The influence of biodegradability of sewer solids for the management of CSOs
Sakrabani, R.; Ashley, R.M.; Vollertsen, J.
Water Science and Technology a Journal of the International Association on Water Pollution Research 51(2): 89-97
2005
ISSN/ISBN: 0273-1223 PMID: 15790232 Document Number: 588465
The re-suspension of sediments in combined sewers and the associated pollutants into the bulk water during wet weather flows can cause pollutants to be carried further downstream to receiving waters or discharged via Combined Sewer Overflows (CSO). A typical pollutograph shows the trend of released bulk pollutants with time but does not consider information on the biodegradability of these pollutants. A new prediction methodology based on Oxygen Utilisation Rate (respirometric method) and Erosionmeter (laboratory device replicating in-sewer erosion) experiments is proposed which is able to predict the trends in biodegradability during in-sewer sediment erosion in wet weather conditions. The proposed new prediction methodology is also based on COD fractionation techniques.