维生素B_1制药废水处理方法探试

针对维生素B1制药废水有机物浓度高、悬浮物高、色度深、难降解的特点,采用混凝-氧化-铁炭微电解工艺进行处理。试验对混凝剂的种类与用量、pH值、微电解的运行方式及炭铁体积比等进行了优化,最佳工况为:氯化铁用量为150 mg/L,次氯酸钠用量为40 mL/L,炭铁体积比为1∶1.5,曝气加搅拌的微电解方式运行40 min。在进水COD、SS的质量浓度分别为1 500、2 650 mg/L,色度为80倍时,经该工艺处理后,出水COD的质量浓度为164 mg/L,去除率为89.1%,悬浮物和色度去除率分别为97.6%、98%,达到《污水综合排放标准》(GB8978-1996)二级标准。

Study on processes for treatment of wastewater from vitamine B1 production

In view of the characteristics of the wastewater from vitamine B1 production that the organic matter concentration,the suspended solid concentration are high,the colority is dark and hard degradable,the process of coagulation-oxidation-iron carbon microelectrolysis was used for its treatment.The category and dosage of the coagulant,the pH value,the operation style of the microelectrolysis and the volume ratio of C to Fe were optimized through the test,the optimal operation condition was: the dosage of ferric chloride and sodium hypochlorite were 150 mg/L and 40 mL/L respectively,the volume ratio of C to Fe was 1 ∶ 1.5,the reaction time of microelectrolysis was 40 min with the style of aeration and stiring.When the mass concentration of COD,SS were 1 500,2 650 mg/L,the colority was 80 times,through the treatment,the mass concentration of COD in effluent water was 164 mg/L,the removal rate was 89.1%,meanwhile,the removal rate of suspended solid and colority were 97.6% and 98% respec-tively,which met the specification for grade 2 in Integrated Wastewater Discharge Standard(GB 8978-1996).