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比通量
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  specific flux
     After physical and chemical cleaning of membrane,the membrane specific flux for MCR and MBR is recovered respectively to 99.7% and 76.9% of pure water specific flux,and physical cleaning makes more contribution to it.
     MCR和MBR的膜组件经物理、化学清洗后膜比通量分别恢复至新膜比通量的99.7%和76.9%,物理清洗对此的贡献较大。
短句来源
     Operation of MBR and MCR for micro-polluted surface water treatment was investigated,and it was found by comparing the variation of membrane specific flux (SF) that membrane fouling of MBR is more serious than that of MCR.
     膜污染是影响膜反应器稳定运行的重要原因之一,为此考察了膜生物反应器(MBR)和膜混凝反应器(MCR)处理微污染地表水时的运行状况,并对膜比通量的变化进行了比较,发现MBR的膜污染情况比MCR的严重。
短句来源
     and when the temperature of influent increased 1 centigrade degree,the specific flux of membrane increased 2.42 percent.
     水温对膜比通量有较大影响,水温每升高1℃,膜比通量约增加2.42%.
短句来源
     After the cleaning of the old membrane, its effluent TOC concentration will decline along with the falling of membrane specific flux.
     旧膜经清洗后,其出水的TOC浓度随着膜比通量的下降而降低。
短句来源
     The membrane specific flux is about 2times as that in the system without PAC and the membrane fouling can be deayed effectively.
     系统运行稳定后,膜比通量是不添加PAC时的2倍左右,可有效地延缓膜污染的发生。
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  “比通量”译为未确定词的双语例句
     The flux ofmembrane A was recovered to 99.17%, 112.35% and 158.86% after cleaned by tapwater, 10% hydrochloric acid and 0.5% hypochlorite sodium respectively. At sameconditions, the flux of membrane B was recovered to 95.88%, 108.13% and 138.14%.
     经过预膜与未经预膜的两种膜在长时间运行之后通过清水清洗、10% 盐酸清洗和 0.5% 次氯酸钠清洗后膜比通量恢复情况分别为:99.17%和 95.88%,112.35%和 108.13%,158.86%和 138.14%,即经过预膜的膜污染相对易于清洗恢复。
短句来源
     Especially ultrasonic cleaning and NaClO rinse were found to be effective for recovering membrane permeability by 54% and 38% respectively.
     其中超声波清洗可使膜比通量恢复 5 4 %,碱洗可进一步恢复 38%。
短句来源
     An orthogonal array design was adopted to investigate effects of operational parameters including aeration intensity, membrane flux, MLSS, ratio of suction time and non-suction time on membrane filtration of two membrane module of M1 and M2. The results showed that M1 could weaken the negative influence of disadvantage parameters including high MLSS, high membrane flux, and low aeration intensity on membrane flux.
     结果表明 ,M 1膜组件可以弱化不利条件如高污泥浓度 (MLSS)、高运行膜通量和低曝气强度的影响 ; 曝气量和运行膜通量是影响膜比通量的主要因素 ;
短句来源
     They helped to improve the filterability of the mixed liquor through increasing the porosity of cake layer on the membrane surface or the floc size distribution,and correspondingly decrease the cake resistance Rc to 51.4% and 33.3% of the original MBR process respectively. PAC addition and biodegradability improvement of raw water both decreased the accumulation of organic pollutants in the mixed liquor.
     试验证实与原MBR工艺相比,投加PAC和采用可生化性较好的原水后,单位膜面积处理单位体积湖水时膜比通量的下降率分别由4.64%m-1下降至1.85%m-1和4.31%m-1。
短句来源
  相似匹配句对
     In this paper,the writer proves the existence theorem of Nash-Mequilibrium points under the weaker conditions than D.
     本文在 D.
短句来源
     V. C higher than families G.
     V.C家系G.
短句来源
     (2)the evapotranspirational latent heat flux decreased by 2% to 7%;
     (2) 土壤热通量对照增加48 % ~129 % ;
短句来源
     The Calculations of Reactor Fast Neutron Flux Spectrum and Specific Activity of Reactor Coolant
     反应堆快中子通量谱和载热剂活性的计算
短句来源
     The decline of membrane flux
     膜通量衰减
短句来源
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  specific flux
Two modes of downflow: In insaturated downflow there exists a critical water concentration c such that the corresponding hydraulic conductivity K(c) is equal to the descending specific flux.
      
The specific flux pinning force of the ribbons varied from 360 to 260 N m-2 and was found to decrease with ribbon thickness.
      
Dividing flux by NDF provides the specific flux which is the important measure of performance when comparing MF and UF pretreatment.
      
Figure 4 shows specific flux results of side-by-side, pilot-scale experiments with and without an antiscalant present.
      
Figure 1 shows the specific flux profiles for the three membrane systems corrected to 20C.
      
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MBR was used to treat highloading ammonia nitrogen wastewater. Emphases were put on the ammonia nitrogen removal, the organics removal and the changes of membrane specific flux. The results showed that the reactor had stable runing, and NH3N in effluent was lower than 3mg/L on an average. MBR held an ability to resist organic shock loading. The NH3N volumetric load was 1.11kg/(m3·d). During the operation period, the decline rate of membrane specific flux was much lower and it was considered that high density...

MBR was used to treat highloading ammonia nitrogen wastewater. Emphases were put on the ammonia nitrogen removal, the organics removal and the changes of membrane specific flux. The results showed that the reactor had stable runing, and NH3N in effluent was lower than 3mg/L on an average. MBR held an ability to resist organic shock loading. The NH3N volumetric load was 1.11kg/(m3·d). During the operation period, the decline rate of membrane specific flux was much lower and it was considered that high density of aeration, low C/N ratio and dominant growth of autotrophic bacteria were the main contributors to this phenomenon.

试验采用MBR处理高氨氮废水,重点分析了氨氮、有机物的去除以及膜比通量变化等。结果表明,工艺运行稳定,出水氨氮平均浓度低于3mg/L,MBR能够抵抗有机物冲击负荷,氨氮容积负荷可以达到1.11kgNH3-N/(m3·d)。在整个运行期间膜比通量下降比较缓慢,分析认为是高曝气量、低碳氮比以及自养菌的优势生长起了主要作用。

Membrane fouling and cleaning methods in the PAC (powdered activated carbon) combined MBR (membrane bioreactor) applied to purify slightly-polluted raw water were investigated. By SEM (Scanning Electronic Microscope) observation, it was found that the membrane fouling on the exterior surface was mainly attributive to the gel layer consisted of PAC, activated sludge and so on, while the inner membrane surface has been little fouled. Combined cleaning including extended aeration, ultrasonic cleaning, rinses by...

Membrane fouling and cleaning methods in the PAC (powdered activated carbon) combined MBR (membrane bioreactor) applied to purify slightly-polluted raw water were investigated. By SEM (Scanning Electronic Microscope) observation, it was found that the membrane fouling on the exterior surface was mainly attributive to the gel layer consisted of PAC, activated sludge and so on, while the inner membrane surface has been little fouled. Combined cleaning including extended aeration, ultrasonic cleaning, rinses by 0.3% NaClO solution and 2% HCl solution could recover membrane permeability over 95%. Especially ultrasonic cleaning and NaClO rinse were found to be effective for recovering membrane permeability by 54% and 38% respectively. From the measurement of molecular weight distributions of extracted liquid in each cleaning step, it was found that the aerated liquid had 70% organics whose molecular weight exceeded 20 000, and ultrasonic cleaning mainly removed the organics with molecular weight lower than 4 000. Organic matters were presumed to be mainly responsible for the membrane fouling.

对粉末活性炭 膜生物反应器 (PAC MBR)组合工艺处理微污染水源水过程中的膜污染进行了分析 ,并对膜清洗方法进行了研究。扫描电镜观察表明 ,由活性炭、活性污泥等相互粘结形成的凝胶层是膜外表面的主要污染物 ,而膜内表面污染不明显。采用曝气清洗、超声波清洗、NaClO碱洗、HCl酸洗可有效地使污染膜的通透性能最终恢复到 95 %以上。其中超声波清洗可使膜比通量恢复 5 4 %,碱洗可进一步恢复 38%。各级洗脱液分子量分布测定结果表明 :曝气洗脱液中分子量大于2 0 0 0 0的有机物约占 70 %;而超声波主要去除的是分子量小于 4 0 0 0的有机物 ;碱洗脱液去除的UV2 54 占化学清洗总量的 92 %。通过清洗效果分析 ,有机污染是造成膜污染的主要原因。

An enhanced mechanical-cleaning membrane module M1 and a mechanical-cleaning membrane module M2 were designed in this research. An orthogonal array design was adopted to investigate effects of operational parameters including aeration intensity, membrane flux, MLSS, ratio of suction time and non-suction time on membrane filtration of two membrane module of M1 and M2. The results showed that M1 could weaken the negative influence of disadvantage parameters including high MLSS, high membrane flux, and low aeration...

An enhanced mechanical-cleaning membrane module M1 and a mechanical-cleaning membrane module M2 were designed in this research. An orthogonal array design was adopted to investigate effects of operational parameters including aeration intensity, membrane flux, MLSS, ratio of suction time and non-suction time on membrane filtration of two membrane module of M1 and M2. The results showed that M1 could weaken the negative influence of disadvantage parameters including high MLSS, high membrane flux, and low aeration intensity on membrane flux. M1 and M2 module both maintained a high flux of 40L/(h·m2) under the conditions of MLSS 6g/L, aeration 0.5 m3/h, ratio of suction time and non-suction time of 12/1, which was selected by the study of orthogonal array. Resistance distribution showed that the mechanism of mechanical-cleaning help to remove the sludge cake pollution on membrane surface.

试验设计了强化机械清洗膜组件M1和机械清洗膜组件M2 ,通过正交试验考察了污泥浓度、曝气量、运行膜通量和抽吸时间∶间歇时间对 2组膜组件的膜过滤特性的影响 .结果表明 ,M 1膜组件可以弱化不利条件如高污泥浓度 (MLSS)、高运行膜通量和低曝气强度的影响 ;曝气量和运行膜通量是影响膜比通量的主要因素 ;并得到一组较佳的操作条件组合 :污泥浓度 6g/L、曝气量 0 5m3 /h、抽吸时间和间歇时间的比为 12∶1.在此条件下长期运行试验表明 ,M1和M 2膜通量均可以维持在 4 0L/ (h·m2 ) .通过测定 2组膜组件的阻力分布 ,表明机械清洗可以大大减弱膜面泥饼层污染 .

 
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