本文選題：氣升回流一體化 + 除磷��； 參考：《蘇州科技學(xué)院》2015年碩士論文

【摘要】：城市化進(jìn)程的推進(jìn),大大改善了人們的居住環(huán)境,但同時(shí)也使原本可通過自然凈化作用去除的污染源轉(zhuǎn)變?yōu)樵S許多多的分散式污染源,由于過分分散而無法納入城市的集中處理系統(tǒng)。這催生了分散式污水處理,它是集中式污水處理系統(tǒng)的有效的、必要的補(bǔ)充。氣升回流一體化裝置是一種針對(duì)分散式生活污水處理而設(shè)計(jì)的反應(yīng)器,主要由進(jìn)水區(qū)、缺氧區(qū)、好氧區(qū)、氣升回流區(qū)及沉淀出水區(qū)組成,其結(jié)構(gòu)緊湊,占地面積少,運(yùn)行費(fèi)用低,管理維護(hù)簡(jiǎn)單,對(duì)各種經(jīng)濟(jì)發(fā)展水平下的地區(qū)都具有普遍適用性。該裝置具有良好的有機(jī)物和氨氮去除效能,而對(duì)于其他污染物的去除能力尚未進(jìn)一步研究。在對(duì)系統(tǒng)進(jìn)出水總磷進(jìn)行檢測(cè)的過程中發(fā)現(xiàn),出水總磷含量比進(jìn)水含量低,即存在一定的磷去除能力。目前,除磷方法主要有傳統(tǒng)的微生物除磷、動(dòng)植物吸收、吸附除磷以及化學(xué)沉淀除磷等,還有尚處于試驗(yàn)研究階段的磷酸鹽還原機(jī)制�；跉馍亓饕惑w化中試裝置的除磷現(xiàn)象,結(jié)合對(duì)基本理論的回顧,以氣升回流一體化中試裝置為研究對(duì)象,以生活污水為原水,探討氣升回流一體化中試裝置的除磷效能及其除磷途徑,以期進(jìn)一步完善反應(yīng)器除污性能,便于反應(yīng)器的推廣應(yīng)用。氣升回流一體化中試裝置總有效容積10.31m3,在2014年10月~2015年10月運(yùn)行期間,在不排放污泥的條件下,DO含量為0.5-2.0mg/L,回流比為0.6-1.0,進(jìn)水平均流量為(552±94)L/h,進(jìn)水平均總磷含量為(4.628±0.966)mg/L,表現(xiàn)出對(duì)總磷的長(zhǎng)效去除,在這種條件下得到以下主要結(jié)論:1)系統(tǒng)平均除磷效率為(44.629±8.646)%,平均除磷量為(27.120±8.258)g/d。2)系統(tǒng)的主要除磷途徑主要包括污泥囤積、動(dòng)物攝食和磷酸鹽還原機(jī)制。污泥囤積去除磷量為8.218g/d,占總?cè)コ康?0.30%。其中缺氧區(qū)總磷囤積為5.834g/d,好氧區(qū)和沉淀區(qū)共囤積總磷2.384g/d。系統(tǒng)污泥中各形態(tài)磷對(duì)污泥囤積除磷的貢獻(xiàn)率最大從小到大依次為Res-P、Ca-P、BD-P、H_2O-P Org-P和NaOH-P,貢獻(xiàn)率分別為6%、6%、9%、15%、23%和41%。動(dòng)物攝食作用去除磷量為0.795g/d,占系統(tǒng)總磷去除量的2.93%,此外由于蚊蟲生長(zhǎng)繁殖而去除掉的磷無法估算。系統(tǒng)磷損失18.107g/d,缺氧區(qū)污泥MBP平均含量為0.70±0.58mg/kg,好氧區(qū)污泥中MBP含量高達(dá)4.81mg/kg,推斷磷損失是磷酸鹽還原機(jī)制的結(jié)果,即磷酸鹽在還原作用下轉(zhuǎn)化為磷化氫,以氣態(tài)形式從系統(tǒng)中釋放到大氣中。磷損失的部分還可能包含了蚊蟲成蟲離開系統(tǒng)帶出的磷。3)除磷效率隨進(jìn)水流量的增加有所下降,與缺氧區(qū)水流流量無關(guān);進(jìn)水流量在(320~730)L/h時(shí),除磷量隨進(jìn)水流量和缺氧區(qū)水流流量的增加而增加。且當(dāng)回流硝態(tài)氮量(QrNO_3~--N)等于215g/d左右時(shí),系統(tǒng)除磷量達(dá)到最大。當(dāng)QrNO_3~--N215g/d時(shí),除磷量隨QrNO_3~--N增加而升高,當(dāng)QrNO_3~--N215g/d時(shí),除磷量隨QrNO_3~--N的增加而降低。除磷量還受缺氧區(qū)除碳量(RAC)的影響,并隨RAC的增加而逐漸增加。出水濁度的增加會(huì)導(dǎo)致出水總磷含量升高,系統(tǒng)除磷效率降低。
[Abstract]:The advancement of urbanization has greatly improved the people's living environment, but at the same time, it also makes the source of pollution removed by natural purification into a number of scattered sources of pollution. Due to excessive dispersion, it can not be incorporated into the centralized treatment system of the city. This has caused the dispersed sewage treatment, which is a centralized sewage treatment system. The air lift backflow integrated device is a reactor designed for the treatment of dispersed domestic sewage. It consists mainly of water intake area, anoxic area, aerobic zone, air lift reflux area and precipitated water area. It has compact structure, less occupied area, low operating cost, simple management and maintenance, and to a variety of economic development levels. The area has universal applicability. The device has good organic and ammonia nitrogen removal efficiency, and the removal capacity of other pollutants has not been further studied. In the process of detecting the total phosphorus in the system, the total phosphorus content of the effluent is lower than that of the influent. There are traditional microbial phosphorus removal, plant and plant absorption, phosphorus removal, chemical precipitation and phosphorus removal, as well as phosphate reduction mechanism, which is still in the experimental stage. Based on the phenomenon of phosphorus removal in the pilot plant of air lift reflux integration, combined with the basic theory, the pilot plant of air lift and reflux integration is used as the research object and domestic sewage is taken as the research object. In order to further improve the depollution performance of the reactor and facilitate the application of the reactor, the total effective volume of the pilot plant was 10.31m3. The content of DO was 0.5 under the condition of no sludge discharge in October 2014 ~2015. The total effective volume of the reactor was improved to further improve the performance of the reactor and the application of the reactor. -2.0mg/L, the reflux ratio is 0.6-1.0, the average flow rate of influent is (552 + 94) L/h, the average total phosphorus content of the influent is (4.628 + 0.966) mg/L, showing the long-term removal of total phosphorus. Under this condition, the following main conclusions are obtained: 1) the average phosphorus removal efficiency of the system is (44.629 + 8.646)%, and the average phosphorus removal amount is (27.120 + 8.258) g/d.2) and the main dephosphorization route of the system Mainly including sludge hoarding, animal feeding and phosphate reduction mechanism. The sludge hoarding to remove phosphorus is 8.218g/d, accounting for the total removal of 30.30%., and the total phosphorus in the anoxic area is 5.834g/d, and the contribution rate of each form of phosphorus to the sludge hoarding in the aerobic and precipitation areas of the total phosphorus 2.384g/d. system sludge is Res-P The contribution rates of Ca-P, BD-P, H_2O-P Org-P and NaOH-P were 6%, 6%, 9%, 15%, 23% and 41%. for the removal of phosphorus by 0.795g/d, accounting for 2.93% of the total phosphorus removal of the system. In addition, the phosphorus removal from the growth and reproduction of the mosquitoes could not be estimated. The system phosphorus loss 18.107g/d, the average MBP content of the sludge in the anoxic region was 0.70 + 0.58mg/kg, aerobic zone sludge The content of MBP is up to 4.81mg/kg, and it is concluded that the phosphorus loss is the result of phosphate reduction mechanism, that is, phosphate is converted into hydrogen phosphide under reduction, and is released from the system to the atmosphere in the form of gaseous state. The part of phosphorus loss may also include phosphorus.3 from the adult insect leaving the system with the increase of the influent flow rate. The flow rate of the water flow in the anoxic region is independent. When the influent flow is (320~730) L/h, the amount of phosphorus removal increases with the increase of the influent flow and the flow flow in the anoxic region. And when the amount of reflux nitrate nitrogen (QrNO_3~--N) is about 215g/d, the amount of phosphorus removal reaches the maximum. When QrNO_3~--N215g/d, the amount of phosphorus increases with the increase of QrNO_3~--N, when QrNO_3~--N215g/d, except for QrNO_3~--N215g/d. The amount of phosphorus decreased with the increase of QrNO_3~--N. The phosphorus removal was also affected by the amount of carbon removal (RAC) in the anoxic region and increased with the increase of RAC. The increase of the turbidity of the effluent would lead to the increase of total phosphorus content in the effluent, and the efficiency of the system dephosphorization was reduced.
【學(xué)位授予單位】：蘇州科技學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703

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相關(guān)期刊論文 前10條

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本文編號(hào)：2023097