Treatment of landfill leachate in coagulationflocculation method by using micro zeolite and micro sand
In this study, efficiency of coagulation-flocculation process was evaluated for leachate collected from Pasir Gudang sanitary landfill, Johor, Malaysia. The efficiency of coagulation-flocculation process using micro zeolite and micro sand of different sizes and combined with coagulants and coagul...
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| 格式: | Thesis |
| 语言: | English English English |
| 出版: |
2013
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| 主题: | |
| 在线阅读: | http://eprints.uthm.edu.my/1932/1/24p%20LEE%20MAO%20RUI.pdf http://eprints.uthm.edu.my/1932/2/LEE%20MAO%20RUI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1932/3/LEE%20MAO%20RUI%20WATERMARK.pdf |
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| 总结: | In this study, efficiency of coagulation-flocculation process was evaluated for
leachate collected from Pasir Gudang sanitary landfill, Johor, Malaysia. The
efficiency of coagulation-flocculation process using micro zeolite and micro sand of
different sizes and combined with coagulants and coagulant aids were determined. In
addition, the optimum rapid mixing time and speed, slow mixing time and speed,
settling time of coagulants, settling time of coagulants with polymer, settling time
with polymer and micro zeolite, settling time of coagulants with polymer and micro
sand, pH, dose of coagulants, dose of coagulant aids and dose of micro zeolite and
micro sand were determined. The efficiency of using polyaluminium chloride (PAC)
as a coagulant in the coagulation-flocculation process to remove SS, colour, COD
and ammoniacal nitrogen from semi-aerobic leachate as compared with alum and
ferric chloride were also determined. PAC showed better removal efficiencies when
compared with ferric chloride and alum. The doses of PAC, alum and ferric chloride
were fixed at 2000 mg/L in the determination of the efficiency of micro zeolite and
micro sand. The highest percentage of removal in SS, colour, COD and ammoniacal
nitrogen were 96%, 95%, 58% and 35% for PAC, 89%, 92%, 46% and 26% for alum
and 96%, 84%, 37% and 26% for ferric chloride. The leachate was also treated by
adding coagulant aids, cationic polymer FO4290 SH and anionic polymer AN934
SH. Cationic polymer FO4290 SH achieved higher percentage of removal of SS,
colour, COD and ammoniacal nitrogen compared with anionic polymer AN934 SH.
The particle sizes of the micro zeolite and micro sand was divided into 6 categories
which were 75µm-90 µm, 91 µm -106 µm, 107 µm -125 µm, 126 µm -150 µm, 151
µm -180 µm and 181 µm -212 µm. The micro zeolite was combined with the
coagulant and coagulant aid. The process was repeated by using micro sand. Micro zeolite combination with PAC and cationic polymer (PAC + cationic polymer +
micro zeolite) was found to be more efficient in leachate treatment. |
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