[Fenton oxidation cooperated with PFS coagulation and SBR for deepen treating a mature landfill leachate].
The method of Fenton oxidation cooperated with PFS coagulation and SBR for deep treating aged landfill leachate was investigated. The deep treatment based on the effluent need reach the landfill leachate national discharge standard I , and lower operating costs. Under the influent condition of COD concentration 640 mg x L(-1) and chroma 500, the optimal reaction conditions of Fenton oxidation cooperated with PFS coagulation were recommended. Operating at the dosage of PFS = 0.45 mL x L(-1), the dosage of [Fe2+] = 0.006 mol x L(-1), the dosage of [H2O2] = 0.006 mol x L(-1), reaction time 4 h, the dosage of Na2CO3 = 0.7 g x L(-1), the dosage of 0.1% PAM = 2 mLL x L(-1). After this technics, the effluent COD concentration 68 mg x L(-1), chroma reached 2, SS concentration 10 mg x L(-1)), BOD concentration 20 mg x L(-1). Besides, using PFS coagulation before the Fenton oxidation has the advantage of decreasing costs and canceling pH accommodation. All reagents costs of the PFS coagulation and the Fenton oxidation is Yen 3.2 per ton. The effluent quality of SBR after the advanced oxidation: COD < or =80 mg x L(-1), BOD < or =8 mg x L(-1), NH4+ -N < or =3 mg x L(-1), chroma < or =5, SS < or =10 mg x L(-1), the final results reach the landfill leachate national discharge standard I (GB16889-1997).
Zhou
Shao-qi
SQ
School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China. fesqzhou@scut.edu.cn
Zhong
Hong-chun
HC
Hu
Yong-chun
YC
D019149:Bioreactors; D005290:Ferric Compounds / Q000737:chemistry*; D005427:Flocculation; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D010084:Oxidation-Reduction; D012037:Refuse Disposal / Q000379:methods; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
C045076:Fenton's reagent; D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; C024823:ferric sulfate; D006861:Hydrogen Peroxide; D007501:Iron