發(fā)布時(shí)間：2018-03-24 19:02

  本文選題：油庫含油污水　切入點(diǎn)：沿海　出處：《浙江海洋大學(xué)》2017年碩士論文

【摘要】：沿海地區(qū)的油庫在生產(chǎn)經(jīng)營中不可避免的會產(chǎn)生含油污水,污水量大,水中的油類和COD含量高,屬于難降解的有機(jī)廢水。水污染嚴(yán)重、水資源緊缺已成為人們?nèi)粘ｊP(guān)注的焦點(diǎn)問題,超濾膜處理法具有高效、綠色、低耗等優(yōu)點(diǎn),在廢水處理領(lǐng)域的應(yīng)用越來越廣泛。論文討論了沿海油庫產(chǎn)生含油污水的來源,概述了各類常用的處理方法,介紹了超濾膜分離法凈化含油廢水的現(xiàn)狀。本次實(shí)驗(yàn),考察了不同因素下納米改性超濾膜膜通量的變化,綜合比較后得到了其運(yùn)行的最適宜條件;考察了酸性、堿性溶液對超濾膜的清洗效果;對混凝-超濾工藝凈化含油污水的效果進(jìn)行了評價(jià),采集處理水樣本進(jìn)行了測量。實(shí)驗(yàn)取得的主要結(jié)論有:試驗(yàn)所用超濾膜的適宜壓力為0.12 MPa;在室溫下,超濾分離法可以有效去除廢水中的油類、COD等雜質(zhì),得到優(yōu)質(zhì)的處理水:油類的平均去除率為94.14%,COD的平均去除率為83.96%;進(jìn)水口水質(zhì)的變化不影響出水水質(zhì),超濾膜的穩(wěn)定性好;膜通量隨時(shí)間減小,并趨近于穩(wěn)定在250L/(m2·h)左右;使用0.2mol/L的HCl溶液或0.08 mol/L的NaOH溶液清洗20 min超濾膜是比較經(jīng)濟(jì)的;混凝預(yù)處理可以有效減小超濾分離的負(fù)荷,延長超濾膜的使用年限;經(jīng)過混凝-超濾組合工藝處理后,污水中的油類物質(zhì)和COD的總?cè)コ士梢赃_(dá)到了95%、90%,出水穩(wěn)定、水質(zhì)好,可以實(shí)現(xiàn)不同途徑的回用。含油污水處理后可以再次利用,有利于緩解水資源緊缺的現(xiàn)狀,實(shí)現(xiàn)石化行業(yè)的綠色生產(chǎn)。
[Abstract]:Oil depots in coastal areas will inevitably produce oily sewage in production and management. The water is polluted with a large amount of water, and the content of oil and COD in the water is high, so it belongs to the organic wastewater which is difficult to degrade. The water pollution is serious. Water resources shortage has become the focus of daily attention. Ultrafiltration membrane treatment has the advantages of high efficiency, green and low consumption, and has been used more and more widely in the field of wastewater treatment. This paper discusses the source of oily sewage produced by coastal oil depots. Various common treatment methods were summarized, and the present situation of ultrafiltration membrane separation process for purifying oily wastewater was introduced. In this experiment, the changes of membrane flux of nano-modified ultrafiltration membrane under different factors were investigated, and the optimum operating conditions were obtained after comprehensive comparison. The cleaning effect of acidic and alkaline solution on ultrafiltration membrane and the effect of coagulation-ultrafiltration process on the purification of oily wastewater were investigated. The main conclusions are as follows: the suitable pressure of the ultrafiltration membrane used in the experiment is 0.12 MPa; at room temperature, the impurities such as oil and COD in wastewater can be effectively removed by ultrafiltration separation. The quality of treated water was obtained: the average removal rate of oil was 94.14% and the average removal rate of COD was 83.96; the change of inlet water quality did not affect the effluent quality, the stability of ultrafiltration membrane was good; the membrane flux decreased with time, and the membrane flux tended to be stable at 250L/(m2 h or so. It is economical to use 0.2mol/L HCl solution or 0.08 mol/L NaOH solution to clean 20 min ultrafiltration membrane, coagulation pretreatment can effectively reduce the load of ultrafiltration separation and prolong the service life of ultrafiltration membrane. The total removal rate of oily substances and COD in sewage can reach 95% 90%, the effluent is stable, the water quality is good, and different ways of reuse can be realized. After the treatment of oily sewage, it can be reused, which is conducive to alleviating the current situation of water resources shortage. To realize green production in petrochemical industry.
【學(xué)位授予單位】：浙江海洋大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X74

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本文編號：1659614