WO2012055340A1

WO2012055340A1 - Microporous aerating speed-changing oxidation ditch

Info

Publication number: WO2012055340A1
Application number: PCT/CN2011/081165
Authority: WO
Inventors: 彭党聪; 韩芸
Original assignee: 西安建筑科技大学
Priority date: 2010-10-27
Filing date: 2011-10-24
Publication date: 2012-05-03
Also published as: CN101973626A; CN101973626B

Abstract

A microporous aerating speed-changing oxidation ditch comprises a ditch body (1), an anoxic zone (3) and an aerobic zone (4). The ditch body (1) has a water inlet (7), a sludge inlet (8) and a water outlet (9). A pusher (5) is provided in the anoxic zone (3) and an aerating device (6) is provided in the aerobic zone (4). The ditch body (1) is divided into the anoxic zone (3) and the aerobic zone (4) by clapboard (2) with different cross section areas. Wherein, the cross section area of the aerobic zone (4) is larger than that of the anoxic zone (3). Flow speed in the aerobic zone (4) is lower than that in the anoxic zone (3) due to continuity of water flow in the ditch. Thereby the microporous aerating speed-changing oxidation ditch is formed. The larger the depth (b) or width (h) of the aerobic zone (4) is, the larger the cross section area is and the smaller the flow speed in the aerobic zone (4) is. The larger the speed changing amplitude of the speed-changing oxidation ditch is, the smaller the number of the needed pusher (5) is and the lower the energy consumption is.

Description

孔曝气变速氧化沟 Hole aeration shift oxidation ditch

技术领域 Technical field

本发明涉及一种城市污水氧化沟处理方法，特别涉及一种微孔曝气变速氧化沟，用于旧有氧化沟的改扩建和新建。背景技术 The invention relates to a method for treating urban sewage oxidation ditch, in particular to a microporous aeration variable oxidation ditch, which is used for reconstruction and expansion of an old oxidation ditch. Background technique

氧化沟是城市污水处理的主要方法之一。现有的氧化沟为环形的沟渠，内设曝气和水流推进器。当混合液在推进器的推动下沿沟渠流动时，顺次经过曝气装备所在的区域和无曝气装备的区域，形成好氧区和缺氧区。污水和回流污泥进入氧化沟后，形成的混合液经过曝气区时，污泥中的微生物利用曝气设备送入的氧气将污水中的有机污染物好氧降解同时进行硝化 Oxidation ditch is one of the main methods of urban sewage treatment. The existing oxidation ditch is an annular ditch with an aeration and water flow propeller. When the mixed liquid flows along the ditch under the push of the propeller, the aerobic zone and the anoxic zone are formed by sequentially passing through the area where the aeration equipment is located and the area without the aeration equipment. After the sewage and return sludge enter the oxidation ditch, the formed mixture passes through the aeration zone, and the micro-organisms in the sludge use the oxygen sent from the aeration device to degrade the organic pollutants in the sewage while performing nitrification.

(将水中的氨氧化为 N0₃— )_; 当混合液经过缺氧区时，污泥中的微生物利用好氧阶段产生的 N0₃—进行反硝化，将污水中的有机物缺氧降解，同时将 N0₃— 还原为氮气。曝气装备有表面曝气和微孔曝气。表面曝气是通过叶轮或转刷的旋转产生散水作用，使空气中的氧溶解于水中；而微孔曝气是在水下设置各种形式的由刚玉、橡胶或其他材料制成的具有微孔结构的曝气头（或盘），当空气由鼓风机通过管道进入曝气头时，被切割分散为直径小于 1微米的小气泡，从而达到使空气中的氧快速高效地溶入水中的目的。采用微孔曝气的氧化沟称之为曝气氧化沟，为目前较为常用的氧化沟之一。 (oxidize ammonia in water to N0 ₃ —) _; when the mixture passes through the anoxic zone, the microorganisms in the sludge use the N0 ₃ produced in the aerobic stage to denitrify, decomposing the organic matter in the sewage by oxygen, and at the same time N0 ₃ - reduced to nitrogen. The aeration equipment has surface aeration and microporous aeration. Surface aeration is the effect of dispersing water through the rotation of the impeller or rotating brush to dissolve oxygen in the air; while microporous aeration is set in various forms of corundum, rubber or other materials under water. The aeration head (or disk) of the pore structure is cut and dispersed into small bubbles having a diameter of less than 1 micrometer when the air is blown into the aeration head through a pipe, thereby achieving the purpose of rapidly and efficiently dissolving oxygen in the air into the water. . The oxidation ditch using microporous aeration is called aeration oxidation ditch, which is one of the more commonly used oxidation ditch.

现有的各种氧化沟分为 DE氧化沟、 T性氧化沟、 Carousel氧化沟以及 Orbal氧化沟等。尽管各种氧化沟的沟渠结构形式不同，但同一氧化沟，沟渠内的缺氧区和好氧区宽度和深度均相同，因此，沟内混合液在缺氧区和好氧区的流速均相同（称之为等速氧化沟）。为了使沟内混合液中的污泥和水较好的混合、接触，完成相应的生物化学反应，氧化沟内的水流速度必须维持一定的流速（0. 3m/s以上），通过水流的挟带作用，使混合液中的污泥处于悬浮状态，达到混合接触的目的。否则，混合液中的污泥将会沉淀分离，这也是氧化沟必须设置推进器的原因所在。 The various oxidation ditches currently available are classified into DE oxidation ditch, T-oxidation ditch, Carousel oxidation ditch, and Orbal oxidation ditch. Although the ditch structure of each oxidation ditch is different, the width and depth of the anoxic zone and the aerobic zone in the ditch are the same in the same oxidation ditch. Therefore, the flow rate of the mixed liquid in the ditch is the same in the anoxic zone and the aerobic zone. (called the constant velocity oxidation ditch). In order to mix and contact the sludge and water in the mixture in the ditch, the corresponding biochemical reaction is completed, and the water flow rate in the oxidation ditch must be A certain flow rate (0.3 m/s or more) must be maintained, and the sludge in the mixed liquid is suspended in the suspension state by the action of the water flow, thereby achieving the purpose of mixing contact. Otherwise, the sludge in the mixture will precipitate and separate, which is why the oxidation ditch must be equipped with a propeller.

在曝气氧化沟中的好氧区，由于曝气的作用，已经形成了较好的混合效果，不需要像缺氧区那样，通过水流速度来达到混合的作用。因此，在等速氧化沟的好氧区形成了能量的浪费。发明内容 In the aerobic zone of the aeration oxidation ditch, a good mixing effect has been formed due to the action of aeration, and it is not necessary to achieve the mixing effect by the water flow velocity as in the anoxic zone. Therefore, a waste of energy is formed in the aerobic zone of the constant velocity oxidation ditch. Summary of the invention

为了克服现有的等速曝气氧化沟中好氧区流速过高（与缺氧区相同）带来的能量浪费，本发明的目的在于，提供一种微孔曝气变速氧化沟，该微孔曝气变速氧化沟通过改变现有的曝气氧化沟的同一沟渠内不同部位的宽度和深度，调节沟渠的断面面积，达到最终调节沟内不同部位的水流速度的效果，形成微孔曝气变速氧化沟。即在维持缺氧区断面的情况下，增加好氧区断面面积，使好氧区的流速大幅度降低，减少沟内水流流动所需的推动力，即大幅度减少推流器的设置数量，从而达到降低建设投资和运行费用的双重目的。 In order to overcome the energy waste caused by the excessive flow rate of the aerobic zone in the aerobic oxidation ditch (same as the anoxic zone), the present invention aims to provide a microporous aeration shifting oxidation ditch, the micro The hole aeration shifting oxidation ditch adjusts the cross-sectional area of the ditch by changing the width and depth of different parts in the same ditch of the existing aeration oxidation ditch, and finally achieves the effect of finally adjusting the water flow velocity in different parts of the ditch to form microporous aeration. Variable speed oxidation ditch. That is, in the case of maintaining the cross section of the anoxic zone, the cross-sectional area of the aerobic zone is increased, the flow velocity of the aerobic zone is greatly reduced, and the driving force required for the flow of the water in the ditch is reduced, that is, the number of the pusher is greatly reduced. Thereby achieving the dual purpose of reducing construction investment and operating costs.

为了实现上述任务，本发明采用的技术解决方案如下： In order to achieve the above tasks, the technical solution adopted by the present invention is as follows:

一种微孔曝气变速氧化沟，包括沟体、缺氧区和好氧区，沟体上有进水口和进泥口和出水口，缺氧区内有推进器，好氧区内有曝气装置，其特征在于，所述的沟体由隔板分割成断面面积不同的缺氧区和好氧区，其中，好氧区的断面面积大于缺氧区的断面面积。 A microporous aeration shifting oxidation ditch, comprising a groove body, an anoxic zone and an aerobic zone, a water inlet and a mud inlet and a water outlet on the groove body, a propeller in the anoxic zone, and an exposure in the aerobic zone The gas device is characterized in that the groove body is divided into an anoxic zone and an aerobic zone having different cross-sectional areas by a partition, wherein a cross-sectional area of the aerobic zone is larger than a sectional area of the anoxic zone.

由于水流在沟内的连续性原理，好氧区的流速就会小于缺氧区的流速，从而形成变速氧化沟。好氧区的宽或深越大，断面面积越大，好氧区的流速越小，变速氧化沟的变速幅度越大，所需的推进器数量就越少，能量消耗就越低。与现有的等速曝气氧化沟相比，本发明采用了不同的断面形式后，微孔曝气氧化沟好氧区的流速大幅度地减小，而氧化沟内的流速是依靠设置在沟内的推进装置产生的，流速越高，所需的推进器越多，消耗的电能也越多。因此，采用变速氧化沟，可在维持氧化沟固有的处理效果和处理能力的同时，大幅度地降低建设投资（购置和安装推进器的数量）和运行费用（电能）。附图说明 Due to the continuity of the water flow in the groove, the flow rate in the aerobic zone will be smaller than that in the anoxic zone, thereby forming a variable speed oxidation ditch. The greater the width or depth of the aerobic zone, the larger the cross-sectional area, the smaller the flow rate in the aerobic zone, and the greater the shifting amplitude of the shifting oxidation ditch, the less the number of thrusters required and the lower the energy consumption. Compared with the existing constant velocity aeration oxidation ditch, after the invention adopts different cross-section forms, the flow rate of the aerobic zone of the microporous aeration oxidation ditch is greatly reduced, and the flow velocity in the oxidation ditch is determined by The higher the flow rate produced by the propulsion unit in the trench, the more thrusters are required and the more power is consumed. Therefore, the use of variable-speed oxidation ditch can greatly reduce the construction investment (the number of propellers purchased and installed) and the operating cost (electric energy) while maintaining the inherent treatment effect and processing capacity of the oxidation ditch. DRAWINGS

图 1是微孔曝气等深变速氧化沟的构造图，其中（a) 是平面图，（b ) 是断面图； Figure 1 is a structural view of a microporous aeration isochronous oxidation ditch, wherein (a) is a plan view and (b) is a cross-sectional view;

图 2是微孔曝气等宽变速氧化沟的构造图，其中（a) 是平面图，（b ) 是断面图； Figure 2 is a structural view of a microporous aeration equal width shifting oxidation ditch, wherein (a) is a plan view and (b) is a sectional view;

图 3 是具有两级缺氧和好氧区的微孔曝气变速氧化沟的构造图，其中 (a) 是平面图，（b ) 是断面图。 Figure 3 is a structural view of a microporous aeration shifting oxidation ditch having a two-stage anoxic and aerobic zone, wherein (a) is a plan view and (b) is a cross-sectional view.

图中的标号分别表示： 1、沟体， 2、隔板， 3、缺氧区， 4、好氧区， 5、推进器， 6、曝气装置， 7、进水口， 8、进泥口， 9、出水口。图中的箭头表示水流方向，字母 b表示宽度，字母 h表示深度。 The figures in the figure indicate: 1, groove, 2, partition, 3, anoxic zone, 4, aerobic zone, 5, propeller, 6, aeration device, 7, water inlet, 8, mud inlet 9, the water outlet. The arrows in the figure indicate the direction of water flow, the letter b indicates the width, and the letter h indicates the depth.

下面结合附图和实施例对本发明作进一步的详细说明。具体实施方式 The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. detailed description

参见附图，本发明的微孔曝气变速氧化沟，包括沟体 1、缺氧区 3和好氧区 4，沟体 1上有进水口 7和进泥口 8和出水口 9，缺氧区 3内有推进器 5，好氧区 4内有曝气装置 6，沟体 1由隔板 2分割成断面面积不同的缺氧区 3和好氧区 4，其中，好氧区 4的断面面积大于缺氧区 3的断面面积。 Referring to the accompanying drawings, the microporous aeration shifting oxidation ditch of the present invention comprises a groove body 1, an anoxic zone 3 and an aerobic zone 4, and the groove body 1 has a water inlet port 7 and a mud inlet port 8 and a water outlet port 9, which are dehydrated. There is a propeller 5 in the zone 3, and an aeration device 6 in the aerobic zone 4, and the trench 1 is divided by the partition 2 into an anoxic zone 3 and an aerobic zone 4 having different cross-sectional areas, wherein the aerobic zone 4 has a section The area is larger than the sectional area of the anoxic zone 3.

本发明的微孔曝气变速氧化沟的工作原理是：当由二沉池回流的污泥和污水由进水口 7和进泥口 8—起进入沟体 1内的缺氧区 3，污泥和污水与缺氧区 3 的混合液即刻混合，污泥中的微生物利用进水中的有机物将沟内缺氧区 3产生的硝酸盐还原为氮气，有机物自身被氧化为二氧化碳；当混合液沿沟内经过好氧区 4时，污泥中的硝化菌利用好氧区 4曝气设备供给的氧气将氨氮氧化为硝酸盐，供下一个周期缺氧段使用，同时污泥中的异养菌将混合液中剩余的有机物利用氧氧化为二氧化碳。如此循环往复。污水中的有机物和氨氮等污染物得以去除，达到同时去除有机物和氨氮的目的。 The working principle of the microporous aeration shifting oxidation ditch of the present invention is: when the sludge is returned from the secondary settling tank And the sewage enters the anoxic zone 3 in the ditch body 1 from the water inlet 7 and the mud inlet port 8, and the mixture of the sludge and the sewage and the anoxic zone 3 is instantly mixed, and the microorganisms in the sludge utilize the organic matter in the influent water. The nitrate produced in the anoxic zone 3 in the ditch is reduced to nitrogen, and the organic matter itself is oxidized to carbon dioxide; when the mixed liquid passes through the aerobic zone 4 in the ditch, the nitrifying bacteria in the sludge are supplied by the aerobic zone 4 aeration device. The oxygen oxidizes the ammonia nitrogen to nitrate for use in the anoxic section of the next cycle, while the heterotrophic bacteria in the sludge oxidize the remaining organic matter in the mixture to carbon dioxide. This cycle. Contaminants such as organic matter and ammonia nitrogen in the sewage can be removed to achieve the purpose of simultaneously removing organic matter and ammonia nitrogen.

在上述技术方案中，好氧区 4与缺氧区 3可深度相同，宽度不同，以此形成等深微孔曝气深变速氧化沟（图 1，图中， h^h^ b^ ) ; 好氧区 4 与缺氧区 3可宽度相同，深度不同，以此形成等宽微孔曝气变速氧化沟（图 2，图中， bfb^ ^>=^)；好氧区 4与缺氧区 3可深度和宽度均不相同，以此形成变宽变深微孔曝气变速氧化沟；还可设计为多个串联或并联的好氧区 4和缺氧区 3 (图 3 )，形成组合微孔曝气变速氧化沟，以满足不同的设计要求。 In the above technical solution, the aerobic zone 4 and the anoxic zone 3 may have the same depth and different widths, thereby forming an isotonic microporous aeration deep shift oxidation ditch (Fig. 1, Fig., h^h^b^); The aerobic zone 4 and the anoxic zone 3 may have the same width and different depths, thereby forming an equal-width microporous aeration shifting oxidation ditch (Fig. 2, Fig., bfb^^>=^); aerobic zone 4 and hypoxia Zone 3 can be different in depth and width to form a widened and deepened microporous aeration shifting oxidation ditch; it can also be designed as a plurality of aerobic zones 4 and anoxic zones 3 (Fig. 3) connected in series or in parallel to form The microporous aeration shifting oxidation ditch is combined to meet different design requirements.

以下是发明人给出的实施例，需要说明的是，以下的实施例是一些较优的例子，主要目的在于更好地理解本发明，本发明不限于这些实施例。实施例 1： The following are examples of the invention given by the inventors. It is to be noted that the following examples are preferred examples, and the main purpose is to better understand the present invention, and the present invention is not limited to the embodiments. Example 1:

某中间试验厂采用现有的微孔曝气氧化沟法处理城市污水，氧化沟容积为 20m³，好氧区和缺氧区的容积比为 1 : 2，流速相同，均为 0. 3m/s，配置功率为 100W的推进器 2个。进入氧化沟处理***的城市污水 COD浓度为 200〜300mg/L，总氮 30〜40mg/L。处理后出水的 COD浓度为 20〜30mg/L，总氮 10〜15mg/L。 Intermediate pilot plant using a conventional microporous aeration oxidation ditch municipal wastewater treatment, oxidation ditch volume 20m ^3, volume ratio aerobic zone and anoxic zones is 1: 2, the same flow rate, are 0. 3m / s, 2 propellers with a power of 100W. The COD concentration of urban sewage entering the oxidation ditch treatment system is 200~300mg/L, and the total nitrogen is 30~40mg/L. The treated water has a COD concentration of 20 to 30 mg/L and a total nitrogen content of 10 to 15 mg/L.

采用本发明的等深微孔曝气变速氧化沟（图 1 )对其进行改造，好氧区 4和缺氧区 3的容积比为 1 : 2，缺氧区 3的流速仍维持在 0. 3m/s，而好氧区 4的流速减小为 0. lm/s , 推进器 5由两个减少为 1个。处理效果与改造前相同，达到了同时减少推进器数量和降低能耗的目的。 The heavier microporous aeration shifting oxidation ditch (Fig. 1) of the present invention is modified. The volume ratio of the aerobic zone 4 to the anoxic zone 3 is 1:2, and the flow rate of the anoxic zone 3 is maintained at 0. 3m/s, and aerobic The flow rate of zone 4 is reduced to 0. lm/s and the number of thrusters 5 is reduced from two to one. The treatment effect is the same as before the transformation, achieving the purpose of reducing the number of propellers and reducing energy consumption.

实施例 2： Example 2:

某污水处理厂设计采用二级微孔曝气氧化沟法处理城市污水，氧化沟容积为 4000m³，好氧区 4和缺氧区 3的容积比为 1 : 3，沟内好氧区和缺氧区的流速相同，均为 0. 3m/s , 配置功率为 10KW的推进器 4个。进入氧化沟处理***的城市污水 COD浓度为 200〜300mg/L，总氮 30〜40mg/L。处理后出水的 COD浓度为 20〜30mg/L，总氮 10〜15mg/L。 A sewage treatment plant is designed to treat urban sewage by a two-stage microporous aeration oxidation ditch method. The volume of the oxidation ditch is 4000m ³ , and the volume ratio of aerobic zone 4 to anoxic zone 3 is 1:3. The flow rate in the oxygen zone is the same, both are 0.3 m/s, and four propellers with a power of 10 kW are arranged. The COD concentration of urban sewage entering the oxidation ditch treatment system is 200~300mg/L, and the total nitrogen is 30~40mg/L. The treated water has a COD concentration of 20 to 30 mg/L and a total nitrogen content of 10 to 15 mg/L.

改为采用本发明的二级微孔曝气变速氧化沟（图 3 )，好氧区 4和缺氧区 3的容积比仍为 1 : 3，缺氧区 3的流速仍维持在 0. 3m/s , 而好氧区 4的流速减小为 0. 15 m/s , 推进器 5由 4个减少为 2个。处理效果与改造前相同，达到了同时减少推进器数量和降低能耗的目的。 3m。 The flow rate of the anoxic zone 3 is still maintained at 0. 3m, the flow rate of the anoxic zone 3 is still maintained at 0. 3m /s , and the flow rate of the aerobic zone 4 is reduced to 0.15 m/s, and the number of the propellers 5 is reduced from four to two. The treatment effect is the same as before the transformation, achieving the purpose of reducing the number of propellers and reducing energy consumption.

Claims

权利要求 Rights request

1、一种微孔曝气变速氧化沟，包括沟体（1)、缺氧区（3) 和好氧区 (4)，沟体（1)上有进水口（7)和进泥口（8)和出水口（9)，缺氧区（3) 内有推进器（5)，在好氧区（4) 内有曝气装置（6)，其特征在于，所述的沟体（1) 由隔板（2) 分割成断面面积不同的缺氧区（3) 和好氧区（4)，其中，好氧区（4) 的断面面积大于缺氧区（3) 的断面面积； 1. A microporous aeration shifting oxidation ditch comprising a channel body (1), an anoxic zone (3) and an aerobic zone (4), the channel body (1) having a water inlet (7) and a mud inlet ( 8) and the water outlet (9), the anoxic zone (3) has a propeller (5), and the aerobic zone (4) has an aeration device (6), characterized in that the groove body (1) The partition zone (2) is divided into an anoxic zone (3) and an aerobic zone (4) having different cross-sectional areas, wherein the aerobic zone (4) has a cross-sectional area larger than that of the anoxic zone (3);

所述的缺氧区（3) 和好氧区（4) 的断面面积为：深度相同，宽度不同，形成等深变速氧化沟；或者 The cross-sectional area of the anoxic zone (3) and the aerobic zone (4) are: the same depth and different widths, forming a constant-speed shifting oxidation ditch;

所述的缺氧区（3) 和好氧区（4) 的断面面积为：宽度相同，深度不同，形成等宽变速氧化沟；或者 The cross-sectional area of the anoxic zone (3) and the aerobic zone (4) are: the same width and different depths, forming an equal-width shifting oxidation ditch;

所述的缺氧区（3) 和好氧区（4) 的断面面积为：深度和宽度均不相同，形成变宽变深变速氧化沟。 The cross-sectional area of the anoxic zone (3) and the aerobic zone (4) is: the depth and the width are different, and a variable width and deepening shifting oxidation ditch is formed.

2、如权利要求 1所述的微孔曝气变速氧化沟，其特征在于，所述的缺氧区（3) 和好氧区（4) 由多级串联或并联组成，形成组合变速氧化沟。 2. The microporous aeration shifting oxidation ditch according to claim 1, wherein the anoxic zone (3) and the aerobic zone (4) are composed of multiple stages in series or in parallel to form a combined shifting oxidation ditch. .