Performance of batch vacuum distillation process with promoters on coke-plant wastewater treatment

“…One of the technologies used for treating such king of effluent is the thermal separation process (Gutiérrez et al, 2011;Fakhru'l-Razi et al, 2009). The use of thermal separation processes, depending on the inflow effluent characteristics can result in a condensate with a high organic load, because of stripping of volatile and semi-volatile compounds, besides a small fraction of non-volatile substances (Mao et al, 2010), which not allows releasing it to the environment or reusing it. Therefore, a complementary treatment step is necessary in order to cost-effectively meet environmental standards.…”

Section: Introductionmentioning

confidence: 99%

UV/H2O2 process performance improvement by ultrafiltration and physicochemical clarification systems for industrial effluent pretreatment

2012

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The present study evaluated the removal of TOC from an effluent with high organic load resulted from the treatment of oil-water emulsion by thermal process. Hollow Fiber Ultrafiltration membrane (HF-UF) and physicochemical clarification process were used as pretreatment options to assess the influence of feed effluent quality on the UV/H2O2 oxidation process. Results for TOC removals showed HF-UF and physicochemical clarification processes can significantly improve the efficiency of UV/H2O2 oxidation process, when compared with the direct effluent oxidation. Reaction time for obtaining a TOC removal higher than 90% was reduced to approximately half of the time needed when no pretreatment was applied. Considering both pretreatment processes it was not possible to notice any significant difference on the UV/H2O2 oxidation process performance. However, the complexity of physicochemical process due to the use of three different chemicals and sludge production made the HF-UF process the best pretreatment alternative, without increasing the Total Dissolved Solids of the effluent, a very important issue when water reuse is considered

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