【摘要】：玉米深加工行業(yè)耗水大、污染重,其生產(chǎn)過程會產(chǎn)生大量高濃度有機廢水,末端治理難度很大,如處理處置不當(dāng)排入水體,會造成嚴(yán)重的水體污染。在水資源日趨緊張及玉米深加工行業(yè)污染物排放標(biāo)準(zhǔn)趨嚴(yán)的形勢下,做好玉米深加工廢水處理與回用技術(shù)升級,實現(xiàn)廢水資源化利用,是促進玉米深加工行業(yè)持續(xù)健康發(fā)展的關(guān)鍵。本文是以吉林省內(nèi)某玉米開發(fā)有限公司作為依托,針對企業(yè)廢水處理工藝技術(shù)升級存在的A/O工藝進水(EGSB出水)總磷較高、COD較低、C/N較低、污染物去除效果不穩(wěn)定等問題,以企業(yè)EGSB出水引入部分EGSB進水(高濃度有機廢水作為補充碳源)混合后作為試驗原水,開展了化學(xué)除磷與A/O-MBR組合工藝處理玉米深加工廢水的試驗研究。本研究主要包括浸沒式A/O-MBR試驗裝置的設(shè)計、制作與搭建及調(diào)式運行,化學(xué)除磷藥劑及組合投加優(yōu)化研究,A/O-MBR處理玉米深加工廢水的效能研究,膜污染及其清洗技術(shù)研究等四個方面內(nèi)容,旨在為依托企業(yè)的廢水處理工藝技術(shù)升級改造提供技術(shù)支持�；瘜W(xué)除磷藥劑及組合投加優(yōu)化研究表明,PAC、CaO組合順序投加,總磷TP可獲得穩(wěn)定、預(yù)期的去除效果;試驗原水TP濃度在75.3~86.0mg/L之間,PAC投加700mg/L、CaO投加600mg/L順序投加時,總磷去除率達96.85%,出水的總磷含量穩(wěn)定在2.46~2.85mg/L之間,pH在8.427~8.534之間,其處理后的水質(zhì)滿足后續(xù)生化處理工藝的運行需要,試驗結(jié)果具有重復(fù)性�？梢�,化學(xué)除磷作為A/O-MBR工藝的預(yù)處理單元適用、可行。A/O-MBR工藝處理玉米深加工廢水的效能試驗研究表明,A/O-MBR系統(tǒng)對玉米深加工廢水中污染物具有穩(wěn)定的去除效果,運行十分穩(wěn)定,系統(tǒng)出水中COD、NH_4~+-N、TN、SS和濁度優(yōu)于《循環(huán)冷卻水用再生水水質(zhì)標(biāo)準(zhǔn)》(HG/T3923-2007)對水質(zhì)的要求,同時滿足《淀粉工業(yè)水污染物排放標(biāo)準(zhǔn)》(GB25461-2010)中的間排標(biāo)準(zhǔn)要求,其中COD、NH_4~+-N、SS和濁度等指標(biāo)優(yōu)于直排標(biāo)準(zhǔn)的要求。膜污染及其清洗技術(shù)試驗研究表明,采用掃面電鏡(SEM)等手段,分析了膜污染形成及污染組份,制定出了體外離線化學(xué)清洗的方案,清洗后膜通量可以恢復(fù)98%以上。綜上所述,采用化學(xué)除磷與MBR組合工藝處理玉米深加工廢水具有應(yīng)用性和經(jīng)濟效益,可作為依托企業(yè)的廢水處理工藝技術(shù)升級改造的工藝方案。
[Abstract]:The corn deep processing industry consumes a lot of water and pollutes heavily. A large number of high concentration organic wastewater will be produced in the production process, and the terminal treatment is very difficult. If the treatment and disposal is not properly discharged into the water body, it will cause serious water pollution. Under the situation of increasing shortage of water resources and stricter discharge standards of pollutants in corn deep processing industry, we should upgrade the treatment and reuse technology of corn deep processing wastewater and realize the utilization of wastewater resources. It is the key to promote the sustainable and healthy development of corn deep processing industry. Based on a corn development co., Ltd in Jilin Province, aiming at the upgrading of wastewater treatment process technology, the total phosphorus (EGSB effluent) of A / O process is higher, COD is lower, and C / N is lower. The removal effect of pollutants is unstable. The effluent of enterprise EGSB is mixed with part of EGSB influent (high concentration organic wastewater as supplementary carbon source) as the raw water of the experiment. An experimental study on the treatment of corn deep processing wastewater by chemical phosphorus removal and A/O-MBR combined process was carried out. This study mainly includes the design, manufacture and construction and adjustment operation of immersion A/O-MBR test device, the optimization of chemical phosphorus removal agents and combined addition, and the study on the efficiency of A/O-MBR in the treatment of corn deep processing wastewater. The purpose of this paper is to provide technical support for the upgrading and transformation of wastewater treatment technology in order to provide technical support for the upgrading and transformation of wastewater treatment technology. The optimization of chemical phosphorus removal agent and combination addition showed that the total phosphorus TP could be stable and the expected removal effect could be obtained by adding PAC,CaO in sequence. When the concentration of TP in raw water is between 75.3~86.0mg/L, the concentration of PAC is 700 mg 路L, the removal rate of total phosphorus is 96.85%, and the content of total phosphorus in effluent is stable between 2.46~2.85mg/L and Cao, the removal rate of total phosphorus is 96.85%. The pH is between 8.427 and 8.534. The treated water quality meets the operation needs of the subsequent biochemical treatment process, and the test results are repeatable. It can be seen that chemical phosphorus removal is suitable and feasible as the pretreatment unit of A/O-MBR process. The experimental study on the efficiency of A/O-MBR process in the treatment of corn deep processing wastewater shows that, The A/O-MBR system has a stable removal effect on pollutants in corn deep processing wastewater, and the operation is very stable. COD,NH_4~-N in the effluent of the system, COD,NH_4~, SS and turbidity are better than the Water quality Standard for Recycling cooling Water (HG/T3923-2007), and meet the requirements of discharge Standard for Water pollutants in starch Industry (GB25461-2010), in which COD,NH_4~-N, SS and turbidity are better than the requirements of direct discharge standard. The experimental study on membrane fouling and cleaning technology shows that the membrane fouling formation and fouling components are analyzed by scanning electron microscopy (SEM), and the off-line chemical cleaning scheme in vitro is worked out. The flux of membrane can be restored to more than 98% after cleaning. To sum up, the combined process of chemical phosphorus removal and MBR has application and economic benefits in the treatment of corn deep processing wastewater, which can be used as a process scheme for upgrading and reforming the wastewater treatment technology based on enterprises.
【學(xué)位授予單位】：長春工程學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X712

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