Guidelines for design of an integrated instream water reclamation system supported by a high-performance aeration weir
Guidelines for design of an integrated instream water reclamation system supported by a high-performance aeration weir
In arid and semi arid regions, reuse of drainage water for irrigation can dramatically increase the overall water use efficiency. In Egypt, introduction of raw sewage in agricultural drains increases the health risks associated with the reuse of drainage water. The essential treatment in this case can readily be achieved by waste stabilization ponds, but in Egypt where fertile land is very expensive, an instream water reclamation system is suggested as an alternative to the pond system.
This thesis investigates the possibility of establishing a two reach system in open drains supported by a drop structure that can improve the self-purification process in streams to achieve reduced risk in the reuse of drainage water. The US-EPA water quality model Qua12EU has been used to study the influence of the physical dimensions of the drain on the water quality and to determine the modified design of the drain that can achieve the required level of treatment. The simulation results indicate that for a given discharge of 0.5m3/s and initial BOD concentration of 40 mg/l, increasing the cross-sectional area of the first reach to 24 m2 for a length of 0.6km succeeded in providing sufficient retention time to lower the BOD concentration to around 10 mg/l. However, the major draw back of the proposed reclamation system was identified as the lack of oxygen supply in the first reach, which resulted in the initiation of undesired anaerobic biological processes and consequently aeration weirs were suggested to assist in the oxygenation of the water.
Experimental results for two physical models of an innovative design of a lateral outflow drop structure achieved a three fold increase in aeration efficiency over that of linear weirs, especially at low heads and flow rates. The aeration efficiency of the lateral outflow was fond to be 55-60% for a one metre drop operating under flow rates that ranged between 10 and 100 l/s/m, which corresponds to 24.46% for linear conventional weirs.
University of Southampton
Bayoumi, Mohamed Nabil
a94fd9a8-e849-4fee-b05f-b64e3f57d5bf
1997
Bayoumi, Mohamed Nabil
a94fd9a8-e849-4fee-b05f-b64e3f57d5bf
Bayoumi, Mohamed Nabil
(1997)
Guidelines for design of an integrated instream water reclamation system supported by a high-performance aeration weir.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
In arid and semi arid regions, reuse of drainage water for irrigation can dramatically increase the overall water use efficiency. In Egypt, introduction of raw sewage in agricultural drains increases the health risks associated with the reuse of drainage water. The essential treatment in this case can readily be achieved by waste stabilization ponds, but in Egypt where fertile land is very expensive, an instream water reclamation system is suggested as an alternative to the pond system.
This thesis investigates the possibility of establishing a two reach system in open drains supported by a drop structure that can improve the self-purification process in streams to achieve reduced risk in the reuse of drainage water. The US-EPA water quality model Qua12EU has been used to study the influence of the physical dimensions of the drain on the water quality and to determine the modified design of the drain that can achieve the required level of treatment. The simulation results indicate that for a given discharge of 0.5m3/s and initial BOD concentration of 40 mg/l, increasing the cross-sectional area of the first reach to 24 m2 for a length of 0.6km succeeded in providing sufficient retention time to lower the BOD concentration to around 10 mg/l. However, the major draw back of the proposed reclamation system was identified as the lack of oxygen supply in the first reach, which resulted in the initiation of undesired anaerobic biological processes and consequently aeration weirs were suggested to assist in the oxygenation of the water.
Experimental results for two physical models of an innovative design of a lateral outflow drop structure achieved a three fold increase in aeration efficiency over that of linear weirs, especially at low heads and flow rates. The aeration efficiency of the lateral outflow was fond to be 55-60% for a one metre drop operating under flow rates that ranged between 10 and 100 l/s/m, which corresponds to 24.46% for linear conventional weirs.
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Published date: 1997
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Local EPrints ID: 463132
URI: http://eprints.soton.ac.uk/id/eprint/463132
PURE UUID: abb58e53-8ba6-464a-83ce-a97458be25ca
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Date deposited: 04 Jul 2022 20:45
Last modified: 23 Jul 2022 01:09
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Author:
Mohamed Nabil Bayoumi
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