||Tertiary Treatment with a Controlled Ecological System.
||Las Virgenes Municipal Water District, Calabasas, Calif.
||EPA-16080-FBH; 06524,; 660/2-73-022
Sewage treatment ;
Water reclamation ;
Chemical removal(Sewage treatment) ;
Tertiary sewage treatment ;
Water pollution control
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
A two-stage pond system was operated as a process for polishing secondary sewage effluent. The shallow first stage was an oxidation pond in which a heavy growth of algae was permitted to develop. In the second stage a population of Daphnia pulex consumed the algae. Detention times were about 10 days in each stage. Chemical and biological monitoring were carried out over a year's period to determine feasibility of using the process to produce recreational-grade water and reduce algae growth potential. (Modified author abstract)