CN207659270U - A kind of Dredged bed mud integration residual water treatment purification tank - Google Patents

Abstract

The utility model relates to an integrated residual water treatment purification tank for dredging bottom mud. The utility model belongs to the technical field of sewage treatment. An integrated residual water treatment purification tank for dredging sediment, which is characterized in that: the integrated residual water treatment purification tank for dredging sediment is made of plexiglass, and the interior is divided into an aerobic zone, a first-stage anaerobic zone, Oxygen zone, secondary anaerobic zone and sedimentation zone, aerobic zone, primary anaerobic zone, secondary anaerobic zone and sedimentation zone have height difference between water inlet and outlet, aerobic zone is equipped with aeration device, good The oxygen zone, the primary anaerobic zone, the secondary anaerobic zone and the sedimentation zone are all equipped with temperature control devices. The utility model is aimed at the characteristics of high ammonia nitrogen and low organic matter in the residual water after most of the dredged sediment is dehydrated. It is reasonably designed, has high processing efficiency, low energy consumption, increases the processing capacity, improves the processing efficiency, and reduces the processing cost. It is suitable for being widely used in the treatment of residual water of dredged sediment after being dewatered by the dewatering field.

Description

An integrated residual water treatment purification tank for dredging sediment

technical field

The utility model belongs to the technical field of sewage treatment, in particular to an integrated residual water treatment purification tank for dredging bottom mud.

Background technique

Environmental dredging is a pollution source control technology in lakes. It is developed on the basis of dredging projects such as waterways and river ports. It aims to remove polluted sediment in lakes and create conditions for the restoration of lake aquatic ecosystems. It also requires Coordinate with the lake comprehensive consolidation plan. During the dredging process, the dredged sediment will produce a large amount of tail water after reduction treatment.

Environmental protection dredging tail water contains nitrogen, phosphorus, organic pollutants and a small amount of heavy metal pollutants. Most of these pollutants are attached to suspended particles and discharged into the receiving water body along with the tail water, which will cause secondary pollution of the receiving water body. These suspended particles have a small specific gravity and are difficult to settle and remove in a short time.

The current environmental protection dredging tail water treatment process mainly includes: (1) Increase the hydraulic retention time of the tail water, the effective settlement water depth, and the flow velocity of the tail water through the extension design of the flow path of the sedimentation tank, enhance the gravity settlement of the suspended matter itself, and strengthen the sedimentation efficiency of the particles in the sedimentation tank , to achieve the purpose of removing suspended solids and other pollutants; (2) By adding chemical flocculation agents to enhance the settling efficiency of particulate matter, the pollutants will quickly attach to the particulate matter and flocculate and deposit at the bottom of the sedimentation tank, and the upper layer of clear water will be discharged into the receiving tank Water body. These processes have certain shortcomings in practical application: 1. The large amount of water treatment leads to excessive dosage of chemical flocculants, which easily causes secondary pollution; 2. It is difficult to adjust the dosage of chemical agents according to the water quality of tail water , The effluent water quality is unstable.

Contents of the invention

The utility model provides an integrated residual water treatment purification tank for dredging bottom mud in order to solve the technical problems in the known technology.

The purpose of this utility model is to provide a dredging bottom with short-range nitrification combined with anaerobic ammonium oxidation process, which changes the traditional biological process of denitrification, phosphorus removal, nitrification and denitrification, and has the characteristics of shortening reaction time, saving energy, and improving treatment efficiency. Mud integrated residual water treatment purification tank.

The utility model provides an integrated processing device with good processing effect, low processing cost, high efficiency and energy saving. The purification tank is made of plexiglass. The interior is divided into an aerobic zone, a primary anaerobic zone, a secondary anaerobic zone and a sedimentation zone through a partition. The aerobic zone is equipped with an aeration device, and several areas are installed There is a temperature control device. The equipment is equipped with a water inlet and a water outlet. There is a height difference between the water inlet and the water outlet. The sewage entering the reactor relies on the potential energy difference between each zone to enter the next reaction zone from the previous reaction zone, thus forming a natural flow. Each purification area is connected to artificially cultivated biofiltration membranes. The activated sludge in the aerobic area is composed of nitrifying bacteria activated sludge, and the activated sludge in the anaerobic area is anaerobic ammonia oxidizing bacteria artificially cultivated in a closed container in the early stage. activated sludge. The biofiltration membrane is composed of artificially cultivated activated sludge and organic filler, which is a fixed bed filler.

The technical scheme adopted by the integrated residual water treatment purification tank for dredging sediment of the utility model is:

An integrated residual water treatment purification tank for dredging sediment, which is characterized in that: the integrated residual water treatment purification tank for dredging sediment is made of plexiglass, and the interior is divided into an aerobic zone, a first-stage depletion zone, Oxygen zone, secondary anaerobic zone and sedimentation zone, aerobic zone, primary anaerobic zone, secondary anaerobic zone and sedimentation zone have height difference between water inlet and outlet, aerobic zone is equipped with aeration device, good The oxygen zone, the primary anaerobic zone, the secondary anaerobic zone and the sedimentation zone are all equipped with temperature control devices.

The integrated residual water treatment purification tank for dredging sediment of the utility model can also adopt the following technical scheme:

The integrated residual water treatment purification tank for dredged sediment is characterized in that: the aerobic zone, the first-level anaerobic zone, the second-level anaerobic zone and the sedimentation zone are all connected to the biofiltration membrane filler, and the activated sludge in the aerobic zone is It is composed of nitrifying bacteria activated sludge, and the activated sludge in the primary anaerobic zone and the secondary anaerobic zone is anaerobic ammonia oxidizing bacteria activated sludge.

The integrated residual water treatment purification tank for dredged sediment is characterized in that the biofiltration membrane is composed of activated sludge and organic filler, which is a fixed bed filler.

The integrated residual water treatment purification tank for dredging sediment is characterized in that the diameter of the filler is 0.8-1.2cm, the length is 0.8-1.5cm, the porosity of the filter bed is 70-90%, and the volume of the filler is respectively aerobic zone 70-80% of the volume, 50-62% of the volume of the primary anaerobic zone and the secondary anaerobic zone.

The advantages and positive effects that the utility model has are:

Compared with the prior art, this utility model changes the nitrification and denitrification reaction process of traditional biological denitrification, and adopts short-range nitrification combined with anaerobic ammonia The oxidation reaction process shortens the reaction process, only needs to aerate in the aerobic zone, and reduces the amount of aeration to save energy. The anaerobic reaction process does not require additional carbon sources, and reduces the input of organic matter to save costs. The biofilm fixed bed reactor is used to avoid the loss of activated sludge flowing with the water body, effectively maintain the biomass concentration of activated sludge, and improve the treatment efficiency. The denitrification test of the purification tank shows that the ammonia nitrogen removal rate of the new purification tank is the highest. It can reach 70%.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the integrated residual water treatment purification tank for dredging sediment of the utility model.

In the figure, 1. water inlet, 2. aerobic zone, 3. anaerobic zone, 4. anaerobic zone, 5. air pump, 6. effluent, 7. sedimentation zone.

Detailed ways

In order to further understand the utility model content, characteristics and effects of the present utility model, the following examples are given hereby, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Refer to accompanying drawing 1.

Example 1

An integrated residual water treatment purification tank for dredging sediment, made of plexiglass, the interior is divided into an aerobic zone, a primary anaerobic zone, a secondary anaerobic zone, and a sedimentation zone connected in sequence through a partition, and the aerobic zone There is a difference in height between the water inlet and outlet of the zone, the first-level anaerobic zone, the second-level anaerobic zone, and the sedimentation zone. The aerobic zone is equipped with an aeration device, and the aerobic zone, the first-level anaerobic zone, and the second-level anaerobic zone And the precipitation area is equipped with temperature control device.

Each purification area is connected to the artificially cultivated biofiltration membrane filler. The activated sludge in the aerobic area is composed of nitrifying bacteria activated sludge, and the activated sludge in the anaerobic area is the anaerobic ammonium oxidation artificially cultivated in a closed container in the early stage. Bacterial activated sludge.

The biofiltration membrane is composed of artificially cultivated activated sludge and organic filler, which is a fixed bed filler. In order to increase the surface area, strength and corrosion resistance of the filler, this experiment chooses Filler (diameter is 1cm, length is 1.1cm, filter bed porosity is 80%) is used as the filler in the purification tank. According to the filling volume ratio of the large-scale purification tank in the demonstration project, the filling volume in the small-scale purification tank is 74% and 58% of the volume of the aerobic zone and anaerobic zone, respectively.

The concrete implementation process of this embodiment:

The purification tank includes aerobic zone, primary anaerobic zone, secondary anaerobic zone and sedimentation zone. Influent water enters from the aerobic zone, and through the aerobic nitrification process of nitrifying bacteria in the aerobic zone, ammonia nitrogen is converted into Nitrite nitrogen and eliminate phosphorus, organic matter and some heavy metals. When the generated nitrite nitrogen flows through the anaerobic zone, it is converted into nitrogen gas by anammox bacteria under anaerobic conditions, and further utilizes the remaining water in the water body. phosphorus and some heavy metals to improve the treatment effect. When the influent flow rate is 1L/h, the wastewater has a higher effective water flow volume ratio in the reaction tank, which is conducive to the full mixing of microorganisms and wastewater, improving the impact resistance, treatment efficiency and effluent quality, and is conducive to the relative Stablize. DO is adjusted by controlling the amount of air aeration, and the aerobic zone is generally maintained at about 0.8-1.2mg/L. The anaerobic zone is 0. The pH value is basically maintained at around 8.0-8.5.

This embodiment adopts short-range nitrification combined with anaerobic ammonia oxidation process, which changes the traditional biological nitrogen and phosphorus removal nitrification and denitrification process, and has positive effects such as shortening reaction time, saving energy, and improving efficiency.

Claims (4)

1. a kind of Dredged bed mud integration residual water treatment purification tank, it is characterized in that：Dredged bed mud integration residual water treatment purification tank It is made of organic glass, inside is divided by partition board is sequentially connected the aerobic zone connect, level-one anaerobic zone, secondary anaerobic area and precipitation Area, aerobic zone, level-one anaerobic zone, secondary anaerobic area and settling zone inlet and outlet there is difference in height, aerobic zone to be equipped with Aerator, aerobic zone, level-one anaerobic zone, secondary anaerobic area and settling zone are mounted on temperature regulating device.

2. Dredged bed mud integration residual water treatment purification tank according to claim 1, it is characterized in that：Aerobic zone, level-one are detested Oxygen area, secondary anaerobic area and settling zone access biological filter membrane filler, and aerobic zone activated sludge is by nitrobacteria activated sludge group At level-one anaerobic zone, secondary anaerobic area activated sludge are then anaerobic ammonia oxidizing bacteria activated sludge.

3. Dredged bed mud integration residual water treatment purification tank according to claim 2, it is characterized in that：Biological filter membrane is by activity Sludge is formed with organic filler, for fixed bed fillers.

4. Dredged bed mud integration residual water treatment purification tank according to claim 2 or 3, it is characterized in that：Filler is a diameter of 0.8-1.2cm, length 0.8-1.5cm, filter bed porosity are 70-90%, and packing volume is respectively the 70- of aerobic zone volume 80%, level-one anaerobic zone, secondary anaerobic area volume 50-62%.