Abstract |
Increased sewage flows during storm conditions in most combined sewer systems dictate that most or all of the flow be diverted from treatment facilities directly to the receiving body because the flow exceeds the treatment capacity. If a large amount of the solids can be removed before discharge to the receiving water, a major part of the pollutional load would be removed. The feasibility of developing a self-cleaning, self-adjusting filtering device constructed of cylindrical structures of fibers laid down in predetermined patterns by a winding process and bonded in place by resins was investigated. The permeability of the structure is imparted by a mechanical cracking of crazing of the resin. Filtration runs showed a 62 percent reduction of suspended solids in the filtrate. However, sustained runs could not be realized. The self-cleaning aspect was not demonstrated. (Author) |