本文選題：ABR-MBR組合工藝 + 反硝化除磷　； 參考：《蘇州科技大學(xué)》2017年碩士論文

【摘要】：本研究將厭氧折流板反應(yīng)器(ABR)和膜生物反應(yīng)器(MBR)進行有機組合,構(gòu)建新型的耦合聯(lián)動型ABR-MBR組合工藝,結(jié)合厭氧折流板反應(yīng)器(ABR)微生物相分離及膜生物反應(yīng)器(MBR)水力停留時間與泥齡分離的特性,通過增設(shè)硝化液回流與污泥回流來實現(xiàn)ABR與MBR的循環(huán)聯(lián)動,強化ABR為反硝化除磷提供足夠的優(yōu)質(zhì)碳源,實現(xiàn)反硝化除磷各功能單元的構(gòu)建,對其反硝化除磷協(xié)同機制展開了研究。本研究的主要研究結(jié)果如下:(1)前端ABR的高效去碳是MBR有效硝化的重要保障。在ABR進水有機負荷為1、1.5和2 kg·(m3·d)-1時,ABR出水COD濃度穩(wěn)定在60 mg·L-1,MBR內(nèi)NH4+-N的平均去除率達95%以上,低的ABR出水COD濃度保證了MBR內(nèi)NH4+-N的高效去除;實現(xiàn)ABR有效去碳與MBR硝化耦合的最佳有機負荷為2.0 kg·(m3·d)-1,此負荷下VFA的峰值點位于HRT為2.4 h,ABR第2隔室能為后續(xù)反硝化除磷厭氧段釋磷提供VFA濃度為54.88 mg·L-1。(2)在ABR段有機負荷為2.0 kg·(m3·d)-1、系統(tǒng)的HRT為9 h、SRT為15 d,污泥回流比為100%,硝化液回流比從100%增大至350%時,系統(tǒng)出水COD和NH4+-N濃度分別在50 mg·L-1和1 mg·L-1以下,組合工藝可實現(xiàn)對COD和NH4+-N的穩(wěn)定有效去除。ABR為厭氧釋磷提供了足夠的優(yōu)質(zhì)碳源,此時的ABR第2隔室平均釋磷量分別為9.41、9.83、7.03和3.18 mg·L-1,平均缺氧吸磷量依次為8.8、13.9、11.79和6.5 mg·L-1。硝化液回流比若過高,厭氧段釋磷量會受到隨污泥循環(huán)攜帶的NOx--N影響;硝化液回流比若過低,缺氧吸磷則因電子受體不足而效果不佳,MBR供應(yīng)適量的電子受體是ABR內(nèi)高效反硝化除磷的重要前提。組合工藝最終平均出水溶解性PO43--P濃度分別為1.49、0.5、0.43和1.74 mg·L-1,MBR內(nèi)的好氧除磷保障了組合工藝對磷的進一步去除。(3)在ABR-MBR組合工藝的總HRT為9 h、SRT為15 d,污泥回流比為100%,硝化液回流比為300%時,在C/N比分別為3.6、4.2、4.8、6.0和7.2時,組合工藝最終出水平均溶解性PO43--P濃度依次為0.22、0.34、0.39、0.42和2.45 mg·L-1,低C/N條件有利于本工藝對磷的去除。在C/N=3.6~6.0時,ABR缺氧吸磷量與工藝對TN去除量有著良好的線性關(guān)系,關(guān)系式如下:PO43--P缺氧吸收量=3.7821 TN去除量+21.579,較低的進水COD濃度限制了工藝對TN的去除,此階段提高進水C/N比有助于系統(tǒng)對氮、磷的去除。過高的進水COD濃度因影響缺氧段吸磷及后續(xù)MBR的有效硝化而導(dǎo)致了反硝化除磷體系的崩潰。(4)本研究構(gòu)建了ABR-MBR一體化反應(yīng)器處理生活污水,基于ABR優(yōu)質(zhì)供碳與MBR硝化液回流比相耦合,實現(xiàn)了穩(wěn)定有效的反硝化除磷效果。在ABR段有機負荷為2.0 kg·(m3·d)-1、系統(tǒng)的HRT為9 h、SRT為15 d,污泥回流比為100%,硝化液回流比為300%時,ABR-MBR組合工藝獲得工藝最佳反硝化除磷效果,TN和溶解性PO43--P平均去除率分別達84%和94%,反硝化除磷量達磷總?cè)コ康?7%,平均出水TN和溶解性PO43--P濃度分別為12.98 mg·L-1和0.43 mg·L-1。
[Abstract]:In this study, the anaerobic baffle reactor (ABR) and the membrane bioreactor (MBR) were organically combined to construct a new coupling combined process of ABR-MBR. Combined with the characteristics of anaerobic baffle reactor (ABR) microbial phase separation and membrane bioreactor (MBR) hydraulic retention time (HRT) and sludge age separation, the cyclic linkage of ABR and MBR was realized by adding nitrifying liquid reflux and sludge reflux. Enhanced ABR provided sufficient carbon source for denitrifying phosphorus removal and realized the construction of various functional units for denitrifying phosphorus removal. The synergistic mechanism of denitrification phosphorus removal was studied. The main results of this study are as follows: (1) the efficient decarbonization of ABR is an important guarantee for effective nitrification of MBR. When the influent organic loading of ABR is 1g / 1.5 and 2 kg / m ~ 3 / d ~ (-1), the average removal rate of NH4 -N is over 95% in 60 mg / L ~ (-1) ABR effluent. The low COD concentration of ABR effluent ensures the efficient removal of NH4 -N in MBR. The optimum organic loading to realize the coupling of ABR effective decarbonization and MBR nitrification is 2.0 kg / m ~ 3 / d ~ (-1). Under this load, the peak point of VFA is located in the second compartment of HRT = 2.4 h, which can provide the VFA concentration of 54.88 mg / L ~ (2) for subsequent denitrifying phosphorus removal in anaerobic stage) organic negative in ABR stage. When the charge is 2.0 kg / m ~ 3 ~ (-1), the HRT of the system is 9 h ~ (-1), the SRT of the system is 15 days, the ratio of sludge reflux is 100 and the ratio of nitrification liquid reflux is increased from 100% to 350 ~ (50) d ~ (-1). The effluent concentrations of COD and NH4 were below 50 mg L-1 and 1 mg L-1, respectively. The stable and effective removal of COD and NH4 -N by the combined process could provide sufficient high quality carbon source for anaerobic phosphorus release. The average release of phosphorus in the second compartment of ABR was 9.41 ~ 9.83 mg / L and 3.18 mg / L, respectively, and the average amount of phosphorus uptake by hypoxia was 8.8mg / L and 6.5mg / L, respectively. If the reflux ratio of nitrification liquid is too high, the amount of phosphorus release in anaerobic stage will be affected by the NOx--N carried with sludge cycle, and if the ratio of reflux of nitrification liquid is too low, Anoxic phosphorus uptake is a prerequisite for high efficiency denitrifying phosphorus removal in ABR due to the lack of electron receptors. The final average dissolved PO43--P concentration of the combined process was 1.49mg / L 0.43 and 1.74 mg / L respectively, which ensured the further removal of phosphorus by the combined process. When the total HRT of the combined process was 9 hs, the sludge reflux ratio was 15 days, and the nitrifying liquid reflux ratio was 300, the total HRT of the combined process was 9 h, the sludge reflux ratio was 100 d, and the nitrifying liquid reflux ratio was 300 d, respectively. When the ratio of C / N was 3.6? 2?, the average dissolved PO43--P concentration in the final effluent of the combined process was 0.220.34? There is a good linear relationship between anoxic phosphorus uptake and TN removal in C/N=3.6~6.0. The relationship is as follows: 1: PO43 P anoxic absorption 21.579. The lower influent COD concentration limits the removal of TN by the process. At this stage, increasing the C / N ratio is helpful to the removal of nitrogen and phosphorus. The excessive concentration of COD in influent caused the collapse of denitrifying phosphorus removal system because of the influence of anoxic stage phosphorus absorption and the effective nitrification of subsequent MBR. (4) in this study, an integrated ABR-MBR reactor was constructed to treat domestic sewage. The stable and effective denitrifying phosphorus removal effect was realized based on the coupling of ABR high quality carbon supply and reflux ratio of MBR nitrifying liquid. At the organic loading of 2.0 kg / m ~ 3 ~ (-1) in ABR stage, the HRT of the system is 9 h ~ (-1), the SRT of the system is 15 days, the ratio of sludge reflux is 100, and the ratio of nitrification-liquid reflux is 300, the optimum denitrification phosphorus removal efficiency (TN) and the average removal rate of dissolved PO43--P are 84%, respectively. The denitrification phosphorus removal amount reached 87% of the total phosphorus removal amount. The average TN and dissolved PO43--P concentrations in the effluent were 12.98 mg L-1 and 0.43 mg L-1, respectively.
【學(xué)位授予單位】：蘇州科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X703

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