Non-biodegradable landfill leachate treatment by combined process of agitation, coagulation, SBR and filtration
In: Waste management (Elmsford), Jg. 34 (2014), Heft 2, S. 439-447
academicJournal
- print, 3/4 p
Zugriff:
This study describes the complete treatment of non-biodegradable landfill leachate by combined treatment processes. The processes consist of agitation as a novel stripping method used to overcome the ammonia toxicity regarding aerobic microorganisms. The NH3-N removal ratio was 93.9% obtained at pH 11.5 and a gradient velocity (G) 150 s-1 within a five-hour agitation time. By poly ferric sulphate (PFS) coagulation followed the agitation process; chemical oxygen demand (COD) and biological oxygen demand (BOD5) were removed at 70.6% and 49.4%, respectively at an optimum dose of 1200 mg L-1 at pH 5.0. The biodegradable ratio BOD5/COD was improved from 0.18 to 0.31 during pretreatment step by agitation and PFS coagulation. Thereafter, the effluent was diluted with sewage at a different ratio before it was subjected to sequencing batch reactor (SBR) treatment. Up to 93.3% BOD5, 95.5% COD and 98.1% NH3-N removal were achieved by SBR operated under anoxic-aerobic-anoxic conditions. The filtration process was carried out using sand and carbon as a dual filter media as polishing process. The final effluent concentration of COD, BOD5, suspended solid (SS), NH3-N and total organic carbon (TOC) were 72.4 mg L-1, 22.8 mg L-1, 24.2 mg L-1, 18.4 mg L-1 and 50.8 mg L-1 respectively, which met the discharge standard. The results indicated that a combined process of agitation-coagulation-SBR and filtration effectively eliminated pollutant loading from landfill leachate.
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Non-biodegradable landfill leachate treatment by combined process of agitation, coagulation, SBR and filtration
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Autor/in / Beteiligte Person: | ABOOD, Alkhafaji R ; JIANGUO, BAO ; JIANGKUN, DU ; DAN, ZHENG ; YE, LUO |
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Zeitschrift: | Waste management (Elmsford), Jg. 34 (2014), Heft 2, S. 439-447 |
Veröffentlichung: | Kidlington: Elsevier, 2014 |
Medientyp: | academicJournal |
Umfang: | print, 3/4 p |
ISSN: | 0956-053X (print) |
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