CN203065238U - Novel embedded integrated flow guiding biological aerated filter - Google Patents

Abstract

The utility model relates to a novel embedded integrated flow guiding biological aerated filter and belongs to the field of environmental protection equipment. The novel embedded integrated flow guiding biological aerated filter comprises a hydrolytic acidification region, a convection contact oxidation region, a flow guiding sedimentation recirculation region, an upflow aeration biological filtering region and a sludge recirculation system. The novel embedded integrated flow guiding biological aerated filter has the beneficial effects that hydrolysis and acidification reactions are carried out on microorganisms in water under anoxic condition (dissolved oxygen is less than 0.5mg/L), and macromolecule organic matters in water are decomposed into micromolecule organic matters easy to treat, so that biochemical property of sewage is improved; and mud-water mixture subjected to aerobic nitrification treatment returns to the hydrolytic acidification region, and ammonia nitrogen in water is converted into nitrogen under the action of denitrification of anaerobic bacteria at the moment, so that effluent quality is greatly enhanced.

Description

New buried integrated diversion biological aerated filter

technical field

The utility model relates to a new buried integrated diversion aerated biological filter tank, which belongs to the field of environmental protection equipment.

Background technique

The buried integrated diversion biological aerated filter is a process that allows sewage to complete aeration-sedimentation-secondary aeration-secondary sedimentation in the same treatment tank, and solves the process of other sewage treatment that requires four pools to complete process. Especially under the condition of continuous water inflow, the gap aeration of water inflow-aeration-sedimentation-water outflow is realized. Its advantages are more prominent than other sewage treatment methods, and the treatment effect is particularly remarkable. The buried integrated diversion aerated biological filter is the AB method, the SBR method, the A ² O method, the contact oxidation method, and the double exposure and double sedimentation. Replacement products for sewage treatment equipment such as aeration. According to the use situation, it is found that the removal efficiency of the equipment for COD, BOD, SS and other methods is high, but the removal rate of ammonia nitrogen is low.

The main structure of the equipment includes: convective contact oxidation zone, diversion sedimentation reflux zone, upward flow aeration biological filter zone, etc.

Contents of the invention

This project is to add a cylindrical hydrolysis and acidification zone on the basis of the existing buried integrated diversion aerated biological filter. The sewage undergoes hydrolysis and acidification reactions in the hydrolysis and acidification tank 3, and the macromolecular organic matter in the water is decomposed. Improve the biodegradability of sewage for easy-to-handle small molecule organic matter; at the same time, a set of sludge return system is added to return part of the mud-water mixture at the bottom of the diversion settlement area to the hydrolysis and acidification area.

The new buried integrated diversion aerated biological filter is characterized by: it consists of a hydrolytic acidification zone, a convective contact oxidation zone, a diversion sedimentation reflux zone, an upward flow aerated biological filter zone and a sludge return system; Enter the hydrolytic acidification tank, the convective contact oxidation tank, the sludge sedimentation concentration tank, and the upflow biological aerated filter in order to realize sewage purification.

The novel buried integrated diversion biological aerated filter is characterized in that: the sludge return system is composed of a sludge return pump, a sludge discharge pipe and a sludge return pipe; the sludge flowing out of the sludge return pump , part of it is returned to the hydrolytic acidification zone, and the other part is discharged into the sludge digester.

The beneficial effect of this project is that microorganisms in water undergo hydrolysis and acidification reactions under anoxic conditions (dissolved oxygen is less than 0.5mg/L), decompose macromolecular organic matter in water into small molecular organic matter that is easy to handle, and improve the biodegradability of sewage; at the same time The muddy water mixture treated by aerobic nitrification is returned to the hydrolytic acidification area, where the ammonia nitrogen in the water is converted into nitrogen through the denitrification of anaerobic bacteria, which greatly improves the quality of the effluent.

Description of drawings

The accompanying drawing is a cross-sectional view of the new buried integrated diversion biological aerated filter. In the figure, it can be seen that the water inlet pipe 1, the water distribution device 2, the hydrolysis acidification tank 3, the convective contact oxidation tank 4, the deflector 5, the upward flow biological aerated filter tank 6, the water outlet pipe 7, the sludge sedimentation concentration tank 8, the drainage Mud pipe 9, sludge return pump 10, sludge return pipe 11, Roots blower 12, air intake pipe 13, aeration device 14, light biological carrier 15, inspection hole 16, sludge outlet 17.

Detailed ways

As shown in the attached picture,

When the new buried integrated diversion aerated biological filter works normally, the sewage enters the hydrolytic acidification tank 3 evenly from the water inlet pipe 1 through the water distribution device 2, and the light biological carrier 15 is installed in the hydrolytic acidification tank 3, and the sewage Hydrolysis and acidification reactions take place in the hydrolysis acidification pool 3, which decomposes the macromolecular organic matter in the water into easy-to-handle small molecular organic matter, improves the biodegradability of the sewage, and completes the purpose of the first-stage treatment;

The effluent from the hydrolytic acidification tank enters the convection contact oxidation tank 4, which is also equipped with a light biological carrier 15, and the sewage fully realizes convection contact, biological oxidation and aeration filtration in the flow contact oxidation tank 4, and the aerobic bacteria With the filler as the carrier, the organic matter in the sewage is used as the food material, and the organic matter in the sewage is decomposed into inorganic salts. Most of the organic matter in the raw sewage is degraded and purified here, so as to achieve the purpose of completing the second stage treatment;

After the sewage is separated from sludge and water in the sludge settlement concentration tank 8, under the action of the deflector 5, it enters the upward-flowing biological aerated filter 6 from bottom to top, and the upward-flowing biological aerated filter 6 also Equipped with a light biological carrier 15, the sewage is fully aerated here to realize biological oxidation and biological filtration, and the clear effluent after aeration and filtration flows out through the outlet pipe 7, so that the sewage can achieve the purpose of completing the third stage treatment;

During the treatment process of the sewage in the upflow biological aerated filter 6, some sludge will also be produced, and the sludge will sink into the sludge settling and concentrating tank 8 through the gap between the deflector 5 and the equipment under the action of gravity , to carry out concentration and sedimentation, so that two aeration tanks share one sedimentation tank;

The sludge return system consists of a sludge return pump, a sludge discharge pipe and a sludge return pipe. A sludge discharge device 9 is provided at the bottom of the sludge settling and concentration tank 8, and the mud-water mixture after sedimentation and concentration is lifted by the sludge return pump 10, passes through the sludge discharge device 9, and part of it is discharged into the sludge through the sludge outlet 17 The other part of the digester enters the sludge return pipe 11 and flows back to the hydrolytic acidification tank 3, where the ammonia nitrogen in the water is converted into nitrogen through the denitrification of the anaerobic flora, and released into the air to achieve the purpose of removing ammonia nitrogen;

After being treated by the new buried integrated diversion aerated biological filter, the sewage automatically flows into the subsequent disinfection basket, and the disinfection can be carried out with slow-release chlorine tablets.

The manhole 16 is designed for personnel to enter and exit during manufacture and maintenance.

Claims (2)

1. novel buried integrated water conservancy diversion BAF is characterized in that: be made up of acidication district, convection current catalytic oxidation district, water conservancy diversion sedimentation recirculating zone, upward flow biological aerated filter district and mud return-flow system; Sewage enters hydrolysis acidification pool, convection current contact-oxidation pool, sludge settling concentration basin, Up-flow Biological Aerated Filter successively, realizes sewage purification.

2. novel buried integrated water conservancy diversion BAF according to claim 1 is characterized in that: the mud return-flow system has sludge reflux pump and shore pipe and mud return line to constitute; By the mud that sludge reflux pump flows out, a part is back to the acidication district, and another part effluxes and enters sludge digestion tank.