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1、畢業(yè)設(shè)計(jì)（論文）中文摘要UASB-接觸氧化法處理石化廢水設(shè)計(jì)摘要：高濃度、高甲醛含量的有機(jī)廢水，水質(zhì)復(fù)雜，且可生化性較差，如果直接進(jìn)行常規(guī)的生化處理會(huì)影響其正常運(yùn)行和處理效果。采用UASB加好氧處理的聯(lián)合工藝，廢水首先通過(guò)UASB進(jìn)行生物降解，把復(fù)雜的有機(jī)物降解轉(zhuǎn)化為簡(jiǎn)單的、小分子有機(jī)物，提高了廢水的可生化性，UASB對(duì)有機(jī)物的去除率為80%-90%，再通過(guò)接觸氧化池得到凈化，使出水達(dá)標(biāo)排放。UASB內(nèi)污泥濃度高，平均污泥濃度為20－40gVSS/L，有機(jī)負(fù)荷高，水力停留時(shí)間短，無(wú)混合攪拌設(shè)備，靠發(fā)酵過(guò)程中產(chǎn)生的沼氣的上升運(yùn)動(dòng)，使污泥床上部的污泥處于懸浮
2、狀態(tài)，對(duì)下部的污泥層也有一定程度的攪動(dòng)，污泥床不填載體，節(jié)省造價(jià)及避免因填料發(fā)生堵塞問(wèn)題，UASB內(nèi)設(shè)三相分離器，被沉淀區(qū)分離出來(lái)的污泥重新回到污泥床反應(yīng)區(qū)內(nèi)，可以不設(shè)沉淀池和污泥回流設(shè)備。接觸氧化法具有有機(jī)負(fù)荷高、處理效果好、能耗少、濾料不結(jié)團(tuán)、不堵塞、傳質(zhì)效率高、安裝管理方便等優(yōu)點(diǎn)。關(guān)鍵詞：石化廢水UASB接觸氧化畢業(yè)設(shè)計(jì)（論文）外文摘要ProcessDesignofUASB-contactoxidationforpetrochemicalWastewaterAbstract:Organicwastewaterwithhighdensityandhi
3、ghformaldehydecontentwillbepossessionofcomplexityandpoorbiodegradability.Onconditionthatdirectingconventionalandbiologicaltreatmentwouldhaveeffectonitsnormaloperationanddisposalimpact.UASBaerobictreatmentincreasesthejointprocess:thewastewaterfirstgetacrossintheUASB,whichhavehighb
4、iodegradability,thencomplicatedorganiccompoundwilldecompoundsintoordinary,smallorganicmolecules,andthisstepwillarisethebiodegradabilityofthewastewater,theremovalrateofUASBis80%-90%.Afterwardtheordinary,smallorganicmoleculeswillgetthroughcontactoxidationpoolstopurifyusingwaterdisc
5、hargestandard.SludgeintheUASBhavehighconcentrations,andtheaverageconcentrationwillbe20-40gVSS/L.UASBisprovidedwithhighorganicburthen,andhydraulicretentiontimeisshort,withnomixer,theincreasedmovementatthedepartmentofsludgesuspendedstateisproducedbythefermentationprocessonmarshgas,
6、thelowerlayerofsludgeisalsoacertaindegreeofagitation.Thesludgebedwithnocarrierwillsavecostsandavoidtroublesarousedbywadjam.UASBhavethree-phaseseparatorinside,sludgeseparatedbysedimentationareareturntothereactorzoneofsludgebed,andnosedimentationareaandreturningequipmentisrequired.
7、Contactoxidationmethodhaveadvantagesuchas,highorganicburthen,admirableimpact,lowenergyconsumption,sievewithnocommix,noplug,transferefficaciously,constructandmanageeasily.Keywords:petrochemicalwastewater;UASB;contactoxidation目錄1引言12工藝方案的選擇22.1石化廢水處理技術(shù)介紹22.1.1含酚廢水的處理技術(shù)22.1.2石油裂解生產(chǎn)廢
8、水處理32.1.3酚醛樹(shù)脂生產(chǎn)廢水處理42.1.4含氮廢水處理52.2本設(shè)計(jì)工藝
