CN102180542A - Rapid and stable operation method of authigene dynamic membrane component - Google Patents

Rapid and stable operation method of authigene dynamic membrane component Download PDF

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CN102180542A
CN102180542A CN 201110083862 CN201110083862A CN102180542A CN 102180542 A CN102180542 A CN 102180542A CN 201110083862 CN201110083862 CN 201110083862 CN 201110083862 A CN201110083862 A CN 201110083862A CN 102180542 A CN102180542 A CN 102180542A
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flux
dynamic
operation
membrane
dynamic membrane
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CN 201110083862
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CN102180542B (en )
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何君
洪树虎
熊江磊
王盘云
陆俊锋
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江苏百纳环境工程有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage
    • Y02W10/15Aerobic processes

Abstract

The invention relates to a rapid and stable operation method of an authigene dynamic membrane component. The method is characterized in that flux which is 2-6 times of operation flux is adopted at the preliminary stage of dynamic membrane formation so as to achieve rapid membrane formation within 3-5 minutes; after a dynamic membrane is formed, normal operation is carried out so as to reduce overcurrent flux, wherein the flux which is 0.8-0.95 time of critical flux is maintained for operation; and bottom aeration, reverse aeration and reverse union gap and/or impulse rinse are adopted for gas and water washing, thereby overcoming the inherent defects of long dynamic membrane formation time, short high-flux effective filtration time and poor washing effect, achieving industrial operation and clearing away the obstruction for the industrial operation of the authigene dynamic membrane component.

Description

自生动态膜组件快速及稳定运行方法 Autogenous dynamic membrane modules fast and stable operation method

技术领域 FIELD

[0001] 本发明涉及一种可以确保早期出水快速达标、稳定运行通量大周期长、反洗速度快清洗彻底效果好的自生动态膜组件快速及稳定运行方法。 [0001] The present invention relates to fast water can be ensured early standard, stable operation of long period of flux, thorough cleaning backwash fast good effect autogenous dynamic membrane and rapid method for stable operation.

背景技术 Background technique

[0002] 动态膜(Dynamicmem-brane)为通过在膜基材表面形成污泥层起到精密截留作用的一种新型膜组件,其中自生动态膜是在过滤过程中由污泥絮体(微生物及其代谢产物) 为涂膜材料累积形成膜层。 [0002] The dynamic membrane (Dynamicmem-brane) functions by forming a new layer of sludge membrane precise interception of the surface of the film substrate, wherein the film is a dynamic self during filtration by the floc (and microorganisms its metabolites) as accumulated coating material layer is formed. 其形成时间及厚度及生物量等与运行条件密切相关,有文献报导污泥絮体累积速率约为(T50g/(m2h),因而“膜层”形成相对较慢并且难以稳定,导致动态膜形成时间较长,通常在30分钟至几小时不等,由此初期水质难以满足要求(有效过滤作用只有在污泥层形成至一定厚度才能发挥作用),只能采用大回流量至成膜,从而增加了前道池负荷;其次,动态膜在运行时因高污泥浓度易出现膜层增长过快,导致出水通量下降,有效运行周期相对较短,并且缺乏有效的控制措施;再就是,动态膜反洗效果差,出水通量恢复率低,导致正常产水量小,时间长后很容易产生不可逆污染,导致药洗频繁,增加了运行成本和操作复杂程度。此三大缺陷成为制约自生动态膜组件有效利用主要障碍。 Formation time and thickness and which biomass is closely related to the operating conditions reported in the literature about the floc accumulation rate (T50g / (m2h), and thus "film" is formed relatively slow and difficult to stabilize, resulting in dynamic membrane formation longer period of time, typically ranging from 30 minutes to several hours, whereby the initial quality not meet the requirements (effective filtration in the sludge layer is formed only to a certain thickness to play a role), using only a large return flow to the film formation, whereby increasing the pool of front-loading; secondly, prone dynamic membrane during operation due to the high concentration of the sludge layer growing too fast, resulting in decreased water flux and effective operation cycle is relatively short, and the lack of effective control measures; Then, poor dynamic membrane backwash, the water flux recovery rate is low, resulting in a small normal water production, after a long time is very prone to irreversible fouling, leading to frequent washing agents, increased operating costs and the complexity of the operation. this defect becomes restricted autogenous three effective use of the dynamic membrane module major obstacle.

[0003] 同济大学,2005 [动态膜生物反应器工艺研究],提出以高通量(>0.85m/h)出水2、min,后在稍低通量<0. 3m/h下出水,达到快速成膜。 [0003] Tongji University, 2005 [Dynamic membrane bioreactor process], proposed in a high throughput (> 0.85m / h) Water 2, min, after the water in the lower flux <0. 3m / h, to reach fast film. 其成膜后仍然采用高通量出水,易使形成的动态膜过于致密而稳定通量锐减,稳定时间短一般为纩12h。 Which remain after the film formation with high water flux, easy to make too dynamic membrane formed dense and stable flux dropped, a short settling time is usually fine cotton 12h. 同济大学,2007 [高效自生动态膜技术的初步研究],提出了变水头、变通量运行方式,即利用初始液位高增大初始通量(0.6、. 7 m/h),挂膜成功后靠水位下降自动调低稳定运行通量(0.05、. 06 m/ h)。 Tongji University, 2007 [efficient autogenous Preliminary Study of membrane technology], proposed variable head, the amount of work operation mode, i.e., with an initial increase in the level of high initial flux (0.6 ,. 7 m / h), successful biofilm by automatically lowering the water level drops and stable operation of the flux (0.05 ,. 06 m / h). 此法成膜早期大通量是通过抬高液位实现,成膜后通过降低液位保持所需通量,使得生化池建造容积大大增加,降低了池容的有效利用率;其次,成膜通量与运行通量差距过大达10倍以上,形成的动态膜过于致密,难以长期稳定运行,且稳定运行通量缺乏准确的测定方法。 This method is large flux early deposition by raising the level achieved after film formation by reducing the maintenance of the required level of flux, so that the construction of biochemical pool volume greatly increases, reducing the effective utilization of the capacity pool; secondly, the deposition flux and flux gap is too large to run more than 10 times the dynamic membrane formation of too dense, difficult long-term stable operation and stable operation of the flux lack of accurate measuring method.

[0004] 中国专利CN 1168680C动态膜生物反应器,采用20cm以下水位差驱动过滤从而形成动态膜;出现膜污染时,通过加大膜面错流流速方式清除膜面污染。 [0004] Chinese patent CN 1168680C dynamic membrane bioreactor, using 20cm below the water to form a difference drive dynamic membrane filtration; occurs when membrane fouling, contamination removal membrane surface membrane surface by increasing the flow rate of cross-flow mode. 该方法不仅形成动态膜速度较慢的缺点依然存在;而且通过加大膜面流速方式清洗膜面污染,只能达到膜表面清洗再生,对于累积在膜孔内部的堵塞污染难以达到理想效果,导致膜有效利用周期短。 The method not only slow dynamic membrane formed drawbacks still exist; and by increasing the flow rate of the membrane surface membrane surface cleaning methods contamination, the membrane surface washing regeneration can only achieve, for accumulated inside the membrane pores clogging of pollution is difficult to achieve the desired effect, resulting in short film effective use period.

[0005] 中国专利CN 100349805C动态膜微滤膜组件及水处理工艺方法。 [0005] dynamic membrane microfiltration membrane and water treatment process for Chinese patent CN 100349805C. 将膜组件置于混合液中,在一定表面错流下,使微生物在滤网表面粘附形成动态膜。 The mixture was placed in the membrane module, the flow to some wrong surface, microorganisms adhered to the screen surface is formed on the dynamic membrane. 反洗方式为气泡冲刷后进行水力反洗。 Hydraulic backwashing the backwashing mode is performed after scouring bubbles. 该方法仅依靠表面吸附形成动态膜,速度很慢;气泡冲刷可去除动态膜表面滤饼层,用水反洗去除膜孔内堵塞。 The adsorption method relies on only the surface to form a dynamic film is very slow; dynamic bubble scour the membrane surface may be removed cake layer, removing water backwashing the membrane pores clogging. 由于动态膜基材孔径较大,水力反洗耗水量会很大,且需较大压力,造成清洗能耗较高,实际对外产出水量减少很多。 Due to the dynamic film substrate larger aperture, hydraulic backwash water consumption will be great, and needs more pressure, resulting in higher clean energy, reduce the number of actual external output water.

[0006] 中国专利CN 100558655C动态膜生物反应器反洗运行方法,在需要反洗时, 关闭出水口,采用逆反应器出水方向进行曝气,使气体通过出水口进入膜组件,强度为1. 6^8. 0m3/ (!^,!^,反洗时间为^巧!^!!。连续逆向曝气反洗,因清洗导致膜堵塞逐渐降低,难以保证在气洗时间内基材内外高的压力差,导致气洗后期效果降低,使得整体反洗效果不理想。 [0006] Chinese Patent CN 100558655C dynamic membrane bioreactor method of backwashing operation, the backwash when necessary, close the outlet, the reactor effluent by reverse directions aerating gas into the membrane through the outlet, the strength of 1.6 ^ 8. 0m3 / (! ^,! ^, ^ backwash time coincidence! ^ !! continuous aeration backwash reverse, due to clogging of the membrane resulting in decreased washing, it is difficult to ensure the high and outside air wash time base pressure difference, resulting in reduced air wash late effects, so that the overall effect is not ideal backwash.

发明内容 SUMMARY

[0007] 本发明目的在于克服上述现有技术的不足,提供一种成膜时间短,可以确保早期出水快速达标,大通量稳定运行时间长,反洗时速度快清洗彻底效果好的自生动态膜组件快速及稳定运行方法。 [0007] The object of the present invention is to overcome the shortcomings of the prior art described above, there is provided a film forming time is short, to ensure rapid early water standards, a large flux of stable operation for a long time, good speed and thorough cleaning effect dynamic self backwashing fast and stable operation of membrane method.

[0008] 本发明目的实现,主要改进一是在动态膜形成初期,加大过流通量(例如为正常过滤通量的2-6倍),通过加大通量增加截留污泥量达到快速成膜,因成膜时间短,回流对调节或生化池影响小;二是在动态膜形成后转入正常过滤运行时,降低过流通量至略小于(0. 8 — 0. 95倍)临界通量状态,在保持高通量下延长动态膜的清洗周期,克服了通常运行在临界通量以上造成运行周期短的不足;三是在需要反清洗时利用底部曝气、逆向曝气和逆向进水联合进行间隙和/或脉冲式清洗,底部曝气冲刷基材表面,逆向曝气、逆向进水采用间隙和/或脉冲式清洗,有利于保持在气洗时间内基材内外的高压力差,提高了清洗效果,从而实现动态膜运行初期的快速成膜,以及成膜后大通量长周期稳定运行,并且清洗彻底效果好,克服了现有技术的不足,实现本发明目 [0008] The object of the present invention is achieved, one major improvements in the early formation of the dynamic membrane, through increased circulation (e.g., 2 to 6 times the normal filtration flux), the flux increased by increasing the amount of sludge to achieve fast to interception film, because the film forming time is short, little effect on the regulation reflux or biochemical pool; second filtration operation becomes normal after the dynamic membrane is formed, the circulation through reduced to slightly less than (0. 8 - 0.95 times) the critical pass the amount of state extended dynamic membrane cleaning cycle is maintained at high-throughput, causing the normal operation to overcome the deficiencies in the operation cycle shorter than the critical flux; aeration bottom third is to use anti-cleaning when necessary, aeration and reverse feed reverse water joint / pulse cleaning, aeration or bottom surface of the gap and flush substrate, aeration reverse, reverse water using gaps and / or pulse cleaning, help to maintain the air wash time in the high pressure difference inside and outside the substrate improve the cleaning effect, so that the initial rapid deposition run dynamic membrane, and a stable operation of long period after forming large flux, and thoroughly good cleaning effect, to overcome the deficiencies of the prior art, the object of the present invention to achieve . 具体说,本发明自生动态膜组件快速及稳定运行方法,其特征在于动态膜形成初期采用运行通量的2-6倍通量实现3 - 5分钟快速成膜;动态膜形成后转入正常运行降低过流通量,保持通量0. 8 — 0. 95倍临界通量运行;气、水清洗采用底部曝气、逆向曝气和逆向进水联合间隙和/或脉冲式清洗。 In particular, the present invention is a dynamic self fast and stable operation of the membrane module, characterized in that the initial film is formed using the dynamic operating flux flux 2-6 times to achieve 3--5 minute quick deposition; to normal operation after the dynamic membrane is formed reduced through circulation, to maintain the flux 0.8 - 0.95 times the critical flux operation; gas, water washing using a bottom aeration, aeration reverse and reverse inlet joint gaps and / or pulse cleaning.

[0009] 本发明中。 [0009] the present invention.

[0010] 临界通量,通过在动态膜形成后,测定不同出水压头下的出水流量,折算为平均膜通量,绘制不同出水压头下的膜通量曲线,曲线中明显拐点所对应的膜通量值即为该动态膜的临界通量,即临界通量采用工作曲线法进行测定。 [0010] Critical flux is formed by the dynamic membrane, different water flow measured at the head of water, converted into the average membrane flux, a flux at different pressure head plotted curve inflection point significantly is the value corresponding to the critical flux through the membrane of the dynamic membrane, i.e., critical flux was measured using the working curve method. 试验表明,如果长期运行在临界通量以上,则运行清洗周期明显缩短;而运行在临界通量以下较多,出水量就大降低。 Tests showed that in the long run if the critical flux or more, run the cleaning cycle was shortened; and run more or less in the critical flux, a large amount of water to be reduced. 并且试验还表明,同一污水、同一动态膜生物反应器,每次清洗后的临界通量大致接近,因此对于具体应用,只需测定一次,因而具有很强的操作实施性。 And the test also showed that the same water, the same dynamic membrane bioreactor, after washing each critical flux substantially close, so for a particular application, only one measurement, which has a strong operation of the embodiment.

[0011] 底部曝气、逆向曝气和逆向进水联合间隙和/或脉冲式清洗,底部曝气主要用于冲刷基材表面,清除基材表面污染物;逆向曝气、逆向进水,形成的逆向冲击力,有利于将嵌入膜基材内部的污染物冲出。 [0011] Bottom aeration, aeration reverse and reverse inlet joint gaps and / or pulse cleaning, the bottom surface of the flush is mainly used for aeration of the substrate, the substrate to remove surface contaminants; aeration reverse, reverse water, forming reverse impact, facilitate embedded contaminants out of the interior of the film substrate. 三者配合提高了清洗效果,清洗彻底。 Three with improved cleaning effect, a thorough cleaning. 逆向曝气、逆向进水, 既可以采用间隙进行,也可以采用强弱脉冲进行,还可以两者混合进行,这样虽然因清洗导致膜堵塞逐渐降低,但由于逆向曝气、逆向进水采用间隙和/或脉冲式,有利于保持在气洗时间内基材内外的高压力差,从而保证高的清洗效果,稳定运行通量大,连续运行周期长。 Aeration reverse, reverse water, it may be used for either the gap, the strength of the pulses may be employed, can be a mixture of both, although this leads to clogging of the membrane by washing decreased, but the reverse aeration, water using reverse gap and / or pulsed, in favor of maintaining the high pressure air wash time difference between the inside and outside of the substrate, thus ensuring a high cleaning effect, flux stable operation, long periods of continuous operation.

[0012] 动态膜形成初期的大通量,可以通过在膜组件上设置上下两个出水阀门,初期启动开启低位阀门(形成大的液位差)从而加大了出水通量,成膜正常运行关闭低位阀门,开启原正常阀门;也可以通过设置出水抽吸泵,通过调节出水抽吸泵的流量,实现成膜初期的大通量。 [0012] The initial dynamic membrane formed large flux can be provided by two upper and lower valve membrane module outlet, low initial start opening the valve (the formation of large level difference) thereby increasing the water flux, forming normal operation and close the lower valve, the valve normally opening the original; may be provided by a water suction pump, by adjusting the flow rate of the water suction pump, to achieve a large initial flux deposition. 本发明较好采用设置上下二个阀门结构,例如在正常出水阀门下方增设一阀门,实现成膜初期的大通量。 The present invention preferably uses two valves vertically disposed structures, such as the addition of a valve below the normal water valve, to achieve a large initial flux deposition.

[0013] 初期成膜通量为正常运行通量的2-6倍,及运行通量为0. 8 — 0. 95倍临界通量, 为本发明试验较佳区间,如果过流通量倍数降低,仅是延长成膜时间,过流通量倍数增高,虽然对成膜时间缩短是有利的,但试验发现会导致动态膜过于致密而造成通量下降和过滤周期缩短,因此确定2 - 6倍为适宜区间。 [0013] The initial deposition flux 2-6 times the normal operation flux, and the flux runs 0. 8 - 0.95 times the critical flux, the present invention is preferred test interval, if multiple circulation through reduced , only the film formation time is extended, multiple circulation through increased while shortening the time of film formation is advantageous, but found to cause dynamic test membrane flux decline caused by too dense and filtration cycles, it is determined 2--6 times the comfort zone. 同样运行通量为0. 8 — 0. 95倍临界通量也为优化区间,显然技术人员能够理解此区间并非数学意义上的精确端值。 Also running flux of 0. 8 - 0.95 times the critical flux is also optimized range, apparently the art to understand the value of this interval are not exactly end on a mathematical sense.

[0014] 本发明自生动态膜组件快速及稳定运行方法,相对于现有技术,由于成膜初期采用大通量过流(大通量启动模式),从而大大缩短了动态膜形成时间,3-5分钟即可达到有效过滤成膜,可减少工程调试时间,并且由于成膜时间短,初期回流对调节或生化池影响小;略低于临界通量运行,可使动态膜生物反应器稳定高通量运行周期延长,即高通量运行周期长,减少清洗操作;气、水清洗采用底部曝气、逆向曝气和逆向进水联合间隙和/或脉冲式清洗,清洗彻底速度快,大大提升动态膜清除效果,运行通量大,清洗周期长,解决了工业化运行实际有效运行时间短的难题。 [0014] The membrane module of the present invention is a dynamic self fast and stable operation of the method with respect to the prior art, since the early stage of deposition fluxes with large overcurrent (large flux start mode), thus greatly reducing the dynamic membrane formation time, 3- 5 minutes to achieve an effective filtering film formation time can be reduced engineering commissioning, and the film formation time is short, the initial adjustment reflux or little effect on the biochemical pool; running slightly below the critical flux, membrane bioreactor can dynamically stable high flux operation period is extended, i.e., high-throughput long operation cycle, reducing the washing operation; gas, water washing using a bottom aeration, aeration reverse and reverse inlet joint gaps and / or pulse cleaning, washing thoroughly speed, greatly enhance dynamic membrane cleaning effect, run flux, long cleaning cycle, the actual effective operation to solve industrial problems running time is short.

[0015] 以下结合二个具体实施例,示例性说明及帮助进一步理解本发明实质,但实施例具体细节仅是为了说明本发明,并不代表本发明构思下全部技术方案,因此不应理解为对本发明总的技术方案限定,一些在技术人员看来,不偏离本发明构思的非实质性增加和/ 或改动,例如以具有相同或相似技术效果的技术特征简单改变或替换,均属本发明保护范围。 [0015] below with reference to two specific examples, illustrative and further understanding of the spirit of the present invention, but the embodiments are merely specific details to illustrate embodiments of the present invention do not represent all technical idea of ​​the embodiment of the present invention, and therefore it should not be construed as limited overall aspect of the invention, some of the skilled person view, without departing from the substantial increase in non-inventive concept and / or modifications, for example, to have the same or similar technical effect of the features of a simple change or replace, the present invention belong protected range.

具体实施方式 detailed description

[0016]实施例 1 :试验水质:C0D280〜400mg/L,BOD5 为180〜260 mg/L,氨氮16〜32 mg/L。 [0016] Example 1: Test Water: C0D280~400mg / L, BOD5 of 180~260 mg / L, ammonia 16~32 mg / L. 采用外置式自生动态膜组件,共计4m2。 Using autogenous dynamic external membrane, a total of 4m2.

[0017] 首先在处理污水中投加0.2g/L活性污泥,逐步培养,7d后活性污泥浓度达到1. Omg/L左右,启动动态膜组件。 [0017] First, in the process of sewage adding 0.2g / L activated sludge, and gradually develop, the concentration of activated sludge 7d reached about 1. Omg / L, initiate dynamic membrane. 先用通量为900L/h出水量进行挂膜,出水回流至前端生化池,3min后动态膜形成,出水浊度为3NTU。 First with flux 900L / h for biofilm out of water, was refluxed to the front biochemical pool water, dynamic membrane formed after 3min, turbidity is 3NTU. 经测定形成的动态膜临界通量80 L/m2h,调低流量至300L/h (折算膜通量为75L/m2h)正常运行,运行采用侧流曝气,保持错流流速为3. 0 cm/s。 Dynamic membrane formed on the critical flux was determined to 80 L / m2h, to reduce the flow rate 300L / h (converted for the flux 75L / m2h) normal operation, the side stream operation using aeration, cross flow velocity is maintained 3. 0 cm / s. 50h后出水通量下降到60L/m2h,启动在线水气洗,底部曝气,逆向曝气结合逆向进水强弱脉冲IOmin (检测通量恢复至接近原来)。 After 50h water flux decreased to 60L / m2h, air wash water line starts, the bottom of the aeration, reverse and reverse water aeration intensity pulses IOmin (restored to near original flux detected). 重复“再生-运行-清洗”过程,运行40天。 Repeat "Regeneration - Run - cleansing" process, run 40 days. 40天后,进行维护性化学清洗,使用0. 2wt%次氯酸钠进行30min冲洗杀菌,清水冲洗后再次投入使用。 40 days for maintenance chemical cleaning, use 0. 2wt% sodium hypochlorite disinfection 30min wash, rinse with water and put into use again. 系统运行6个月后,进行恢复性化学清洗,将膜组件放空,采用0. 5衬%次氯酸钠浸泡8小时、间断曝气冲刷,清水冲洗1小时,之后用0. 盐酸进行酸洗,时间为2小时, 最后清水冲洗。 After six months of operation of the system, the recovery of chemical cleaning, the venting membrane, liner using 0.5% sodium hypochlorite soak for 8 hours intermittent aeration flushing, rinse with water for 1 hour followed by hydrochloric acid with 0.1, time 2 hours, and finally rinse with water. 重复启动、运行、清洗的过程。 Repeat startup, operation, cleaning process.

[0018]实施例 2 :试验水质:COD 16(T300mg/L,BOD5 为110〜210 mg/L,氨氮12〜25mg/L。采用内置式自生动态膜组件,共计250m2。 [0018] Example 2: Test water quality: COD 16 (T300mg / L, BOD5 of 110~210 mg / L, ammonia 12~25mg / L with built-in self dynamic membrane, a total of 250m2..

[0019] 首先在处理污水中投加0.2g/L活性污泥,逐步培养,7d后活性污泥浓度达到1. 2mg/L左右,启动动态膜组件。 [0019] First, in the process of sewage adding 0.2g / L activated sludge, and gradually develop, the concentration of activated sludge reach 7d 1. 2mg / L, initiate dynamic membrane. 先用通量为50T/h出水量进行挂膜,出水回流至前端调节池,5min后动态膜形成,出水浊度为5NTU。 First with flux 50T / h of water for the biofilm, the water returned to the front end of the conditioning tank, after the formation of the dynamic membrane 5min, turbidity is 5NTU. 经测定形成的动态膜临界通量90 L/m2h,调低流量至20T/h,折算运行通量为80L/m2h,采用侧流曝气,保持错流流速为3. 0 cm/s。 Dynamic membrane formed on the critical flux was determined to 90 L / m2h, flow down to 20T / h, flux was converted to run 80L / m2h, aeration using lateral flow, cross flow velocity is maintained 3. 0 cm / s. 7¾后出水通量下降到65L/m2h,启动在线水气洗,底部曝气,逆向曝气结合逆向进水间隙脉冲15min。 After 7¾ water flux decreased to 65L / m2h, air wash water line starts, the bottom of the aeration, aeration and reverse water gap reverse pulse 15min. 重复“再生-运行-清洗”过程,运行50天。 Repeat "Regeneration - Run - cleansing" process, run for 50 days. 50天后,进行维护性化学清洗,使用0.2 wt% 次氯酸钠进行30min冲洗杀菌,清水冲洗后再次投入使用。 After 50 days, maintenance of the chemical cleaning using a 0.2 wt% sodium hypochlorite for sterilizing rinsing 30min, rinse with water and put into use again. 系统运行6个月后,进行恢复性化学清洗,将膜组件放空,采用0. 5wt%次氯酸钠进行浸泡5小时、间断曝气冲刷,清水冲洗1小时,之后用0.4%盐酸进行酸洗,时间为1.5小时,最后清水冲洗。 After six months of operation of the system, the recovery of chemical cleaning, the venting membrane, using 0. 5wt% sodium hypochlorite soak for 5 hours intermittent aeration flushing, rinse with water for 1 hour, with 0.4% hydrochloric acid pickling, time 1.5 hours, and finally rinse with water. 重复启动、运行、清洗的过程。 Repeat startup, operation, cleaning process.

[0020]比较例:试验水质:⑶拟8(T400mg/L,B0D5 为180160 mg/L,氨氮16〜32 mg/L。采用外置式自生动态膜组件,共计4m2。 [0020] Comparative Example: Test water quality: Quasi ⑶ 8 (T400mg / L, B0D5 of 180160 mg / L, ammonia 16~32 mg / L using external autogenous dynamic membrane, a total of 4m2..

[0021] 首先在处理污水中投加0.2g/L活性污泥,逐步培养,7d后活性污泥浓度达到1. Omg/L左右,启动动态膜组件。 [0021] First, in the process of sewage adding 0.2g / L activated sludge, and gradually develop, the concentration of activated sludge 7d reached about 1. Omg / L, initiate dynamic membrane. 用通量为320L/h进行出水挂膜,出水外排,1小时后动态膜形成,出水浊度为3NTU。 With flux 320L / h for biofilm formation water, water efflux, dynamic membrane is formed after 1 hour, turbidity of 3NTU. 运行通量为85L/m2h(临界通量80 L/m2h)。 Run flux 85L / m2h (critical flux of 80 L / m2h). 采用侧流曝气,保持错流流速为3. O cm/s。 Aeration using lateral flow, cross flow velocity is maintained 3. O cm / s. 1¾后出水通量下降到60L/m2h,启动在线水气洗,底部曝气,逆向曝气结合,共40min。 After 1¾ water flux decreased to 60L / m2h, air wash water line starts, the bottom of the aeration, aeration reverse binding, a total of 40min. 重复“再生-运行-清洗”过程,运行10天。 Repeat "Regeneration - Run - cleansing" process, run for 10 days. 10天后,进行维护性化学清洗,使用0. 2wt%次氯酸钠进行60min冲洗杀菌,清水冲洗后再次投入使用。 After 10 days, a maintenance chemical cleaning, use 0. 2wt% sodium hypochlorite sterilization 60min wash, rinse and put into use again. 系统运行3个月后,进行恢复性化学清洗,将膜组件放空,采用0. 5wt%次氯酸钠进行浸泡10小时、间断曝气冲刷,清水冲洗2小时,之后用0. 4wt%盐酸进行酸洗,时间为5小时,最后清水冲洗。 After 3 months of system operation, the recovery of chemical cleaning, the venting membrane, using 0. 5wt% sodium hypochlorite soak for 10 hours intermittent aeration flushing, rinse with water for 2 hours before pickling with 0. 4wt% hydrochloric acid, time of 5 hours, and finally rinse with water. 重复启动、运行、清洗的过程。 Repeat startup, operation, cleaning process. 由对比可知,常规运行方法动态膜形成较慢时间长;高于临界通量运行,运行周期较短;通常水气联合反洗速度较慢,且污染积累严重,后续药洗时间较长。 Seen from the comparison, a conventional film forming method of operating a dynamic long time slow; above the critical flux operation, a shorter operating cycle; Joint backwash water vapor typically slow, and the accumulation of serious contamination, subsequent washing agent longer.

[0022] 对于本领域技术人员来说,在本专利构思及具体实施例启示下,能够从本专利公开内容及常识直接导出或联想到的一些变形,本领域普通技术人员将意识到也可采用其他方法,或现有技术中常用公知技术的替代,以及特征的等效变化或修饰,特征间的相互不同组合,例如初期运行通量在2-6倍间不同变化,运行通量在0. 8 — 0. 95倍临界通量间变化, 或略稍超出此范围,等等的非实质性改动,同样可以被应用,都能实现本专利描述功能和效果,不再一一举例展开细说,均属于本专利保护范围。 [0022] For the skilled person, in embodiments of the present patent conception and specific embodiment under inspiration, can be derived from the knowledge and the disclosure of this patent or directly to associate some variations, those of ordinary skill in the art will recognize that may be employed other methods, or in the alternative to typical prior art well-known techniques, as well as equivalent variations or modifications, mutually different combinations of features between features, for example 2-6 times the initial operation flux variations between different runs 0 flux. 8 - variation between 0.95 times the critical flux, or slightly exceeds this range slightly, like insubstantial changes can be equally applied, can achieve functions and effects described in this patent, not bore expand elaborate , belong to the scope of the present patent.

Claims (4)

  1. 1.自生动态膜组件快速及稳定运行方法,其特征在于动态膜形成初期采用运行通量的2-6倍通量实现3 - 5分钟快速成膜;动态膜形成后转入正常运行降低过流通量,保持通量0. 8 - 0. 95倍临界通量运行;气、水清洗采用底部曝气、逆向曝气和逆向进水联合间隙和/ 或脉冲式清洗。 1. Self fast and stable operation of the dynamic membrane, characterized in that the initial film is formed using the dynamic operating flux flux 2-6 times to achieve 3--5 minute quick deposition; transferred to normal operation after reducing the dynamic membrane is formed through the flow amount of flux to maintain 0.8 - 0.95 times the critical flux operation; gas, water washing using a bottom aeration, aeration reverse and reverse inlet joint gaps and / or pulse cleaning.
  2. 2.根据权利要求1所述自生动态膜组件快速及稳定运行方法,其特征在于临界通量由工作曲线法测定。 1 according to the self fast and stable operation of the dynamic membrane method as claimed in claim, characterized in that the critical flux measured by the working curve method.
  3. 3.根据权利要求1或2所述自生动态膜组件快速及稳定运行方法,其特征在于动态膜形成初期高通量是在膜组件上设置上下两个出水阀门,初期开启低位阀门形成大液位差实现成膜初期大通量。 1 or 2 according to the autogenous fast and stable operation of the dynamic membrane method as claimed in claim, wherein the level of dynamic membrane formation of large initial high throughput is provided in two upper and lower membrane module outlet valves, the low initial valve opening formed the difference between the initial film to achieve great flux.
  4. 4.根据权利要求3所述自生动态膜组件快速及稳定运行方法,其特征在于成膜正常运行关闭低位阀门,开启原正常阀门。 3 according to the dynamic self fast and stable operation of membrane method as claimed in claim, characterized in that the normal operation of the deposition and close the lower valve, the valve normally open primary.
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CN103638819A (en) * 2013-12-19 2014-03-19 北京林业大学 Method for cleaning external tubular membrane for deeply treating waste incineration leachate

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