Reclamation of Municipal Wastewater

The feasibility of applying direct advanced treatment to municipal wastewater has been investigated. A. two-stage scheme was implemented. The first stage was direct chemical coagulation of primary effluent using different coagulants to remove suspended solids and reduce the carbon to nitrogen ratio...

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Bibliographic Details
Published inWater science and technology Vol. 21; no. 1; pp. 93 - 99
Main Authors El-Gohary, F A, Abo-Elela, SI, El-Kamah, H M
Format Journal Article
LanguageEnglish
Published London IWA Publishing 01.01.1989
Subjects
Agrochemicals
Ammonia
Chemical coagulation
Coagulants
Coagulation
Effluent treatment
Effluents
Feasibility studies
Ferric chloride
Fish
Municipal wastewater
Nitrification
Overflow
Reclamation
Removal
Sand
Suspended particulate matter
Suspended solids
Wastewater
Wastewater treatment
Water reclamation
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Summary:The feasibility of applying direct advanced treatment to municipal wastewater has been investigated. A. two-stage scheme was implemented. The first stage was direct chemical coagulation of primary effluent using different coagulants to remove suspended solids and reduce the carbon to nitrogen ratio to a range suitable for nitrification. The second stage was biological sand-bed to oxidize ammonia to nitrate. The pilot plant was designed to treat 6m3/day. The results obtained showed that chemical coagulation using ferric chloride gave high quality effluent suitable for agricultural purposes. Nitrification of the 2 chemically treated effluent using sand-bed at an overflow rate of 1.358 m3/m2/d completely eliminated ammonia. Almost complete removal of suspended solids was achieved. Residual COD and BOD values were 45 mg/l and 15,5 mg/l, respectively. Fish biotoxicity was completely eliminated after nitrification process.
Bibliography:ObjectType-Article-2
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ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1989.0010