Treatment device for household garbage press filtrate by adopting A-SBR (Analogue-Sequencing Batch Reactor) technology

Abstract

The utility model belongs to the technical field of household garbage treatment, and particularly relates to a treatment device for household garbage press filtrate by adopting an A-SBR (Anaerobic-Sequencing Batch Reactor) technology, which is characterized in that an improved anoxic tank, namely an A tank is combined with an SBR process, so that the denitrification process requirement of the SBR tank is enhanced, the dilution treatment, oxygen release and sludge discharge of the high-concentration garbage press filtrate can be structurally realized, and the water quality characteristic is combined; calcium hydroxide is specially adopted for pH value adjustment and coagulating sedimentation, meanwhile, sludge treatment of a stacked screw machine is preposed, the coagulating sedimentation and filter pressing efficiency is improved, and finally the process stability is guaranteed. According to the utility model, the back-end process is used in front, the pretreatment is enhanced, the process section is reduced, the volume reduction of a biochemical unit is realized, the cost investment is directly reduced, and the pollutant retention time is reduced, the mixing and settling and filter pressing efficiency is improved, the process advantages of the SBR pool are exerted, and the production cost is reduced. And the stability of the whole system is further guaranteed by synchronously utilizing an improved anoxic tank reinforcing short plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic sewage treatment technical field, concretely is a kind of treatment device for domestic garbage filter liquor using A-SBR technology. BACKGROUND

[0002] With the development of city and people's life diversification, the daily production of domestic garbage is increasing year by year, and garbage compression transfer stations have been built in various towns to improve the efficiency of garbage transfer. Due to the current garbage classification control measures and the objective situation of residents' awareness, it needs time to completely implement the classification work. Combined with the current situation and the engineering done by investigation, the oil-containing kitchen garbage in catering industry is strictly controlled, but there are still leftovers or fruit peels mixed in domestic garbage, and the types of fruit peels change with the seasons, so the water quantity and quality of filter liquor also change, therefore, it is necessary to find a process that can respond to load impact, and too many dangerous chemicals should not be used, and under the premise of ensuring the safety of garbage compression station staff, the treatment of high-concentration garbage filter liquor is realized. SUMMARY

[0003] The utility model aims at providing a kind of treatment device and method for domestic garbage filter liquor based on A-SBR technology, which links SBR pool process with A pool, i.e. improved anoxic tank, to meet the demand of denitrification process and realize dilution, oxygen release and sludge discharge from structure; combined with water quality characteristics, calcium hydroxide is used for pH adjustment, i.e. coagulation and sedimentation, and sludge treatment of stacking screw machine is preposed, to improve coagulation and sedimentation and filter efficiency by A pool sludge discharge, finally to ensure process stability, reduce capacity and consumption with purpose, and reduce investment.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of treatment device for domestic garbage filter liquor using A-SBR technology, including garbage compression truck for filter domestic garbage, the garbage compression truck is collected after filter filter liquor or washing waste water in life by channel, residue collection pit and sieve are equipped in the channel, the channel is connected with rotary drum grating machine, the rotary drum grating machine is connected with coagulation and sedimentation tank, the coagulation and sedimentation tank is connected with stacking screw machine, the stacking screw machine is connected with accident regulating pool, the accident regulating pool is connected with improved anoxic tank, the improved anoxic tank is connected with SBR pool and coagulation and sedimentation tank respectively, the SBR pool is connected with disinfection tank, and filter liquor is discharged after reaching standard by chlorine disinfection of disinfection tank.

[0005] Further, the SBR pool and the improved anoxic tank are connected by a reflux pipe to form a nitrification liquid reflux system, and the improved anoxic tank is provided with an oxygen release flow guide cylinder; the SBR pool and the accident regulating pool are connected to form a dilution liquid reflux device.

[0006] Furthermore: the coagulation lifting tank is divided into compartments that serve as backups for each other; calcium hydroxide coagulant is added to the coagulation lifting tank; and the coagulation lifting tank is also equipped with a lifting pump and a central guide tube.

[0007] Furthermore, the screw press is equipped with a bypass pipe and valves.

[0008] Furthermore, the screen buckets, rotary drum bar screens, and screw presses within the channel are all used to collect sludge and discharge it into garbage compactors for centralized transportation.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This invention combines an improved anoxic tank (A tank) with the SBR process, which not only strengthens the denitrification requirements of the SBR tank, but also structurally enables the dilution treatment of high-concentration landfill filtrate. Considering the characteristics of the water quality, calcium hydroxide is specially used for pH adjustment and coagulation sedimentation. At the same time, the sludge treatment of the screw press is pre-positioned, and the sludge discharge from the A tank is used to improve the efficiency of coagulation, sedimentation and filtration, ultimately ensuring process stability.

[0011] From an investment perspective, this invention fully considers the characteristics of each process unit, bringing the downstream processes forward, enhancing pretreatment while reducing process steps, and simultaneously reducing the volume of the biochemical unit, directly lowering cost input. From a process stability perspective, this invention reduces pollutant residence time, improves sedimentation and filtration efficiency, leverages the advantages of the SBR process, and simultaneously utilizes an improved anoxic tank to address shortcomings, further ensuring the stability of the entire system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This utility model discloses a treatment device for municipal solid waste filtrate using A-SBR technology. The "SBR" tank process is often used to deal with water quality under heavy load shocks, but its denitrification capacity is limited. Therefore, this utility model specially sets up an "A" tank, namely an improved anoxic tank, to be linked with it, which not only meets the requirements of the denitrification process, but also realizes dilution, oxygen release and sludge discharge from the structure.

[0015] Figure 1The overall framework diagram of this utility model includes a garbage compactor truck for filtering municipal solid waste. The garbage compactor truck collects the filtrate or domestic flushing wastewater through a channel connected to a rotary drum bar screen. The outlet of the rotary drum bar screen is connected to a coagulation booster tank, which is connected to a screw press. The outlet of the screw press is connected to an emergency regulating tank, which is connected to a modified anoxic tank. The modified anoxic tank is connected to an SBR tank. The outlet of the SBR tank is connected to the emergency regulating tank to form a diluent return system. The diluent from the emergency regulating tank, along with the returned diluent, enters the modified anoxic tank and then the SBR tank. The SBR tank is connected to a disinfection tank, where chlorination disinfection is performed to achieve the required standards before discharge.

[0016] The SBR tank is equipped with a return pipe and is connected to the modified anoxic tank through a nitrification liquid return pump to form a nitrification liquid return system. In combination with the system's denitrification and sludge discharge requirements, when the SBR tank is in the normal aeration stage, the return liquid is used for denitrification, and when the SBR tank is in the sedimentation stage, the return liquid is used for sludge discharge. The return ratio is controlled at 100~300%.

[0017] Priority: This device is also equipped with an online dissolved oxygen monitoring device to monitor the dissolved oxygen level in the modified anoxic tank. During the operation of the modified anoxic tank, the dissolved oxygen is controlled at 0.2~0.5mg / L and the pH is controlled at 7.5. In the SBR tank, the dissolved oxygen level during the aeration stage is controlled at 3±1mg / L and the pH is controlled at 7, in conjunction with the process section control.

[0018] Priority features: This device is also equipped with a dosing device. Calcium hydroxide is preferred for pH adjustment, with sodium carbonate as an alternative. Adjusting the acidity and alkalinity facilitates coagulation and filtration. The SBR tank adopts vortex mixing aeration, and the aeration blower adopts variable frequency configuration. The nitrification liquid return pump adopts variable frequency control. The operation of effluent sludge discharge, etc., is managed by PLC automatic control.

[0019] The coagulation booster tank is divided into compartments that serve as backups for each other. Calcium hydroxide coagulant is added to the coagulation booster tank, which is also equipped with a booster pump and a central guide tube.

[0020] The screw press is equipped with a bypass pipe and valves.

[0021] The sieve buckets, rotary drum bar screens, and screw presses within the channel are all used to collect sludge and discharge it into garbage compactors for centralized transportation.

[0022] An apparatus and method for treating municipal solid waste filtrate using A-SBR technology, characterized by the following steps:

[0023] S1. The garbage compactor truck presses out the filter liquid from the domestic waste and then merges it with the flushing wastewater into the channel, where it flows by gravity into the coagulation and extraction tank. The residue and debris in the filter liquid and flushing wastewater are intercepted and removed by the slag collection pit, screen bucket and rotary drum bar screen in the channel.

[0024] S2. The coagulation lifting tank is used to separate mud and water and collect and lift water. After adding calcium hydroxide coagulant in the coagulation lifting tank, the mud and water are separated by hydraulic stirring and central guide tube in the coagulation lifting tank. The mud and water enter the screw press through the lifting pump.

[0025] S3. The effluent from the screw press flows by gravity into the emergency regulating tank, and the sludge, along with the sludge in the screen bucket and the rotary drum bar screen, is transported to the garbage compactor for unified treatment.

[0026] S4. The emergency regulating tank collects the incoming water from the screw press and the return water of the diluted solution in the SBR tank. After mixing, it is pumped into the modified anoxic tank. The effluent flows into the SBR tank by gravity through the oxygen release guide tube. The sludge is discharged into the coagulation lifting tank to increase the coagulation effect of the coagulation lifting tank and facilitate subsequent screw press filtration.

[0027] S5. The improved anoxic tank is connected to the SBR tank. Part of the process effluent from the SBR tank is returned to the emergency equalization tank for dilution. Part of the effluent from the SBR tank is connected to the disinfection tank for treatment and then discharged as compliant effluent.

[0028] S6. The SBR tank is equipped with a return pipe pump to the modified anoxic tank. In combination with the denitrification and sludge discharge requirements of the system, when the SBR tank is in the normal aeration stage, the return is used for denitrification, and when the SBR tank is in the sedimentation stage, the return is used for sludge discharge. The return ratio is controlled at 100~300%. Example

[0029] This device was first used in garbage compression and transfer stations in Shaanxi and Gansu provinces. According to local urban management requirements, regional household waste needs to be transported to the garbage compression and transfer station at two separate points every day. After being compressed by garbage compactors in the station, it is then transported to the garbage treatment plant for centralized disposal. Since it takes time for residents to develop awareness of garbage sorting, filtrate is inevitably produced during the garbage compression and filtration process. In addition, the station's rinsing wastewater, although small in volume, has a high concentration. Direct discharge into the city's pipe network will inevitably cause pollution.

[0030] At the invitation of a management committee, and taking into full consideration local environmental protection requirements, we have sorted out the relevant process flow and continuously optimized and improved it in subsequent practice. For the treatment of municipal solid waste filtrate, we finally determined the technical solution with A-SBR as the main process. From the perspective of investment, this has achieved volume reduction and energy saving, saving costs. From the perspective of process stability, it has maximized the advantages and avoided the disadvantages, further ensuring the stability of the entire system.

[0031] This invention combines an improved anoxic tank (A tank) with the SBR process, which not only strengthens the denitrification process requirements of the SBR tank, but also structurally enables the dilution treatment of high-concentration landfill filtrate, oxygen release, and sludge discharge. Considering the water quality characteristics, calcium hydroxide is specially used for pH adjustment and coagulation sedimentation. At the same time, the sludge treatment of the screw press is pre-positioned, and the sludge discharge of the A tank improves the efficiency of coagulation and filtration, ultimately ensuring process stability.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for treating municipal solid waste filtrate using A-SBR technology, comprising a garbage compactor truck for compressing municipal solid waste, wherein the garbage compactor truck collects the filtrate or domestic flushing wastewater through a channel, characterized in that: The channel is equipped with a slag collection pit and a screen bucket. The channel is connected to a rotary drum bar screen, which is connected to a coagulation booster tank. The coagulation booster tank is connected to a screw press, which is connected to an emergency regulating tank. The emergency regulating tank is connected to a modified anoxic tank. The modified anoxic tank is connected to both an SBR tank and a coagulation booster tank. The SBR tank is connected to a disinfection tank. After chlorination disinfection in the disinfection tank, the contents are discharged.

2. The device for treating municipal solid waste filtrate using A-SBR technology according to claim 1, characterized in that: The SBR tank and the modified anoxic tank are connected by a return pipe to form a nitrification liquid return system. The modified anoxic tank is equipped with an oxygen release guide tube. The SBR tank and the emergency equalization tank are connected to form a dilution liquid return device.

3. The device for treating municipal solid waste filtrate using A-SBR technology according to claim 1, characterized in that: The coagulation booster tank is divided into compartments that serve as backups for each other. Calcium hydroxide coagulant is added to the coagulation booster tank, which is also equipped with a booster pump and a central guide tube.

4. The device for treating municipal solid waste filtrate using A-SBR technology according to claim 1, characterized in that: The screw press is equipped with a bypass pipe and valves.

5. The device for treating municipal solid waste filtrate using A-SBR technology according to claim 1, characterized in that: The sieve buckets, rotary drum bar screens, and screw presses in the channel are all used to collect sludge and discharge it into garbage compactors for centralized transportation.

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