KR102197595B1 - Multi-unit improved continuous batch reactor and its application - Google Patents

Abstract

The present invention provides a multi-unit improved continuous batch reactor, which includes an anaerobic reaction unit, a first anoxic reaction unit, a sludge water separation unit, an aerobic unit, a first continuous batch unit and a second continuous batch unit, and a total anoxic unit , A second anoxic reaction unit, a first anoxic/aerobic reaction unit and a second anoxic/aerobic reaction unit. The improved continuous batch reactor can sufficiently utilize the carbon source of raw water to improve the total nitrogen removal rate, and is particularly suitable for sewage treatment with a relatively low carbon nitrogen ratio, but can be used for wastewater treatment with a relatively high carbon nitrogen ratio.

Description

Multi-unit improved continuous batch reactor and its application

The present invention pertains to the field of sewage treatment technology, and specifically, the present invention relates to a multi-unit (especially 10 unit) improved continuous batch reactor and its application in the treatment of sewage (especially the sewage in the southern province of China).

The inventors of the present invention 20 years ago, including functions such as anaerobic / anoxic, aerobic, continuous batch reaction, precipitation and discharge, and an improved type advantageous for integration in the form of a single tank multi-treatment chamber (abbreviated as 1 reactor multi-chamber or 1 reactor multi-unit) The first continuous batch reactor was invented (see Chinese patent ZL97196312.6). A typical one reactor five-chamber improved continuous batch reactor includes an anaerobic reaction unit, a separation unit, a main aeration (exhalation) unit and two sequencing treatment (continuous batches) units, one of which is continuous. The batch unit is precipitated and discharged, and the other continuous batch unit is subjected to five stages of wastewater circulation treatment with the other unit to remove phosphorus and nitrogen. However, the reactor has a relatively complicated pipeline outside a single tank body. Accordingly, the inventors of the present invention include an anaerobic reaction unit, an oxygen-free reaction unit, a separation unit, a main aeration unit, and two consecutive batch units, one of which in the course of the half operation cycle, one of the continuous batch units is pitted and discharged, and the other As for the batch unit, an improved continuous batch reactor of 6 chambers in 1 reaction tank was designed to go through 3 steps including oxygen-free mixing, aerobic aeration and pre-preciptation.

The improved continuous batch reactor has already been practically applied in North America, has a good operating effect, and has generally maintained the above device structure for many years. Although practically applied relatively early in China, the inventors of the present invention believe that such a continuous batch reactor has a good operating effect in the northern regions of China, but it is relatively difficult to operate in the southern regions of China, and the quality of treated sewage is difficult to meet the standard, and even each It was found that even if the operating parameters of the step were thoroughly adjusted, there were cases where it was not resolved smoothly.

Accordingly, the inventor of the present invention has conducted extensive research, and through decades of honed and polished experience in the field, a number of interference factors, such as the most easily conceivable effect of temperature and environmental microbes, have been excluded, Finally, it was found that the main cause of the above problem was the relatively low carbon nitrogen ratio of wastewater in southern China. After finding the problem, the present inventors have sufficiently inspected the improved continuous batch reactor to almost give up the structure of the device and separately tried to design a sewage treatment device specially for wastewater with a relatively low carbon nitrogen ratio in the southern region of China. In particular, with some luck (one reaction tank), he invented an improved 10 unit continuous batch reactor. The 10-unit improved continuous batch reactor (1 reactor) greatly improves the dephosphorylation effect of the system by sufficiently utilizing the carbon source of raw water, and in particular, the total nitrogen removal rate is improved, so that there is no need to add or excessively inject drugs. Without it, the above problem can be effectively solved. In addition, the improved continuous batch reactor of 10 units (1 reaction tank) has good water quality adaptability and can effectively treat wastewater with a relatively low carbon nitrogen ratio, and is an 8 unit improved continuous batch reactor as a conventional improved continuous batch reactor. It is possible to treat wastewater with a relatively high carbon nitrogen ratio by replacing the with high efficiency, thus providing an effective means to the state's latest wastewater treatment standard. Also, the production line of the original one-reaction tank multichamber device can be used continuously, reducing upgrade costs. You can save.

The technical problem to be solved by the present invention is to provide a novel improved continuous batch reactor suitable for wastewater treatment with a relatively low carbon nitrogen ratio, and preferably with good adaptability to the water quality. In addition, the present invention correspondingly provides a method for treating raw water containing organic matter.

Specifically, the present invention provides, as a first aspect, an improved continuous batch reactor, which is an anaerobic reaction unit 4, a first anoxic reaction unit 5, a sludge water separation unit 2, Including the exhalation unit 6, the first continuous batching unit 1 and the second continuous batching unit 7, the pre-anoxic unit 3, the second anoxic reaction unit 5A, the first Further comprising an anoxic/aerobic reaction unit (1A) and a second anoxic/aerobic reaction unit (7A); Among them, the anaerobic reaction unit 4 receives raw water, receives the bottom sediment from the total anoxic unit 3, and can react its contents under anaerobic conditions;

The first anoxic reaction unit 5 can receive the supernatant from the sludge water separation unit 2, receive the treatment liquid from the anaerobic reaction unit 4, and react the contents of the liquid under oxygen-free conditions;

The second anoxic reaction unit 5A accommodates the supernatant from the sludge water separation unit 2, receives the treatment liquid from the first anoxic reaction unit 5, and can react the contents of the liquid under anoxic conditions. ;

The aerobic unit 6 can receive the supernatant from the sludge water separation unit 2, receive the treatment liquid from the second anoxic reaction unit 5A, and react the contents of the liquid under aeration conditions;

The first anoxic/aerobic reaction unit 1A accommodates the treatment liquid classified in the anaerobic reaction unit 4, receives the treatment liquid from the aerobic unit 6, and causes the contents to react under oxygen-free or aerobic conditions. Can;

The first continuous batching unit 1 receives the supernatant from the sludge water separation unit 2, receives the treatment liquid from the first anoxic/aerobic reaction unit 1A, and stores the contents without oxygen or aeration or standing. Can react or precipitate out under (standing) conditions;

The second anoxic/aerobic reaction unit 7A accommodates the treatment liquid classified from the anaerobic reaction unit 4, receives the treatment liquid from the aerobic unit 6, and reacts the contents of the liquid under oxygen-free or aerated conditions. Can;

The second continuous batching unit 7 receives the supernatant from the sludge water separation unit 2, receives the treatment liquid from the second anoxic/aerobic reaction unit 1A, and stores the contents without oxygen or aeration or standing. Can react under conditions or precipitate out;

The sludge water separation unit 2 accommodates the treatment liquid and/or the precipitated Journey from the first continuous batching unit 1 and the second continuous batching unit 7, and the supernatant and/or the treatment liquid and/or the precipitated Journey. Journey can be separated; And,

The total anoxic unit 3 accommodates the sediment from the sludge water separation unit 2, and can react the sediment under oxygen-free conditions.

Preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, the anaerobic reaction unit 4, the first anoxic reaction unit 5, the first continuous batching unit 1, the second continuous batching unit 7, A stirring device is provided in the total anoxic unit 3, the second anoxic reaction unit 5A, the first anoxic/aerobic reaction unit 1A, and the second anoxic/aerobic reaction unit 7A.

Preferably, in the improved continuous batch reactor of the first aspect of the original name, the exhalation unit 6, the first continuous batch unit 1, the second continuous batch unit 7, the first anoxic/aerobic reaction unit 1A and the first 2 An aeration device is provided in the oxygen-free/exhalation reaction unit 7A.

Preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, the first continuous batch unit 1 and the second continuous batch unit 7 are provided with a discharge device for discharging the Journey to the outside of the improved continuous batch reactor.

Preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, when one of the first continuous batch unit 1 and the second continuous batch unit 7 reacts the contents of the liquid under oxygen-free or aerated or stationary conditions , The other is discharged by sedimenting the contents. For example, when one of the first continuous batching unit 1 and the second continuous batching unit 7 reacts its contents sequentially under oxygen-free, aerated, and stationary conditions, the other is to precipitate the contents. Discharge.

Preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, the first anoxic/aerobic reaction unit 1A and the second anoxic/aerobic reaction unit 7A contain a carbon source from the outside of the improved continuous batch reactor. The device is provided.

Preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, the first oxygen-free reaction unit 5 can receive the treatment liquid from the aerobic unit 6.

Preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, the first anoxic/aerobic reaction unit 1A and the second anoxic/aerobic reaction unit 7A may react the contents of the liquid under anoxic conditions, The inner solution can also be reacted under aeration conditions. In addition, preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, the first anoxic/aerobic reaction unit 1A and the second anoxic/aerobic reaction unit 7A can react the liquid content only under anoxic conditions. have.

Preferably, the improved continuous batch reactor, which is the first aspect of the present invention, has a 10 unit structure of one reactor.

Preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, fillers in the anaerobic reaction unit 4, the first anoxic reaction unit 5, the second anoxic reaction unit 5A and/or the aerobic unit 6 Is included.

In the second aspect of the present invention, the present invention provides a method for treating raw water containing organic matter, which

(1) mixing raw water with a stirrer and reacting under anaerobic conditions;

(2) reacting the treatment liquid obtained in step (1) under oxygen-free conditions;

(3) reacting the treatment liquid obtained in step (2) under oxygen-free conditions;

(4) reacting the treatment liquid obtained in step (3) under aeration conditions;

(5) optionally mixing the treatment liquid obtained in step (4) with the treatment liquid obtained in step (1), and reacting under anoxic conditions;

(6) reacting the treatment liquid obtained in step (5) under oxygen-free conditions;

(7) reacting the treatment liquid obtained in step (6) under aeration conditions;

(8) settling the treatment liquid obtained in step (7) to precipitate; And

(9) precipitating and discharging the treatment liquid obtained in step (8),

Among them, by taking a part of the treatment liquid in step (6) and/or step (7) and/or taking the partially precipitated Journey in step (8) to separate and obtain the supernatant and the Journey, among which the Journey is selectively anaerobic After reacting under conditions, it is recycled in step (1).

Preferably, the method of the second aspect of the present invention is carried out through the improved continuous batch reactor of the first aspect of the present invention, of which one of the first continuous batch unit 1 and the second continuous batch unit 7 is When performing steps (6), (7) and (8), the other performs step (9).

Preferably, in the method of the second aspect of the present invention, the separately obtained supernatant is circulated into the treatment liquid of steps (2), (3), (4), (6) and/or step (7).

Advantageous effects of the present invention are as follows. The improved continuous batch reactor of the present invention performs dephosphorylation of sewage, and in particular, compared to the conventional improved continuous batch reactor, the total nitrogen removal rate can be improved by about 25%, and the carbon source of raw water can be sufficiently used, so that carbon nitrogen consumption is reduced. It is particularly suitable for relatively low wastewater, and can effectively reduce the cost of separate carbon source drugs during operation. In addition, the improved continuous batch reactor of the present invention has sufficient usability, and not only can completely replace the functions of the conventional improved continuous batch reactor, but also can use the original production line, materials, and members, so that upgrades are possible. It is convenient.

For convenience of understanding, the present invention will be described in detail through the following specific drawings and examples. These descriptions are merely illustrative and do not limit the scope of the present invention, and many changes and modifications of the present invention based on the contents of the present specification will be apparent to those skilled in the art. In addition, the present invention has cited public documents, and these documents are intended to more clearly describe the present invention, and the entire contents of these documents are all included in the text for reference, as already duplicated in the text.

1 shows an arrangement and a connection type of each unit in a 10-unit improved continuous batch reactor of the present invention, in which the arrow direction indicates the flow direction of raw water, the treatment liquid or the Journey; Fig. 1A and Fig. 1B show the flow directions of two continuous batch units running at the same time, respectively, of which a completely blocked pipeline is omitted.
FIG. 2 shows a situation in which each unit of the 10-unit improved continuous batch reactor of the present invention is distributed in a structure integrated into a single tank body (1 reactor).

The first aspect of the present invention provides an improved continuous batch reactor, which is an anaerobic reaction unit, a first anoxic reaction unit, a sludge separation unit, an aerobic unit, a first continuous batch unit, a second continuous batch unit, a total anoxic unit, and It includes 2 anoxic reaction units, a first anoxic/aerobic reaction unit and a second anoxic/aerobic reaction unit.

In the text, the improved continuous batch reactor is also referred to as the advanced sequencing batch reactor, which includes at least two continuous batch units. In the first half of one typical operating cycle, the raw water flows in sequence through the anaerobic reaction unit, the first anoxic reaction unit, the aerobic unit, the first anoxic/aerobic reaction unit and the first continuous batching unit, and then to the sludge water separation unit. It is introduced and separated into a supernatant and a sediment, of which the sediment is transferred to an anaerobic reaction unit through a total anoxic unit, and the supernatant is distributed to a first anoxic reaction unit, a second anoxic reaction unit, an aerobic unit, or a continuous batch unit depending on water quality. And the contents of the first continuous batching unit are sequentially reacted under oxygen-free, aerated and stationary conditions; At the same time, precipitation is discharged from the second continuous batching unit. In the second half of the operation cycle, the first anoxic/exhaled reaction unit, the first continuous batch unit, the second anoxic/exhaled reaction unit, and the second continuous batch unit are exchanged so that the process is repeated in a mirror image. As the operation cycle is circulated, raw water is treated continuously. Of course, depending on the water quality and treatment requirements, the contents in the first (2) continuous batch unit may undergo multi-stage anoxic and aeration reactions in the previous (post) half section of one operating cycle, that is, the oxygen-free and aeration conditions. After repeatedly reacting under two, three or more times, the reaction may be carried out again under stationary conditions, for example, in order, the reaction may be carried out under anoxic, aeration, anoxic, aeration and preposition conditions.

In the text, a unit refers to a chamber, a reaction tank (ie, an open type reaction tank) or a tank that can independently perform its function. For example, oxygen-free (reaction) refers to reacting the contents of the unit to which it is not in contact with air other than the atmosphere, for example, without performing aeration, and reacting the contents of the unit to be oxygen-free inside. Examples include denitrification reactions of denitrifying bacteria) to nitrate roots, and fatty acid absorption and phosphate root release reactions of phosphorus-rich bacteria (e.g., Acinetobacter and Aeromonas). . The oxygen-free (reaction) unit may be a reactor that does not have an aeration function, and is preferably a generally sealed chamber or tank. The anaerobic reaction unit has substantially the same structure as the anoxic reaction unit, but in addition to having a function of not contacting (for example, not performing aeration) other air other than the atmosphere, inflow of a treatment liquid containing nitrate Prevent more as possible. In addition, the exhalation (reaction) unit is a chamber, reaction tank, or tank having a function of introducing separate air or oxygen (usually having an aeration function), in which the content liquid proceeds an aerobic reaction, and nitrifying bacteria (e.g. For example, the nitration reaction of nitrosomonas and nitromonas), and the absorption reaction of a higher amount of phosphorus-rich bacteria to the phosphate roots, and the like.

Microorganisms participating in anoxic and aerobic reactions are usually present in the sludge of sewage and are gradually increased and stabilized as the anoxic and aerobic environment is maintained, and are sufficient to complete the anoxic and aerobic reactions of the corresponding units, and generally There is no need to add separately. In the text, the exemplary operation of the improved continuous batch reactor is not an extreme situation in which microorganisms are insufficient at the beginning of the device input, but refers to the operation when microorganisms react stably.

In the text, the sludge water separating unit is also referred to as a separating unit, and in general, the paddle and the supernatant are separated by gravity, and the paddle can be transferred to the oxygen-free unit through a pipeline. However, in the present invention, it is preferable that the sludge water separation unit and the total anoxic unit are adjacent to each other to have a hollow plate wall, and the bottom of the hollow plate wall is communicated. It is preferable that the bottom portion is inclined from the sludge water separation unit toward the total anoxic unit. It is preferable that the sludge water separation unit is installed at a relatively high position, and if the height of the top is higher than that of other units, the pipeline extending from the top or higher than the other units can directly distribute the supernatant using the height difference. So you don't need a pump. The height of other units can be matched.

In the text, the continuous batch unit refers to a chamber, reactor or tank body with the ability to carry out different reactions (e.g., anoxic and aerobic reactions) in different time intervals, preferably while being a generally sealed chamber or tank body. An aeration device is provided therein to perform an aerobic reaction during aeration and an anoxic reaction when the aeration is stopped. The anoxic/aerobic reaction unit is generally similar to a generally enclosed chamber, reaction vessel or tank of a continuous batch unit and preferably has an aeration system, provided that only one function of an anoxic (reaction) unit and an aerobic (reaction) unit is provided. It could also be an executable unit. For example, the oxygen-free/aerobic reaction unit is only one oxygen-free (reaction) unit, and is sufficient to realize effective treatment of wastewater having a relatively low carbon nitrogen consumption even without an aeration function. In addition, if the anoxic/exhaled reaction unit is only one exhalation (reaction) unit, it can be regarded as a derivative or expansion of the exhalation unit, and theoretically, it corresponds to operating in the manner of an 8 unit improved continuous batch reactor. In the application, it is possible to more effectively replace the conventional improved continuous batch reactor of 6 chambers in one reactor, which is sufficient to realize effective treatment of wastewater having high carbon nitrogen consumption.

In the present invention, the reception of liquid or sludge is implemented through a pipeline or pipe inlet. Among them, the pipeline is typically for transfer between two separate units, and the pipe inlet is for transfer between two adjacent (ie common slab) units. Valves can be installed at both the pipeline and the pipe inlet to facilitate opening and closing and controlling the flow rate. A pump for raising the liquid or sludge or increasing the conveying speed may be installed in the pipeline, and the pump may be one capable of adjusting the output, and it is preferable that the flow rate can be adjusted by, for example, a converter. .

In the text, raw water in a narrow sense refers to sewage containing organic matter (for example, municipal sewage), that is, wastewater that avoids the appearance of extremely high mixed solution suspended solids concentration (MLSS) through initial purification or filtration. The typical concentration of MLSS in raw water is 2000 to 4500 mg/L, preferably 2500 to 3500 mg/L, and more preferably 3000 to 4000 mg/L. As described above, in addition to the total anoxic unit and the sludge water separation unit, the typical concentration of the treatment liquid in each unit of the improved continuous batch reactor of the present invention is also usually 2000 to 4500 mg/L, preferably 2500 to 3500 mg/L, more Preferably it is 3000 to 4000 mg/L.

In the text, the first and the second are merely to distinguish units having the same or similar structure or function, and do not limit the structure or function of the corresponding unit itself. For example, in the present invention, two oxygen-free reaction units, i.e., a first anoxic reaction unit and a second anoxic reaction unit, are installed in series, and they may have the same structure, and both implement the function of anoxic reaction of the contents. . Through research, the present inventors have found that in the case of sewage with low carbon nitrogen consumption, it is necessary to install two oxygen-free reaction units connected in series after the anaerobic reaction unit in the improved continuous batch reactor. Relatively large amounts of organic carbon remaining from being consumed only through the anaerobic reaction unit in the raw water are denitrified in the first oxygen-free reaction unit and the supernatant and/or treatment liquid containing a high concentration of nitrate radicals distributed and/or refluxed, and the reaction can be maintained at a relatively high rate. And then the relatively little contained organic carbon is received and/or distributed and then denitrified in the second oxygen-free reaction unit with the nitrate of the highest concentration, and the reaction rate is correspondingly relatively low. Therefore, the two oxygen-free reaction units connected in series not only can alleviate the short-circuiting phenomenon in the reaction tank, but also sufficiently utilize the finite organic carbon source in the raw water to reduce the organic carbon source until oxidative decomposition in the aerobic unit. , The denitrification reaction efficiency can be improved.

Preferably, in the improved continuous batch reactor, which is the first aspect of the present invention, the first anoxic reaction unit is capable of receiving a treatment liquid from the aerobic unit. In this way, sufficient nitrate is refluxed to cause a reaction residence time maintained for a long time, and the nitrate is too low, so that the phosphate accumulating bacteria are released without being adsorbed in the anoxic reaction tank, thereby preventing a phenomenon that affects the phosphorus removal effect.

Although the anaerobic / anoxic reaction can be carried out even in a stationary state, in the present invention, it is preferable to increase the corresponding reaction efficiency by providing a stirring device in a unit capable of performing an anaerobic / anoxic reaction function. For example, an anaerobic reaction unit, a first anoxic reaction unit, a first continuous batch unit, a second continuous batch unit, a total anoxic unit, a second anoxic reaction unit, a first anoxic/aerobic reaction unit and a second anoxic/aerobic reaction The unit is equipped with a stirring device. In addition, units capable of performing an aerobic reaction function, for example, an aeration unit, a first continuous batch unit, a second continuous batch unit, the first anoxic/aerobic reaction unit and the second anoxic/exhaled reaction unit are equipped with an aeration device. do.

The continuous batch unit is provided with a discharge device for discharging the sediment out of the improved continuous batch reactor, for example a pipeline or pipe inlet equipped with a sludge pump to prevent excessive sedimentation of the sediment. In the case of sediment discharge, the continuous ash unit may be provided with a decanter for discharging treated water, but it is preferable that an air outflow weir for discharging treated water is installed. For example, a flow guide plate is installed at the bottom of the continuous batch unit, and when the sediment is discharged, the treated water is filtered and purified through a paddle, and then again discharged through the air outlet weir installed at the top, thereby improving the water quality one step further. When one continuous batch unit performs precipitation and discharge, the other continuous batch unit sequentially reacts under oxygen-free, aeration, and stationary conditions, of which the oxygen-free reaction operates the stirring device but does not operate the aeration device. The aeration reaction is carried out in the situation where the aeration device is operated, and the stationary reaction is carried out in the situation where the stirring device and the aeration device are not operated. The sludge water separation unit is communicated with the continuous batching unit through a pipeline equipped with a pump, and is preferably communicated with the bottom or the bottom of the continuous batching unit to receive the treatment liquid and/or the settled Journey from the continuous batching unit. In general, when oxygen-free and aeration, what is accommodated is a treatment liquid, and when standing, what is received is a precipitated basin, and the sludge content is much higher than that of the treatment liquid, so it is easy to recover microorganisms therein.

In order to prevent sewage with extremely low carbon nitrogen consumption, the improved continuous batch reactor according to the first aspect of the present invention may further include a separate carbon source receiving device. Although the present inventor believes that any unit capable of performing an anaerobic / anoxic reaction function can accommodate a separate carbon source, but after testing, the present inventor found that it is more beneficial to install it in an anoxic / aerobic reaction unit. I found it.

In the present invention, a filler may be included so that microorganisms are attached to each unit to facilitate growth. The filler may be of irregular shape, spherical or cubic shape. Typically, the filler is made of sponge or polyurethane. A preferred filler is a porous filler, which is suitable for growth by attaching microorganisms at different positions on the surface and at different depths. Although a filler may be provided for each unit, the inventors of the present invention have studied the anaerobic reaction unit, the first anoxic reaction unit, the second anoxic reaction unit, and the aerobic unit, which are particularly beneficial when the filler is included, especially when the water temperature is low. Other units may not contain fillers (e.g., in winter in the Yangtze River basin in China), because it helps to maintain the high efficiency of biological treatment, and adding fillers to other units will offset the advantages and disadvantages. In the present invention, it is preferable that a filler is included in the anaerobic reaction unit, the first anoxic reaction unit, the second anoxic reaction unit and/or the aerobic unit, and the diameter or the length of the longest side of the filler can be stably maintained in the corresponding unit. It is more preferable to be larger than the mesh pore diameter on the pipe inlet or the pipeline connecting the corresponding units so that.

It is preferable that the improved continuous batch reactor of the first aspect of the present invention has an integrated single tank body, for example, a 10 unit structure of one reactor. The preferred distribution structure of each unit is as shown in FIG. 2. One end of the preferred single tank body is divided into three rows, the middle of which sequentially comprises a total anoxic unit, a sludge water separation unit, an anaerobic reaction unit, a first anoxic reaction unit and a second anoxic reaction unit; One side of the middle sequentially comprises a first continuous batch unit and a first anoxic/aerobic reaction unit; The other side sequentially comprises a second continuous batch unit and a second anoxic/aerobic reaction unit; An aerobic unit is installed at the other end, and the first anoxic/aerobic reaction unit, the second anoxic reaction unit, and the second anoxic/aerobic reaction unit are adjacent to each other. Units adjacent to each other are preferably in close contact, such as, for example, sharing a plate wall, and when connection is required, the units adjacent to each other can be communicated through a pipe inlet on the common plate wall.

Since the insufficient volume can be compensated for through the reaction in one unit of the raw water/treatment liquid and the extension of the residence time, studies on the volume of each unit are relatively rare in the prior art. As a result of the research, the present inventors have found that in the case of wastewater in the southern region of China, in particular, wastewater with a relatively low carbon nitrogen consumption, the first aspect of the present invention is the total anoxic unit in the improved continuous batch reactor, the sludge water separation unit, the anaerobic reaction unit, and the first oxygen free. The volume of the reaction unit, the second anoxic reaction unit, the aerobic unit, the first continuous batch unit, the first anoxic/aerobic reaction unit (1A), the second continuous batching unit and the second anoxic/aerobic reaction unit is small and small, respectively, It has been found that medium, medium, medium, maximum, large, medium, large and medium are preferable, and such a volume ratio can perform biological treatment with maximum efficiency. For clarity, quantitative total anoxic unit, sludge water separation unit, anaerobic reaction unit, first anoxic reaction unit, second anoxic reaction unit, aerobic unit, first continuous ash unit, first anoxic/aerobic reaction unit (1A) , The volume ratio of the second continuous batching unit and the second anoxic/aerobic reaction unit is 0.2 to 0.8: 0.2 to 0.8: 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.5: 2 to 8: 1.5 to 4.5: 0.5 to 1.5: 1.5 to 4.5: may be 0.5 to 1.5, preferably 0.3 to 0.7: 0.3 to 0.7: 0.8 to 1.2: 0.8 to 1.2: 0.8 to 1.2: 3 to 7: 2.5 to 3.5: 0.8 to 1.2: 2.5 to 3.5: It is 0.8-1.2, More preferably, it is 0.4-0.6:0.4-0.6:0.9-1.1:0.9-1.1:0.9-1.1:4-6:2.8-3.2:0.9-1.1:2.8-3.2:0.9-1.1.

The second aspect of the present invention provides a method for treating raw water containing organic matter, and is preferably carried out through an improved continuous batch reactor of the first aspect of the present invention.

The method of the second aspect of the present invention includes the following steps.

(1) Mixing raw water with a stirrer and reacting under anaerobic conditions, the step is preferably carried out in an anaerobic reaction unit.

(2) The step of reacting the treatment liquid obtained in step (1) under oxygen-free conditions, and the step is preferably carried out in a first oxygen-free reaction unit.

(3) A step of reacting the treatment liquid obtained in step (2) under an oxygen-free condition, and the step is preferably carried out in a second oxygen-free reaction unit.

(4) The step of reacting the treatment liquid obtained in step (3) under an aeration condition, and the step is preferably carried out in an aerobic unit.

(5) After mixing the treatment liquid obtained in step (4) with the treatment liquid obtained in step (1), optionally reacting under anoxic conditions, preferably an anoxic/aerobic reaction unit (especially the first anoxic/ An aerobic reaction unit).

(6) A step of reacting the treatment liquid obtained in step (5) under oxygen-free conditions, preferably in a continuous batch unit (especially the first continuous batch unit).

(7) The step of reacting the treatment liquid obtained in step (6) under aeration conditions, the step is preferably carried out in a continuous batch unit (especially the first continuous batch unit).

(8) A step of allowing the treatment liquid obtained in step (7) to be settled and settled, and the step is preferably carried out in a continuous batching unit (especially the first continuous batching unit).

(9) Precipitating the treatment liquid obtained in step (8) to discharge the treatment liquid, which is preferably carried out in a continuous batching unit (especially the first continuous batching unit).

Among them, taking some treatment liquid during step (6) and/or step (7) and/or taking some precipitated Journey in step (8) (preferably in the sludge water separation unit) to separate the supernatant and the Journey. Separation is obtained, of which the Journey is selectively reacted under anaerobic conditions (preferably in an anoxic unit) and then recycled in step (1).

In the text,'optionally' has a dictionary meaning, which refers to a relationship between'or' that is selective and non-selective. For example, in step (5), the treatment liquid obtained in step (4) is directly reacted under anoxic conditions and is not mixed with the treatment liquid obtained in step (1) (the treatment liquid obtained in step (1) is Not received), or the treatment liquid obtained in step (4) (also receiving the treatment liquid obtained in step (1)) with the treatment liquid obtained in step (1), and then reacted under anoxic conditions . In addition, after separating and obtaining the supernatant and the Journey, the Journey is directly circulated in step (1) (do not perform an anaerobic reaction first), or the Journey is reacted under anaerobic conditions and then circulated in Step (1). .

The first anoxic/aerobic reaction unit, the first continuous batching unit and the second anoxic/aerobic reaction unit, and the second continuous batching unit exchange the above steps, and thus can be circulated. Of any one cycle in the cycle, when one of the first continuous batching unit and the second continuous batching unit executes steps (6), (7) and (8), the other executes step (9).

Separatedly obtained supernatant can be added to the treatment liquid of step (9) to precipitate and discharge if the water quality is passed, and in many other cases, steps (2), (3), (4), (6) and/or Additional treatment including the step of circulating the treatment liquid of step (7) can be performed.

In the present invention, also preferably in step (4), some treatment liquid is taken and added to the treatment liquid in step (2) and reacted under oxygen-free conditions, and after this situation appears, in step (5), a separate carbon source Under this charged situation, the treatment liquid obtained in step (4) is not selectively mixed with raw water, but is reacted under oxygen-free conditions.

Hereinafter, it will be described with specific examples, and materials and members among them are all obtainable through market channels.

Example 1: Single tank type 10 unit improved continuous batch reactor

An exemplary distribution structure of the integrated tank body of the 10-unit improved continuous batch reactor of the present invention is as shown in FIG. 2, of which each unit has a chamber structure, and the pipeline between the pipes and the pipe inlet connection type are shown in FIG. As shown in.

The middle of the single tank body sequentially includes a total anoxic unit (3), a sludge water separation unit (2), an anaerobic reaction unit (4), a first anoxic reaction unit (5) and a second anoxic reaction unit (5A), Among them, the bottom of the sludge water separation unit 2 is obliquely communicated in the direction of the total anoxic unit 3 so that the sediment in the sludge water separation unit 2 is precipitated in the total anoxic unit 3; The anaerobic reaction unit 4 communicates with an external pipeline so that raw water can be introduced, and the anaerobic reaction unit 4 and the first anoxic reaction unit 5 communicate through a pipe inlet on a common plate wall; The sludge water separation unit 2 and the anaerobic reaction unit 4 do not communicate with each other even if they have a common plate wall; The total anoxic unit 3 communicates with the anaerobic reaction unit 4 through a pipeline equipped with a sludge pump to transfer the Journey in the total anoxic unit 3 to the anaerobic reaction unit 4; All anoxic unit (3), anaerobic reaction unit (4), first anoxic reaction unit (5) and second anoxic reaction unit (5A) are not installed in an open type, and are advantageous for carrying out anaerobic or anaerobic reactions. A stirring device is installed to sufficiently mix the content solution so that it is.

A first continuous batching unit (1) and a first anoxic/aerobic reaction unit (1A) are included in order on one side of the single tank body, of which the first continuous batching unit (1) and the first anoxic/aerobic reaction The unit 1A communicates through a pipe inlet on the common panel wall; An air outlet weir is installed in the first continuous batching unit 1, and a pipeline communicating with the outside of the single tank body is mounted at the outlet of the air outlet weir to facilitate the discharge of passed treated water, and It is further communicated with the outside of the single tank body through a pipeline equipped with a sludge pump so as to be easily discharged when the bottom is excessively precipitated; The first anoxic/aerobic reaction unit 1A is connected to or near an external pipeline on the anaerobic reaction unit 4 via a pipeline optionally equipped with a pump to facilitate receiving the fractionated raw water; The first oxygen-free/exhalation reaction unit 1A is further provided with a skylight that can be opened and closed so that it is not only easy to observe the sample to be collected, as well as to inject a chemical such as a carbon source into the interior when necessary; Both the first continuous batching unit 1 and the first oxygen-free/aerobic reaction unit 1A are not installed in an open type, and both are provided with a stirring device and an aeration device to operate the stirring device but not the aeration device. Operations such as anoxic reaction state, an aerobic reaction state in which the aeration device is operated, a stationary reaction in which the stirring device and the aeration device are blocked, or the precipitation discharge state can be performed. In the case of raw water having a low carbon nitrogen consumption, the first oxygen-free/aerobic reaction unit 1A only needs to be kept in an oxygen-free reaction state (as long as a corresponding structure and member can be provided).

A second continuous batching unit 7 and a second anoxic/aerobic reaction unit 7A are sequentially symmetrically symmetrical to the other side of the single tank body, and the structures thereof are respectively a first continuous batching unit 1 and a first It is the same as the oxygen-free/exhaled reaction unit (1A).

The exhalation unit 6 in which one end of the first anoxic/aerobic reaction unit 1A, the second anoxic reaction unit 5A, and the second anoxic/aerobic reaction unit 7A uses a common plate wall is provided on each common plate wall. Communicated with the first anoxic/aerobic reaction unit 1A, the second anoxic reaction unit 5A and the second anoxic/aerobic reaction unit 7A respectively through the pipe inlet; The exhalation unit 6 is preferably communicated with the first anoxic reaction unit 5 through a pipeline equipped with a pump (not shown), so that the treated water having a relatively high nitrate in the exhalation unit 6 is the first anoxic reaction unit. (5) It is advantageous to be transferred to (and flows into the second anoxic reaction unit 5A), and it is advantageous to perform denitrification by providing nitrate to the anoxic unit, and at the same time, the phosphate accumulating bacteria are adsorbed to the phosphorus of the anoxic unit. This is advantageous for the removal of phosphorus from wastewater with a relatively high phosphorus content.

The exhalation unit 6 and the sludge water separation unit 2 may be installed in an open type, but it is preferable not to install them in an open type; The sludge water separation unit 2 communicates with the first continuous batching unit 1 and the second continuous batching unit 7 through a pipeline equipped with a pump, respectively, so that the first continuous batching unit 1 and the second It is preferable to communicate with the bottom or the bottom of the first continuous batching unit 1 and the second continuous batching unit 7 so as to receive the treatment liquid and/or the precipitated Journey from the continuous batching unit 7, and the treatment liquid and The precipitated Journey is separated into a Journey and a supernatant through gravity in the sludge water separation unit 2; The top of the sludge water separation unit 2 is higher than the other units, and the sludge water separation unit 2 has a pipeline (preferably a pipeline extending from the top or top thereof) so that the supernatant is advantageously transferred to the corresponding unit. Preferably, in this case, the first anoxic reaction unit 5, the second anoxic reaction unit 5A, the exhalation unit 6, and the first continuous batching unit ( 1) and the second continuous batching unit 7 communicated, and when the water quality of the supernatant has already been judged as passing, it is transferred to the continuous batching unit in which the supernatant is being precipitated and discharged; When the nitrate root content is extremely high (for example NOx>15 mg/L), it is transferred to the first anoxic reaction unit 5; When the nitrate root content is excessively high (for example 15 mg/L>NOx>10 mg/L), it is transferred to the second anoxic reaction unit 5A; When the nitrate root content is excessively low and the ammonia nitrogen or carbon source content is high (NH4>10mg/L), it is transferred to the aerobic unit 6; In most other cases, they are all transferred to a continuous batch unit where the reaction is being carried out under oxygen-free or aerated or stationary conditions.

Total anoxic unit (3), sludge water separation unit (2), anaerobic reaction unit (4), first anoxic reaction unit (5), second anoxic reaction unit (5A), aerobic unit (6), first continuous ash The bulk volume ratio of the unit (1), the first anoxic/aerobic reaction unit (1A), the second continuous batching unit (7) and the second anoxic/aerobic reaction unit (7A) is 0.5:0.5:1:1:1 :5:3:1:3:1.

In winter, a porous filler may be added to the anaerobic reaction unit, the first anoxic reaction unit, the second anoxic reaction unit, and the aerobic reaction unit.

Each of the pipeline and the pipe inlet may be provided with a valve for controlling the opening and closing and flow rate; Each of the pumps is capable of controlling output (eg, a sludge pump, etc.), and includes, for example, a converter to control the flow rate; Each unit is equipped with an on-line detector (for example, a redox potential meter) to detect nitrate concentration, etc., and in particular, it is controlled through each pump and/or valve, and in particular, the nitrate nitrogen in the total anoxic unit (3) is It is controlled at 0.5~1.5mg/L.

Example 2: Typical application example (case A)

As an example, the single tank body of the structure of Example 1 has a length of 65.3 meters, a width of 48.8 meters, and a height of 6m/8m, and the daily (24 hours) flow rate (treatment) is 25000m ³ , and 12 in Jiangsu area. -Sewage where carbon nitrogen consumption in January is about 50% lower than that of typical China (northern) regions (of which BOD 5/TN is 2.1, and when processing in an improved continuous batch reactor of the prior art, a separate carbon source must be added. As shown in Table 1, a cycle operation was performed with divided time as shown in Table 1, and no carbon source drugs were added during the operation period.

The water quality conditions before and after the wastewater undergoes the above treatment are shown in Table 2, and the results show that the 10-unit improved continuous batch reactor of the present invention can effectively treat wastewater with low carbon nitrogen consumption, which is currently It is an ideal biological dephosphorylation device for sewage.

Example 3 Typical Application Example (Case B)

The single tank body of the structure of Example 1 as an example has a length of 88.3 meters, a width of 66.6 meters, and a height of 8m/9m, and the daily (24 hours) flow rate (treatment) is 62500m ³ , and 1 in the Hunan area. Sewage water whose monthly carbon nitrogen consumption is about 25% lower than that of typical Chinese (northern) regions (of which BOD 5/TN is 2.88, and when treated in an improved continuous batch reactor of the prior art, a separate carbon source must be added to discharge water) As shown in Table 1, a cycle operation was performed with divided time as shown in Table 1, and no carbon source drugs were added during the operation period.

The water quality conditions before and after the wastewater undergoes the above treatment are shown in Table 2, and the results show that the 10-unit improved continuous batch reactor of the present invention can effectively treat wastewater with low carbon nitrogen consumption, which is currently It is an ideal biological dephosphorylation device for sewage.

Claims (10)

Anaerobic reaction unit (4), first anoxic reaction unit (5), sludge water separation unit (2), aerobic unit (6), first sequencing batch unit (1) and second continuous Including an ash unit 7, a pre-anoxic unit 3, a second anoxic reaction unit 5A, a first anoxic/aerobic reaction unit 1A and a second anoxic/aerobic reaction unit 7A In the multi-unit improved continuous batch reactor further comprising),
The anaerobic reaction unit 4 accommodates raw water, receives the bottom sediment from the total anoxic unit 3, and can react its contents under anaerobic conditions;
The first anoxic reaction unit 5 can receive the supernatant from the sludge water separation unit 2, receive the treatment liquid from the anaerobic reaction unit 4, and react the contents of the liquid under oxygen-free conditions;
The second anoxic reaction unit 5A accommodates the supernatant from the sludge water separation unit 2, receives the treatment liquid from the first anoxic reaction unit 5, and can react the contents of the liquid under anoxic conditions. ;
The aerobic unit 6 can receive the supernatant from the sludge water separation unit 2, receive the treatment liquid from the second anoxic reaction unit 5A, and react the contents of the liquid under aeration conditions;
The first anoxic/aerobic reaction unit 1A can receive the effluent water from the anaerobic reaction unit 4, receive the treatment liquid from the aerobic unit 6, and react the contents of the liquid under oxygen-free or aerobic conditions; Further, the first anoxic/aerobic reaction unit 1A is connected to the external pipeline on the anaerobic reaction unit 4 through a pipeline equipped with a pump to receive the fractionated raw water;
The first continuous batching unit 1 receives the supernatant from the sludge water separation unit 2, receives the treatment liquid from the first anoxic/aerobic reaction unit 1A, and stores the contents without oxygen or aeration or standing. Can react under (standing) conditions or precipitate out;
The second anoxic/aerobic reaction unit 7A can receive the effluent water from the anaerobic reaction unit 4, receive the treatment liquid from the aerobic unit 6, and react the contents of the liquid under oxygen-free or aerobic conditions; In addition, the second anoxic/aerobic reaction unit 7A is connected to an external pipeline on the anaerobic reaction unit 4 through a pipeline equipped with a pump to receive the fractionated raw water;
The second continuous batching unit 7 receives the supernatant from the sludge water separation unit 2, receives the treatment liquid from the second anoxic/aerobic reaction unit 1A, and stores the contents without oxygen or aeration or standing. React under conditions or precipitate out;
The sludge water separation unit 2 accommodates the treatment liquid and/or the precipitated Journey from the first continuous batching unit 1 and the second continuous batching unit 7, and the supernatant and/or the treatment liquid and/or the precipitated Journey. Journey can be separated; In addition, in order to advantageously transfer the supernatant to the corresponding unit, the top of the sludge water separation unit 2 is higher than that of the other units, and the first anoxic reaction unit 5, the second anoxic reaction unit 5A, respectively through a pipeline, Connected with the exhalation unit 6, the first continuous batching unit 1 and the second continuous batching unit 7; And
The total anoxic unit 3 can receive the sediment from the sludge water separation unit 2 and react the sediment under anoxic conditions;
Total anoxic unit (3), sludge water separation unit (2), anaerobic reaction unit (4), first anoxic reaction unit (5), second anoxic reaction unit (5A), aerobic unit (6), first continuous ash The volume ratio of the unit (1), the first anoxic/aerobic reaction unit (1A), the second continuous batching unit (7) and the second anoxic/aerobic reaction unit (7A) is 0.2 to 0.8: 0.2 to 0.8: 0.5 to 1.5. ：0.5~1.5:0.5~1.5:2~8:1.5~4.5:0.5~1.5:1.5~4.5:0.5~1.5 multi-unit improved type continuous batch reactor. The method of claim 1,
Anaerobic reaction unit (4), first anoxic reaction unit (5), first continuous batching unit (1), second continuous batching unit (7), total anoxic unit (3), second anoxic reaction unit (5A), A stirring device is provided in the first anoxic/aerobic reaction unit 1A and the second anoxic/aerobic reaction unit 7A;
An aeration device is provided in the exhalation unit 6, the first continuous batching unit 1, the second continuous batching unit 7, the first anoxic/aerobic reaction unit 1A and the second anoxic/exhaling reaction unit 7A. Become;
The first continuous batching unit 1 and the second continuous batching unit 7 are provided with a discharge device for discharging the Journey to the outside of the multi-unit improved type continuous batch reactor; And/or
The anaerobic reaction unit 4, the first anoxic reaction unit 5, the second anoxic reaction unit 5A and the aerobic unit 6 containing a filler; Or the anaerobic reaction unit 4, the first anoxic reaction unit 5 and the second anoxic reaction unit 5A containing a filler; Or a multi-unit improved continuous batch reactor, characterized in that the filler is included in the exhalation unit (6). The method of claim 1,
Characterized in that when one of the first continuous batching unit 1 and the second continuous batching unit 7 reacts the contents of the contents under oxygen-free or aerated or stationary conditions, the other one precipitates and discharges the contents. Multi-unit improved continuous batch reactor. The method of claim 1,
A multi-unit, characterized in that the first anoxic/aerobic reaction unit 1A and the second anoxic/aerobic reaction unit 7A are provided with receiving means for receiving carbon sources from outside the multi-unit improved continuous batch reactor. An improved continuous batch reactor. The method of claim 1,
The first anoxic reaction unit (5) is a multi-unit improved type continuous batch reactor, characterized in that it is capable of receiving the treatment liquid from the aerobic unit (6). The method of claim 1,
The first anoxic/aerobic reaction unit (1A) and the second anoxic/aerobic reaction unit (7A) may react the contents of the liquid under oxygen-free conditions, or the contents of the liquid may be reacted under aeration conditions. Unit upgraded continuous batch reactor. The method of claim 1,
Total anoxic unit (3), sludge water separation unit (2), anaerobic reaction unit (4), first anoxic reaction unit (5), second anoxic reaction unit (5A), aerobic unit (6), first continuous ash The volume ratio of the unit (1), the first anoxic/aerobic reaction unit (1A), the second continuous batching unit (7) and the second anoxic/aerobic reaction unit (7A) is 0.3 to 0.7: 0.3 to 0.7: 0.8 to 1.2 :0.8~1.2:0.8~1.2:3~7:2.5~3.5:0.8~1.2:2.5~3.5:0.8~1.2. The method of claim 7,
Total anoxic unit (3), sludge water separation unit (2), anaerobic reaction unit (4), first anoxic reaction unit (5), second anoxic reaction unit (5A), aerobic unit (6), first continuous ash The volume ratio of the unit (1), the first anoxic/aerobic reaction unit (1A), the second continuous batching unit (7) and the second anoxic/aerobic reaction unit (7A) is 0.4 to 0.6: 0.4 to 0.6: 0.9 to 1.1. : 0.9 to 1.1: 0.9 to 1.1: 4 to 6: 2.8 to 3.2: 0.9 to 1.1: 2.8 to 3.2: 0.9 to 1.1, characterized in that the multi-unit improved type continuous batch reactor. The method according to any one of claims 1 to 8,
This is a multi-unit improved continuous batch reactor, characterized in that the structure of 10 units of one reactor. In the method for treating raw water containing organic matter through a multi-unit improved continuous batch reactor according to any one of claims 1 to 8,
(1) carried out in an anaerobic reaction unit, mixing raw water with a stirrer and reacting under anaerobic conditions;
(2) reacting the treatment liquid obtained in step (1) under oxygen-free conditions, carried out in a first oxygen-free reaction unit;
(3) reacting the treatment liquid obtained in step (2) under oxygen-free conditions, carried out in a second oxygen-free reaction unit;
(4) reacting the treatment liquid obtained in step (3) under aeration conditions, carried out in an aerobic unit;
(5) mixing the treatment liquid obtained in step (4) with the treatment liquid obtained in step (1), and reacting under oxygen-free conditions, carried out in the first oxygen-free/aerobic reaction unit;
(6) reacting the treatment liquid obtained in step (5) under oxygen-free conditions, carried out in a first continuous batching unit;
(7) reacting the treatment liquid obtained in step (6) under aeration conditions, carried out in a first continuous batching unit;
(8) a step of allowing the treatment liquid obtained in step (7) to be settled and precipitated, which is carried out in the first continuous batching unit; And
(9) carried out in a second continuous batching unit, comprising the step of precipitating and discharging the treatment liquid obtained in step (8),
Among them, taking part of the treatment liquid in step (6) or step (7) and taking part of the precipitated Journey in step (8); Or taking some treatment liquid in step (6) or step (7) or taking part of the sedimented Journey in step (8); Or in steps (6) and (7) some treatment liquid is taken and in step (8) some precipitated Journey is taken; Alternatively, a part of the treatment liquid is taken in steps (6) and (7), or a partially precipitated Journey is taken in step (8) to separate and obtain a supernatant and a Journey, of which the Journey is selectively reacted under anaerobic conditions, Raw water treatment containing organic matter, characterized in that circulating use in 1), and circulating the supernatant obtained separately into the treatment liquid of steps (2), (3), (4), (6) and (7) Way.

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