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008 230399s1993 th uzm rtt 00| a1eng d
035 _a.b10248316
099 9 _aAIT Thesis no.EV-93-22
100 0 _aMaung Maung Soe
245 1 0 _aEnhancement of river self-purification systems using the rock bed filtration method
260 _aBangkok :
_bAsian Institute of Technology,
_c1993
300 _a70, [32] leaves +
_e1 online resource
490 1 _aThesis ;
_vno. EV-93-22
500 _aA thesis submitted in partial fulfilment of the requirement for the degree of Master of Engineering
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1993
520 _aAll natural water environment e. g. rivers, has a self-purification capacity which help improve their quality through reduction of BOD and recovery of DO, when some pollutants are discharged into them. Rock bed filtration is one of such methods to enhance the self-purification capacity of rivers and other water resources. Two pilot-scale rock bed reactors were constructed and experiments were carried out using two types of rock media with under two conditions of non-aeration and aeration systems. In the non-aeration system, two parallel filters were separately filled with broken bricks in the first reactor and whole bricks in the second reactor at a mean BOD loading of 22 g BOD/m2.d of first reactor and 18 g BOD/m2.d of second reactor. After two months operation, both rock bed reactors were supplied with the aeration inside and at the bottom of the reactor at a mean BOD loading of 16 g BOD/m2.d of first reactor and 17 g BOD/m2.d of second reactor. The experimental results revealed that the rock bed reactor with aeration system showed an over-all superiority in purification efficiency as compared with the non-aeration system. It can be concluded that, the rock bed filtration method is a low-cost and least-maintenance technique to treat the moderately-polluted water.
650 0 _aWater
_xPurification
_xFiltration
700 1 _aFujii, Shigeo,
_eChairperson
700 1 _aMurthy, D.V.S.,
_eExamination committee
700 1 _aLee, Seong-Key,
_eExamination committee
710 2 _aDeutscher Akademischer Austauschdienst (DAAD),
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-93-22
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B16671
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