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1.
浮动型生物载体在建筑中水处理系统中的应用   总被引:4,自引:1,他引:3  
1悬浮填料简介建筑中水处理通常采用生物接触氧化法,氧化池中的生物载体(填料)是生物接触氧化工艺的关键。载体是微生物的生长地,生物处理效果与所选用的填料有直接关系。填料根据安装方式区分,可分为固定式和浮动(悬浮)式两种。蜂窝填料、软性填料、半软性填料、...  相似文献   

2.
杭嘉湖地区生物预处理工艺的应用研究   总被引:1,自引:0,他引:1  
对于杭嘉湖河网地区氨氮与有机物较高的微污染原水,采用生物预处理有其必要性。针对生物预处理技术特点,结合现有弹性填料接触生物氧化池、生物陶粒滤池、悬浮填料生物接触氧化池和轻质滤料生物滤池四种主要池型的分析,选择该地区应用较多的悬浮填料接触氧化池进行应用研究。根据杭嘉湖地区不同净水厂的运行情况,对氨氮、有机物等指标的去除效果进行评价,对实际运行中存在的问题进行了分析。  相似文献   

3.
徐兵  贺尧基 《给水排水》2007,33(3):7-10
对嘉兴地区主要给水厂近年来应用立体弹性填料、LT型悬浮球填料、YS型悬浮填料、卵石填料等的生物预处理工艺从填料及配套设施、工艺运行参数、运行效果、成本等方面进行了比较.认为弹性填料生物预处理更适用于低浊(50 NTU以下)、低氨氮(1.5 mg/L以下)原水,LT型悬浮球填料生物预处理适用于低中浊(100 NTU以下)、低中氨氮(2.5 mg/L以下)原水,YS型悬浮填料生物预处理及"SAF"滤池对低浊、中高氨氮(2.5 mg/L以上)原水有较好的适应性.最后探讨了弹性填料存在的短流、积泥,悬浮填料存在的部分填料流化不均匀,富氧的生物工艺单元内水生动物泛滥等问题.  相似文献   

4.
弹性填料和悬浮球填料是两种对微污染水源进行生物接触氧化预处理的常规填料,在果园桥水厂已运行多年,总结了两种填料的处理效果和运行情况。结果表明两种填料对微污染水源水都有较好的处理效果。正常情况下,弹性填料及悬浮球填料对氨氮、CODMn、锰的去除率可分别达到60%、10%、24%及90%、20%、50%。  相似文献   

5.
探讨2种新型填料的生物接触氧化工艺对受污染水体的净化效果.设计试验考察了2种填料生物接触氧化工艺对轻度污染水的处理,从COD、NH3-N、TP和浊度的去除效果进行比较研究.并介绍了2种填料的综合性能,以期为填料的选择和开发提供依据.试验表明2种填料在净化水质方面效果较好,阿柯曼优于人工净水草.  相似文献   

6.
ABR-接触氧化工艺处理漂染废水   总被引:2,自引:0,他引:2  
强绍杰 《给水排水》2003,29(4):47-48
介绍了采用厌氧折板反应器 (ABR) +接触氧化工艺处理漂染废水的工程实例。废水经混凝沉淀预处理后 ,进入ABR以提高其可生化性 ,出水再经悬浮填料接触氧化池和二沉池处理后达标排放。  相似文献   

7.
填料的选择对于生物接触氧化池的运行非常重要。以齿轮型流化生物载体为填料,对生物接触氧化池预处理微污染水源水进行了系统的中试研究。结果表明,以齿轮型流化生物载体为填料的生物接触氧化池在7天内启动成功,且生物量丰富。载体的流化状态好,氨氮处理效率高,气水比选择1∶2为宜。长期监测表明,生物接触氧化池对氨氮平均去除率为80.26%,对锰的去除率为34.50%,但对有机物去除不稳定。结合分子生物学研究表明,生物接触氧化池在预处理水源水时,载体表面菌属种群丰富,且功能菌属与其去除氨氮、锰和有机物的效能有直接关联,功能菌群数量越高,处理效果越好。  相似文献   

8.
生活污水处理回用技术研究   总被引:8,自引:0,他引:8  
余静  张林生 《给水排水》2001,27(4):31-34
研究了水解酸化 生物接触氧化 稳定塘工艺处理生活污水的主要技术参数及聚酯纺粘长丝布填料在生物接触氧化工艺中的特殊功能 ,认为该工艺在较高负荷下处理生活污水 ,出水可达《生活杂用水水质标准》(GJ2 5 1- 89)。  相似文献   

9.
新型填料生物接触氧化法硝化反应影响因素的研究硕士生:高淑民导师:顾国维(同济大学环境工程学院200092)本文采用新型填料生物接触氧化工艺,系统地考察了溶解氧浓度、水力停留时间、碳氮比、温度、pH值等因素对硝化反应影响情况。得出如下结论:(1)要满足...  相似文献   

10.
生物接触氧化源水预处理工程的水流阻力试验研究   总被引:2,自引:1,他引:1  
生物接触氧化工艺主要由两大系统组成:填料和曝气。本文结合东深供水源水生物接触氧化预处理这个前所未有的特大型水处理工程的有关试验研究,介绍其水力摩阻问题以及其试验研究的方法;根据实测的流速分布和填料挂泥的重量,分析了生物处理汇的水力特性和填料挂泥对工艺处理效果可能产生的影响,为工程的设计提供了依据。  相似文献   

11.
以某大型综合医院污水处理系统为研究对象,分析了其水量变化规律和两种处理工艺的运行效果,研究了其化粪池、曝气生物滤池、生物接触氧化罐等设施存在的主要问题,并提出了相应的技术对策。  相似文献   

12.
TiO2光催化氧化技术处理环境污染物的研究进展   总被引:5,自引:0,他引:5       下载免费PDF全文
齐建  陈亮  周璇 《水资源保护》2006,22(1):15-18
阐述了TiO2光催化氧化法的原理、TiO2催化剂的制备以及粉末型和负载型两种形态的TiO2在光催化氧化有机污染物方面的应用情况,指出粉末型TiO2主要应用于废水处理,负载型TiO2主要应用于废水处理、垃圾填埋场渗滤液处理和环境净化。粉末型TiO2的研究发展方向是通过改性以提高其活性和可应用性,如表面沉积贵金属、表面耦合、表面敏化、过渡金属掺杂等;负载型TiO2的研究方向是通过改性以提高催化活性,选择合适的载体,充分发挥载体的优势,加强固定态光催化氧化技术与其他技术的联用,利用太阳能作用光源等。  相似文献   

13.
人工YDT及PwT填料接触氧化池生物预处理的系统研究表明生物预处理效率与原水BOD5/CODCr的比值有重要关系.BOD5/CODCr>0.2的原水,细菌总数较多,填料上生物膜生长良好,处理效率高,平均去除率为浊度63.8%,藻类89.2%,氨氮82.6%,CODMn26.3%.BOD5/CODCr的比值为0.08左右的原水,相应的去除率低.在规划生物预处理工程以前,应先检测原水的可生物降解性.  相似文献   

14.
Nitrogen can be eliminated effectively from sludge digester effluents by anaerobic ammonium oxidation (anammox), but 55-60% of the ammonium must first be oxidized to nitrite. Although a continuous flow stirred tank reactor (CSTR) with suspended biomass could be used, its hydraulic dilution rate is limited to 0.8-1 d(-1) (30 degrees C). Higher specific nitrite production rates can be achieved by sludge retention, as shown here for a moving-bed biofilm reactor (MBBR) with Kaldnes carriers on laboratory and pilot scales. The maximum nitrite production rate amounted to 2.7 gNO2-Nm(-2)d(-1) (3 gO2m(-3)d(-1), 30.5 degrees C), thus doubling the dilution rate compared to CSTR operation with suspended biomass for a supernatant with 700 gNH4-Nm(-3). Whenever the available alkalinity was fully consumed, an optimal amount of nitrite was produced. However, a significant amount of nitrate was produced after 11 months of operation, making the effluent unsuitable for anaerobic ammonium oxidation. Because the sludge retention time (SRT) is relatively long in biofilm systems, slow growth of nitrite oxidizers occurs. None of the selection criteria applied - a high ammonium loading rate, high free ammonia or low oxygen concentration - led to selective suppression of nitrite oxidation. A CSTR or SBR with suspended biomass is consequently recommended for full-scale operation.  相似文献   

15.
选择厌氧—接触氧化渠—垂直潜流型人工湿地工艺处理农村生活污水,分析比较了各工艺段DO水平,接触氧化渠充氧效果明显.通过对COD、NH3—N和TP浓度及去除率的研究发现,厌氧池去除率较稳定,对各污染物去除率最高可达72%、49.54%和66.36%,接触氧化渠和人工湿地对各污染物也有较高去除率,但并不稳定.系统运行稳定后,出水水质整体可达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)二级标准,部分时段可达一级B标准.  相似文献   

16.
The mechanism of the deep bed filtration for submicron and nano particles suspension was conducted by means of a force analysis on the suspended particles flow path through order-packed granular filter beds. The flow fields through the filter beds were calculated by using the commercial available CFD software--Fluent. Various types of granular packing structures, such as the simple cubic packing, body-centered packing and face-centered packing structures were chosen for analysis. The motion of suspended particle of 2.967, 0.816, 0.460 and 0.050 microm in diameter, respectively, were tracked by considering the following forces including a net gravitational force, hydraulic drag force, lift force, Brownian force, van der Waals force and a double layer force. The effects of the granular bed packing structure, the porosity of these beds and the suspended particle diameter on the capture efficiency of a granular filter bed were examined. The force analysis depicts that the inertial effect and van der Waals force increased the capture probability of particles on the granular filter bed while the lift force and the Brownian force decreased the particle deposition. Simulated results show that among the chosen packing structures, the face-center packed granular bed gives the greatest pressure drop and capture efficiency of particles due to the lower packing porosity. The simple cubic packed filter bed showed the lowest pressure drop and capture efficiency of particles due to the greatest packing porosity among the chosen packing structures. It is mainly due to the simple cubic packing structure in which there exists the free vertical downward flowing path and thus exhibits a higher packing porosity. The comparisons of the simulated capture efficiency with experimental results depicted that the body-centre packed granular bed showed the best approximation of capture efficiency compared to that of the randomly packed granular bed.  相似文献   

17.
The possibility of enhancing the process performance of the UASB-septic tank for treating strong sewage in Palestine by means of inoculating the reactor with well adapted anaerobic sludge and/or adding a packing media to the upper part of the reactor, creating an anaerobic hybrid (AH)-septic tank, was investigated. To achieve these objectives, two community onsite UASB-septic tank and AH-septic tank were operated in parallel at 2 days HRT for around 8 months overlapping the cold and hot periods of the year in Palestine. The achieved removal efficiencies of CODtot in the UASB-septic tank and AH-septic tank during the first months of operation, coinciding with the cold period and the subsequent hot period, were respectively 50 (+/- 15)% and 48 (+/- 15)% and 66 (+/- 8)% and 55 (+/- 8)%. This shows that the UASB-septic tank performed significantly better (p < 0.05) than the AH-septic tank after rather long periods of operation. The difference in the CODtot removal efficiency was mainly due to the better CODss removal efficiencies in the UASB-septic tank. The removal efficiencies over the last 50 days of operation for CODtot, CODsus, CODcol and CODdis were 70, 72, 77 and 55% and 53, 54, 78 and 45% for the UASB-septic tank and AH-septic tank, respectively. Comparing the here achieved COD removal efficiencies with previously reported efficiencies of UASB-septic tanks operated in Palestine shows that the reactor performance in terms of COD removal and conversion, during the first 8 months of operation, has improved substantially by being started with well adapted anaerobic sludge, simulating and predicting long-term performance. Adding packing media did not lead to an improvement.  相似文献   

18.
In an attempt at membrane fouling control, a kind of cylindrical plastic suspended carrier was added in a submerged membrane bioreactor (SMBR) and its effect was investigated in this study. According to the transmembrane pressure (TMP) profiles and the sludge characteristics in comparative runs with and without suspended carriers, it was found that the suspended carriers added in SMBR had two effects on membrane fouling: one was the positive effect of mechanically scouring the membrane surface and the other was the negative effect of breaking up sludge flocs. Sludge particle size distribution change was mainly responsible. It was suggested to apply the suspended carrier at higher MLSS concentration and lower carrier dose based on the consideration for retarding sludge breakage caused by the carrier. The experiment was conducted under higher MLSS (8 gL(-1)) and lower carrier dose (carrier volume/total volume = 10/). The TMP increase was effectively retarded by added suspended carriers compared to the system without addition of the carriers. The effect of suspended carriers on membrane fouling at high MLSS concentration was verified.  相似文献   

19.
水源水生物预处理中填料生物量的测定方法探讨   总被引:4,自引:0,他引:4  
对生物膜生物量进行准确测定,有助于从微生物的角度提高运行效率和对工艺进行技术改进.对某水源水预处理反应器中的填料(泡沫粒子和管状填料)上生物膜中的生物量,同时采用称重法、平板菌落计数法(HPC法)及脂磷法进行了测定.结果表明,三种方法所得生物量的差异较大,对于同种填料上的生物量以重量法反映的生物量最多,但其中VSS的含量难以准确测定,脂磷法次之,HPC法由于培养方法的限制,仅能反映部分可培养的微生物,故其生物量最少.三种方法对两种填料测定结果的变化趋势基本一致,即泡沫粒子的生物量比管状填料的生物量多.  相似文献   

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