Title: PURIFICATION OF DOMESTIC SEWAGE WITH AND WITHOUT FAECES BY VERTICAL INTERMITTENT FILTRATION IN REED AND RUSH BEDS
Abstract: Two sewage treatment plants based on hydrophyte systems working under practical conditions are described. As one plant is fed with a normal domestic sewage (I), the other one (II) is fed with household waste water without faeces (grey water). Both plants are operated with an intermittent application and a vertical flow of sewage effluents of septic tanks. The used area of the filter beds were 2.5 m2/pers. (I) and 3.0 m2/pers. (II). The mean effluent concentrations for BOD5 (COD) were for I: <4 mg/l (<15 mg/l) and II: <8 mg/l (28 mg/l). Referring to the septic tank effluents anionic tensides were decomposed to more than 95 % in both systems. Remarkable differences in the septic tank effluent concentrations of ammonia and phosphates between both plants were observed: 85.3 mg/l NH4+–N (I) and 2 mg/l (II). The elimination of ammonia in plant I was 70 % and about 41 % of the inorganic nitrogen inflow was removed. Of the low input at plant II about 82 % of the inorganic nitrogen was eliminated. Concentrations of the effluents of the filter beds for total-phosphorus were 2.4 mg/l (I) and 2.0 mg/l (II). As a basis for the dimensioning of a filter bed the space loadings of BOD/COD and ammonia are suggested.
Publication Year: 1990
Publication Date: 1990-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
Access and Citation
Cited By Count: 14
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