Beijing Drainage District, 3BHC Consultants, Seattle WA, USA


Beijing, China currently transports dewatered, digested and undigested sludges to rural areas for stockpiling and traditional
agricultural use. As the city grows, this is no longer a viable option. Several new wastewater treatment plants are expected
to be on-line by 2008 which will nearly double the current sludge production. This study recommends that Beijing use
combined heat drying/composting as the primary utilization strategy. It also recommends Beijing divert as much sludge as
practical to pre-calciner type cement kilns for air pollution control, and to conventional cement kilns as supplemental fuel to
be burned with coal and limestone.

Sludge, Biosolids, China, heat-drying, composting, cement kilns

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