-16- 



dry ton, compared to $116 to $13A for trenching, $57 to $93 for incineration, 

 and $62 to $115 for heat drying (Colacicco et al. , Feb. 1977). Efficiencies 

 developed with experience have further reduced the cost. 



The sludge composting project has been well received by town residents. 

 There are no odor problems unless anaerobic conditions have developed, and 

 requests for the finished product have been exceeding production. The Town 

 of Durham Public Works Department has itself been using substantial quanti- 

 ties of the finished product for town beautif ication, roadside stabilization, 

 turf improvement, etc. Any compost not utilized by the town is quickly re- 

 moved by residents. 



It appears that composting is a good and viable sludge disposal method 

 for towns such as Durham with low concentrations of heavy metals in the 

 sludge. 



