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1.
研究了移动床生物膜反应器(MBBR)对废水的处理效果及固体颗粒物的分离作用,包括对COD和氨氮的去除,及其高曝气和硝化作用所产生的固体颗粒物的沉降、粒径分布等。结果表明:MBBR对COD的去除率能达到33%~59%,明显优于对照反应器;MBBR对废水中的氨氮具有很强的硝化作用,氨氮去除率达83.05%,远高于对照反应器。MBBR出水中的总悬浮物(TSS)与原废水相比,增加了约50%,同时,MBBR出水中的挥发性悬浮物(VSS)/TSS高于原废水和对照反应器出水,进一步说明MBBR出水中TSS有相当一部分来自生物膜脱落。另外,曝气能增加较大颗粒物所占的比例,从而提高了悬浮固体的沉降性能。因此,相对于传统的废水处理方法,MBBR具有可靠的除碳除氮效果。  相似文献   

2.
MBBR工艺在微污染原水预处理中的应用   总被引:3,自引:0,他引:3  
移动床生物膜反应器(MBBR)是一种高效、经济的微污染原水预处理工艺。介绍了MBBR的工艺原理及悬浮填料的特点,讨论了MBBR工艺处理微污染原水的影响因素,详细介绍了MBBR工艺处理微污染原水的工程实例,并总结了设计中需要注意的一些问题。  相似文献   

3.
在盐城某自来水厂内开展MBBR中试研究,考察其对水体COD_(Mn)、氨氮的去除效果,为MBBR工艺在饮用水预处理中的应用提供参考依据。结果表明:MBBR工艺对饮用水源水COD_(Mn)和氨氮具有较好的去除效果,去除率分别可达10.2%和45.8%;MBBR工艺具有较强的抗冲击性,水量为设计值的400%时,氨氮仍有49%的去除率;30%是最佳的填料投加比,此时COD_(Mn)的去除率可达21%,同时能保证氨氮能稳定达标。  相似文献   

4.
不同填料生物接触氧化工艺处理有机废水对比研究   总被引:1,自引:0,他引:1  
选取组合填料、MBBR填料作为生物接触氧化池的填料,通过考察挂膜启动时间、生物膜生物相、LAS和COD去除效果、附着生物膜数量及悬浮污泥沉降性能等指标,进行不同类型填料处理有机废水性能的比较研究。结果表明:组合填料的挂膜速度较快,约为13d,MBBR填料需要25d左右,且组合填料表面生物膜厚度大于MBBR填料表面生物膜厚度;组合填料与MBBR填料达到最佳去除效果所需的DO浓度分别为4.0mg/L和3.0mg/L,去除率分别为89.9%和90.4%;MBBR填料生物膜中的活性生物膜量高于组合填料,不仅处理效果较好,运行费用较低,还具有较好的污泥沉降性能,因此,MBBR填料综合性能较好。  相似文献   

5.
高盐度会对微生物的生长造成危害,针对此问题,采用移动床生物膜工艺(MBBR)高盐驯化法来进行研究,通过小试研究了2种高盐驯化方法,一种为阶梯式高盐驯化法,另一种为直接高盐驯化法,最后驯化的目标氯离子含量都为12g/L。通过天津某污水处理厂中试测定,氯离子含量达到12g/L时,出水COD均值在30mg/L以下,出水氨氮均值在1mg/L以下,出水TN在10mg/L以下。由中试可知,MBBR工艺对高盐度废水具有良好的抗冲击能力,在进水氯离子含量高达12g/L及以上时仍可实现出水氨氮、TN等各指标稳定达标,系统能保持良好的处理效果,耐高盐性能佳。  相似文献   

6.
南区污水处理厂的出水TN难以稳定达到浙江省清洁排放标准,为提高生物脱氮效率,对现有AAO生反池进行了基于移动床生物膜工艺(MBBR)的升级改造。填料是MBBR的核心载体,结合MBBR工艺改造及其调试,研究了影响填料挂膜的因素,结果表明充足的碳源、适宜的曝气流化情况、较低的污泥浓度有利于填料挂膜。通过改造曝气系统优化了填料区整体流态,并通过综合分析表明南区污水处理厂冬季启动改造是最佳的选择。  相似文献   

7.
北方某污水处理厂规模为10万m3/d,自2017年以来开始受海水倒灌冲击,污水处理厂中氯离子浓度和电导率随着潮汐潮位的变化呈现出波动性变化。污水处理厂采用改良AAO+MBBR工艺,在氯离子浓度频繁波动的情况下仍保持较高的脱氮除磷效果。通过试验研究发现,MBBR悬浮载体具有较好的抗冲击能力,氯离子波动冲击对于悬浮载体的硝化效果无明显影响,而对活性污泥的硝化过程具有明显的抑制作用。在反硝化方面,氯离子冲击会降低反硝化速率,此时需要延长缺氧区HRT或增大碳源投加量来保证TN的去除。采用改良AAO镶嵌MBBR工艺,通过好氧区投加悬浮载体,扩大缺氧区HRT。实践证明该工艺在硝化和反硝化效果上抗冲击性能良好,适用于高盐废水的处理。  相似文献   

8.
采用小试规模的移动床生物膜反应器(MBBR)处理高温聚氯乙烯(PVC)母液废水,试验结果表明,在反应器进水温度为30~60 ℃、设计流量为12 L/h、HRT 14 h时,出水COD_(Cr)≤30 mg/L,温度对MBBR水处理系统净化功能存在着一定的影响.  相似文献   

9.
焦化废水中有机物在活性污泥法处理中的去除特性   总被引:2,自引:0,他引:2  
本文采用完全混合式活性污泥法,较系统地研究了焦化废水中有机物的去除特性。结果表明:焦化废水是含芳香族化合物和杂环化合物的典型废水,废水中有机物去除负荷与曝气池出水中有机物之可生物降解部分符合一级反应关系;通过延长水力停留时间或增大污泥浓度,可以在一定程度上改善有机物的去除效果,但仅通过改变处理工艺的运行参数难以使出水达标,原因在于废水中含有一定数量的难降解有机物。  相似文献   

10.
张子潇  魏屹  王京涛  孙萌  芦占赢 《给水排水》2020,56(5):112-117,122
北京某污水处理厂提标改造工程规模为5万m~3/d,在分析现有污水处理厂工艺、处理水质及运行情况的基础上,结合本次提标出水水质指标,选择以MBBR为主处理工艺对现污水处理厂二级出水进行深度处理,新建进水提升泵房、MBBR池、气浮车间、CMF及臭氧接触氧化等处理单元。由于现污水处理厂进水95%以上为工业废水,进水水质复杂可生化性较差,通过现状SBR工艺处理后的污水营养物质比例失衡,且污水中剩余物质较难降解。通过MBBR及后续工艺进行处理,出水COD、BOD_5、NH_3-N、TN、TP、SS的年平均值为21.7 mg/L、3.1 mg/L、0.57 mg/L、7.84mg/L、0.15mg/L、2.54mg/L,年平均去除率为31%、26%、70%、23%、42%、70%;MBBR工艺能有效去除污水处理厂二级出水中较难降解的污染物,出水水质较为稳定。  相似文献   

11.
改进型移动床生物膜反应器处理有机废水的试验   总被引:1,自引:0,他引:1       下载免费PDF全文
改进型移动床生物膜反应器(CMCBR)是在普通移动床生物膜反应器中引入导流板,使填料在全池循环移动,消除了普通移动床生物膜反应器的死角。在CMCBR处理模拟生活污水的试验中,研究了有机物的去除效果,考察了容积负荷、水力停留时间、冲击负荷等参数对处理效果的影响。试验发现,在填料填充比例为50%(体积比),进水COD质量浓度为320~550mg/L,水力停留时间为3 h的条件下,出水COD质量浓度小于100 mg/L,达到国家污水综合排放标准的一级标准。反应器具有较强的抗冲击负荷能力,出水水质稳定。  相似文献   

12.
The effect of moving bed biofilm reactor (MBBR) loading rate on membrane fouling rate was studied in two parallel units combining MBBR and membrane reactor. Hollow fiber membranes with molecular weight cut-off of 30 kD were used. The HRTs of the MBBRs varied from 45 min to 4 h and the COD loading rates ranged from 4.1 to 26.6 g COD m(-2) d(-1). The trans-membrane pressure (TMP) was very sensitive to fluxes for the used membranes and the experiments were carried out at relatively low fluxes (3.3-5.6 l m(-2) h(-1)). Beside the test with the highest flux, there were no consistent differences in fouling rate between the low- and high-rate reactors. Also, the removal efficiencies were quite similar in both systems. The average COD removal efficiencies in the total process were 87% at 3-4 h HRT and 83% at 0.75-1 h HRT. At high loading rates, there was a shift in particle size distribution towards smaller particles in the MBBR effluents. However, 79-81% of the COD was in particles that were separated by membranes, explaining the relatively small differences in the removal efficiencies at different loading rates. The COD fractionation also indicated that the choice of membrane pore size within the range of 30 kD to 0.1 microm has very small effect on the COD removal in the MBBR/membrane process, especially with low-rate MBBRs.  相似文献   

13.
This paper studies the effect of organic load rate (OLR) and nutrient ratio on operation stability of the moving bed bioreactor (MBBR) for kraft mill wastewater treatment, analyzing the incidence of polyhydroxyalkanoate (PHA) production. The MBBR operating strategy was to increase OLR from 0.25 ± 0.05 to 2.41 ± 0.19 kg COD m(-3) d(-1) between phases I and IV. The BOD(5):N:P ratio (100:5:1 and 100:1:0.2) was evaluated as an operation strategy for phases IV to V. A stable MBBR operation was found when the OLR was increased during 225 days in five phases. The maximum absolute fluorescence against the proportion of cells accumulating PHA was obtained for an OLR of 2.41 ± 0.19 kg COD m(-3)d(-1) and a BOD(5):N:P relationship of 100:1:0.2. The increase of PHA biosynthesis is due to the increased OLR and is not attributable to the increased cell concentration, which is maintained constant in stationary status during bioreactor biosynthesis.  相似文献   

14.
A combined process consisted of a Moving-Bed Biofilm Reactor (MBBR) and chemical coagulation was investigated for textile wastewater treatment. The pilot scale MBBR system is composed of three MBBRs (anaerobic, aerobic-1 and aerobic-2 in series), each reactor was filled with 20% (v/v) of polyurethane-activated carbon (PU-AC) carrier for biological treatment followed by chemical coagulation with FeCl2. ln the MBBR process, 85% of COD and 70% of color (influent COD = 807.5 mg/L and color = 3,400 PtCo unit) were removed using relatively low MLSS concentration and short hydraulic retention time (HRT = 44 hr). The biologically treated dyeing wastewater was subjected to chemical coagulation. After coagulation with FeCl2, 95% of COD and 97% of color were removed overall. The combined process of MBBR and chemical coagulation has promising potential for dyeing wastewater treatment.  相似文献   

15.
Moving bed bioreactors (MBBR) and fixed bed bioreactors (FBBR) were compared for biological phosphorus removal and denitrification. The sorption denitrification P-elimination (S-DN-P) process was selected for this study. Results indicated that all nutrients were removed by the FBBR process compared with the MBBR process: 19.8% (total COD), 35.5% (filtered COD), 27.6% (BOD(5)), 62.2% (acetate), 78.5% (PO(4)-P), and 54.2% (NO(3)-N) in MBBR; 49.7% (total COD), 54.0% (filtered COD), 63.2% (BOD(5)), 99.6% (acetate), 98.6% (PO(4)-P), and 75.9% (NO(3)-N) in FBBR. The phosphate uptake and NO(3)-N decomposition in the FBBR process during the denitrification phase were much higher than for the MBBR process despite being of shorter duration. Results obtained from this study are helpful in elucidating the practical implications of using MBBR and FBBR for the removal of bio-P and denitrification from wastewater.  相似文献   

16.
Innovations in wastewater treatment: the moving bed biofilm process.   总被引:3,自引:0,他引:3  
This paper describes the moving bed biofilm reactor (MBBR) and presents applications of wastewater treatment processes in which this reactor is used. The MBBR processes have been extensively used for BOD/COD-removal, as well as for nitrification and denitrification in municipal and industrial wastewater treatment. This paper focuses on the municipal applications. The most frequent process combinations are presented and discussed. Basic design data obtained through research, as well as data from practical operation of various plants, are presented. It is demonstrated that the MBBR may be used in an extremely compact high-rate process (<1 h total HRT) for secondary treatment. Most European plants require P-removal and performance data from plants combining MBBR and chemical precipitation is presented. Likewise, data from plants in Italy and Switzerland that are implementing nitrification in addition to secondary treatment are presented. The results from three Norwegian plants that are using the so-called combined denitrification MBBR process are discussed. Nitrification rates as high as 1.2 g NH4-N/m2 d at complete nitrification were demonstrated in practical operation at low temperatures (11 degrees C), while denitrification rates were as high as 3.5g NO3-Nequiv./m2.d. Depending on the extent of pretreatment, the total HRT of the MBBR for N-removal will be in the range of 3 to 5 h.  相似文献   

17.
The aerated bioreactor is a promising technology for wastewater treatment. Activated carbon fiber (ACF) used as a biomembrane carrier in wastewater disposal has attracted much more concern recently. The high modulus polyacrylonitrile (PAN)-based ACF was successfully used as a biomembrane carrier for hard-to-biodegrade industrial organic wastewater disposal in a lab-scale aerated biomembrane reactor at room temperature. The biocompatibility test shows that the biomembrane grows quickly on the ACF filler (ACFF) surface; bacteria and microzoon can breed on the ACFF surface at high chemical oxygen demand (COD) concentration. The COD removal rate tests show that the ACFF bioreactor has high capability to remove COD.  相似文献   

18.
This work suggests a procedure to correctly calibrate the parameters of a one-dimensional MBBR dynamic model in nitrification treatment. The study deals with the MBBR configuration with two reactors in series, one for carbon treatment and the other for nitrogen treatment. Because of the influence of the first reactor on the second one, the approach needs a specific calibration strategy. Firstly, a comparison between measured values and simulated ones obtained with default parameters has been carried out. Simulated values of filtered COD, NH(4)-N and dissolved oxygen are underestimated and nitrates are overestimated compared with observed data. Thus, nitrifying rate and oxygen transfer into the biofilm are overvalued. Secondly, a sensitivity analysis was carried out for parameters and for COD fractionation. It revealed three classes of sensitive parameters: physical, diffusional and kinetic. Then a calibration protocol of the MBBR dynamic model was proposed. It was successfully tested on data recorded at a pilot-scale plant and a calibrated set of values was obtained for four parameters: the maximum biofilm thickness, the detachment rate, the maximum autotrophic growth rate and the oxygen transfer rate.  相似文献   

19.
Anaerobic on-site treatment of black water (BW) and a mixture of black water and kitchen waste (BWKW) was studied in a two-phased upflow anaerobic sludge blanket septic tank (UASBst) at 10-20 degrees C. The processes were fed either continuously or discontinuously (twice per weekday). Moreover, BWKW was post-treated for nitrogen removal in an intermittently aerated moving bed biofilm reactor (MBBR) at 20 degrees C. Removal of total chemical oxygen demand (COD1) was efficient at minimum 90% with all three UASBst at all temperatures. Removal of dissolved COD (CODdis) was also high at approx. 70% with continuously fed BW and discontinuously fed BWKW, while with discontinuous BW feeding it was 20%. Temperature decrease had little effect on COD removals, though the need for phase 2 increased with decreasing temperature, especially with BWKW. Post-treatment of BWKW in MBBR resulted in approx. 50% nitrogen removal, but suffered from lack of carbon for denitrification. With carbon addition, removal of ca. 83% was achieved.  相似文献   

20.
In this paper, a novel process for organic acids and nutrient recovery from municipal sludge was introduced and evaluated based on laboratory-scale studies. An economical estimation for its practical application was also performed by mass balance in a full-scale plant (Q=158,000 m3 d(-1)). This novel process comprises an upflow sludge blanket-type high performance elutriated acid fermenter (5d of SRT) for organic acids recovery followed by an upflow-type crystallisation (3 h of HRT) reactor using waste lime for nutrient recovery. In the system, the fermenter is characterised by thermophilic (55 degrees C) and alkaline conditions (pH 9), contributing to higher hydrolysis/acidogenesis (0.18 g VFA(COD) g(-1) VSS(COD), 63.3% of VFA(COD)/COD produced, based on sludge characteristics of the rainy season) and pathogen-free stabilised sludge production. It also provides the optimal condition for the following crystallisation reactor. In the process, the waste lime, which is an industrial waste, can be used for pH control and cation (Ca and Mg) sources for crystallisation reaction. A cost estimation for full-scale application demonstrates that this process has economic benefits (about 67 dollars per m3 of wastewater except for the energy expense) even in the rainy season.  相似文献   

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