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Study on the Decentralized Wastewater Treatment Plants in Khulna

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dc.contributor.advisor Alamgir, Prof. Dr. Muhammed
dc.contributor.author Saha, Shuma Rani
dc.date.accessioned 2018-08-12T14:31:20Z
dc.date.available 2018-08-12T14:31:20Z
dc.date.copyright 2014
dc.date.issued 2014-07
dc.identifier.other ID 1101553
dc.identifier.uri http://hdl.handle.net/20.500.12228/346
dc.description This thesis is submitted to the Department of Civil Engineering, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Science in Civil Engineering, July 2014. en_US
dc.description Cataloged from PDF Version of Thesis.
dc.description Includes bibliographical references (pages 99-110).
dc.description.abstract Khulna is the third largest city of Bangladesh and situated at the Southwest region of the country having 1.4 million populations living in 45.65 square kilometres area. It has been facing growing urban environmental problems due to daily generated wastewater. There is no sewerage network or any central treatment system in Khulna city. Conventional wastewater treatment plant needs large space for treating vast quantities of wastewater and also requires very high initial as well as operation and maintenance cost. This study is concerned about the two decentralized wastewater treatment (DEWAT) plants constructed at the Peoples Panchtola Colony' at Khalishpur in Khulna. DEWAT system may be defined as the collection treatment, and disposal or reuse of wastewater from individual homes, clusters of homes, isolated communities, industries or industrial facilities at or near the point of waste generation. It consists of septic tank, anaerobic baffled reactors (ABR), anaerobic filter bed baffled reactors (AFBBR), planted gravel filter (PGF) and polishing pond (PP). The specific objectives of this study were to (1) study the performance of two DEWAT plants regarding its technical and socio-economic acceptance by ordinary population in Panchtola Colony; (2) compare the performance of two DEWAT plants based on field and laboratory investigations; (3) identify the technical problems in the operation and maintenance of two DEWAT plants; and (4) recommend the modified DEWAT plants which will reduce construction cost and require small space above ground and low maintenance. To conduct necessary investigation both in field and laboratory, wastewater samples were collected from six different points such as in and out point of settler tank, middle of AFBBR, out of ABR, out of PGF, out of PP of two DEWAT plants at once a month for about one year. Different parameters such as BOD5, COD, pH, Nitrate, Phosphate, Temperature, Oil and Grease, Total Dissolve Solid (TDS), Faecal Coliform (FC), Dissolve Oxygen (DO), Total Suspended Solid (TSS), etc. were determined of the collected samples. The results show that the concentration of all harmful parameters were reduced significantly and lowered to an acceptable level. The results also indicate the effectiveness of ABR and AFBBR over the planted gravel filter considering the area required for PGF and the associated cost. The clogging is also a problem in the filter bed. Finally, it can be concluded that the modified DEWAT system can be practiced in low incoming developing countries as a mid-term solution to improve the sanitation condition. en_US
dc.description.statementofresponsibility Shuma Rani Saha
dc.format.extent 128 pages
dc.language.iso en_US en_US
dc.publisher Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh en_US
dc.rights Khulna University of Engineering & Technology (KUET) thesis/dissertation/internship reports are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.
dc.subject Wastewater en_US
dc.subject Waste Management en_US
dc.subject Wastewater Treatment en_US
dc.subject Wastewater - Khulna - Bangladesh en_US
dc.title Study on the Decentralized Wastewater Treatment Plants in Khulna en_US
dc.type Thesis en_US
dc.description.degree Master of Science in Civil Engineering
dc.contributor.department Department of Civil Engineering


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