摘要：The feasibility of enhancing biodegradability of raw latex centrifuging effluent by solar photofenton process was investigated. The raw latex had a low biodegradability as determined by BOD5/COD ratio (0.19.). The effects of operating variables viz., pH, concentration of H2O2, dosage of Fe2+ , depth of wastewater and contact time were studied. In photofenton treatment, COD reduction of 72% was observed at pH 5 and H2O2/ Fe2+ molar ratio 50:1 after 3 hrs irradiation and this photofenton oxidation led to an increase in the BOD5/COD ratio (0.19 to 0.4) of raw latex effluent after oxidation time of 3 hrs. The feasibility of further degradation of photo- treated wastewater by biological treatment (SBR) was also investigated and the effect of MLSS concentration was studied. Biological treatment of phototreated wastewater was conducted in a batch activated sludge reactor (SBR). Separate batch runs were conducted with the wastewater that was given 3 hrs and 5 hrs photochemical treatment time. In the biological process, 86% BOD reduction and 75% COD reduction were observed. As a conclusion, it can be suggested that photofenton oxidation treatment can be placed before biological treatment to remove the non-biodegradable organic pollutants present in the latex wastewater and phototreated wastewater was found to be bio-compatible.
