双循环两相生物工艺脱氮除磷优化运行研究

以城市污水为水源,在新型双循环两相生物工艺( BICT)脱氮除磷中试装置上进行了运行控制条件的优化研究,采用正交法探讨了运行模式、硝化液回流比以及泥龄对系统除污性能的影响.结果表明,系统去除COD的能力较强而且稳定,硝化液回流比和运行模式对系统脱氮影响显著,较短的泥龄可提高系统除磷能力.在适宜运行模式下,泥龄5d、硝化液体积回流比150％,新工艺可实现优化运行,COD、TN和TP的平均去除率可达87.55％、81.5％和93.3％,出水COD和TN、TP的质量浓度可分别控制在50、15和0.5 mg· L-1以下,主要项目可达 GB 18918-2002的一级A标准.     

双循环两相生物处理工艺的脱氮性能研究

对双循环两相(BICT)生物处理工艺在不同工况和试验条件下的脱氮性能进行了试验研究.实验结果表明:BICT工艺通过设置独立的生物膜法硝化区,强化了系统的硝化效率,削弱了泥龄对系统脱氮能力的影响,提高了系统脱氮的稳定性.主反应器上清液回流比和进水碳氮比是影响系统脱氮效果的主要因素.在试验控制的最佳条件下,系统的脱氮效率＞90%,出水TN＜15mg/L.     

废水生物脱氮除磷工艺的进展与评述

针对传统生物脱氮除磷工艺存在的一些不足,即微生物的混合培养,泥龄,碳源和回流污泥中的硝酸盐问题,概要介绍了双循环两相生物处理(BICT)工艺,厌氧/缺氧和硝化(A2N)工艺,BCFS工艺,分段进水BNR工艺,厌氧-往复好氧组合式工艺等几种近年来针对这些问题提出的改进工艺,并从处理工艺的原理、流程和应用于实际工程尚需进一步研究的问题等方面对这些工艺进行了比较和评述。     

反硝化除磷技术的理论、工艺及影响因素的研究进展

废水的反硝化除磷技术作为生物除磷的一个新思路,因其能够解决传统脱氮除磷工艺运行中碳源不足、菌群竞争、泥龄难以控制等诸多问题,已成为废水生物处理研究的一个重要方向。概括反硝化处理的基本理论与优点,阐述A2／O、A2N工艺中实现反硝化除磷的控制方法及研究应甩情况,重点讨论C／N比、缺氧泡NO2负荷及污泥回流比对反硝化除磷效果的影响。     

BICT工艺运行模式对除污性能的影响

新型双循环两相(BICT)生物脱氮除磷工艺是以序批式活性污泥法为基础的废水处理技术。应用该工艺以城市污水为水源进行的中试试验研究结果表明,运行模式对系统反硝化和吸磷效果影响显著。在适宜的负荷和运行模式下,新工艺可实现对进水碳源的充分利用,TN和TP的平均去除率可达81.6%和90%,出水TN和TP可分别控制在15 mg/L和0.5 mg/L以下。     

倒置A2/O与改良A2/O工艺生产性试验比较

以典型高浓度城市污水为处理对象,在生产性试验规模上,比较了不同回流比条件下倒置A2/O工艺与改良A2/O工艺在脱氮除磷效果上的不同,并研究了通过缩短初沉池水力停留时间缓解脱氮除磷碳源矛盾的可行性.试验结果表明,以较低污泥回流比运行的倒置A2/O工艺可以保持较好脱氮除磷效果,与相同污泥回流比而硝化液回流比为300%平行运行的改良A2/O工艺脱氮效果基本相当,但除磷效果优于改良A2/O工艺;提高倒置A2/O工艺污泥回流比至200%左右时,其脱氮除磷效果均优于改良A2/O工艺;通过缩短初沉池水力停留时间可以有效缓解生物脱氮除磷碳源的矛盾,提高系统整体脱氮除磷效果.     

污水处理厂中反硝化除磷工艺的应用

综述了反硝化除磷技术的原理和实现反硝化脱氮除磷的主要工艺。该工艺是根据反硝化聚磷菌(DPB)的摄磷特点而开发的新型生物脱氮除磷工艺,以其特有的"一碳两用"和"双泥系统",有效解决了常规生物脱氮除磷工艺的碳源供求矛盾和泥龄控制问题,可同时获得较高的除磷和脱氮效率。目前常见的主要工艺有A2N-SBR工艺、BCFS工艺和DEPHANOX工艺。     

改良ORBAL氧化沟工艺除磷脱氮功效探讨

主要介绍了改良ORBAL氧化沟的工艺情况,探讨了其除磷脱氮功效。通过对溶解氧、泥龄、进水及回流方式的合理控制,可成功缓解除磷与脱氮之间的矛盾。试验表明：当系统泥龄控制在10-19d时．污水进水和污泥回流25％到缺氧沟,75％到厌氧沟,可获得良好的除磷脱氮效果(出水总磷质量浓度≤0．5mg／L,总氮≤15mg／L)。     

双循环两相生物处理工艺（BICT）除磷中试试验

一种新型的生物脱氮除磷工艺一双循环两相生物脱氮除磷工艺，它是在序批式活性污泥法基础上增设独立的生物膜反应器，实现微生物的分相培养，对提高脱氮除磷效率、增强系统运行的稳定性和可靠性提供了很大的潜力。通过对城市污水的试验，结果表明，在适宜的负荷和运行条件下TP去除率可达90％，出水TP浓度可控制在1．0mg／L以下。     

A2/O-曝气生物滤池工艺反硝化除磷

以低C/N生活污水为研究对象,考察了A²/O-曝气生物滤池生化系统的脱氮除磷特性。通过缩短A²/O的泥龄,把硝化过程从A²/O中分离出去,让曝气生物滤池实现硝化;A²/O在短泥龄条件下运行,有利于除磷及反硝化,曝气生物滤池在长泥龄条件下运行,有利于硝化效果的稳定和氨氮的彻底去除;曝气生物滤池回流来的硝化液为A²/O的缺氧区提供了充足的电子受体,为反硝化除磷提供了必要条件。试验结果表明,在HRT为7.5 h,泥龄为15 d,硝化液回流比为400%的条件下,平均进水COD、NH⁺₄ -N、相似文献   

温度对AOA-SBR工艺同步脱氮除磷的影响

为了提高脱氮除磷的效率,采用序批式生物反应器（SBR）工艺处理模拟生活污水,考察了不同温度下N/P、污泥龄（SRT）对厌氧/好氧/缺氧序批式生物反应器（AOA-SBR）工艺同步脱氮除磷效能的影响。结果表明：当温度为10 ℃、N/P为2～3、SRT为20 d时,NH4+-N、TN和TP去除率分别为78%、69%和56%,污泥产率YS为0.339 kgSS/(kgBOD5),污泥含磷率PC为4.68%。当温度为25 ℃、N/P为3～5、SRT为15 d时,NH4+-N、TN和TP的去除率分别为88%、83%和91%,污泥产率YS为0.253 kgSS/(kgBOD5),污泥含磷率PC为6.35%。当温度为35 ℃、N/P为5～7、SRT为10 d时,NH4+-N、TN和TP去除率分别为80%、66%和73%,污泥产率YS为0.225 kgSS/(kgBOD5),污泥含磷率PC为7.42%。污泥产率YS随着温度和污泥龄的增加而降低,通过调节温度和污泥龄能够实现污泥减量。     

强化生物除磷体系中颗粒污泥的形成及机理探讨

以实验室小试SBR反应器为载体接种普通活性污泥,研究了强化生物除磷系统对颗粒污泥形成的促进作用并探讨了其形成机理。试验结果发现：在生物脱氮运行阶段,SBR中的活性污泥能维持较稳定的絮体状态,平均SVI为138.9 ml·g^-1;当系统转为生物除磷方式运行时,随着除磷效果的好转,反应器中的污泥逐渐转化为颗粒污泥,平均SVI降低至74.1 ml·g^-1,颗粒污泥的平均粒径为0.8 mm。因此,SBR生物除磷系统有利于颗粒污泥的形成。试验发现在强化生物除磷系统厌氧释磷的过程中会有带正电的微粒大量生成,它们可以作为颗粒污泥的晶核吸附带负电的细胞体,进而促进颗粒污泥的形成。强化生物除磷颗粒污泥系统有着较为稳定的磷去除性能,除磷效率接近100%。     

SBR反应器结构对好氧颗粒污泥形态的影响及其动力学分析

采用屠宰废水酸化池出水,在高径比分别为11.1和1.2的SBR反应器(编号分别为R1和R2)中培养好氧颗粒污泥(AGS),考察了AGS的形成过程及其对COD的去除效果.结果表明,R1反应器运行29d形成了圆形AGS,R2反应器运行44d形成了圆柱状AGS,并且形成过程具有反复性.当圆形AGS粒径为2mm,纵横比接近1,...     

温度对序批式生物反应器工艺同步硝化反硝化的影响

为了考察不同温度下碳氮质量比w(C/N)和污泥龄(SRT)对同步硝化反硝化(SND)的影响,研究采用序批式生物反应器(SBR)对模拟废水进行了长期连续实验.结果表明:在pH值为7.5-8的条件下,温度为(5±1)℃,当w(C/N)为8、污泥龄为20 d时,总氮反应速率为1.25 ms/(L·h),COD去除率达到60%...     

厌氧／缺氧SBR反硝化除磷过程的研究

Removal of denitrifying phosphorus was verified in a laboratory anaerobic/anoxic sequencing batch reactor (A/A SBR). The results obtained demonstrated that the anaerobic/anoxic strategy can enrich the growth of denitrifying phosphorus removing bacteria (DPB) and take up phosphate under anoxic condition by using nitrate as the electron acceptor. The phosphorus removal efficiency was higher than 90% and the effluent phosphate concentration was lower than 1mg·L^-1 after the A/A SBR was operated in a steady-state. When the chemical oxygen demand(COD) of influent was lower than 180mg·L^-1, the more COD in the influent was, the higher efficiency of phosphorus removal could be attained under anoxic condition. However, simultaneous presence of carbon and nitrate would be detrimental to denitrifying phosphorus removal. Result of influence of sludge retention time (SRT) on denitrifying phosphorus removal suggested that the decrease of SRT caused a washout of DPB and consequently the enhanced biological phosphorus removal decreased with 8 days SRT. When the SRT was restored to 16 days, however, the efficiency of phosphorus removal was higher than 90%.     

Design of a novel sequencing batch internal micro-electrolysis reactor for treating mature landfill leachate

A novel sequencing batch internal micro-electrolysis reactor (SIME) was specifically designed to treat mature landfill leachate. The idea of simulating the biological process of a sequencing batch activated sludge reactor (SBR) was employed in the design of the new reactor. The innovative concepts behind this design are the combination of the processes of reductive internal micro-electrolysis (IME) without aeration and oxidative IME with aeration, and the integration of electro-aggregation and electro-coagulation. The automated operating system in this reactor is centralized automation which rewards for safe control, convenient operation and the possibility of commercial application. The SIME reactor exhibited a COD removal efficiency of 86.1% for mature landfill leachate in this study, which is much higher than that of conventional treatments, such as electrolysis, coagulation–sedimentation, and the Fenton process. A pilot-scale experiment showed that the reactor was also particularly efficient in the removal of color, humic acids, and metal ions. The BOD₅/COD ratio of the leachate was significantly improved after the treatment. All of these results show that the SIME reactor is a promising new technology because it is efficient and automated, and has the potential to be applied to the practical treatment of mature landfill leachate.     

连续流与序批式组合运行启动高性能CANON反应器

在完全混合流反应器中接种亚硝化颗粒污泥,通过分阶段使用连续流和序批式运行方式,成功启动了全自养生物脱氮（CANON）工艺,并对反应器性能、污泥形态与活性、微生物菌群结构的变化规律进行了深入分析。结果表明,基于初始连续流运行获得的良好基质比,序批式阶段的高氨氮负荷和高溶解氧条件可有效促进污泥浓度与活性的增长,使得反应器在最终连续流状态下的总氮去除负荷达到了1.75 kg·（m³·d）^-1。运行期间,颗粒污泥的密实度和沉降性能均得到改善。由Miseq高通量测序的结果可知,CANON颗粒污泥具有相对较高的微生物多样性。对应于总氮比去除速率0.24 g·（g VSS·d）^-1,Nitrosomonas（好氧氨氧化菌）与Candidatus Kuenenia（厌氧氨氧化菌）丰度比值约为3：1。少量贫营养型亚硝酸盐氧化菌对CANON工艺没有显著影响。     

剩余活性污泥碱性发酵液用于厌氧交替好氧-缺氧序批式反应器生物除磷脱氮的碳源的研究(英文)

Activated sludge process has been widely used to remove phosphorus and nitrogen from wastewater. However, the nitrogen and phosphorus removal is sometimes unsatisfactory due to the low influent COD. Another problem with the activated sludge process is that large amount of waste activated sludge is produced, which needs further treatment. In this study, the waste activated sludge alkaline fermentation liquid was used as the main carbon source for phosphorus and nitrogen removal under anaerobic followed by alternating aerobic-anoxic conditions, and the results were compared with those using acetic acid as the carbon source. The use of alkaline fermentation liquid not only affected the transformations of phosphorus, nitrogen, intracellular polyhydroxyalkanoates and glycogen, but also led to higher removal efficiencies for phosphorus and nitrogen compared with acetic acid. It was observed that ammonium was completely removed with either alkaline fermentation liquid or acetic acid as the carbon source. However, the former resulted in higher removal efficiencies for phosphorus (95%) and nitrogen (82%), while the latter showed lower ones (87% and 74%, respectively). The presence of a large amount of propionic acid in the alkaline fermentation liquid was one possible reason for its higher phosphorus removal efficiency. Exogenous instead of endogenous denitrification was the main pathway for nitrogen removal with the alkaline fermentation liquid as the carbon source, which was responsible for its higher nitrogen removal efficiency. It seems that the alkaline fermentation liquid can replace acetic acid as the carbon source for phosphorus and nitrogen removal in anaerobic followed by alternating aerobic-anoxic sequencing batch reactor.     

改良倒置A~2/O工艺处理低温生活污水技术

生物脱氮除磷系统中磷的去除通过排放剩余污泥实现,需要短泥龄微生物;而硝化细菌为自养菌,需要较长的生长时间。在低温（≤10℃）条件下,硝化污泥泥龄一般为15～20 d,而聚磷菌泥龄为4～5 d,这种巨大的泥龄差距导致现有A2/O在低温下很难实现同时脱氮除磷。本文利用改良的倒置A2/O工艺,研究了低温条件下的生物脱氮除磷效果。结果显示：该工艺低温条件下COD的去除率在85％以上,氨氮去除率低温条件下可达到85%,磷的去除率低温条件下为80%,出水能够达到国家二级排放标准。