屠宰废水处理方案设计.doc

河南机电高等专科学校毕业设计

摘要

本设计为屠宰厂生产废水处理设计，设计过程为初步设计。屠宰废水水质的主要特点是含有大量的有机物，属高浓度有机废水，故其生化需氧量也较大。该屠宰废水处理厂的处理水量为400m3/d，不考虑远期发展。原污水中各项指标为BOD浓度为850mg/L，COD浓度为1800mg/L，SS浓度为850mg/L。因该废水BOD值较大，不经处理会对环境造成巨大污染，故要求最终出水水质执行《污水综合排放标准》（GB8978-1996）之二级标准。

经分析知该处理水属易生物降解又无明显毒性的废水，可采用两级生物处理以使出水达标。一级处理主要采用物理法，用来去除水中的悬浮物质和无机物。二级处理主要采用生物法，包括好氧生物处理法中的SBR法，可有效去除水中的BOD、COD。

整个工艺具有投资少，处理效果好，工艺简单，占地面积省，运行稳定，能耗少的优点。

关键词：屠宰废水处理，高浓度有机废水，格栅，气浮机，水解酸化，SBR法

ABSTRACT

Thedesignfortheslaughterfactorywastewatertreatmentdesign,thedesignprocessforpreliminarydesign.Themaincharacteristicsofslaughterhousewastewaterqualityiscontainsalotoforganicmatter,isahighconcentrationoforganicwastewater,thebiochemicaloxygendemandisalsohigh.Thewatertreatmentofslaughterhousewastewatertreatmentplantfor400m3/d,withoutconsideringthelong-termdevelopment.IntheoriginalsewageindicatorsfortheconcentrationofBODwas850mg/L,theconcentrationofCODwas1800mg/L,theconcentrationofSSwas850mg/L.BecausetheBODvalueofthewastewaterislarge,causinggreatpollutiontotheenvironmentwillnotbeprocessed,sotherequirementsofthefinalimplementationofwaterqualityintegratedwastewaterdischargestandard(GB8978-1996)ofthetwogradestandard.

Accordingtoanalysisofthewastewatertreatmentwaterisbiodegradableandnoobvioustoxicity,canusetwostagebiologicaltreatmenttomakewater.Firstlevelofprocessingmainlyusesthephysicalmethod,usedtoremovesuspendedmatterandinorganicmatterinwater.Thetwolevelofprocessingmainlybybiologicalmethod,includingSBRmethodinaerobicbiologicaltreatment,caneffectivelyremoveBOD,COD.

Thewholeprocesshaslessinvestment,goodtreatmenteffect,simpleprocess,smalloccupiedarea,stableoperation,lowpowerconsumptionadvantages.

Keywords:slaughterwastewatertreatment,highconcentrationorganicwastewater,grille,flotationmachine,hydrolysisacidifica