摘要
相较于Fenton高级氧化深度处理造纸废水,PS无酸高级氧化技术具有无需调节进水pH,药剂稳定等优点。基于此,以某造纸厂废水PS无酸高级氧化处理工程为依托,系统分析了该技术的工艺特点,研究了过硫酸钠、硫酸亚铁、氢氧化钠、聚合氯化铝等处理药剂用量与水量、进水负荷、COD去除量之间的关系。连续运行数据表明,高级氧化深度处理进水COD平均值为116 mg·L^(-1),出水COD平均值为47 mg·L^(-1),可稳定保持在60 mg·L^(-1)以下。过硫酸钠、硫酸亚铁、氢氧化钠及聚合氯化铝的平均投加量分别为0.06、0.12、0.09和0.095kg·m^(-3)(以单位水量计),硫酸亚铁和过硫酸钠的投加摩尔比例为2.0~3.0。采用UV-vis光谱、三维荧光和气相质谱等指纹图谱分析手段对深度处理水样中溶解性有机物(DOM)特性进行了分析,结果表明,中小分子质量的DOM物质比例有所提高,芳香族难生物降解污染物和类腐殖酸均得到了有效降解。此外,对PS无酸高级氧化技术进行了系统工艺分析。以上研究结果可为废水处理中新型高级氧化技术的应用提供参考。
Compared with Fenton advanced oxidation process for pulping and papermaking wastewater treatment,the PS acid-free advanced oxidation process has many advantages of stable reagents,no need to adjust initial pH and so on.Based on the operation data of PS acid-free advanced oxidation process treating the biochemical effluent from a pulp and paper factory,the relationships between the dosage of the chemicals(sodium persulfate,ferrous sulfate,sodium hydroxide and polyaluminium chloride)and water flow,influent load and COD removal amount were systematically analyzed.Continuous running data showed that the average COD of influent was 116 mg·L^(-1),while the average COD of effluent was 47 mg·L^(-1) which was stable below 60 mg·L^(-1).The average dosages of sodium persulfate,ferrous sulfate,sodium hydroxide and polyaluminum chloride were 0.06,0.12,0.09 and 0.095 kg·m^(-3)(as unit volume of wastewater),respectively.Besides,the molar ratio of ferrous sulfate to sodium persulfate was mainly between 2.0 and 3.0.The characteristics of dissolved organic matter(DOM)were characterized by fingerprinting methods such as UV-vis spectroscopy,threedimensional fluorescence and GC-MS.The results showed that the proportions of substances with medium and small molecular weights in DOM increased.Persistent aromatic pollutants and humic acids were effectively degraded during the treatment.The water quality was greatly improved after the advanced treatment.With the reduced operating costs and simplified operation process,the PS acid-free advanced oxidation process can ensure that the effluent meets the discharge requirements.The systematic process analysis of PS acid-free advanced oxidation technology could provide technical support and theoretical reference for the application of advanced oxidation technology in wastewater treatment.
作者
杨收
万金泉
马邕文
王艳
万勇杰
叶刚
YANG Shou;WAN Jinquan;MA Yongwen;WANG Yan;WAN Yongjie;YE Gang(College of Environment and Energy,South China University of Technology,Guangzhou 510006,China;Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center,Guangzhou 510641,China;Sino-Singapore International Joint Research Institute,Guangzhou 510006,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第1期224-235,共12页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(21978102,31670585)
国家重点研发计划项目(2018YFE0110400)。
关键词
制浆造纸废水
PS无酸高级氧化
深度处理
溶解性有机物
pulping and papermaking wastewater
PS acid-free advanced oxidation process
advanced treatment
dissolved organic matters
