阅读说明：本技术 处理高含盐有机废水的固定化光合细菌生物转刷反应器 (Immobilized photosynthetic bacteria biological rotating brush reactor for treating high-salt-content organic wastewater ) 是由 孔秀琴 杨廷文 张亚玲 赵霞 贾小宁 张庆芳 李仕国 狄成功 万宏亮 朱建国 马 于 2021-10-10 设计创作，主要内容包括：本发明公开了处理高含盐有机废水的固定化光合细菌生物转刷反应器,包含反应池和转刷装置,反应池为矩形钢筋混凝土构筑物,毛刷辊平行于反应池的宽边且安装在反应池的水面,毛刷辊一半浸没在水中,一半暴露在空气中,主轴的一端通过轴承、密封套管、联轴器、传动装置与电动机连接,主轴的另一端与轴承座连接,主轴带动毛刷辊转动,电动机及轴承座底部设置有基础支撑座。本生物转刷反应器提高了光合细菌生物量,通过慢速转动进行微量曝气,便于菌体回收。在转动的过程中,辊表明毛刷上会形成光合细菌固定化生物膜,并随转动循环接收光照和吸收氧气,降解有机物,使得耐盐性光合细菌优势生长,适用于处理高含盐有机工业废水。(The invention discloses an immobilized photosynthetic bacteria biological rotating brush reactor for treating high-salt organic wastewater, which comprises a reaction tank and a rotating brush device, wherein the reaction tank is a rectangular reinforced concrete structure, a brush roller is parallel to the wide edge of the reaction tank and is arranged on the water surface of the reaction tank, one half of the brush roller is immersed in water, the other half of the brush roller is exposed in air, one end of a main shaft is connected with a motor through a bearing, a sealing sleeve, a coupler and a transmission device, the other end of the main shaft is connected with a bearing seat, the main shaft drives the brush roller to rotate, and a base support seat is arranged at the bottom of the motor and the bearing seat. The biological rotating brush reactor improves the biomass of photosynthetic bacteria, and micro aeration is carried out through slow rotation, so that the recovery of thalli is facilitated. In the rotating process, the roller shows that the brush can form a photosynthetic bacteria immobilized biomembrane, circularly receives illumination and absorbs oxygen along with rotation, degrades organic matters, enables the salt-tolerant photosynthetic bacteria to grow dominantly, and is suitable for treating high-salt organic industrial wastewater.)

1. Handle high fixed photosynthetic bacteria biology of containing salt organic waste water and change brush reactor, its characterized in that: comprises a reaction tank (1) and a rotating brush device (2), wherein the rotating brush device (2) consists of a motor (2-1), a transmission device (2-2), a coupler (2-3), a main shaft (2-4), a brush roller (2-5), a bearing (2-6), a sealing sleeve (2-7) and a bearing seat (2-8), the reaction tank (1) is a rectangular reinforced concrete structure, the brush roller (2-5) is parallel to the wide edge of the reaction tank (1) and is arranged on the water surface of the reaction tank (1), one half of the brush roller (2-5) is immersed in water, the other half is exposed in air, one end of the main shaft (2-4) is connected with the motor (2-1) through the bearing (2-6), the sealing sleeve (2-7), the coupler (2-3) and the transmission device (2-2), the other end of the main shaft (2-4) is connected with a bearing seat (2-8), the main shaft (2-4) drives the brush roller (2-5) to rotate, and a basic supporting seat (a) is arranged at the bottom of the motor (2-1) and the bearing seat (2-8).

2. The biological brush reactor of immobilized photosynthetic bacteria for treating organic wastewater with high salt content of claim 1, wherein: the reaction tank (1) is designed and calculated according to sludge organic load or hydraulic retention time parameters of related bioreactors, a plurality of reactors can be operated in parallel or in series, and the size of a single reaction tank (1): length: 5000-10000 mm, width: 2000 ~ 3000mm, effective depth of water 2000 ~ 3000mm, the pond top superelevation: 400 mm.

3. The biological brush reactor of immobilized photosynthetic bacteria for treating organic wastewater with high salt content of claim 1, wherein: the outer diameter of the brush roller (2-5) is 500-700 mm, polyurethane brush wires are planted on the outer surface of the brush roller, the length is 150mm, and the outer diameter of the roller shaft is 200-400 mm.

4. The biological brush reactor of immobilized photosynthetic bacteria for treating organic wastewater with high salt content of claim 1, wherein: the length of the brush rollers (2-5) is determined according to the width of the reaction tank (1), a gap of 100mm is reserved between the brush rollers and the tank wall, and hard PVC of an iron pipe is embedded in the center of the roller shafts of the brush rollers (2-5).

5. The biological brush reactor of immobilized photosynthetic bacteria for treating organic wastewater with high salt content of claim 1, wherein: the brush rollers (2-5) are arranged in a plurality of groups in parallel in the reaction tank (1).

6. The biological brush reactor of immobilized photosynthetic bacteria for treating organic wastewater with high salt content of claim 1, wherein: the power of the motor (2-1) is determined according to the length of the brush roller (2-5) and is between 7.5 and 11 kw.

7. An immobilized photosynthetic bacteria biological rotating brush reactor for treating high-salt organic wastewater based on claim 1, which is characterized in that: the working principle of the reactor is as follows: the reactor is started, the motor (2-1) drives the brush roller (2-5) to rotate at a slow speed for micro-aeration, so that thalli can be conveniently recovered, in the rotating process, a photosynthetic bacteria immobilized biomembrane is formed on the surface of the brush roller (2-5), one half of the photosynthetic bacteria immobilized biomembrane is immersed in water, and the other half of the photosynthetic bacteria immobilized biomembrane is exposed in air and continuously replaced along with the rotation; when the brush rollers (2-5) are exposed in the air, microorganisms can absorb oxygen in the atmosphere to carry out pollutant metabolism activity, and the oxygen is brought into sewage through the rotation of the brush rollers (2-5); when the brush rollers (2-5) enter water, microorganisms degrade organic matters under the dark and micro-aerobic condition, so that the expense caused by mechanical aeration in the biological wastewater treatment process is reduced; the photosynthetic bacteria on the brush rollers (2-5) can repeatedly utilize natural illumination to grow and reproduce in the rotating process, so that the problem of insufficient illumination absorption is solved, and the predominant growth of the photosynthetic bacteria is facilitated; the hairbrush of the hairbrush roller (2-5) is a polyurethane filament, is not easy to corrode and is light in weight, and the filament has a large specific surface area and can be attached with a large amount of biomembranes; when the biomass is saturated, the brush rollers (2-5) can be integrally taken down and replaced, and photosynthetic bacteria are centrifugally collected in a suitable high-speed centrifugal device.

Technical Field

The invention relates to a sewage treatment device, in particular to an immobilized photosynthetic bacteria biological brush reactor for treating high-salt organic wastewater.

Background

The salt content of the high-salt wastewater is usually 5-20%, the COD content is more than 1000mg/L, such as dye chemical wastewater, petroleum processing wastewater, seawater toilet flushing wastewater and the like, microorganisms in a common bioreactor are difficult to adapt to such a high-salt environment, the wastewater can reach the standard and be discharged after being subjected to multiple grading treatments by anaerobic and aerobic processes under the conditions of dilution and long-term domestication, and the defects of complex process flow, large floor area, high investment and operation cost, low impact load resistance, large sludge production amount and the like exist, so that the application of a biological method in the high-salt wastewater purification is influenced.

Photosynthetic bacteria (PSB) are separated, extracted and cultured from seawater, have certain salt tolerance and are suitable for living in an environment with higher salt content, the PSB is a prokaryotic microorganism with an original light energy synthesis system, belongs to gram-negative bacteria, has the shapes of rod, sphere, semi-ring and helix, has the diameter of 0.3-2.6 mu m, and has photosynthetic carriers in cells of the photosynthetic bacteria, wherein the carriers are sphere or cell bodies with the diameter of about 600-1000A and are formed by cell membrane differentiation, and the carriers contain bacteriochlorophyll and carotenoid and can carry out photosynthetic phosphorylation reaction and photoredox reaction. In aerobic darkness, the bacteria lack this vector, when the metabolism of organic acids proceeds through the TC (tricarboxylic acid cycle) cycle; during anaerobic illumination, a color carrier is quickly formed, a metabolic pathway is quickly converted, and the oxidation-reduction reaction and the photooxidation-reduction reaction of dissimilation and assimilation of organic acid are closely combined. The cell structure and the unique substance and energy metabolism of some species of the rhodospirillaceae are commonly used for wastewater treatment, so that the species can show incomparable superiority in the treatment of high-concentration organic wastewater containing salt. Meanwhile, the photosynthetic bacteria have higher economic value and can be recycled, the protein content of the photosynthetic bacteria cells reaches 30-80% of the dry weight of the cells, the mass concentration of the coenzyme Q10 reaches 88.8mg/g, and the photosynthetic bacteria cells also contain 5-ALA, pigments and the like, so the photosynthetic bacteria cells are high-quality biological materials which can be applied to the aspects of health and medical treatment.

The photosynthetic bacteria reactor needs to meet the following conditions: (1) illumination: the illumination with proper intensity is a necessary condition for culturing the photosynthetic bacteria and rejuvenating the thalli, and the growth and the propagation of the photosynthetic bacteria can be promoted by combining the illumination with the anaerobic condition. (2) Oxygen supply: the micro oxygen supply is an important condition for ensuring the dominant growth of the photosynthetic bacteria, can effectively inhibit the growth of anaerobic bacteria and sulfate reduction on one hand, and can also limit the excessive growth of aerobic bacteria, keep the proper growth of alkaline and aerobic bacteria, decompose macromolecular organic matters and create good environmental conditions for the growth of the photosynthetic bacteria on the other hand. The photosynthetic bacteria can keep advantageous growth in the reactor under the condition of micro-oxygen (0.5-1.0 mg/L). (3) And (3) recovering thalli: the reactor is constructed to facilitate collection and concentration of the photosynthetic bacteria.

The photosynthetic bacteria reactor reported at present mainly comprises a complete mixing suspension state reactor, an immersed biological contact fixed membrane reactor, a biological rotating disk reactor, a biological rotating cage reactor and the like, wherein the complete mixing type reactor and the immersed biological contact fixed membrane reactor have the problems of limited light penetration depth and insufficient photosynthetic bacteria light because of water depth obstruction; the biological rotating disc reactor has the problems of small amount of biological film attached to the disc surface, easy shedding, easy hybridization of thalli and the like; the biological rotating cage reactor is characterized in that a large amount of filler is filled in a cage, and photosynthetic bacteria also have the problem of insufficient illumination.

Disclosure of Invention

The invention aims to provide an immobilized photosynthetic bacteria biological rotating brush reactor for treating high-salt organic wastewater, which aims to solve the problems that the prior reactor in the background art is limited in illumination penetration depth due to water depth obstruction, insufficient in illumination of photosynthetic bacteria, easy in thallus hybridization and the like.

In order to achieve the purpose, the invention provides the following technical scheme: the immobilized photosynthetic bacteria biological rotating brush reactor for treating the organic wastewater with high salt content comprises a reaction tank and a rotating brush device, wherein the rotating brush device is composed of a motor, a transmission device, a coupler, a main shaft, a brush roller, a bearing, a sealing sleeve and a bearing seat, the reaction tank is a rectangular reinforced concrete structure, the brush roller is parallel to the wide edge of the reaction tank and is arranged on the water surface of the reaction tank, half of the brush roller is immersed in water, and half of the brush roller is exposed in the air, one end of the main shaft is connected with the motor through the bearing, the sealing sleeve, the coupler and the transmission device, the other end of the main shaft is connected with the bearing seat, the main shaft drives the brush roller to rotate, and a basic supporting seat is arranged at the bottoms of the motor and the bearing seat.

Preferably, the reaction tank is designed and calculated according to the sludge organic load or hydraulic retention time parameter of the relevant bioreactor, a plurality of reactors can be operated in parallel or in series, and the suggested size of a single reaction tank is as follows: length: 5000-10000 mm, width: 2000 ~ 3000mm, effective depth of water 2000 ~ 3000mm, the pond top superelevation: 400 mm.

Preferably, the outer diameter of the brush roller is 500-700 mm, the outer surface of the brush roller is implanted with polyurethane brush wires, the length of the brush roller is 150mm, and the outer diameter of the roller shaft is 200-400 mm.

Preferably, the length of the brush roller is flexibly determined according to the width of the reaction tank, a gap of 100mm is reserved between the brush roller and the tank wall, and the roll shaft of the brush roller is made of hard PVC with an iron pipe embedded in the center.

Preferably, the brush rollers are arranged in a plurality of groups in parallel in the reaction tank.

Preferably, the power of the motor is determined according to the length of the brush roller and is between 7.5 and 11 kw.

Compared with the prior art, the invention has the beneficial effects that: the biological rotating brush reactor overcomes the problem of insufficient illumination of the reactor photosynthetic bacteria reactor, improves the biomass of the photosynthetic bacteria, can carry out micro aeration through slow rotation, is convenient for thallus recovery, has key components of a brush roller driven by a speed regulating motor, and in the rotating process, the roller shows that a photosynthetic bacteria immobilized biomembrane can be formed on the brush roller, one half of the photosynthetic bacteria immobilized biomembrane is immersed in water, the other half of the photosynthetic bacteria immobilized biomembrane is exposed in the air and continuously replaced along with the rotation, and the photosynthetic bacteria can repeatedly receive illumination, absorb oxygen, degrade organic matters and maintain advantageous growth;

the reactor has the following advantages: 1. when the brush is exposed in the air, the microorganisms can absorb oxygen in the atmosphere to carry out pollutant metabolism activity, and the oxygen is brought into the sewage through the rotation of the rotary brush; when the brush enters water, the microorganisms degrade organic matters under the dark and micro-aerobic condition, thereby reducing the expense caused by mechanical aeration in the biological treatment process of wastewater;

2. photosynthetic bacteria on the disk surface brush can repeatedly utilize illumination in the air to grow and breed in the rotating process, and the problem of insufficient illumination absorption is solved.

3. The hairbrush is a polyurethane filament, is not easy to corrode and light in weight, and has a large specific surface area of the filament and a large amount of attached biomembranes;

4. when the biomass is saturated, the brush roller can be integrally taken down and replaced, and photosynthetic bacteria are centrifugally collected in a suitable high-speed centrifugal device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a connection structure of a main shaft and a brush roller according to the present invention;

FIG. 3 is a schematic diagram illustrating a brush roller status after successful start-up of the reactor according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the removal of COD from the high-salt organic wastewater-gelatin production wastewater by PSB in the embodiment of the invention.

In the figure: the device comprises a reaction tank 1, a rotating brush device 2, a motor 2-1, a transmission device 2-2, a coupler 2-3, a main shaft 2-4, a brush roller 2-5, a bearing 2-6, a sealing sleeve 2-7 and a bearing seat 2-8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the immobilized photosynthetic bacteria biological rotating brush reactor for treating high-salt organic wastewater in the embodiment comprises a reaction tank 1 and a rotating brush device 2, wherein the rotating brush device is composed of a motor 2-1, a transmission device 2-2, a coupler 2-3, a main shaft 2-4, a brush roller 2-5, a bearing 2-6, a sealing sleeve 2-7 and a bearing seat 2-8, the reaction tank 1 is a rectangular reinforced concrete structure, the brush roller 2-5 is parallel to the wide edge of the reaction tank 1 and is arranged on the water surface of the reaction tank 1, half of the brush roller 2-5 is immersed in water, half of the brush roller is exposed in air, one end of the main shaft 2-4 is connected with the motor 2-1 through the bearing 2-6, the sealing sleeve 2-7, the coupler 2-3 and the transmission device 2-2, the other end of the main shaft 2-4 is connected with a bearing seat 2-8, the main shaft 2-4 drives the brush roller 2-5 to rotate, and a basic supporting seat a is arranged at the bottom of the motor 2-1 and the bearing seat 2-8.

The size of the reaction cell 1 described in this example: length: 5000mm, width: 2000mm, effective water depth 2000mm, ultrahigh pool top: 400 mm.

The outer diameter of the brush rollers 2-5 in the embodiment is 500mm, the outer surfaces of the brush rollers are implanted with polyurethane brush wires, the length of the brush rollers is 150mm, and the outer diameter of the roller shafts is 200 mm.

In this embodiment, the brush rollers 2 to 5 are arranged in parallel 1 group in the reaction tank.

The working principle of the embodiment is as follows: the device is started, the motor 2-1 drives the brush roller 2-5 to rotate at a slow speed to carry out micro-aeration, in the rotating process, a photosynthetic bacteria immobilized biomembrane is formed on the surface of the brush roller 2-5, one half of the photosynthetic bacteria immobilized biomembrane is immersed in water, and the other half of the photosynthetic bacteria immobilized biomembrane is exposed in air and continuously replaced along with the rotation; when the brush rollers 2-5 are exposed in the air, the microorganisms can absorb oxygen in the atmosphere to carry out pollutant metabolism activity, and the oxygen is brought into the sewage through the rotation of the brush rollers 2-5; when the brush rollers 2-5 enter water, microorganisms degrade organic matters under the dark and micro-aerobic condition, so that the expense caused by mechanical aeration in the biological wastewater treatment process is reduced; the photosynthetic bacteria on the brush rollers 2-5 can repeatedly utilize illumination in the air to grow and reproduce in the rotating process, so that the problem of insufficient absorption of illumination is solved, and the preferential growth of the photosynthetic bacteria is facilitated; the hairbrushes of the hairbrush rollers 2-5 are polyurethane filaments which are not easy to corrode and light in weight, and the filaments have large specific surface area and can be attached with large amount of biomembranes; when the biomass is saturated, the brush rollers 2-5 can be integrally taken down and replaced, and photosynthetic bacteria are centrifugally collected in a proper high-speed centrifugal device.

Setting of reactor operating parameters in this example: 2-5 rotating speeds of the brush roller: the brush rollers 2-5 rotate at a low speed, the linear speed of the outer edge of the brush is less than 0.2m/s, the condition that the brush enters water and water splash is not caused is guaranteed, and the rotating speed range is as follows: 0.5 to 3 rpm. Dissolved oxygen: natural aeration is carried out by the aid of the rotating brush, and the micro-aerobic state of dissolved oxygen of 0.5-1.0 mg/L is guaranteed by adjusting the rotating speed. Illumination: the reactor adopts natural illumination in the daytime and daylight lamp illumination at night, and the illumination intensity is as follows: 1600 to 2000Lx.

Inoculating a bacterial liquid: the rhodospirillaceae photosynthetic bacteria liquid can be purchased through commercial channels, and the first inoculation amount is 10-20% (volume ratio);

starting the reactor: diluting the high-salt organic wastewater to COD (chemical oxygen demand) less than 500mg/L, injecting the diluted high-salt organic wastewater into a reaction tank to an effective water depth, starting a motor, inoculating a photosynthetic bacteria protobacteria liquid, culturing the solution for 3 days in still water, increasing the COD concentration of the wastewater to the original concentration according to a gradient, culturing the solution for 7-15 days at a low flow rate, and observing a reddish photosynthetic bacteria biofilm on a brush, wherein as shown in the following figure 3, the reactor can be considered to be started successfully.

Photosynthetic bacteria are collected and concentrated; after the rotating brush runs for a certain time, photosynthetic bacteria can be collected according to the requirement. The method is to replace a new rotating brush, the rotating brush taken down from the reactor is placed in a closed centrifugal device, and the photosynthetic bacteria can be centrifugally collected under the condition of 500-.

The effect of treating the high-concentration salt-containing organic wastewater in the reactor of the embodiment is verified:

the water sample is high-concentration salt-containing organic wastewater, which is taken from calcium hydrophosphate production wastewater of a certain gelatin company, and the original water quality of the calcium hydrophosphate is shown in table 1.

TABLE 1 quality of the adjusted phosphorus-calcium water

The photosynthetic bacteria (PSB) strain is from photosynthetic bacteria liquid fertilizer produced by certain biological bacteria fertilizer products Limited.

Starting a biofilm formation; the inoculation and addition proportion of PSB bacterial liquid is V_PSB/V_{Water (W)}＝1：9。

Firstly, diluting a raw water sample by 3 times for static culture, gradually increasing the adding proportion of phosphorus-calcium water after 3 days, and completely changing the raw water sample into phosphorus-calcium wastewater after film formation is successful.

Treatment effect; removal of COD: a parallel experiment was carried out in two sets of photosynthetic bacteria reactors PSB1 and PSB2, which were mutually identified as p₁、p₂The reaction results are shown in fig. 3.

FIG. 4 shows the PSB versus COD removal.

As can be seen from FIG. 4, p₁、p₂Two groups of parallel tests show that COD is continuously reduced along with the prolonging of Hydraulic Retention Time (HRT), the hydraulic retention time is 60 hours, the removal rate of COD can reach more than 85 percent, and the removal rate of COD can reach more than 92 percent after 84 hours, and P is obtained after 96 hours of reaction₁Discharging waterCOD was 189 mg. L^-1，P₂Is 203 mg.L^-1For high-concentration phosphorus-calcium wastewater, achieving the treatment effect is a breakthrough, and the photosynthetic bacteria have a better degradation effect on the phosphorus-calcium wastewater.

Tolerance of photosynthetic bacteria to chloride ions. As can be seen from Table 1, the concentration of chloride ions in the phosphorus-calcium wastewater is close to about 30000mg/L, but the photosynthetic bacteria do not inhibit the chloride ions in the treatment process, which indicates that the photosynthetic bacteria from the ocean can tolerate high concentration of Cl^-And the salt resistance is stronger.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.