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Study of Flocculation-SBR-Fenton Process for Treating Enzyme Wastewater

Cui Pen

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Abstract

With the enzyme wastewater as the object of study,the flocculation-SBR-Fenton experiment method was ascertained.The experimental results showed that:Under the conditions of PAC concentration 0.6 g/L,6 minutes of stirring,70 minutes of flocculation,the CODCr of the wastewater pretreated by flocculation was 44.6%.After 14 h HRT of SBR process,the CODCr removal rate was 89.2%.Afterwards,under Fenton advanced oxidation,the optimum conditions were:FeSO4·7H2O concentration was 3 g/L,H2O2 was 0.8 g/L and the oxidation time was 2.0 h.The final effluent reached the second level of the national discharge standard(GB 8978—1996).

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What this paper is about

With the enzyme wastewater as the object of study,the flocculation-SBR-Fenton experiment method was ascertained.The experimental results showed that:Under the conditions of PAC concentration 0.6 g/L,6 minutes of stirring,70 minutes of flocculation,the CODCr of the wastewater pretreated by flocculation was 44.6%.After 14 h HRT of SBR process,the CODCr removal rate was 89.2%.Afterwards,under Fenton advanced oxidation,the optimum conditions were:FeSO4·7H2O concentration was 3 g/L,H2O2 was 0.8 g/L and the oxidation time was 2.0 h.The final effluent reached the second level of the national discharge standard(GB 8978—1996).

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Available abstract

With the enzyme wastewater as the object of study,the flocculation-SBR-Fenton experiment method was ascertained.The experimental results showed that:Under the conditions of PAC concentration 0.6 g/L,6 minutes of stirring,70 minutes of flocculation,the CODCr of the wastewater pretreated by flocculation was 44.6%.After 14 h HRT of SBR process,the CODCr removal rate was 89.2%.Afterwards,under Fenton advanced oxidation,the optimum conditions were:FeSO4·7H2O concentration was 3 g/L,H2O2 was 0.8 g/L and the oxidation time was 2.0 h.The final effluent reached the second level of the national discharge standard(GB 8978—1996).

Key concepts: Effluent, Flocculation, Wastewater, Chemistry, Pulp and paper industry, Oxidation process, Research Object, Chromatography

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