本文選題：石油裂化催化劑廢水 + 電絮凝　； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：石油化工掌握著國(guó)家的經(jīng)濟(jì)命脈,與我們的日常生活息息相關(guān)。石油裂化催化劑生產(chǎn)過(guò)程中產(chǎn)生大量高氨氮、高懸浮物廢水,目前應(yīng)用的廢水處理工藝存在曝氣能耗高、藥劑消耗大、運(yùn)行成本過(guò)高、基建費(fèi)用高及營(yíng)養(yǎng)物質(zhì)(N素)去除效率低等問(wèn)題,如何對(duì)廢水進(jìn)行高效的預(yù)處理和脫氮是石化企業(yè)亟需解決的難題。試驗(yàn)研究新型電絮凝-CANON組合工藝處理石油裂化催化劑廢水,考察電絮凝對(duì)廢水預(yù)處理的最佳運(yùn)行參數(shù);以厭氧氨氧化膨脹顆粒污泥床(expanded-granular sludge bed,EGSB)為載體,研究CANON工藝的啟動(dòng)參數(shù)及電絮凝-CANON組合工藝的運(yùn)行效能;模擬污水處理廠四季溫度的變化對(duì)反應(yīng)器處理效能的影響,并對(duì)組合工藝與水廠目前的處理工藝進(jìn)行經(jīng)濟(jì)效益對(duì)比分析。結(jié)果表明,電絮凝具有處理效率高,抗擊原水水質(zhì)的波動(dòng)的優(yōu)點(diǎn),能減輕后續(xù)生化處理單元的負(fù)荷。通過(guò)單因素和正交試驗(yàn)確定電絮凝處理石油裂化催化劑生產(chǎn)廢水的最優(yōu)運(yùn)行參數(shù):p H9.0,極板間距1.5cm,電流密度25m A/cm2,電解時(shí)間25min;在最佳的運(yùn)行參數(shù)下,電絮凝預(yù)處理出水水質(zhì)高,濁度和COD去除率分別在97%和30%以上;電絮凝主要運(yùn)行成本為鋁陽(yáng)極損耗,占總運(yùn)行成本(約1.88元/m3)的59.57%。EGSB厭氧氨氧化反應(yīng)器由厭氧條件轉(zhuǎn)為微氧狀態(tài),通過(guò)添加硝化污泥來(lái)啟動(dòng)CANON工藝。通過(guò)控制反應(yīng)器的運(yùn)行參數(shù):溫度T(30±0.5)℃,DO(0.5±0.05)mg/L,p H 7.5~8.2,經(jīng)過(guò)40d的短暫運(yùn)行,成功啟動(dòng)CANON工藝。TN去除率最高達(dá)到62%,TN去除負(fù)荷最高達(dá)到0.189kg N/(m3?d)。利用電絮凝-CANON組合工藝處理石油裂化催化劑生產(chǎn)廢水,COD平均去除率為60.03%,TN平均去除率為67.30%,TN平均去除負(fù)荷為0.07kg N?m-3?d-1,出水COD100mg/L,NH4+-N10mg/L。模擬污水處理廠四季溫度的變化,研究不同溫度條件下(28,30,33℃)組合工藝的運(yùn)行效果,結(jié)果表明:在不同的溫度條件下,組合工藝的出水水質(zhì)均能滿足石化企業(yè)的排放標(biāo)準(zhǔn);與28℃、30℃相比,33℃條件下,CANON工藝的脫氮效率最高,氨氮去除負(fù)荷均值至0.14kg N/(m3?d),總氮去除負(fù)荷最高至0.15kg N/(m3?d),均值為0.12kg N/(m3?d),TN去除率均值為67.6%。工程經(jīng)濟(jì)性分析表明:電絮凝-CANON工藝與某石化公司目前應(yīng)用的處理工藝相比,在基建費(fèi)用及運(yùn)行成本具有很大的優(yōu)勢(shì)�？蓽p少占地面積1740m3,節(jié)省工程造價(jià)約64.67%,節(jié)省374.03萬(wàn)元/年的運(yùn)行費(fèi),是比較有前景的處理工藝。
[Abstract]:Petrochemical industry holds the national economic lifeline and is closely related to our daily life.A large amount of wastewater containing high ammonia nitrogen and high suspended solids is produced in the production of petroleum cracking catalyst. The wastewater treatment process used at present has high energy consumption of aeration, large consumption of chemicals and high operating cost.The problems of high cost of capital construction and low removal efficiency of nutrient N) make it an urgent problem for petrochemical enterprises to pretreat and denitrify wastewater efficiently.The treatment of petroleum cracking catalyst wastewater by a new type of electroflocculation-CANON combination process was studied, and the optimum operating parameters of electroflocculation on the pretreatment of wastewater were investigated, and the anaerobic ammonia oxidation granular sludge bed expanded-granular sludge bedded EGSBs was used as the carrier.The start-up parameters of CANON process and the operation efficiency of electroflocculation-CANON combination process were studied, and the effects of four seasons temperature change on the reactor treatment efficiency were simulated.The economic benefits of the combined process and the current treatment process of the water plant are compared and analyzed.The results show that electroflocculation has the advantages of high treatment efficiency, resisting the fluctuation of raw water quality, and can reduce the load of subsequent biochemical treatment unit.Through single factor and orthogonal test, the optimum operating parameters of electroflocculation for treating wastewater from petroleum cracking catalyst production were determined: 1: pH9.0, 1.5 cm between polar plates, 25mA / cm2 current density and 25min electrolysis time. Under the optimum operating parameters, the effluent quality of electroflocculation pretreatment was high.The removal rates of turbidity and COD were above 97% and 30%, respectively, and the main operating cost of electroflocculation was aluminum anode loss, which accounted for 1.88 yuan / m ~ (3) of the total operating cost of 59.57%.EGSB anaerobic ammonia oxidation reactor, which changed from anaerobic condition to micro-oxygen state.The CANON process was initiated by adding nitrified sludge.The operating parameters of the reactor were controlled as follows: temperature T _ (30 鹵0.5) 鈩，

本文編號(hào)：1745254