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The lack of water resources and water pollution has become one of the crisis faced by China and the world. Solve the water shortage problem, in addition to water conservation, the depth of the sewage treatment and recycling is the only way. The complex composition of wheat straw pulp papermaking midcourse wastewater pollutant load, account for a large proportion of the papermaking wastewater is the focus of pollution control. Pulp and paper mill wastewater treatment is mostly limited to primary treatment and secondary treatment stage, most of the wastewater color lignin derivatives are difficult decolorizing wastewater discharge also presents a deep color, COD Cr higher levels, you can not achieve the requirements of the new emission standards, so depth treatment of secondary effluent from pulp papermaking wastewater, further reduce the effluent COD Cr , color degree, improve water quality, environmental protection and the development of the paper industry has important significance and broad application prospects. In this study, the Fe / Cu micro-electrolysis-Fenton method and flocculation and sedimentation method combined with advanced treatment midcourse wastewater. Research: screened a Jiaoyou the several commonly used flocculant flocculants, and discuss the best experimental conditions; through the static experimental study Fe / C and of Fe / Cu micro-electrolysis-Fenton method and coagulation and sedimentation method of influencing factors, and processing methods operating conditions and process parameters; continuous dynamic experimental treatment midcourse wastewater in the better conditions. The study results show that: the relatively PAC (PAC), ferric chloride (the FeCl 3 ) and sulfuric acid, aluminum (Al 2 (SO 4 ) 3 ), Al 2 (SO 4 ) 3 has certain advantages, Al , 2 (SO 4 ) 3 optimal experimental conditions: the dosage of 900mg / L, pH = 7, the reaction time of 16 min, the velocity gradient (G ) 23 s-1. Select flocculant stirring intensity and reaction time must be changed, otherwise can not get a good coagulation effect. -The middle depth treatment of the Fe / C micro-electrolysis-Fenton reagent wastewater experimental conditions: Fe / C = 2, hydrogen peroxide (H2O2) dosage of 1.4 mL / L, influent pH = 3. Fe / Cu microelectrolysis best experimental conditions: Fe / Cu = 300, pH = 7, the dosage of H2O2 in 1.4 mL / L. Fe / Cu combination of relative Fe / C consumption slow, replacement filler cycle, filler as microelectrolysis reaction. Microelectrolysis have a good effect on color removal. The continuous dynamic experiments start the best parameters are as follows: pH value of 7; Fe / Cu = 300; the micro electrolytic reaction time of 90 minutes; H2O2 dosage of 1.4 m1 / L; aluminum sulphate flocculant dosage of 500 mg / L,. COD Cr removal with the same cycle treatment time decreasing 48 hours prior to the early stage of treatment , of COD Cr removal in more than 70% of the final COD Cr , the color removal rate reached 85.7% and 98%, the water quality is good. Fe / Cu depth treatment of micro-electrolysis-Fenton reagent method and the combined process of coagulation and sedimentation midcourse wastewater economy viable, small footprint, low investment and operating costs, with scrap copper shavings replace the activated carbon, can effectively prevent compaction with less has a good prospect.
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