本文關(guān)鍵詞：高比例印染廢水城市污水廠強(qiáng)化除污染研究　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

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【摘要】：印染廢水作為紡織工業(yè)產(chǎn)生的污水,具有很嚴(yán)重的污染。其除了工業(yè)廢水所具有的特性外,還有很高的色度。除此外,其排放量大,可占到工業(yè)水總排放量的10%,是造成目前水體污染的重要原因之一。南方某污水廠的進(jìn)水中含有較高比例的印染廢水,以其現(xiàn)有工藝的現(xiàn)有運(yùn)行狀態(tài)來說,很難實(shí)現(xiàn)穩(wěn)定達(dá)標(biāo)。本文基于南方某污水廠的實(shí)際情況,針對高比例印染廢水的進(jìn)水水質(zhì),調(diào)查了該水廠現(xiàn)有工藝的運(yùn)行處理效果,發(fā)現(xiàn)并提出了現(xiàn)有工藝運(yùn)行的問題。對于進(jìn)水來講,該水廠的進(jìn)水中具有較高比例的工業(yè)廢水,其中以印染廢水為主,同時(shí)還有造紙廢水等。經(jīng)調(diào)查,在污水廠的進(jìn)水中常含有一些上述工業(yè)生產(chǎn)中產(chǎn)生的較難降解的顯色物質(zhì),例如2,4-二叔丁基苯酚等苯的衍生物質(zhì)。這類物質(zhì)屬于難生物降解物質(zhì)。雖然水解池對其具有一定的分解能力,但是后續(xù)的生物工藝降解作用較差。這也是污水廠各工段長期具有嚴(yán)重色度的原因。而且其進(jìn)水水質(zhì)的波動較為劇烈,常有進(jìn)水水質(zhì)嚴(yán)重超標(biāo)的情況發(fā)生,這些現(xiàn)狀都對生物工藝造成了一定的沖擊。作為提升污水可生化性的手段,水解酸化工藝有著成本低,操作簡單,無難處理副產(chǎn)物等優(yōu)點(diǎn),近期備受關(guān)注。停留時(shí)間是水解酸化工藝的關(guān)鍵參數(shù),該水廠的水解池由于停留時(shí)間過長,導(dǎo)致其并不能展現(xiàn)出提升污水可生化性的作用。經(jīng)過水解池后,B/C不升反降。而作為后續(xù)工藝的多點(diǎn)進(jìn)水以及A2O工藝段由于缺乏微生物可利用的碳源物質(zhì),導(dǎo)致工藝后半段DO不易控制,使得其降解效果受到影響。A2O工藝內(nèi)回流較小,限制了對于TN的去除效果。因此,本文針對這一現(xiàn)狀展開研究,著力于優(yōu)化現(xiàn)有工藝的運(yùn)行現(xiàn)狀。對于水解池來講,對其進(jìn)行了停留時(shí)間的優(yōu)化,并證明了對于高比例印染廢水進(jìn)水水質(zhì)來講,10h的停留時(shí)間運(yùn)行時(shí)效果最為理想。10h停留時(shí)間對于B/C的提升作用最為明顯,可由0.22提升至0.31。停留時(shí)間過長或者過短都會影響其處理效果。對于A2O工藝而言,對于高比例印染廢水進(jìn)水水質(zhì)來講,本研究中采取了調(diào)節(jié)內(nèi)回流的方法來進(jìn)行強(qiáng)化,并提出了300%的內(nèi)回流比較優(yōu)。將A2O工藝的內(nèi)回流由200%調(diào)節(jié)為300%后,A2O工藝對于總氮去除率的提升效果十分顯著,調(diào)節(jié)前后總氮的去除率由36.9%提升至68.6%,實(shí)現(xiàn)了總氮的穩(wěn)定達(dá)標(biāo)。其余指標(biāo)也均得到了加強(qiáng),如COD的去除率由66.8%提升至75.9%,TP的去除率由86.3%提升至90%,均實(shí)現(xiàn)了穩(wěn)定達(dá)標(biāo)。對于多點(diǎn)進(jìn)水工藝來講,針對高比例印染廢水進(jìn)水水質(zhì),本研究中針對進(jìn)水水質(zhì)提出了一套新的運(yùn)行參數(shù)。參數(shù)具體設(shè)置分為三部分,配水比、內(nèi)回流以及溶解氧控制。配水比是指將厭氧以及兩個(gè)缺氧段的配水比例設(shè)置為0.45:0.35:0.2。內(nèi)回流是指將由第三好氧段回流至第二缺氧段的硝化液回流比設(shè)置為300%。溶解氧控制是指將三個(gè)曝氣段的溶解氧分被控制在0.8mg/L、1.5mg/L以及2.5mg/L左右。實(shí)驗(yàn)中證明在該運(yùn)行參數(shù)下,當(dāng)TN的平均進(jìn)水濃度為22.38mg/L時(shí),出水的平均濃度可以降低至10.78mg/L左右,此時(shí)的去除率高達(dá)52%,最高可以達(dá)到54.4%。同時(shí)對于氨氮的去除也得到了強(qiáng)化,去除率達(dá)到了92.7%,使得氨氮濃度從14.79mg/L下降至0.998mg/L,達(dá)到一級A標(biāo)準(zhǔn)。對于COD來講,去除率也大大提升,達(dá)到了82.4%,使得出水平均濃度穩(wěn)定在45.62mg/L附近,穩(wěn)定達(dá)標(biāo)。對TP來講影響不是很大,去除率為91.3%,也實(shí)現(xiàn)了穩(wěn)定達(dá)標(biāo)。綜上所述,針對高比例印染廢水的進(jìn)水水質(zhì),在本研究提出的運(yùn)行方案下,多點(diǎn)進(jìn)水工藝的運(yùn)行效果最佳,可實(shí)現(xiàn)出水中各污染指標(biāo)的穩(wěn)定達(dá)標(biāo)。
[Abstract]:As the textile industry of printing and dyeing wastewater generated by sewage has very serious pollution. In addition to the characteristics of industrial wastewater, and high chroma. In addition, its emissions, emissions of industrial water can be accounted for the total amount of 10%, is the major cause of water pollution of the water. A printing and dyeing wastewater a sewage treatment plant contains a high proportion of the south, to the existing operating state of the existing technology, it is difficult to achieve stable and standard. In this paper, the actual situation of a wastewater treatment plant based on water quality in the south, the high proportion of printing and dyeing wastewater, the operation process of the investigation of the effect of the existing processing plants, found the existing process operation the problem for water, industrial wastewater has a higher proportion of water in the water, the printing and dyeing wastewater, and papermaking wastewater. After investigation, the water in sewage treatment plants often contain some The color material is difficult to degradation of the industrial production, such as derivatives 2,4- Di tert butyl phenol and benzene. This kind of material is difficult to be degraded. Although the hydrolysis tank has ability to decompose some of its biological degradation process, but poor follow-up. This is also the reason that each section has a long-term sewage treatment plant serious color. And the water quality fluctuation is more severe, often occur serious exceed the standard of water quality, the situation has had a huge impact on the biological process. As to enhance the biodegradability of sewage by means of acid hydrolysis process with low cost, simple operation, no hard processing by-products etc. the recent concern. The residence time is the key parameters of the hydrolysis acidification process, the water hydrolysis tank due to long residence time, which does not show the upgrading sewage biodegradability. After After hydrolysis, B/C not declined. As more of the following process in water and the A2O process due to the lack of carbon source material available microbial process leading to the second half, DO is not easy to control, so that the degradation effect is affected by the.A2O process flow small, limited to TN removal. Therefore, this paper launches the research, focusing on optimizing the operation status of the existing process for the hydrolysis of pool, the residence time of the optimization, and it proves that the water quality of high proportion of printing and dyeing wastewater, the residence time of operation is the most ideal effect 10h.10h residence time to enhance the role of the B/C obviously, can be increased from 0.22 to 0.31. for too long or too short will affect the treatment effect. For the A2O process, the water quality of high proportion of printing and dyeing wastewater, this study adopted a regulation in return The method is to strengthen, and put forward the 300% recirculation process. Comparing the A2O in return by 200% adjusted to 300% after the A2O process for the total nitrogen removal rate increased significantly after adjusting the total nitrogen removal rate increased from 36.9% to 68.6%, the total nitrogen of the remaining stable up to the standard. The index has been strengthened, such as the removal rate of COD increased from 66.8% to 75.9%, the removal rate of TP increased from 86.3% to 90%, have achieved stable standards. For the multi-point water process, the high proportion of printing and dyeing wastewater influent water quality, water quality in this study proposed a new set of operating parameters. The specific parameters set is divided into three parts, water distribution ratio, reflux and dissolved oxygen control. Water distribution ratio refers to the ratio of water and two anaerobic anoxic section is set to 0.45:0.35:0.2. in return refers to the third section of oxygen by nitration returned to the anoxic stage second Reflux ratio is set to 300%. the dissolved oxygen control refers to the three section of the dissolved oxygen aeration was controlled at 0.8mg/L, 1.5mg/L and 2.5mg/L. The experiments show that the operating parameters, when the average influent TN concentration was 22.38mg/L, the average concentration of effluent can be reduced to 10.78mg about /L, the removal rate of up to 52%, the maximum can reach 54.4%. and the ammonia nitrogen removal has also been enhanced, the removal rate reached 92.7%, the ammonia concentration decreased from 14.79mg/L to 0.998mg/L, to achieve a A standard. For COD, the removal rate is greatly improved, reached 82.4%, the average effluent concentration stable standard in the vicinity of 45.62mg/L. Not a great impact on the TP, the removal rate is 91.3%, also achieved a stable standard. To sum up, according to the water quality high proportion of printing and dyeing wastewater, the operation scheme proposed in this study, the multi-point water industry The performance of the art is the best, and it can achieve the stable standard of all the pollution indexes in the water.

【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X791

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