CAJ | 학술논문

印染行业产生的碱减量废水因其高COD和强碱性等特点难以处理。本研究利用含有钙盐的改良型混凝沉淀法和酸析法分别对某企业碱减量废水进行处理，并对药剂的选择、反应温度、反应时间和反应pH进行了探讨。结果表明：18℃条件下，调节pH＝10，CaCl2最佳投加浓度6 g/L，混凝后废水COD降低75％；调节pH＝3，投加PAM进行酸析处理，COD去除率为77％，回收的TA纯度为92％。结合企业要求与废水特点，改良型混凝沉淀法为现阶段适宜的处理方案。
인염행업산생적감감량폐수인기고COD화강감성등특점난이처리。본연구이용함유개염적개량형혼응침정법화산석법분별대모기업감감량폐수진행처리，병대약제적선택、반응온도、반응시간화반응pH진행료탐토。결과표명：18℃조건하，조절pH＝10，CaCl2최가투가농도6 g/L，혼응후폐수COD강저75％；조절pH＝3，투가PAM진행산석처리，COD거제솔위77％，회수적TA순도위92％。결합기업요구여폐수특점，개량형혼응침정법위현계단괄의적처리방안。
Alkali decrementwastewater produced by printing and dyeing industries is difficult to treat because of its high COD and strong alkaline.In this paper, pretreatmentof alkali decrementwastewaterusingthe method of coagulation with calcium salts and acideduction were discussed.Various influencing factors such as selection of reagents, reaction temperature, reaction time, pHval-ue were discussed as well.The results indicated that the value of COD decreased 75%by coagulationat 18℃.The most economi-cal dosage ofCaCl2 is 6 g/Land flocculation pH is 10.When pH is 3,COD removal efficiencyreached 77% and terephthalic acid can be recycled with a purity of 92%by acid eduction.PAM was added in this procedure.Based on the business demand and the wastewater characteristics, coagulation method should be used in preference.