%0 Journal Article
%@ 09648305
%A Affam, A.C.
%A Chaudhuri, M.
%A Kutty, S.R.M.
%A Muda, K.
%D 2014
%F scholars:5287
%I Elsevier Ltd
%J International Biodeterioration and Biodegradation
%K Biodegradation; Effluent treatment; Pesticides; Sewage; Wastewater, Chlorothalonil; Chlorpyrifos; Cypermethrins; Fenton-SBR; First order kinetics; Industrial effluent discharges; Optimum operating conditions; Sequencing batch reactors, Effluents, biodegradation; bioreactor; chlorpyrifos; cypermethrin; effluent; ultraviolet radiation; waste treatment; wastewater
%P 195-201
%R 10.1016/j.ibiod.2014.06.002
%T UV Fenton and sequencing batch reactor treatment of chlorpyrifos, cypermethrin and chlorothalonil pesticide wastewater
%U https://khub.utp.edu.my/scholars/5287/
%V 93
%X This study examined the effect of operating conditions of UV Fenton pretreatment combined with aerobic sequencing batch reactor on degradation and biodegradability (BOD5/COD ratio) improvement of chlorpyrifos, cypermethrin and chlorothalonil pesticide wastewater. The optimum operating conditions in the pretreatment phase were H2O2/COD molar ratio 2.0, H2O2/Fe2+ molar ratio 25, pH 3 and reaction time 60min and achieved COD and TOC removal were 64.8 and 45.9 for COD and TOC removal, respectively and biodegradabilty (BOD5/COD ratio) improved from 0.02 to 0.31. In the aerobic SBR phase, five different UV Fenton operating conditions were investigated and UV F-SBR 1 appeared to be the most significant (p<0.05). Increasing UV Fenton pretreatment time and combining the pretreated pesticide wastewater and municipal treatment plant wastewater enabled sustenance of the SBR operation. The UV Fenton-SBR (C) achieved COD and TOC removal efficiency of 96.2 and 97.4, respectively after 40d operation at 12hr HRT. Effluent COD, TOC and BOD5 were 24, 19 and 18mgL-1, respectively and BOD5/COD ratio was 0.75. Applying the Monod model, values of the biological first order kinetic constant (Kob), cell yield (Yx/s) and decay coefficients (kd) were 0.1332hr-1, 0.5301 (mg COD mg-1 MLSS) and 0.0072hr-1, respectively. The UV Fenton-SBR (C) process is effective in treatment of pesticide wastewater containing chlorpyrifos, cypermethrin and chlorothalonil to meet Malaysian industrial effluent discharge standard. © 2014 Elsevier Ltd.
%Z cited By 43