海绵铁型“铁碳微电解耦合Fenton试剂”法预处理腈纶废水研究

发布时间：2018-05-17 16:05

本文选题：海绵铁/碳微电解技术 + 海绵铁/碳耦合H_2O_2技术　；参考：《兰州交通大学》2017年硕士论文

【摘要】：本课题来源于国家“十二五”水专项相关课题中关于强化去除腈纶废水中有机污染物的要求,并结合吉林化纤集团奇峰股份有限公司腈纶废水的实际处理情况,在试验基地进行海绵铁物化处理腈纶废水的小试研究。主要针对该厂腈纶废水中COD难生物降解的现状,结合海绵铁/碳微电解、海绵铁/碳微电解耦合H_2O_2、海绵铁类Fenton及催化金属对以上技术的强化处理,考察以上物化技术对腈纶废水的去除效果及对生化处理的效果影响。试验以COD作为考察指标,得出以下结论:1、海绵铁/碳微电解技术处理腈纶废水(1)在单因素实验基础上,通过响应面分析对海绵铁/碳微电解技术预处理腈纶废水的工艺条件进行了优化,得到最佳因素组合为:进水p H为2,铁碳质量比为0.5,海绵铁投加量为35g/L,反应时间为75min。在此条件下,COD去除率可达29.59%;(2)海绵铁/碳微电解预处理腈纶废水可提高生化去除效果,在进水COD均值为925.5mg/L条件下,微电解可将其降至648.2mg/L,去除率为29.96%,最终生化出水COD为231.8mg/L,生化去除率为64.24%,累积去除率74.95%,较生化去除率提高12.5%,累积去除率提高23.2%;(3)微电解可将COD均值为314.2mg/L的废水处理厂接触氧化池出水降至198mg/L,而后废水进入生化系统,无去除效果,已达生化去除极限;(4)在响应面优化条件基础上,将铁碳质量比由0.5调整至1后(海绵铁投加量35g/L、进水p H为2、反应时间75min),相比调整之前,微电解去除率由29.96%下降至23.56%,SBBR生化去除率由64.23%下降至59.32%,总去除率由74.95%下降至68.91%;(6)在响应面优化条件基础上,将进水p H由2调整至3、5和原水p H后(海绵铁投加量35g/L,铁碳质量比0.5、反应时间75min),在进水COD均值为752mg/L条件下,进水p H为3时,海绵铁/碳微电解可将COD降至574.9mg/L,再经生化处理,其最终出水COD均值为258.6mg/L;进水p H为5时,微电解可将COD降至596.2mg/L,再经生化处理,其最终出水COD均值为275.4mg/L;进水p H为原始p H时,海绵铁/碳微电解可将COD降至618.6mg/L,再经生化处理,其最终出水COD均值为288.7mg/L;对照组即不经海绵铁/碳预处理的腈纶废水,其最终生化出水COD均值为358.8mg/L。2、海绵铁/碳微电解耦合H_2O_2技术预处理腈纶废水(1)在响应面优化海绵铁/碳微电解条件(海绵铁投加量35g/L、铁碳质量比0.5、进水p H为2、反应时间75min)下,H_2O_2耦合方式为从初始时刻开始,连续流方式投加,投加量最高为3ml/L。H_2O_2投加量分别为1ml/L、2ml/L及3ml/L时,在进水COD为825.9mg/L时,其出水COD分别为414.4mg/L、345.3mg/L和261.6mg/L,去除率分别为49.8%、58.2%和68.3%;(2)在进水COD均值为730.4mg/L条件下,在H_2O_2投加量分别为1ml/L、2ml/L及3ml/L时,预处理可以分别将其COD降至385.3mg/L、306.4mg/L和243.2mg/L,进入SBBR进行生化处理,其最终COD出水均值分别为159.2mg/L、126.4mg/L和88.8mg/L。3、海绵铁耦合H_2O_2技术预处理腈纶废水(1)在进水p H为2,搅拌速度为50r/min,H_2O_2投加量1ml/L、2ml/L及3ml/L时,相对应的海绵铁投加量依次为15g/L、25g/L及35g/L,相对应的反应时间依次为90min,120min及150min,H_2O_2在初始时刻连续流投入的条件下,去除率依次为36.1%,45.5%,58.1%;(2)在H_2O_2投加量分别为1ml/L、2ml/L及3ml/L条件下,海绵铁耦合H_2O_2体系中随着活性炭的加入,去除率在逐步升高,并在铁碳质量比为0.5时,去除率趋于稳定,分别为45%、54.4%和68.5%,去除率较未投加活性炭时提高了9.5%、9.5%和8.7%;(3)在进水COD均值为921.1mg/L条件下,在H_2O_2投加量分别为1ml/L、2ml/L及3ml/L时,海绵铁耦合H_2O_2技术预处理可以分别将其COD降至590.9mg/L、505.1mg/L和395.3mg/L,进入SBBR进行生化处理,其最终COD出水均值分别为234.6mg/L、179.7mg/L和148.7mg/L。4、催化金属在海绵铁物化作用腈纶废水体系中的强化作用效果考察(1)在海绵铁投加量35g/L、铁碳质量比0.5、反应时间75min条件下,Mn O_2和Al_2O_3投加量均在1g/L时,在不同的进水p H条件下,均对海绵铁/碳微电解体系预处理腈纶废水起到了强化作用,在进水p H为2时,去除率由29.68%分别升至36.69%和39.58%。(2)在海绵铁投加量10g/L、H_2O_2投加量1.5ml/L、H_2O_2在初始时刻一次性全部投入、反应时间105min条件下,Al_2O_3投加量在2g/L时,在进水p H为2条件下,去除率可由29.54%升至42.97%,并能拓宽对进水p H的适应范围;而同样在该条件下,Si O投加量为2g/L时,在进水p H为2时,去除率可由29.48%升至42.09%。(3)在海绵铁投加量15g/L、反应时间90min条件下,Mn O_2和Al_2O_3投加量均在2g/L时,在不同的进水p H条件下,均对海绵铁预处理腈纶废水起到了强化作用,在进水p H为2时,去除率由21%和21.6%分别升至25%和31.44%,Al_2O_3对单独海绵铁体系起到强化作用的同时,也能拓宽海绵铁预处理腈纶废水对进水p H的适应范围,在原水p H条件下,去除率可由3.6%升至17.17%。
[Abstract]:This project comes from the national "12th Five-Year" water special related subject to strengthen the removal of organic pollutants in the acrylic fiber wastewater, and combined with the actual treatment of Jilin chemical fiber group Qifeng Limited by Share Ltd acrylic fiber wastewater treatment. The present situation of biodegradation of COD in waste water is combined with sponge iron / carbon micro electrolysis, sponge iron / carbon micro electrolysis coupling H_2O_2, sponge iron Fenton and catalytic metal to strengthen the above technology. The effects of the above physicochemical technology on the removal of acrylic fiber wastewater and the effect on the effect of biochemical treatment are investigated. The experiment takes COD as an inspection index to get the following. Conclusions: 1, on the basis of single factor experiment, sponge iron / carbon micro electrolysis technology (1) is used to optimize the process conditions of the pretreatment of acrylic fiber wastewater by the response surface analysis. The optimum factors are as follows: the influent P H is 2, the mass ratio of iron and carbon is 0.5, the dosage of the sponge iron is 35g/L, and the reaction time is 75m In. under this condition, the removal rate of COD can reach 29.59%. (2) the pretreatment of acrylic fiber wastewater by sponge iron / carbon micro electrolysis can improve the biological removal efficiency. Under the condition of COD mean of 925.5mg/L, micro electrolysis can reduce it to 648.2mg/L, the removal rate is 29.96%, the final biochemical effluent COD is 231.8mg/L, the biochemical removal rate is 64.24%, the cumulative removal rate is 74.95%, and the ratio is 74.95%. The removal rate increased by 12.5% and the cumulative removal rate increased by 23.2%; (3) micro electrolysis could reduce the effluent from the wastewater treatment plant of the wastewater treatment plant with COD mean 314.2mg/L to 198mg/L, and then the wastewater entered the biochemical system, which had no removal effect and reached the biochemical removal limit. (4) the mass ratio of iron and carbon was adjusted from 0.5 to 1 (sponge iron) on the basis of the response surface optimization conditions. Adding amount of 35g/L, influent P H 2 and reaction time 75min), the removal rate of micro electrolysis decreased from 29.96% to 23.56% before the adjustment, the biochemical removal rate of SBBR decreased from 64.23% to 59.32%, and the total removal rate decreased from 74.95% to 68.91%. (6) the influent P H was adjusted from 2 to 3,5 and P H of raw water (35g/L, iron dosage of iron sponge). The carbon mass ratio is 0.5 and the reaction time is 75min). When the influent COD mean value is 752mg/L and the influent P H is 3, the sponge iron / carbon micro electrolysis can reduce COD to 574.9mg/L, and then the final effluent COD mean value is 258.6mg/L and the influent P H is 5. When the influent P H is the original P H, the sponge iron / carbon micro electrolysis can reduce COD to 618.6mg/L, and then the final effluent COD mean value is 288.7mg/L by biochemical treatment; the control group is the acrylic wastewater without the sponge iron / carbon pretreatment, its final biochemical effluent is 358.8mg/L.2, the sponge iron / carbon micro electrolysis coupling H_2O_2 technology pretreatment acrylic wastewater (1) is in the control group. In response surface optimization of sponge iron / carbon micro electrolysis conditions (spongy iron dosage 35g/L, iron carbon mass ratio 0.5, influent P H 2, reaction time 75min), H_2O_2 coupling mode is from initial time, continuous flow mode is added, the maximum dosage of 3ml/L.H_2O_2 adding is 1ml /L, 2ml/L and 3ml/L, when the influent COD is 825.9mg/L, its effluent The removal rates of 414.4mg/L, 345.3mg/L and 261.6mg/L were 49.8%, 58.2% and 68.3%, respectively. (2) when the influent COD mean was 730.4mg/L, the H_2O_2 dosage was 1ml/L, 2ml/L and 3ml/L respectively. The pretreatment could reduce the COD to 385.3mg/L, 306.4mg/L and the biochemical treatment. For 159.2mg/L, 126.4mg/L and 88.8mg/L.3, the spongy iron coupling H_2O_2 technology pretreated the acrylic fiber wastewater (1) in the influent P H, with the mixing speed of 50r/min, H_2O_2 dosage 1ml/L, 2ml/L and 3ml/L. Under the conditions of continuous flow, the removal rate is 36.1%, 45.5%, 58.1%. (2) under the condition of 1ml/L, 2ml/L and 3ml/L, the removal rate of the cavernous iron coupling H_2O_2 system increases gradually with the addition of activated carbon, and the removal rate tends to be stable when the mass ratio of iron and carbon is 0.5, which is 45%, 54.4% and 68.5%, respectively, and the removal rate is higher, respectively. When the activated carbon was not added, 9.5%, 9.5% and 8.7% were increased. (3) when the COD mean of the influent was 921.1mg/L, and when the dosage of H_2O_2 was 1ml/L, 2ml/L and 3ml/L respectively, the sponge iron coupled H_2O_2 technology could reduce its COD to 590.9mg/L, 505.1mg/L and 395.3mg/L, and entered SBBR for biochemical treatment, and the mean value of the final effluent was 23, respectively. The effect of 4.6mg/L, 179.7mg/L and 148.7mg/L.4 on the strengthening of metal in the process of spongy iron in the acrylic fiber wastewater system (1) when the dosage of the sponge iron is 35g/L, the mass ratio of iron and carbon is 0.5, the dosage of Mn O_2 and Al_2O_3 is at 1g/L under the reaction time 75min, the sponge iron / carbon micro electrolysis system is pretreated under the different influent P H. The treatment of acrylic fiber wastewater has been strengthened. When the influent P H is 2, the removal rate is increased from 29.68% to 36.69% and 39.58%. (2) in the sponge iron dosage 10g/L, H_2O_2 dosage 1.5ml/L, H_2O_2 in the initial time all input, the reaction time 105min conditions, Al_2O_3 dosage in 2g/L, under the P H is 2 conditions, the removal rate can be 2. 9.54% to 42.97%, and can broaden the range of adaptation to the influent P H, and under the same condition, when the dosage of Si O is 2g/L, when the influent P H is 2, the removal rate can be increased from 29.48% to 42.09%. (3) in the sponge iron dosage 15g/L. Under the condition of reaction time 90min, Mn O_2 and dosage are all under the conditions of different influent conditions. The pretreated acrylic fiber wastewater has been strengthened. When the influent P H is 2, the removal rate is increased from 21% and 21.6% to 25% and 31.44% respectively. Al_2O_3 can strengthen the individual sponge iron system and also broaden the adaptation range of the sponge iron pretreated acrylic wastewater to the influent P H. Under the P H condition, the removal rate can be increased from 3.6% to 17.17%..
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X783.4

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