| Spent filter backwash water (SFBW) and clarifier sludge comprise the majority of the waste streams from conventional surface water treatment plants and collectively are referred to as combined filter backwash water (CFBW).; This research was conducted for the purpose of determining the feasibility of: (i) gravity thickening, (ii) sedimentation with reflocculation, (iii) dissolved air flotation with reflocculation, and (iv) ultrafiltration for the treatment of CFBW to a quality that was equal to or better than that of the source water quality.; A single, 200 L representative residual sample was collected from a conventional surface water treatment plant and the quality was found to be very poor and depended highly on the raw water quality and treatment processes used. THM concentrations were found to be very low. The water quality from the optimal trials met or exceeded the average raw water quality of the source water for all measured parameters, with the exception of manganese. (Abstract shortened by UMI.)... |
