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RISS 인기검색어
- 검색키워드
- 저자 : ( Ramasaini T. ) (검색결과 1 건)
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DISPOSAL OF LEACHATES COLLECTED FROM THE CO-DISPOSAL OF SOLID WASTE GENERATED IN A CHEMICAL INDUSTRY
( Gnanamani A. ),( Sekaran G. ),( Rajamani S. ),( Sadulla S. ),( Ramasaini T. ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.1
Manufacture of dicarboxylic acid from the raw material benzene leaves behind a polymeric material which has very high tendency to solidify. The solidified product is dumped on the open ground as one of the suggested methods for the disposal. The land co-disposal of solid product is subjected to climatinc conditions leading to leaching of the compound into deep soil pit, constructed near the land co-disposal site. The solid waste was characterized by pH 2.11, BOD by 12000 mg/1, COD 38857 mg/1, TOC 19380 mg/1 and VFA 24170 mg/1. The poor biodegrdable nature of the leachate, indexed by BOD/COD ratio (0.31), renders the conventional treatment technologies followed for the degradation of components of leachate were ineffective and thus disposal problem remains unsolved. Hence, advanced wastewater treatment technology was the opted technology for the disposal of the leachate of the solid product. In the present investigation acidified dichromate, Fenton reagent and Hydrogen peroxide/activated carbon catalyst mixture were attempted to fission the intermolecular and intramolecular bonding in the polymeric compound. After cataytic oxidation with acidified dichromate the BOD and COD values were found to be 3900 and 6406 mg/1. However, cleavage of bonding in polymeric compound was accompanied with conversion of hexavalent chromium into trivalent chromium offering heavy metal contamination. Oxidation of leachate sample with Fenton reagent was able to reduce BOD and COD values respectively to 2100 mg/1 and 5441 mg/1. However, The treated compound had the evidence of heavy metal contamination. Solid waste samples were oxidised with hydrophilic mesoporous activated carbon/H₂O₂ mixture to obtain BOD and COD values respectively 2300 mg/1 and 5471 mg/1. The Activated carbon/H₂O₂ catalysed solid waste samples have recorded marked improvement in anaerobic biological treatment. After anaerobic biological treatment the BOD and COD values have been reduced to 300 mg/1 and 621 mg/1 respectively. Further reduction BOD and COD values were achived in aerobic biological treatment. The scheme of process followed for the treatment and the variables that control the catalytic oxidation process, and anaerobic treatment of catalytic oxidised sample is discussed.
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