曝气生物滤池工艺在田独污水处理厂的应用

主要介绍三亚市高新技术产业园田独污水处理厂采用曝气生物滤池工艺的设计思考以及主要设计参数,包括污水处理厂进出水水质、工艺流程、预处理及后续处理构筑物设计等,重点介绍了曝气生物滤池池型选择、滤池滤料选择、滤池负荷参数、滤池布水布气及反冲洗系统设计、滤池运行控制流程等。     

空气曝气与纯氧曝气生物滤池应用于污水深度处理的研究

采用两种不同气源的曝气生物滤池对污水处理厂二级出水进行深度处理中试研究.结果表明,空气曝气和纯氧曝气生物滤池对COD_(Mn)的去除率相近,分别为30.5%和30.9%;以纯氧为气源的生物滤池硝化能力远强于空气曝气生物滤池,氨氮总去除率77.4%,出水氨氮为2.1～6.3 mg/L;纯氧曝气提高了滤池上部氨氮去除效果,维持滤池内溶解氧在6 mg/L以上,沿水流方向使pH逐渐下降.纯氧曝气生物滤池是污水深度处理中去除氨氮的有效工艺.     

新型曝气生物滤池在微污染水源供水工程中的应用

在我国南方地区,在微污染水源处理工程中采用给水曝气生物滤池工艺应用较多,以广东某水厂微污染处理工程的成功实践,介绍了一种新型生物滤池的设计参数以及运行情况,运行数据证明,该种生物滤池对氨氮的去除效率高,且运行成本低,工艺具有推广价值。     

污水二级处理出水深度处理的试验研究

本文对曝气生物滤池用于城市污水和工业废水的深度处理进行了试验研究。分析了曝气生物滤池、纤维球过滤作为主体工艺对城市污水二级处理厂出水进行深度处理的工艺可行性 ;研究了曝气生物滤池的运行特性 ;考察了采用曝气生物滤池、纤维过滤、活性炭吸附、微滤以及反渗透工艺对工业废水二级出水进行深度处理后回用于循环冷却水系统补水的可行性和可靠性。试验结果表明 :①曝气生物滤池对二级处理后的城市污水 (试验Ⅰ )和工业废水 (试验Ⅱ )中COD的去除率分别为2 5 1%和 5 5 6 % ,出水COD浓度为 33mg/L和 33 6mg/L ,对BOD均有 70 %以上的去除率 ,并且对SS及浊度、氨氮均有很高的去除率 ;②曝气生物滤池对SS与浊度的去除率随进水滤速升高呈直线下降趋势 ,而对COD的去除率在某一个滤速范围内达到最高 ,此时滤池内有机负荷为 1～ 1 5kg COD/ (m3 ·d) ,有效水力停留时间为 1～ 1 5h ;③曝气生物滤池中的溶解氧浓度随填料层增高呈线性增加的趋势 ,COD的去除率沿填料层高度变化为非线性的 ,在试验Ⅰ中 1 5～2m之间的填料层内对COD的去除率最高 ;④根据COD和SS去除率的变化判断反冲洗的周期 ,采用气水联合的方式对曝气生物滤池进行反冲洗 ,反冲洗后曝气生物滤池需要一定的时间才能恢复对污染物的去除能力 ,试     

新型曝气生物滤池——Biostyr

介绍一种新型曝气生物滤池———Biostyr ,着重论及了该工艺的结构、工作原理、工艺特点以及目前的应用情况     

曝气生物滤池(BAF)用于建筑中水处理试验研究

曝气生物滤池是一种介于生物接触氧化法与生物流化床之间的生物膜污水处理工艺,其紧凑性、能耗及运行维护亦介于两者之间,非常适合用于建筑中水处理。为检验曝气生物滤池处理建筑中水的性能,分别采用人工配水和洗浴废水进行了试验测定和实际验证。验证试验表明,经曝气生物滤池处理后的洗浴废水几乎不需任何后续处理(混凝、沉淀、过滤)便可满足中水回用标准要求。     

常见曝气生物滤池性能分析

简单介绍了曝气生物滤池在国内外的发展和应用情况,分析总结了目前国内曝气生物滤池的运用状况。结合有关研究成果,从工程实践角度出发,比较了BIOFOR和BIOSTYR两种生物滤池构造的差异,分析了二者在使用中的注意事项和设计要点,提出了曝气生物滤池工艺使用的局限性。     

曝气生物滤池不同滤料高度除污性能分析

在水力负荷为5m/h,汽水比为1~2的条件下,在曝气生物滤池(BAF)正常稳定运行时,对曝气生物滤池不同滤料层高度的除污性能进行研究分析。实验结果表明:曝气生物滤池对浊度、COD、NH4+-N及色度的去除均有不错的去除效果。并且浊度、COD、色度的去除主要发生在滤料高度为0~50cm处,而NH4+-N的去除主要发生在滤料高度的50~90cm处。     

厌氧滤池—太阳能曝气生物滤池处理农村生活污水技术研究

针对农村生活污水的特点,在曝气生物滤池前设置厌氧生物滤池。生活污水在厌氧生物滤池中通过厌氧生物反应,污水中的主要有机物得到去除,部分未直接去除的有机物经水解、酸化后将大分子有机物转化为小分子有机物,而其生化性得到显著提高。曝气生物滤池作为保证出水水质的功能区,好氧生物反应由太阳能曝气系统提供氧气。进入曝气生物滤池中的污水有机物浓度较低,氧化、硝化反应彻底,出水水质实现达标排放。     

基于gPROMS软件的曝气生物滤池建模研究

根据曝气生物滤池的水力负荷和有机负荷的特性,在gPROMS软件中进行对曝气生物滤池的除碳、硝化和曝气过程的建模研究,仿真进水水质、流量、曝气量等与出水水质的关系,有助于实现工艺设计验证和曝气的自动控制.     

不同填料曝气生物滤池启动挂膜试验研究

不同填料曝气生物滤池在相同条件下进行挂膜试验。进水流向为上流式,挂膜方式为复合接种挂膜,即先用活性污泥闷曝接种,然后逐步提高进水流速,直到滤料表面形成稳定的生物膜。结果表明:33 d后挂膜成功,在温度为16～24℃,水力停留时间(HRT)为1 h,DO为6 mg/L的情况下,陶粒BAF对CODMn和NH3—N的去除率分别为23%和80%;沸石BAF的去除率分别为27%和84%;组合填料BAF去除效果最好,去除率分别为32%和92%。     

曝气生物滤地在污水回用中去除氨氮的试验研究

采用曝气生物滤地(BAF)工艺处理某污水处理厂模拟二级出水,研究了水力负荷及滤料层高度对NH_3-N去除效果的影响.试验结果表明,当进水NH_3-N≤25 mg/L时,平均NH_3-N去除率达到93.12%,出水NH_3-N可降至3 mg/L以下.当水力负荷为1.44 m~3/(m~2·h),HRT为1.8 h时,氨氮的去除效果最好,去除率达到95.32%,出水NH_3-N在1.5 mg/L以下.BAF对NH_3-N的去除作用主要发生在滤料的中上层.     

曝气生物滤池技术的研究与应用

介绍曝气生物滤池(BAF)的结构与工艺,讨论影响BAF运行的主要因素,总结BAF在工业废水、城市污水和微污染源水处理中的作用和效果,综述联用技术的研究进展。结论表明,BAF的BOD容积负荷可达6 kg/(m3.d),NH3-N容积负荷高达1.0 kg/(m3.d);气水比要求在7∶1左右。最后对BAF的发展与应用前景进行展望。     

Performance of a double-layer BAF using zeolite and ceramic as media under ammonium shock load condition简

An experiment was carried out to investigate the anti-ammonium shock load capacity of a biological aerated filter （BAF） composed of a double-layer bed. This bed was made up of a top layer of ceramic and a bottom layer of zeolite. The experiment shows that the anti-ammonium shock load process can be divided into two processes： adsorption and release. In the adsorption process, the total removal efficiency of ammonia nitrogen by zeolite and ceramic was 94%. In the release process, the ammonia nitrogen concentration increased significantly and then gradually returned to the normal level four hours after the shock load. The results indicated that the double-layer BAF had a high level of adaptability to the short-term ammonium shock load and long-term operation. The main factors influencing the dynamic process of ammonia nitrogen adsorption were the filter bed height, ammonia nitrogen concentration of influent, and flow rate. The bed depth service time （BDST） model was used to predict the relationship between the filter bed height and breakthrough time at different flow rates, and the results are reliable.     

曝气生物滤池降解规律试验研究

采用实际分散型生活污水作为试验原水,对曝气生物滤池的降解规律进行了试验研究。结果表明,与传统的观点不同,曝气生物滤池在处理低浓度有机废水时并不发生严格的有机物与氨氮的分段去除现象,有机废水氨氮与有机质基本在同一区域内去除,滤料在10～40cm段的去除率增长速度最快,在70cm之后去除率的增长开始逐渐变缓。在进口段,由于有机质浓度高,供氧充足,有机质的去除率较高;由于异养菌和氨化菌的作用,氨氮浓度在进口段不但不减少,反有微小升高。     

曝气生物滤池升级改造中深度脱氮的试验研究

某城市污水处理厂以曝气生物滤池(BAF)为主要处理工艺,现面临升级改造。设计处理水量2m3/d的中试装置,分别进行前置反硝化和以甲醇为碳源的后置反硝化试验研究,并优化各处理单元的运行参数。其中前置反硝化工艺回流比为125%,单池水力停留时间为20min,CN池和N池的气水比分别为4∶1和3∶1,后置反硝化工艺的水力停留时间为45min,CN池和N池的气水比分别为6∶1和5∶1,甲醇投加量为30mg/L。通过核算建设成本与运行费用,推荐了以前置反硝化为核心的升级改造方案。     

Biological phosphorus and nitrogen removal with biological aerated filter using denitrifying phosphorus accumulating organism.

In order to accomplish the biological nutrient removal with a weak sewage at low temperature, a hybrid process consisted of anoxic denitrifying phosphorus accumulating organism (dPAO) and nitrifying biological aerated filter (BAF) was studied in both lab and field pilot plants with weak sewage. The biofilm BAF was used as a post-nitrification process that provided sufficient nitrate to suspended growth dPAO. The anoxic/BAF configuration could remove nitrogen and phosphorus appreciably compared to other BNR systems. The enhanced biological phosphorus removal (EBPR) was mainly occurred in anoxic zone of suspended growth reactor. It has been found that P removal efficiency of dPAO was enhanced with an addition of a short oxic zone in suspended reactors compared to that of without oxic zone. However, the degree of aerobic P uptake in oxic zone was far lower than anoxic P uptake. The operating results of field plant indicated that dPAO/BAF configuration successfully reduced the adverse temperature effects at lower than 15 degrees C.     

Comparing cost and process performance of activated sludge (AS) and biological aerated filters (BAF) over ten years of full sale operation.

In the early 1990s, the Wastewater Treatment Plant (WWTP) of Frederikshavn, Denmark, was extended to meet new requirements for nutrient removal (8 mg/L TN, 1.5 mg TP/L) as well as to increase its average daily flow to 16,500 m(3)/d (4.5 MGD). As the most economical upgrade of the existing activated sludge (AS) plant, a parallel biological aerated filter (BAF) was selected, and started up in 1995. Running two full scale processes in parallel for over ten years on the same wastewater and treatment objectives enabled a direct comparison in relation to operating performance, costs and experience. Common pretreatment consists of screening, an aerated grit and grease removal and three primary settlers with chemical addition. The effluent is then pumped to the two parallel biological treatment stages, AS with recirculation and an upflow BAF with floating media. The wastewater is a mixture of industrial and domestic wastewater, with a dominant discharge of fish processing effluent which can amount to 50% of the flow. The maximum hydraulic load on the pretreatment section as a whole is 1,530 m(3)/h. Approximately 60% of the sewer system is combined with a total of 32 overflow structures. To avoid the direct discharge of combined sewer overflows into the receiving waters, the total hydraulic wet weather capacity of the plant is increased to 4,330 m(3)/h, or 6 times average flow. During rain, some of the raw sewage can be directed through a stormwater bypass to the BAF, which can be modified in its operation to accommodate various treatment needs: either using simultaneous nitrification/denitrification in all filters with recirculation introducing bottom aeration with full nitrification in some filters for storm treatment and/or post-denitrification in one filter. After treatment, the wastewater is discharged to the Baltic Sea through a 500 m outfall. The BAF backwash sludge, approximately 1,900 m(3) per 24 h in dry weather, is redirected to the AS plant. Primary settler sludge and the combined biosolids from the AS plant are anaerobically digested, with methane gas being used for generation of heat and power. On-line measurements for the parameters NO3, NO2, NH4, temperature as well as dissolved oxygen (DO) are used for control of aeration and external carbon source (methanol). Dosing of flocculants for P-removal is carried out based on laboratory analysis and jar tests. This paper discusses the experience gained from the plant operation during the last ten years, compiling comparative performance and cost data of the two processes, as well as their optimisation.