CN205241459U - Multi -functional novel purification groove - Google Patents

Abstract

The utility model relates to a new multi-functional purification tank, which includes a tank body, a water inlet pipe and a water outlet pipe. The inside of the tank body is divided into an anaerobic zone, a first-level aerobic zone, a second-level aerobic zone, and a sedimentation zone in sequence through partitions. and the disinfection area, the water inlet pipe is installed on the left side wall of the tank and communicates with the anaerobic area, the outlet pipe is installed on the right side wall of the tank body and communicates with the disinfection area, and the disinfection area is set on the sedimentation area of the outlet pipe ; Biological filter beds are installed in the anaerobic zone, the primary aerobic zone and the secondary aerobic zone, and the filler of the biological filter bed is corrugated plate packing, and the width of the corrugated plate corrugation in the anaerobic zone is less than that of the two-stage aerobic zone The width of the corrugated plate corrugation in the zone; aeration devices are installed in the first-level aerobic zone and the second-level aerobic zone. The purification tank adopts one-stage anaerobic and two-stage aerobic. The wastewater first enters the anaerobic zone for acidification and hydrolysis, then enters the primary aerobic zone and the secondary aerobic zone, and finally discharges through the sedimentation zone and the disinfection zone. Using the device to treat the extracted benzoic acid wastewater can greatly increase the biodegradation rate and improve the treatment effect.

Description

Multifunctional new purification tank

technical field

The utility model relates to the technical field of sewage treatment, in particular to a new multifunctional purification tank used in a method for purifying a toluene-extracted phase biological filter bed of benzoic acid production wastewater.

Background technique

Benzoic acid, also known as benzoic acid, is the main raw material for the production of food preservative sodium benzoate. Benzoic acid is mainly produced and prepared under the catalysis of organic acid metal salts, and there are also organic compounds such as benzaldehyde and benzyl alcohol as by-products. After the high-concentration organic wastewater produced in the production process of benzoic acid is extracted with toluene, the wastewater still contains 60-100mg/L of benzoic acid and benzyl alcohol; due to the soluble properties of these organic substances, they will remain in the water, resulting in a COD concentration higher than 20000mg/L, which belongs to high-concentration organic wastewater, so it is difficult to directly treat it with biodegradable methods. At present, the commonly used treatment methods for this type of wastewater include macroporous resin adsorption and extraction.

In recent years, the inventors of the present invention have devoted themselves to the research work of processing this type of high-concentration organic wastewater. The research results show that the toluene extraction technology combined with the benzoic acid production process has a better pretreatment effect. This technology can not only effectively extract and recover valuable benzoic acid, benzyl alcohol and benzaldehyde in wastewater; at the same time, after two extractions, benzoic acid, Benzyl alcohol and benzaldehyde concentrations were significantly reduced to 65.9, 62.3 and 0 mg/L. Although the toluene extraction process greatly reduces the concentration of organic pollutants in the wastewater, the wastewater still cannot be discharged up to the standard, and subsequent biochemical treatment must be carried out.

In the prior art, there is no relevant literature record about the biodegradation of benzoic acid wastewater after toluene extraction by using a self-made bioreactor.

Utility model content

The purpose of the utility model is to make up for the deficiencies of the prior art, to provide a kind of benzoic acid wastewater and domestic sewage to be deployed, so that the water index reaches the standard for the benzoic acid production wastewater toluene extraction residual phase biological filter bed purification method A new multifunctional septic tank.

The purpose of this utility model is achieved by the following technical means:

A new type of multifunctional purification tank, characterized in that: it includes a tank body, an inlet pipe and an outlet pipe, and the inside of the tank body is divided into an anaerobic zone, a first-level aerobic zone, a second-level aerobic zone, and a sedimentation zone by partitions. and the disinfection area, the water inlet pipe is installed on the left side wall of the tank and communicates with the anaerobic area, the outlet pipe is installed on the right side wall of the tank body and communicates with the disinfection area, and the disinfection area is set on the sedimentation area of the outlet pipe ; Biological filter beds are installed in the anaerobic zone, the primary aerobic zone and the secondary aerobic zone, and the filler of the biological filter bed is corrugated plate packing, and the width of the corrugated plate corrugation in the anaerobic zone is less than that of the two-stage aerobic zone The width of the corrugated plate corrugation in the zone; aeration devices are installed in the first-level aerobic zone and the second-level aerobic zone.

Moreover, the anaerobic zone and the primary aerobic zone, between the primary aerobic zone and the secondary aerobic zone, and between the secondary aerobic zone and the sedimentation zone are all connected by reverse water structures.

And, between the described anaerobic zone and the primary aerobic zone, the anti-water structure between the primary aerobic zone and the secondary aerobic zone is an anti-water tank structure with an opening at its lower end; the secondary aerobic zone and the secondary aerobic zone The anti-water structure between the sedimentation areas is in the form of openings at the lower ends of the partitions.

Moreover, the bottom of the settling area is made into an inclined surface.

Moreover, there are gaps between the biological filter bed and the bottom of the tank body.

Moreover, the aeration device includes an aeration tube, a gas valve and an air pump, and an aeration tube is arranged in the primary aerobic zone and the secondary aerobic zone, and the upper ends of the two aeration tubes are connected to the air pump, and each An independent gas valve is installed on each aeration pipe or two aeration pipes share a gas valve.

Advantage and positive effect of the present utility model are:

1. This purification tank adopts the principles of fluid mechanics and reaction kinetics, and adopts one-stage anaerobic and two-stage aerobic. Wastewater first enters the anaerobic zone for acidification and hydrolysis, then enters the first-level aerobic zone and the second-level aerobic zone to increase the biodegradation rate, and finally is discharged through the sedimentation zone and disinfection zone.

2. In this purification tank, the anaerobic is in the front and the aerobic is in the back, which can reduce energy consumption and reduce the load in the aerobic zone, so that the concentration of pollutants in the aerobic zone is relatively low and stable. The mixed benzoic acid wastewater entering the purification tank relies on the potential energy difference between the zones to form a natural flow without additional power. The plug flow flow mode in the anaerobic zone inhibits the flow of high-concentration wastewater into the low-concentration zone; the aerobic zone realizes full mixed flow under aeration and stirring, and microorganisms degrade pollutants under stable conditions; the form of biological filter beds is used between the zones , Increase the microbial biomass per unit volume, reduce the amount of sludge produced, and improve the impact resistance.

3. The purification tank adds fillers to the anaerobic, first-level aerobic and second-level aerobic areas, so that microorganisms can be fixed and attached to the surface to form a biological filter bed, so as to treat the extracted benzoic acid wastewater, which is beneficial to Improve the effect of biological treatment.

4. The benzoic acid wastewater extracted from p-toluene is biodegraded in a self-made bioreactor. Compared with the influent concentration, the concentration of BOD ₅ , COD, NH4+-N, benzoic acid and benzyl alcohol after biodegradation treatment is significantly reduced. It is proved that the biological filter bed has the removal effect on the extracted benzoic acid wastewater.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

The embodiments of the present utility model are described in detail below in conjunction with the accompanying drawings; it should be noted that the present embodiments are descriptive, not restrictive, and cannot limit the protection scope of the present utility model with this.

A new type of multifunctional purification tank, including a tank body 13, a water inlet pipe 1 and an outlet pipe 12, the tank body is made of plexiglass, and the inside of the tank body is divided into an anaerobic zone 2 and a first-level aerobic zone by a partition 9 in turn 6. Secondary aerobic zone 7, sedimentation zone 10 and disinfection zone 11. The water inlet pipe is installed on the left side wall of the tank and communicated with the anaerobic zone. The bottom of the sedimentation zone is made into an inclined surface, and the disinfection zone is set on the outlet pipe On the sedimentation area of the part, the outlet pipe is installed on the right side wall of the tank and communicated with the disinfection area.

Between the anaerobic zone and the first-level aerobic zone, between the first-level aerobic zone and the second-level aerobic zone, between the second-level aerobic zone and the sedimentation zone are all connected by reverse water structure 3. That is: between the anaerobic zone and the first-level aerobic zone, the reverse water structure between the first-level aerobic zone and the second-level aerobic zone is a reverse-water tank structure with an opening at its lower end; between the second-level aerobic zone and the sedimentation zone The anti-water structure between them is in the form of openings at the lower ends of the partitions.

The anaerobic zone, the primary aerobic zone and the secondary aerobic zone are all equipped with a biological filter bed 5, and there is a gap between the biological filter bed and the bottom of the tank body. The filler of the biological filter bed is a corrugated plate filler; the biological filter bed uses corrugated plates of different specifications as fillers, and the width of the corrugated plates in the anaerobic zone is smaller than the width of the corrugated plates in the two-stage aerobic zone. That is: the anaerobic zone adopts corrugated plates with fine corrugations, and the aerobic zone adopts corrugated plates with coarse corrugations.

Aeration devices are installed in both the primary aerobic zone and the secondary aerobic zone. The aeration device includes an aeration pipe 4, a gas valve and an air pump 8. An aeration pipe is arranged in the primary aerobic zone and the secondary aerobic zone. The upper ends of the two aeration tubes are connected to the air pump. An independent gas valve is installed on each tube or two aeration tubes share one gas valve.

Using this device to purify the toluene raffinate phase biological filter bed of benzoic acid production wastewater is as follows:

⑴. Deploying benzoic acid production wastewater toluene raffinate phase wastewater and domestic sewage to form a mixed solution;

The benzoic acid production wastewater toluene raffinate phase wastewater is the benzoic acid wastewater after twice extraction with toluene, and the volume ratio Vb:Vs of the benzoic acid production wastewater toluene raffinate phase wastewater to domestic sewage is 1:10-3:2 , such as 1:4, 2:3, 1:1, etc.;

⑵. Send the prepared mixed solution into the multi-functional new purification tank. The mixed solution first undergoes one-stage anaerobic acidification hydrolysis treatment, then two-stage aerobic treatment, and finally precipitation disinfection treatment, and finally the multi-functional new purification tank Discharge in the middle is to complete the purification process. The purification method adopts the method of continuous water inflow.

Claims (6)

1. a Multifucntional purification tank, is characterized in that: comprise cell body, water inlet pipe and outlet pipe, grooveThe inside of body is separated into anaerobic zone, one-level aerobic zone, secondary aerobic zone, settling zone and sterilization successively by dividing plateDistrict, water inlet pipe is arranged on the left side wall of cell body and is communicated with anaerobic zone, and outlet pipe is arranged on the right side wall of cell bodyGo up and be communicated with sterile zones, sterile zones is arranged on the settling zone at outlet pipe position; Anaerobic zone, one-level are aerobicIn district and secondary aerobic zone, bacteria bed is all installed, the filler of described bacteria bed is corrugated plate packing, and detestsThe width of oxygen district corrugated plating ripple is less than the width of two-stage aerobic district corrugated plating ripple; At one-level aerobic zone and secondaryAerator is all installed in aerobic zone.

2. a kind of Multifucntional purification tank according to claim 1, is characterized in that: described detestsBetween oxygen district and one-level aerobic zone, between one-level aerobic zone and secondary aerobic zone, secondary aerobic zone and settling zone itBetween all adopt turn one's coat structure connect.

3. a kind of Multifucntional purification tank according to claim 2, is characterized in that: described detestsBetween oxygen district and one-level aerobic zone, the structure of turning one's coat between one-level aerobic zone and secondary aerobic zone is to open in its lower endThe anti-sink structure of mouth; The structure of turning one's coat between secondary aerobic zone and settling zone is the lower ending opening shape of its dividing plateFormula.

4. a kind of Multifucntional purification tank according to claim 1, is characterized in that: described is heavyInclined plane is made in the bottom in shallow lake district.

5. a kind of Multifucntional purification tank according to claim 1, is characterized in that: described lifeBetween thing filter bed and cell body bottom, all there is gap.

6. a kind of Multifucntional purification tank according to claim 1, is characterized in that: described exposes to the sunDevice of air comprises aeration tube, gas valve and air pump, all arranges one and expose to the sun in one-level aerobic zone and secondary aerobic zoneTracheae, the upper end of these two aeration tubes connects air pump jointly, and an independently gas is all installed on each aeration tubeValve or two aeration tubes share a gas valve.