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給排水畢業(yè)設計外文翻譯及原文(更新版)

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【正文】 sed phosphorous can be recovered in usable products using calcium salts precipitation method. Keeping this fact in mind, in the present study, a new advanced wastewater treatment process is developed by integrating three processes, which are: (a) thermo chemical pretreatment in MBR for excess sludge reduction (b) A2O process for biological nutrient removal (c) P recovery through calcium salt precipitation. The experimental data obtained were then used to evaluate the performance of this integrated system. 2. Methods . Wastewater The synthetic domestic wastewater was used as the experimental influent. It was basically posed of a mixed carbon source, macro nutrients (N and P), an alkalinity control (NaHCO3) and a microelement solution. The position contained (L39。t cause membrane fouling. 4. Conclusions Stable operation of MBR process was possible without significant accumulation of biomass when a part of the biological solids were disintegrated with alkali at pH 11 and temperature 75℃ Thermo chemical sludge digestion favors the recovery of phosphorous in the supernatant using calcium salts. The system can run for a long period of time with any further detoriation in TP removal efficiency. Further studies focusing on fate of disintegrated sludge are in progress. Acknowledgements This work was partly supported by the GS group of panies and Brain Korea 21 program from the Korean Ministry of Education References 1. Akin, ., Ugurlu, A., 2021. The effect of an anoxic zone on biological phosphorus removal by a sequential batch reactor. Bioresour. Technol. 94, 17 2. APHA, 2021. Standard Methods for the Examination of Water and Wastewater, 21 st ed. American Public Health Association, American Water Works Association,Water Pollution and Control Federation, Washington, DC 3. Banu, ., Uan, I., Yeom, LT., 2021. Effect of ferrous sulphate on nitrification during simultaneous phosphorous removal from domestic wastewater using laboratory scale anoxic/oxic reactor. World J. Microbiol. Biotechnol. 24, 29812986 4. Choi, H., Jeong, Sw, Chung, Y 一 2021. Enhanced anaerobic gas production of waste activated sludge pretreated by pulse power technique. Bioresour Technol. 97, 198203 5. Choi, C., Lee, J., Lee, I., Iim, M., 2021. The effects on operation conditions of sludge retention time and carbon/nitrogen ratio in an intermittently aerated membrane bio reactor (IAMBR). Bioresour. Technol. 99, 53975401. 6. Guo, L., Li, ., Bo, X., Yang, Q., Zeng, ., Liao, ., Liu, J 一 2021. Impacts of sterilization, microwave and ultrasonification pretreatment on hydrogen producing using waste sludge. Bioresour. Technol. 99, 36513658 7. Iim, J., Park, C., Iim, ., Lee, M., Iim, S., Iim, ., Lee, J., 2021. Effects of various pretreatments for enhanced anaerobic digestion with waste activated sludge. J Biosci. Bioeng. 95 (3), 271275 8. Li, H., Jin, Y., Mahar, R., Wang, Z., Nie, Y., 2021. Effects and model of alkaline waste activated sludge treatment. Bioresour. Technol. 99, 51405144 9. Lopez, ., Hooijmansa, ., Brdjanovicb, D., Gijzena, ., Mark, ., van Loosdrecht, 2021. Factors affecting the microbial populations at fullscale enhanced biological phosphorus removal (EBPR) wastewater treatment plants in The Netherlands.、八 eater Res. 42, 23492360 10. Mervat, E., Logan, ., 199G. Removal of phosphorus from secondary effluent by a matrix filter. Desalination 10G, 247253 11. Tchobanoglous, G., Burton, F 土, David Stensel, H., 2021. Wastewater Engineering Treatment and Reuse, fourth ed. Mc Graw Hill publication, New York, USA Morita, M., Uemoto, H., Watanable, A., 2021. Nitrogen removal bioreactor capable of simultaneous nitrification and denitrification applicable to industrial wastewater treatment. J. Biotechnol. 131 (2), 24G252 12. Nishimura, F., 2021. Alternation and reduction characteristics of activated sludge by ozonation. Adv. Asian Environ. Eng. 1 (1), 1823 13. Peng, Y., Want, X., Wu,w, Li, J., Fan, J., 2021. O。 2H2O). The synthetic wastewater was prepared three times a week with concentrations of 210 177。熱化學消解法中可以用鈣鹽來回收浮在表面的磷元素。當反硝化作用后,溶液中的氮元素含量在 mg/L 左右。被溶解的磷大概占到 4550%。進水的磷元素濃度在 mg/L 左右,經(jīng)過四周的處理,出水中磷元素的含量已經(jīng)降到 mg/L。 Yoon et al., 2021)。污泥消化一般可分為兩個階段,階段一(第 70139 天 ),階段二 (第 140210 天 )。 3 結(jié)果與討論 圖一數(shù)據(jù)記錄了運行過程中反應器 內(nèi) MLSS 的濃度, MBR 反應器的一個優(yōu)點是它可以在高濃度的 MLSS 下正常運行, 反應器所用的 EBPR 污泥來自韓國的 Kiheung 污水處理廠。 在通常 的管道中安裝壓力測量儀表來測定管內(nèi)壓力。 A2OMBR 處理器 A2OMBR 處理器,好氧部分的工作容積是 ,用一個擋板將它分為三部分,其中厭氧部分 ,缺氧部分 25L,好氧部分 50L,混合的污水通過泵吸的方式以一定的流速流入處理器中。 2H2O, mg CuCl2所以,在這些可溶解磷進入河流之前一定要去除掉。據(jù)報道,污泥分解技術(shù)可以提高污泥的可生化性能 (Vlyssides and Karlis, 2021)。研究結(jié)果表明 ,所提出的流程配置 在不降低處理水 水質(zhì) 的情況下, 有可能減少剩余污泥 的產(chǎn)生 。生物資源技術(shù) 100(2021)38203824 內(nèi)容列表提供在 ScienceDirect 生物資源技術(shù) 期刊主頁 : 在一個 A2OMBR 反應器 中 實現(xiàn)污泥 的 脫氮除磷技術(shù) J. Rajesh Banu, Do Khac Uan, IckTae Yeom * 土木及環(huán)境工程部門 ,SungKyunKwan 大學 ,300,Chunchundong Jangangu,SuwonSi,44074韓國 , 文章相關(guān)信息 文章來源 2021 年 7 月 20 日收 錄 修正 于 2021 年 12 月 11 日 2021 年 12 月 15 日 通過 2021 年 2 月 25 日 發(fā)布在網(wǎng)上 關(guān)鍵詞 A2O 反應 器 MBR 脫氮除磷技術(shù) TMP 摘 要 在目前的研究中 ,一種先進的污水處理工藝 研制出了 在 A2OMBR過程 合并減少剩余污泥和回收磷 的技術(shù) 。反應器 在 210天的運行中 ,MBR通過 膜過濾壓差 保持相對穩(wěn)定。在 MBR 反應器 內(nèi)這個問題可以通過引進污泥分解技術(shù)來解決。 在污泥的預處理中,一定量的可溶解磷將被投加 ,它可以增加磷在污 水中的聚合 度 (Nishimura, 2021)。 4H2O, mg ZnCl2 1 mg/L 和 總磷 (TP)為 mg/L。一個真空泵連在管上以提供負壓。 分析樣品中硝態(tài)氮減少量使用鎘分析的方法 (APHA,2021。 在每天回收 %污泥量的情況下 , 熱化學污泥厭氧消化在第 70 天就開始了。 Salcai et al., 1997。 在最新的研究中,通過生石灰吸收的方 式使可溶性的磷元素變成磷酸鹽沉淀,并在處理水流入河流之前被回收, 所以由于污泥減量化處理而使出水中磷元素含量升高的可能性被大大減小。在熱化學分解過程中, 生物體中固定的磷被溶解并被釋放到溶液中。在硝化作用的第二步中, 經(jīng)過硝化作用形成的硝酸鹽在缺氧的 條件下經(jīng)過反硝化作用轉(zhuǎn)化為氨氣釋放出。 在 PH 為 11 和溫度為 75℃的條件下, 當一部分固體微生物用堿進行消解時, MBR工藝仍能夠穩(wěn)定的運行。) 210 mg glucose, 200 mg NH4C1, 220 mg NaHCO3, 22 一 34 mg KH2PO4, microelement solution ( mg MnCl2 4H20, mg ZnCl22H2O, mg CuCl2 2H2O, mg MgSO4 7H2O, mg FeCl36H2O, mg CaCl2 1
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