摘要
为探究制药废水中难生化有机物的有效降解方法,本文采用“电Fenton+生物电化学”联合处理制药废水,通过三维荧光光谱(EEMs)及气相色谱-质谱联用法(GC-MS)分析进、出水中溶解性有机物(DOM)和难生化有机物的降解效果,结果如下。(1)采用电Fenton预处理制药废水,对废水COD_(Cr)的平均去除率为28.75%±1.29%,对四氢呋喃的平均去除率为41.18%±2.95%,初步降低废水生物毒性,实现了制药废水的良好预处理效果。(2)电化学生物反应器对制药废水的化学需氧量(COD_(Cr))有显著的降解效果且明显优于单一生物膜反应器。其中电化学生物反应器运行39天,COD_(Cr)从(3438.30~4775.70)mg/L降至(20.18~331.09)mg/L,平均去除率达95.89%±1.63%;单一生物膜反应器运行10天,COD_(Cr)从(3943.90~4631.20)mg/L降至(345.08~1264.3)mg/L,平均去除率为79.86%±6.21%。(3)制药废水中溶解性有机物成分以酪氨酸类蛋白、色氨酸类蛋白、溶解性微生物副产物(SMPs)为主,电化学生物反应器对3个区域的荧光组分降解效果明显,去除率分别为58.88%、37.16%和36.26%。(4)针对制药废水中的主要难生化有机物四氢呋喃,电化学生物反应器可实现四氢呋喃的有效降解,四氢呋喃去除率高达97.65%。本研究从COD_(Cr)去除率、EEMs降解效果和难生化有机物降解效果三方面考察生物电化学系统对制药废水的处理效果,为电化学生物反应器在制药废水处理领域的应用提供科学依据。
The“electro-Fenton+bioelectrochemistry”was used to treat pharmaceutical wastewater,and degradation effect of dissolved organic matter(DOM)and refractory organic matters was analyzed to explore the effective degradation of refractory organics in pharmaceutical wastewater by three-dimensional fluorescence spectroscopy(EEMs)and gas chromatography-mass spectrometry(GC-MS).When Electro-Fenton was used to pretreat pharmaceutical wastewater,the average removal rate of COD_(Cr)in wastewater was28.75%±1.29%,and the average removal rate of tetrahydrofuran was 41.18%±2.95%,which initially reduced the biological toxicity of wastewater and achieved good pre-treatment of pharmaceutical wastewater.The electrochemical bioreactor had a significant degradation effect on the chemical oxygen demand(COD_(Cr))of pharmaceutical wastewater and was significantly better than the single biofilm reactor.After the electrochemical bioreactor operated for 39 days,COD_(Cr)was decreased from(3438.30—4775.70)mg/L to(20.18—331.09)mg/L,and the average removal rate was 95.89%±1.63%;after the single biofilm reactor operated for 10 days,COD_(Cr)was decreased from(3943.90—4631.20)mg/L to(345.08—1264.3)mg/L,and the average removal rate was 79.86%±6.21%.The soluble organic components in the pharmaceutical wastewater were mainly tyrosine-like proteins,tryptophan-like proteins and soluble microbial by-products(SMPs).The electrochemistry bioreactor had a significant degradation effect on the fluorescent components in the 3 areas with the removal rates of 58.88%,37.16%and 36.26%respectively.Tetrahydrofuran,the main refractory organic matter in pharmaceutical wastewater,could be effectively degraded by the electrochemistry bioreactor,and the removal rate of tetrahydrofuran was as high as 97.65%.This study investigated the treatment effect of bioelectrochemical system on pharmaceutical wastewater from the three aspects of COD_(Cr)removal rate,EEMs degradation effect and refractory organics degradation effect,and provided a scientific basis for
作者
许亚兵
王宝山
汪光宗
张洋
XU Yabing;WANG Baoshan;WANG Guangzong;ZHANG Yang(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China;Key Laboratory of Yellow River Water Environment in Gansu Province,Lanzhou 730070,Gansu,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2022年第9期5055-5064,共10页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(51368029)
甘肃省重点研发计划(17YF1FA114)
甘肃省2020年度重点人才项目(2020RCXM082)。
关键词
废水
药物
电化学生物反应器
有机化合物
waste water
pharmaceuticals
electrochemistry bioreactors
organic compounds
