摘要
针对某煤化工企业典型的高盐高COD废水,分别通过芬顿氧化和电催化氧化两种高级氧化工艺对废水中COD进行处理。考察了加药量、加药比例和pH等因素对芬顿氧化的影响,以及电流密度和pH等因素对电催化氧化的影响,并对比了两种处理工艺的COD去除效果和技术优缺点。结果表明芬顿氧化的最佳条件下COD去除率最高达到42.8%;电催化氧化的COD去除率与电流密度的大小呈显著正相关,最高可达99.9%。通过对两种高级氧化技术的分析对比得出,芬顿氧化的处理成本低,工艺成熟度高,已具有大规模工业应用的经验,但COD去除率有限和铁泥难以利用的问题亟待解决。电催化氧化具有工艺流程短,COD去除率可调控,无二次污染,但电耗成本高,电极寿命短,尚不具备大规模应用的条件。
Two advanced oxidation processes,Fenton oxidation and electrocatalytic oxidation,were explored to treat organic substance of the saility wastewater from a coal chemical industry enterprise.The effects of dosage,proportion and pH on Fenton oxidation,and the effects of current density and pH on electro catalytic oxidation were investigated.The COD removal effects and technical advantages and disadvantages of the two processes were compared.The results showed that the highest COD removal rate was 42.8%under the optimal conditon of Fenton oxidation.As for electro catalytic oxidation,the COD removal rate was positively correlated with the current density,up to 99.9%.Through the comparison of two advanced oxidation processes,it is concluded that Fenton oxidation has the advantages of low cost,high process maturity and large-scale industrial projects,but the problems of limited COD removal rate and difficult utilization of iron sludge still need to be solved.Electrocatalytic oxidation has the advantages of short process flow,adjustable COD removal rate and no secondary pollution,but it is not suitable for large-scale application due to high power consumption cost and short electrode life.
作者
齐全友
郝雨峰
罗纯仁
程子洪
陈成
高志刚
佟振伟
钟振成
QI Quan-you;HAO Yu-feng;LUO Chun-ren;CHENG Zi-hong;CHEN Cheng;GAO Zhi-gang;TONG Zhen-wei;ZHONG Zhen-cheng(Inner Mongolia Guohua Hulun Buir Power Generation Company Limited,Hulun Buir,Inner Mongolia 021025,China;National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China)
出处
《煤炭加工与综合利用》
CAS
2021年第12期63-68,共6页
Coal Processing & Comprehensive Utilization
关键词
水处理
煤化工废水
芬顿氧化
电催化氧化
water treatment
coal chemical industry wastewater
Fenton oxidation
electrocatalytic oxidation
