超声-电絮凝联合处理高磷改性酯化淀粉废水

-39-第30卷第3期苏州市职业大学学报Vol.30，No.32019年9月JournalofSuzhouVocationalUniversitySep.，2019超声-电絮凝联合处理高磷改性酯化淀粉废水俞晟(苏州市职业大学教育与人文学院，江苏苏州215104)摘要：为实现高效低耗高磷改性酯化淀粉废水达标排放，采用超声-铁电阳极联合工艺，在水力停留时间为0.8h条件下，以超声-电絮凝为主要单元，处理300m3/d酯化淀粉调节池废水。结果表明：优化铁阳极工作电压和超声工作频率分别为10V和30kHz，“调节池+超声-电絮凝装置+滤池+活性炭滤池”出水COD、BOD、TP和SS由6300±176mg/L、2910±172mg/L、68.2±4.2mg/L和1920±107mg/L削减至《淀粉工业水污染物排放标准》(GB25461-2010)间接排放标准要求对应标准值.该工艺高效解决COD、BOD、TP和SS出水水质超标问题，且设备原材料就地取材、“以废治废”，企业稳定运行27.4个月即可收回设备成本.关键词：酯化淀粉废水；铁电阳极；电絮凝；超声中图分类号：X798文献标志码：A文章编号：1008-5475(2019)03-0039-07TreatmentsofElectrocoagulationwithUltrasoniconWastewaterofEsterizedStarchContainingHighPhosphorusContentYUSheng(SchoolofEducationandHumanities，SuzhouVocationalUniversity，Suzhou215104，China)Abstract：Toachievethedischargestandardof‘DischargeStandardofWaterPollutantsforStarchIndustry’thehigh-efficiencyandlow-consumptioncombined-treatment-processoftheferroelectric-anodeelectrocoagulationwithultrasoniconthewastewateroftheesterizedstarchcontaininghighphosphoruscontentwerecarriedout.Undertheconditionofeffectivehydraulicretentiontime(HRT)of0.8h，the30m3/deffluentsfromsodiumtripolyphosphatecross-linkedmodifiedstarchwastewaterwastreatedbythemainprocessesoftheelectrocoagulationwithultrasonic.Itwasshownthattheoptimizedconditionsoftheanodevoltagesandultrasonicfrequenciesoftheelectrocoagulationwithultrasoniconthestarchwastewaterswere10Vand30kHz，respectively.TheCOD，BOD，TPandSSconcentrationswerereducedrespectivelyfromtheconcentrationsof6300±176mg/L，2910±172mg/L，68.2±4.2mg/Land1920±107mg/LtotheconcentrationsofthewaterqualityvaluesoftheIndirectChargeLevelsof‘DischargeStandardofWaterPollutantsforStarchIndustry’withthehelpoftheimprovedprocessesof“regulatingpool，electrocoagulationwithultrasonic，filterandactivatedcarbonfilter”tofigureouttheunstable，evenexceeded，troublesofCOD，BOD，TPandSSfromtheoriginalprocesseswithintheproductioncycletimeof10d.Moreover，therawmaterialsofelectrocoagulationwithultrasonicdevicescouldbegatheredandmadelocallybyusingwasteirontotreatwastewater.Thecal