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A feasibility study in eThekwini municipality on Anaerobic digestion for the treatment of toxic and High Strength organic wastes: A study of the business case of treating high strength Industrial Wastes
Expanded Title:This study is follows on from work conducted by Sacks, 1998 and a previous WRC project (K5/1074 Co-digestion of high strength/toxic organic effluents in anaerobic digesters). These previous studies investigated largely the scientific basis for operating a co-digestion service and the methods that may be used to assess high strength toxic industrial effluents. This study looks more closely at the implementation of such a specialised municipal organic liquid waste treatment facility scheme within the eThekwini Municipality using the Southern Wastewater Treatment Works as a case study. The aims of this study are to evaluate the market opportunity and the capacity of the existing infrastructure at SWWTW, assess the potential for energy generation, and evaluate the human resource needs, operating expenses and tariff structures that will be required to make such a facility economically attractive. Project K5/1538 concluded that the co-digestion scheme has the potential to provide a service to industries that is environmentally attractive. However, this scenario is currently not financially viable since the total cost of operating it is estimated to be approximate 23 % higher than the current cost of disposal to landfill and 6 times more expensive than using the marine pipeline in Durban. The study also highlights that the realisation of this potential is critically dependent on the successful co-digestion of liquid effluents that are characterised as highly hazardous since these are the most expensive to dispose of to landfill. It is recommended that for each new waste stream an experimental investigation be conducted to confirm suitability for co-digestion. Based on existing and obtainable data from industry, this study showed that the market size is still not large enough to make this option economically feasible.
Date Published:01/04/2009
Document Type:Research Report
Document Subjects:Wastewater Management - Sludge management, Wastewater Management - Sewers, Sanitation - On site sanitation, Sanitation - Waterborne sanitation
Document Keywords:Technology
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:1538/1/09
ISBN No:978-1-77005-818-7
Authors:Buckley CA; Brouckaert CJ
Project No:K5/1538
Originator:WRC
Organizations:University of KwaZuIu-Natal
Document Size:520 KB
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