| Abstract:The primary goal of the study is to remove the volatile phenol which is the key precursor of aromatic halides, and reduce the productions of POPs and AOX in pulp and paper production by using bamboo as fiber raw material. The alkaline papermaking wastewater was directly used as ash-washing water in a water film scrubber. The composition of alkaline papermaking wastewater was polluted-condensate water and concentrated washing and bleaching water. The polluted-condensate water was pretreated by using fly ash of boiler flue gas, and the alkaline water was used as desulfurization at the same time. It achieved the purpose of wastewater treatment by using waste and reduced treatment cost. The results showed that, pH of wastewater decreased from an average of 9.8 to 8.6, CODCr removal rate of 75.8%, SS removal rate of 27.9%, volatile phenol removal rate of 76.5%. Volatile phenols in wastewater discharge could meet the standard A of “Integrated Wastewater Discharge Standard” (GB-8978—1996) when the pretreated waste water was further treated by the biological treatment system. Boiler fly ash removal rate of 95%, SO2 removal rate of 80%, which reached (GB13271—2001) Type II slot Ⅱ emission limits. The fly ash adsorbed volatile phenol was used for bricks making, volatile phenol turned into carbon dioxide and vapor at high temperatures to avoid secondary pollution. The investment of industrial application of the process was about ￥0.6 million. The industrial application achieved a comprehensive utilization of the waste and wastewater treatment by using waste, and also effectively reduced the investment and operating costs. |
