Micro-electrolysis treatment of eucalyptus CTMP effluent

Eucalyptus CTMP effluent was treated with the micro-electrolysis process. The effect of operating conditions, including pH, reacting time, Fe/C volume proportion, iron powder size and amount used in the experiment, on treatment efficiency was studied, and the processing parameters were optimized as well. The result reveals that pH was the vital factor to influence the treating effect, other factors of reacting time, Fe/C volume proportion, iron powder size and amount used in the experiment also had an effect on efficiency and that under the optimum conditions, the removal rate of CODCr and chromaticity was over 50% and 90% and the biodegradability of wastewater was enhanced. In comparison with conventional coagulants, the removal rate of CODCr and chromaticity of micro-electrolysis process was higher than PFS by 21. 7% and 70.5% and higher than PAC by 28.4% and 72.5% under the same conditions.