本文選題：ABS樹脂廢水 + 深度處理　； 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：ABS樹脂生產(chǎn)過程中產(chǎn)生大量高濃度有機(jī)廢水,其中包含丙烯腈、苯乙烯、丁二烯的聚合物、ABS乳液、松香肥皂、十二烷基硫醇、乙苯及其他未反應(yīng)有機(jī)單體等,屬于典型高N、P,高有機(jī)物,高膠乳廢水。東北一化工廠ABS樹脂廢水,目前經(jīng)過混凝氣浮工藝預(yù)處理后直接進(jìn)入化工污水綜合處理廠進(jìn)行處理,但由于ABS樹脂廢水的特殊性,對該污水處理廠的達(dá)標(biāo)排放造成了一定威脅,為此擬對該ABS樹脂廢水單獨(dú)進(jìn)行處理。論文研究內(nèi)容為國家水體污染控制與治理科技重大專項(xiàng)《松花江石化行業(yè)有毒有機(jī)物全過程控制關(guān)鍵技術(shù)與設(shè)備》的一部分。本文在大量現(xiàn)場調(diào)研及前期混凝氣浮-A/O工藝小試試驗(yàn)的基礎(chǔ)上,針對ABS樹脂廢水生物處理出水的水質(zhì)特征,考察了混凝沉淀工藝對混凝氣浮-A/O出水達(dá)標(biāo)排放的可行性,優(yōu)化了反應(yīng)條件,初步構(gòu)建了ABS樹脂廢水達(dá)標(biāo)處理工藝。并在此基礎(chǔ)上開展了混凝氣浮-A/O-混凝沉淀工藝處理ABS樹脂生產(chǎn)廢水的現(xiàn)場中試試驗(yàn)。獲得的主要結(jié)論如下:(1)混凝劑及助凝劑篩選結(jié)果表明,以三氯化鐵做為混凝劑、陽離子型聚丙烯酰胺為助凝劑對混凝氣浮-A/O工藝出水深度處理效果最佳,且最佳投加量為三氯化鐵200mg/L,陽離子型聚丙烯酰胺為5mg/L,最佳工藝條件為混合攪拌1min,絮凝攪拌15min,沉淀時(shí)間為30min。優(yōu)化工藝條件下混凝沉淀出水TP及COD可穩(wěn)定達(dá)到《合成樹脂工業(yè)污染物排放標(biāo)準(zhǔn)》規(guī)定排放限值,進(jìn)一步過濾處理后可穩(wěn)定達(dá)到特別排放限值。(2)混凝沉淀工藝進(jìn)、出水分子量分布、三維熒光光譜、紅外光譜及紫外光譜分析結(jié)果表明:A/O工藝出水中懸浮有機(jī)物及分子量100kDa以上的大分子物質(zhì)TOC貢獻(xiàn)率為39.45%,混凝沉淀后懸浮有機(jī)物及分子量100kDa以上的大分子物質(zhì)TOC貢獻(xiàn)率減少到20%。經(jīng)過混凝沉淀處理后,出水中蛋白類物質(zhì)減少19%�；炷恋硖幚韱卧\(yùn)行成本約為1元/噸。(3)在水力停留時(shí)間為48h,硝化液回流比為500%的條件下,A/O單元對COD、TP、TN及氨氮的去除率可分別達(dá)到92.16%、42.92%、90.9%、76.13%。進(jìn)水中特征污染物在A/O單元基本被完全去除。混凝沉淀工藝對COD、TP的去除率可分別達(dá)到35.26%、97.32%,出水COD、TP分別為50.36mg/L和0.126mg/L,60%左右的出水COD濃度可降至50mg/L。(4)經(jīng)過混凝氣浮+A/O+混凝沉淀組合工藝處理后,出水中TN、TP、SS及氨氮分別為:9.648mg/L、24.77 mg/L、7.03mg/L、3.24mg/L,去除率分別為90.6%、99.4%、98.3%和81.63%,均能達(dá)到《合成樹脂工業(yè)污染物排放標(biāo)準(zhǔn)》(GB31572-2015)中的特別排放限值。出水COD為51.44mg/L,COD去除率96.2%,可達(dá)到《合成樹脂工業(yè)污染物排放標(biāo)準(zhǔn)》(GB31572-2015)中對COD 60mg/L的排放要求。本研究對實(shí)際ABS樹脂廢水的處理可提供技術(shù)支持。
[Abstract]:During the production of ABS resin, a large amount of high concentration organic wastewater was produced, including acrylonitrile, styrene, butadiene polymer ABS emulsion, rosin soap, dodecyl mercaptan, ethylbenzene and other unreacted organic monomers, etc. It belongs to typical high NNP, high organic matter and high latex wastewater. At present, ABS resin wastewater from the first chemical plant in Northeast China has been pretreated by coagulation and air floatation process and directly entered the chemical wastewater treatment plant for treatment. However, due to the particularity of ABS resin wastewater, the discharge standard of the wastewater treatment plant has been threatened to a certain extent. Therefore, the ABS resin wastewater will be treated separately. The research content of this paper is a part of the key technology and equipment for the whole process control of toxic organic matter in Songhua River petrochemical industry, which is a major scientific and technological project of national water pollution control and control. On the basis of a large number of field investigations and pilot tests of coagulation air floatation (A- / O) process, the feasibility of coagulation sedimentation process for the effluent discharge standard of coagulation flotation-A- /-O was investigated according to the water quality characteristics of biological treatment of ABS resin wastewater. The reaction conditions were optimized and the treatment process of ABS resin wastewater was preliminarily constructed. On the basis of this, a pilot test on treatment of ABS resin production wastewater by coagulation air flotation-A / O-coagulation precipitation process was carried out. The main conclusions are as follows: (1) the screening results of coagulant and coagulant aid show that the advanced treatment effect of flocculating air floatation A / O process with ferric chloride as coagulant and cationic polyacrylamide as coagulant is the best. The optimum dosage of ferric chloride is 200 mg / L, the cationic polyacrylamide is 5 mg / L, the optimum technological conditions are mixed stirring for 1 min, flocculation for 15 minutes and precipitation time for 30 min. Under optimized process conditions, TP and COD of effluent from coagulation and precipitation can reach the prescribed discharge limit value of the Industrial Pollutant discharge Standard of synthetic Resin, and after further filtration treatment, it can reach the special discharge limit value. (2) Coagulation and precipitation process is advanced. Water molecular weight distribution, three dimensional fluorescence spectrum, The results of IR and UV spectra showed that the TOC contribution rate of suspended organic compounds and macromolecular substances with molecular weight above 100kDa was 39.45, while the TOC contribution rate of suspended organic compounds and macromolecular substances with molecular weight above 100kDa decreased to 20 kDa after coagulation and precipitation. After coagulation and precipitation treatment, the amount of protein in effluent decreased by 19%. The operating cost of coagulation and precipitation treatment unit is about 1 yuan / ton. (3) under the condition of 48h HRT and 500% reflux ratio of nitrifying liquid, the removal rates of CODN TPTN and NH3-N by A- / O unit can reach 92.16% ~ 42.92N ~ (99. 9) and 76.13% respectively. The characteristic pollutants in the influent were basically removed completely in the A / O unit. The removal rate of CODN TP by coagulation precipitation process can reach 35.26% and 97.32% respectively. The COD concentration of effluent with COD of 50.36 mg / L and 0.126 mg / L of 60% respectively can be reduced to 50 mg / L. (4) after the combined process of coagulation flotation / A- / O coagulation and precipitation, the COD concentration of effluent can be reduced to 50 mg / L. (4) after the treatment of coagulation floatation, the concentration of COD in the effluent can be reduced to 50 mg 路L ~ (-1) 路L ~ (-1). In the effluent, the TPSS and NH3-N were: 9. 648 mg / L = 24.77 mg / L = 7.03 mg / L = 3.24 mg / L, respectively, and the removal rates were 90.6% and 99.4% respectively, and 81.63%, respectively, which could reach the special emission limit of the Industrial Pollutant discharge Standard for synthetic Resin (GB31572-2015). The COD removal rate of effluent is 51.44 mg 路L ~ (-1) 路L ~ (-1), which can meet the requirement of COD ~ (60 mg / L) in the Industrial Pollutant discharge Standard of synthetic Resin (GB31572-2015). This study can provide technical support for the treatment of ABS resin wastewater.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X783.2

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