System and method for the reduction of the biological oxygen demand level of a flowable waste water

摘要: A system for the treatment of waste water including hydrocarbons and a high biological oxygen demand. Preferably, includes portable platform suitable transport from site to site. reaction vessel defining substantially vertically oriented flow path therethrough flowable is mounted with its lower portion within surrounded by collection basin which receives recycling via trickling down through biomass disposed on packing material vessel. Simultaneously trickle water, ambient air forced upwardly countercurrent provide biomass, enhance over sweep gaseous products Optionally, introduced into biodegradation reactions basin. The may be operated in either batch mode or continuously. method disclosed.