CN210620382U - Facultative biomembrane hydrolysis reaction tank and wastewater treatment system - Google Patents
Facultative biomembrane hydrolysis reaction tank and wastewater treatment system Download PDFInfo
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Abstract
The utility model discloses a facultative biomembrane hydrolysis reaction tank and wastewater treatment system, the reaction tank is provided with an acetic acid inlet, a wastewater inlet, a sludge inlet, a water outlet and a sludge outlet, the reaction tank is of a multi-gallery structure, the reaction tank is divided into a plurality of galleries which are communicated with each other by gallery partition walls, each gallery is provided with a plurality of air inlet main pipes, a plurality of air inlet branch pipes, a plurality of rotary-cut mixed flow aerators, fillers and filler supports; each air inlet branch pipe is communicated with an air inlet main pipe, each air inlet main pipe is communicated with an air inlet of a corresponding rotary-cutting mixed flow aerator, and each rotary-cutting mixed flow aerator is arranged at the bottom of the reaction tank; the filler support is installed in every corridor, and the filler is located on the filler support. The rotary-cut mixed flow aerator is arranged at the bottom of the reaction tank, and the gas-liquid turbulence formed in the aeration process is directly utilized to fully stir the water body, so that the problem that sludge is accumulated at the bottom of the reaction tank is avoided.
Description
Technical Field
The utility model belongs to the waste water treatment field especially relates to a facultative biological membrane hydrolysis reaction pond and effluent disposal system.
Background
The hydrolytic acidification technology can improve the biodegradability of the wastewater, is beneficial to the subsequent aerobic biological treatment, and is commonly used in the sewage pretreatment stage. The technology controls the anaerobic digestion process of the sewage in a hydrolysis acidification stage without entering a hydrogen-producing and acetic acid-producing stage, and utilizes hydrolysis acidification bacteria to open-loop crack macromolecular substances which are highly toxic and difficult to degrade, such as aromatic hydrocarbons and heterocyclic substances, and convert the macromolecular substances into easily degradable micromolecular substances, such as Volatile Fatty Acids (VFAs), alcohols and the like. Two types of strains are present simultaneously during anaerobic digestion: research proves that the facultative hydrolytic acidification bacteria and the anaerobic hydrolytic acidification bacteria are superior to the anaerobic hydrolytic acidification bacteria in COD removal rate, and in addition, the facultative hydrolytic acidification bacteria have no strict requirements on growth environment such as ORP, pH, temperature, oxygen content and the like and have stronger environmental adaptability. Compared with the traditional anaerobic hydrolytic acidification, the micro-aerobic environment is more favorable for the physiological metabolism of facultative hydrolytic acidification bacteria, and the hydrolytic acidification effect is enhanced.
However, sludge in the conventional facultative biomembrane reaction tank is easily accumulated on the bottom of the reaction tank.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a facultative biomembrane hydrolysis reaction pond and effluent disposal system, this reaction pond sets up rotary-cut mixed flow aerator in the bottom, directly utilizes the gas-liquid torrent intensive mixing water that the aeration process formed, avoids mud at the accumulational problem in reaction tank bottom.
In order to solve the above problem, the technical scheme of the utility model is that:
a facultative biomembrane hydrolysis reaction tank, the said reaction tank has acetic acid inlet, wastewater inlet, mud inlet, water outlet, mud outlet, the said reaction tank is a multi-gallery structure, the said reaction tank is divided into a plurality of galleries that communicate each other by the gallery partition wall, each said gallery has a plurality of air admission main pipes, a plurality of air admission branch pipes, a plurality of rotary cut mixed flow aerators, fillers, filler support;
each air inlet branch pipe is communicated with the air inlet main pipe, each air inlet main pipe is communicated with an air inlet of the corresponding rotary-cutting mixed flow aerator, and each rotary-cutting mixed flow aerator is arranged at the bottom of the reaction tank;
the filler support is installed between every corridor, the filler is located on the filler support.
In a preferred embodiment, the rotary-cutting mixed-flow aerator is arranged at the bottom of the reaction tank every 4-9 square meters.
In a preferred embodiment, the dissolved oxygen in the reaction tank is kept at 0.4-0.6 mg/l.
In a preferred embodiment, the sludge inlet and the sludge outlet are communicated by a pipeline, and a sludge reflux pump is arranged on the pipeline.
The utility model also provides a wastewater treatment system, including above-mentioned embodiment facultative biomembrane hydrolysis reaction pond.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:
the utility model discloses at a plurality of rotary-cut mixed flow aerators of reaction tank bottom installation, because rotary-cut mixed flow aerator itself not only has the aeration function, but also has the function of stirring, consequently install rotary-cut mixed flow aerator in the bottom, can directly utilize the gas-liquid torrent intensive mixing water that the aeration process formed, prevent the piling up of mud in the reaction tank bottom. And the rotary-cut mixed-flow aerator is used, and the intermittent aeration to the air inlet of the rotary-cut mixed-flow aerator can be adopted to control the dissolved oxygen amount of the water in the reaction tank, so that the micro-aerobic condition for the growth of facultative hydrolytic acidification bacteria is facilitated, and the stability and the high efficiency of the hydrolytic acidification process are ensured. Because the air quantity required by the intermittent aeration is small without using an additional mechanical stirring facility, the air quantity can be allocated from the existing air pipe system, and a fan is not required to be additionally equipped, so the utility model has the advantages of low investment and operation cost and energy conservation.
The utility model discloses because at the bottom installation rotary-cut mixed flow aerator of reaction tank, owing to can control to the inside aeration of rotary-cut mixed flow aerator, consequently select to fill into the very little air or when not filling in to rotary-cut mixed flow aerator, then be the state of oxygen deficiency in the reaction tank, the reaction tank just has the function of denitrification so. Therefore, it isThe utility model discloses possess simultaneously and hydrolyze acidizing and two kinds of functions of denitrification, be one kind and combined the reaction equipment who hydrolyzes acidizing pond and denitrification pond, all be suitable for high concentration, highly toxic organic waste water and the influent of high nitrate nitrogen/total nitrogen content, played and improved play water BOD5COD, reduction of COD and nitrate nitrogen/total nitrogen. Therefore, the utility model can reduce the water inlet load of the subsequent aerobic biological treatment and nitration treatment facilities, and saves the cost and the energy consumption for the whole water treatment system.
Drawings
FIG. 1 is a schematic plan view of a facultative biofilm hydrolysis reaction tank provided in example 1;
fig. 2 is a schematic cross-sectional structural view of the facultative biofilm hydrolysis reaction tank provided in example 1.
Description of reference numerals: 2-a main air inlet pipe; 3-an air inlet branch pipe; 4-rotary cutting mixed flow aerator; 5-a filler; 6-a filler support; 7-gallery partition walls; 8-sludge reflux pump.
Detailed Description
The facultative biomembrane hydrolysis reaction tank and the wastewater treatment system provided by the invention are further described in detail with reference to the accompanying drawings and specific examples. The advantages and features of the present invention will become more fully apparent from the following description and appended claims.
Example 1
Referring to fig. 1 and 2, in one embodiment, a facultative biomembrane hydrolysis reaction tank is provided with an acetic acid inlet, a wastewater inlet, a sludge inlet, a water outlet and a sludge outlet, the reaction tank is of a multi-gallery structure, the reaction tank is divided into a plurality of galleries which are communicated with one another by gallery partition walls 7, the gallery structure increases hydraulic retention time and improves the treatment efficiency of a hydrolysis acidification system, the embodiment is divided into five galleries which are communicated with one another by four gallery partition walls 7, the gallery partition walls 7 are arranged, sewage sequentially enters each gallery of the reaction tank in an up-down rolling manner, and each gallery is internally provided with a plurality of main air inlet pipes 2, a plurality of branch air inlet pipes 3, a plurality of rotary-cut mixed flow aerators 4, fillers 5 and filler supports 6; packing 5 is also known as biofilm packing;
the air inlet of each rotary-cut mixed flow aerator 4 is communicated with an air inlet branch pipe 3, each air inlet branch pipe 3 is communicated with an air inlet main pipe 2, and each rotary-cut mixed flow aerator 4 is arranged at the bottom of the reaction tank;
the filler support 6 is installed in every corridor, and filler 5 is located on filler support 6, forms the biomembrane through using the filler, strengthens microorganism and waste water interact, improves the treatment effeciency of hydrolysis acidification.
The rotary-cut mixed flow aerator 4 is arranged at the bottom of the reaction tank, and the rotary-cut mixed flow aerator 4 has the aeration function and the stirring function, so that the rotary-cut mixed flow aerator 4 is arranged at the bottom, the gas-liquid turbulence formed in the aeration process can be directly utilized to fully stir the water body, and the accumulation of sludge at the bottom of the reaction tank is prevented. And the rotary-cut mixed-flow aerator 4 is used, and intermittent aeration can be adopted to the air inlet of the rotary-cut mixed-flow aerator 4 to control the dissolved oxygen amount of the water in the reaction tank, so that the micro-aerobic condition for the growth of facultative hydrolytic acidification bacteria is facilitated, and the stability and the high efficiency of the hydrolytic acidification process are ensured. Because the additional mechanical stirring facilities are not used and the air quantity required by intermittent aeration is small, the air can be allocated from the existing air pipe system without additionally arranging a fan, so the embodiment has low investment and operation cost and saves energy.
In the embodiment, because the rotary-cut mixed flow aerator 4 is arranged at the bottom of the reaction tank, and the aeration to the interior of the rotary-cut mixed flow aerator 4 can be controlled, when a very small amount of air is filled into the rotary-cut mixed flow aerator 4 or the rotary-cut mixed flow aerator is not filled, the reaction tank is in an anoxic state, and the reaction tank has the denitrification function. Therefore, the utility model discloses possess simultaneously and hydrolyze acidizing and two kinds of functions of denitrification, be one kind and combined the reaction equipment who hydrolyzes acidizing pond and denitrification pond, all be suitable for high concentration, high toxicity organic waste water and the intaking of high nitrate nitrogen/total nitrogen content, played and improved play water BOD5COD, reduction of COD and nitrate nitrogen/total nitrogen. Therefore, the embodiment can reduce the water inlet load of the subsequent aerobic biological treatment and nitrification treatment facilities, and saves the cost and energy consumption of the whole water treatment system.
This example intermittently dosed a small amount of the nutrient solution of acetic acid to the reaction tank during the operation of the system. The nutrient solution has the following functions: acetic acid is a micromolecular carbon source which is easier to utilize by facultative hydrolytic acidification bacteria, can be used as supplement of strain nutrient supply, creates good growth conditions for strains, is beneficial to domestication of the strains, and plays a role in inducing the strains to degrade pollutants, thereby ensuring the hydrolytic acidification efficiency; the organic acid formed by the hydrolysis and acidification of the strain alone cannot provide a stable carbon source, but the latter is a key factor influencing the denitrification process, so that the denitrification effect of the reaction tank can be enhanced by regularly adding acetic acid as an electron donor for converting nitrate nitrogen by denitrifying bacteria.
In a preferred embodiment, the rotary-cutting mixed-flow aerator is arranged at the bottom of the reaction tank every 4-9 square meters.
In a preferred embodiment, the rotary-cutting mixed-flow aerator 4 in each gallery aerates for 30s-1min every 1-2 h so as to control the dissolved oxygen of the reaction tank to be 0.4-0.6 mg/l.
In a preferred embodiment, the sludge inlet and the sludge outlet are communicated through a pipeline, and the pipeline is provided with the sludge return pump 8, so that the sludge is recycled, and the cost is reduced.
The working principle of the reaction cell of the embodiment is as follows:
referring to fig. 1 and 2, according to the partition wall structure, sewage sequentially enters each gallery of the facultative biomembrane hydrolysis reaction tank in an up-down turning manner. Intermittent aeration is carried out inside each gallery: aerating for 30s-1min every 1-2 h to control the dissolved oxygen of the reaction tank to be kept at about 0.4-0.6 mg/l, and more preferably about 0.5mg/l, so as to create a facultative environment for the biological membrane in the reaction tank. The aerator can simultaneously play the roles of oxygen supply and stirring. According to the operation condition of the reaction tank, a small amount of acetic acid nutrient solution is intermittently added into the reaction tank. Under the facultative condition, the facultative hydrolytic acidification bacteria become dominant strains and are attached to the fillers 5 in each gallery to carry out hydrolytic acidification reaction. The facultative hydrolytic acidification bacteria carry out biological metabolism by utilizing acetic acid and organic pollutants in the sewage, and decompose organic matters which are difficult to degrade and have large molecules in the sewage into organic acids with small molecules and the like, thereby improving the biodegradability of the sewage and reducing the COD value. Then, little air is filled or not aerated into each gallery, so that the anoxic condition is kept in the reaction tank, and the organic acid formed by hydrolytic acidification and the externally added acetic acid further become a high-quality carbon source of denitrifying bacteria to carry out a denitrification process, thereby reducing the content of effluent nitrate nitrogen/total nitrogen. The sludge formed in the pool is settled and then flows back to the water inlet position through the sludge return pump so as to prevent the sludge loss.
Example 2
The embodiment also provides a wastewater treatment system, which comprises the facultative biomembrane hydrolysis reaction tank in the embodiment 1.
The utility model has the characteristics of it is following:
1. the utility model discloses throw a small amount of acetic acid nutrient solution to the reaction tank intermittently during system's operation, existing growth and the domestication that do benefit to facultative hydrolysis acidizing fungus provide stable carbon source for denitrification again, have improved hydrolytic acidification and denitrification's efficiency.
2. The utility model discloses do not use extra mechanical stirring equipment, the inside aerator of reaction tank possess the function of oxygen suppliment and stirring simultaneously, and aeration gas can be followed and is allocated in current trachea system, need not additionally to equip the fan, invests in the running cost low and energy saving.
3. The utility model has two functions of hydrolytic acidification and denitrification, can reduce the COD value of the sewage and improve the BOD5The COD value reduces the nitrate nitrogen/total nitrogen content, and is suitable for high-concentration and high-toxicity organic wastewater and influent water with high nitrate nitrogen/total nitrogen content.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, the changes are still within the scope of the present invention if they fall within the scope of the claims and their equivalents.
Claims (5)
1. A facultative biomembrane hydrolysis reaction tank is characterized in that the reaction tank is provided with an acetic acid inlet, a wastewater inlet, a sludge inlet, a water outlet and a sludge outlet, the reaction tank is of a multi-gallery structure, the reaction tank is divided into a plurality of galleries which are communicated with one another by gallery partition walls, and each gallery is provided with a plurality of main air inlet pipes, a plurality of air inlet branch pipes, a plurality of rotary-cut mixed flow aerators, a filler and a filler support;
each air inlet branch pipe is communicated with the air inlet main pipe, each air inlet main pipe is communicated with an air inlet of the corresponding rotary-cutting mixed flow aerator, and each rotary-cutting mixed flow aerator is arranged at the bottom of the reaction tank;
the filler support is installed in every corridor, the filler is located on the filler support.
2. The facultative biomembrane hydrolysis reaction tank of claim 1, wherein every 4-9 square meters of the bottom of the reaction tank is provided with one rotary-cut mixed-flow aerator.
3. The facultative biomembrane hydrolysis reaction tank of claim 1, wherein the dissolved oxygen content in the reaction tank is maintained at 0.4-0.6 mg/l.
4. The facultative biomembrane hydrolysis reaction tank of claim 1, wherein the sludge inlet and the sludge outlet are communicated by a pipeline, and a sludge reflux pump is arranged on the pipeline.
5. A wastewater treatment system comprising the facultative biofilm hydrolysis reaction tank according to any one of claims 1 to 4.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110422927A (en) * | 2019-08-09 | 2019-11-08 | 浙江聚源环保科技有限公司 | Simultaneous oxygen biomembrane hydrolysis reaction bath and waste water treatment system and stain disease processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110422927A (en) * | 2019-08-09 | 2019-11-08 | 浙江聚源环保科技有限公司 | Simultaneous oxygen biomembrane hydrolysis reaction bath and waste water treatment system and stain disease processing method |
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