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Biology of Multi Cell Ponds Treating Municipal Wastes
Author(s) -
Patil H. S.,
Meti G. M.,
Hosetti B. B.
Publication year - 1993
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19930780216
Subject(s) - facultative , chlorella vulgaris , stabilization pond , effluent , biology , euglena gracilis , anaerobic exercise , rotifer , chlorophyta , algae , zoology , ecology , environmental engineering , environmental science , physiology , biochemistry , chloroplast , gene
Observations were made over a period of one year on the performance of multi stage stabilization ponds treating domestic waste waters. The unit is composed of Primary anaerobic (P 1 ) and two consecutive Secondary (P 2 ) and Tertiary (P 3 ) facultative ponds. The overall reduction in BOD, bacteria, PO 4 , SO 4 , NH 3 N, Cl − and total solids were 89.4, 99.8, 76.2, 47.7, 79.7, 18.6 and 74.0 percent, respectively. Elimination of H 2 S was 84.8% in the final effluents. Chlorella vulgaris was found to be the dominant alga followed by Euglena, Ankistrodesmus, Phacus and Synedra as subdominant forms. 9 species of protozoa have been recorded in the first pond and their number declined in the successive ponds.