CN202124543U - Device for treating pharmaceutical wastewater through synchronous biological denitrification and devulcanization as well as autotrophic denitrification - Google Patents

Abstract

The utility model relates to a device for treating pharmaceutical wastewater through synchronous biological denitrification and devulcanization as well as autotrophic denitrification. The device is provided with a synchronous biological denitrification and devulcanization tank, an anaerobic methane-producing tank, a partial nitrosification tank, an autotrophic denitrification tank and a water outlet tank; the advanced treatment of the pharmaceutical wastewater is realized through the synergistic effect of a synchronous biological denitrification and devulcanization technology, an anaerobic methane-producing technology and an autotrophic biological denitrification process; and the device is suitable for the standard treatment, regeneration and recycling of the pharmaceutical wastewater, and has the advantages of complete structure and operation means, energy saving, low cost, good wastewater treatment effect and high efficiency.

Description

Simultaneous biological denitrification, desulfurization and autotrophic biological denitrification device for pharmaceutical wastewater treatment

technical field

The utility model relates to a biochemical treatment technology for pharmaceutical waste water, in particular to equipment for the advanced treatment of pharmaceutical waste water through the synergistic effect of synchronous biological denitrification and desulfurization, anaerobic methane production and autotrophic biological denitrification process, which is suitable for pharmaceutical waste water Up to standard treatment and recycling.

Background technique

Pharmaceutical wastewater has the characteristics of many types of organic pollutants, high concentration, complex components, and contains a large amount of sulfate, residual pharmaceuticals and their degradation products, and is recognized as difficult-to-treat organic wastewater. The water quality of pharmaceutical wastewater varies due to differences in production processes. The concentration of NH ₄ ⁺ -N in typical pharmaceutical wastewater is 600-3000mg/L, and the concentration of COD is 4000-50000mg/L.

On August 1, 2008, the Ministry of Environmental Protection of the People's Republic of China promulgated a new standard for the discharge of wastewater from the pharmaceutical industry - "Discharge Standards for Water Pollutants in the Fermentation Pharmaceutical Industry" (GB21903-2008), and the new standard was officially implemented in July 2010. The new standard stipulates: NH ₄ ⁺ -N<35mg/L, TN<70mg/L, COD<120mg/L. Calculated according to the above standards, the removal rate of nitrogen and COD in pharmaceutical wastewater must reach more than 95%. However, the existing pharmaceutical wastewater treatment technology is far from being able to economically and effectively remove high-concentration pollutants in pharmaceutical wastewater, and research and development of advanced pharmaceutical wastewater treatment technology is urgent.

At present, the removal of ammonia nitrogen in the actual engineering of pharmaceutical wastewater mainly adopts physical and chemical processes including mixed flocculation, chemical precipitation, ammonia stripping, membrane filtration and adsorption, etc., due to the addition of chemical reagents, the operation cost is high, the energy consumption is high, and the nitrogen pollution The pollutants are transferred from the water to the sludge and the air to achieve temporary effluent discharge, but not completely removed from the environment. It is difficult to treat the sludge and concentrated liquid generated during the treatment process, which brings secondary pollution problems. Very serious. Biological denitrification has the advantages of economy, high efficiency, and sustainability. It can save pretreatment processes such as ammonia stripping and subsequent treatment processes such as high-pressure reverse osmosis, and reduce the construction and operation costs of pharmaceutical wastewater treatment by at least 20%, and there is no concentration The production of secondary pollutants such as liquid, and truly realize the sustainable biochemical treatment of pharmaceutical wastewater.

Biological denitrification is an effective way to remove NH ₄ ⁺ -N, but when the concentration of NH ₄ ⁺ -N is high, it will have a strong inhibitory effect on the activity of nitrifying bacteria, making nitrification impossible. For the removal of high-concentration and complex organic matter in pharmaceutical wastewater, anaerobic biological method is usually selected as the pretreatment process, but the volatile fatty acid VFA produced in the anaerobic process will inhibit the nitrification of NH ₄ ⁺ -N.

It can be seen that due to insufficient understanding or insufficient attention to the water quality and changing laws of pharmaceutical wastewater, the treatment process and design parameters of urban sewage are blindly copied to the pharmaceutical wastewater treatment process. Not only is the treatment cost expensive, but the effluent cannot reach the standard at all. The existing pharmaceutical wastewater treatment technology does not coordinate the removal of organic matter and nitrogen removal well. Usually, the organic matter is removed first, and then nitrogen is removed. As a result, the organic carbon source for biological denitrification is insufficient, and the TN of the effluent is far from reaching the new level. control standards. The development of biochemical technology equipment that is suitable for the water quality characteristics of pharmaceutical wastewater with high efficiency and synergistic deep removal of organic matter and nitrogen is the key to the discharge and regeneration of pharmaceutical wastewater.

Utility model content

The purpose of this utility model is to solve the above-mentioned technical problems, and propose a device and method for synchronous biological denitrification and desulfurization and autotrophic biological denitrification treatment of pharmaceutical wastewater. The device and method realize the advanced treatment of pharmaceutical wastewater through the synergistic effect of synchronous biological denitrification and desulfurization, anaerobic methanogenesis and autotrophic biological denitrification processes. The device structure and process are perfect, and the cost and energy consumption are low. The processing effect is good and the efficiency is high.

The purpose of this utility model is achieved through the following technical proposals. The device for synchronous biological denitrification and desulfurization and autotrophic biological denitrification treatment of pharmaceutical wastewater is characterized in that it is equipped with synchronous denitrification and desulfurization pools and anaerobic methane production pools. , some nitrosation pools, autotrophic biological denitrification pools, and effluent pools;

The synchronous denitrification and desulfurization pool is a cylindrical biochemical reactor with a swirl water distributor at the bottom, a raw water inlet pipe connected to the swirl water distributor, a sludge degassing rectifier at the middle and upper part, and an air flow distributor at the upper part. Liquid-solid three-phase separator, the air-collecting chamber of the gas-liquid-solid three-phase separator is connected to the exhaust pipe, the upper part of the gas-liquid-solid three-phase separator is provided with a water outlet tank, and the circulation pipe with a circulation pump and the system are installed in the water outlet tank The water outlet and return pipe is connected and communicated with the swirling water distributor, and the water outlet tank is also equipped with an outlet pipe; the inner wall of the synchronous denitrification and desulfurization tank is provided with an annular baffle, the lower part is provided with an inlet, and sampling valves are provided at different heights of the tank body;

The shape of the anaerobic methanogenic tank is a cylindrical biochemical reactor. The upper part of the anaerobic methanogenic tank is equipped with a gas-liquid-solid three-phase separator, a gas collection chamber, and a biogas discharge pipe. The upper part of the gas-liquid-solid three-phase separator is equipped with an outlet. The water tank, the water outlet circulation pipe with the circulation pump provided in the water outlet tank is connected with the outlet pipe of the synchronous denitrification and desulfurization tank and the water inlet pipe of the anaerobic methanation tank, and the water inlet pipe is connected with the swirling water distribution pipe of the anaerobic methanation tank The outlet tank is also equipped with an outlet pipe; the lower part of the gas-liquid-solid three-phase separator is equipped with a two-layer sludge degassing rectifier, the inner wall of the anaerobic methane production tank is equipped with an annular baffle, the lower part is equipped with a mouth, and sampling valves are installed at different heights;

The partial nitrosation tank is a rectangular parallelepiped reactor, which is composed of anoxic stirring zone, aerobic zone and intermediate sedimentation tank arranged in sequence. The sludge return pipe is connected to the water inlet pipe at the bottom of the anoxic stirring zone, the agitator is set in the anoxic stirring zone, the aeration head is set at the bottom of the aerobic zone of the partial nitrosation reactor, and the upper part of the anaerobic stirring zone is equipped with The cavity is connected to the aerobic zone, the bottom of the aerobic zone is provided with a cavity to communicate with the intermediate sedimentation tank, the central pipe is arranged in the intermediate sedimentation tank, and the upper part of the intermediate sedimentation tank is provided with an overflow port to communicate with the autotrophic biological denitrification tank;

The autotrophic biological denitrification tank is a rectangular parallelepiped reactor with an aerobic reaction zone and a final sedimentation tank. An aeration head is set at the bottom of the aerobic reaction zone, and a high mass transfer biological filler is filled in the reaction zone. The middle part of the final sedimentation tank is provided with sloping plate packing, the bottom is provided with a sludge return pipe with a sludge return pump connected to the front end of the aerobic reaction zone, and the upper part of the final sedimentation tank is provided with an overflow port for the supernatant to flow into the outlet pool;

A system outlet return pipe is set at the bottom of the outlet pool to communicate with the water inlet pipe of the synchronous denitrification and desulfurization tank through the system outlet water return pump; a drain pipe is arranged on the upper part of the outlet pool.

Technical principle: The pretreated pharmaceutical wastewater and the reflux system effluent enter the synchronous denitrification and desulfurization tank at the same time. The denitrifying bacteria in the pool use the organic matter in the raw water to complete the combined nitrogen (NO ₂ ^- -N Or NO ₃ ^- -N) efficient denitrification to achieve biological denitrification and recovery of alkalinity. At the same time, sulfate-reducing bacteria use organic matter in raw water to complete the reduction of sulfate SO ₄ ^2- . After completing synchronous denitrification and desulfurization, the pharmaceutical wastewater flows into the anaerobic methanogenic tank, and most of the organic matter in the pharmaceutical wastewater is removed through the synergistic effect of hydrolytic acidification bacteria and methanogenic bacteria. The effluent from the anaerobic methanogenesis tank enters the anoxic stirring zone of the partial nitrification tank to complete the denitrification of the combined nitrogen (NO ₂ ^- -N or NO ₃ ^- -N) in the return sludge of the intermediate sedimentation tank, and further degrade the organic matter in the wastewater , the mixed liquid in the anoxic zone flows into the aerobic zone to complete the partial nitrosation of high ammonia nitrogen, and enters the autotrophic biological denitrification tank through the intermediate sedimentation tank to complete the nitrosation of ammonia nitrogen and anaerobic ammonium oxidation simultaneously, realizing deep denitrification. After the mixed liquid in the autotrophic biological denitrification tank enters the final sedimentation tank for mud-water separation, it finally flows into the overflow water of the effluent tank to complete the efficient and deep removal of organic matter and nitrogen in pharmaceutical wastewater.

In the above-mentioned pharmaceutical wastewater biological treatment system, the organic matter in the wastewater is mainly used for methane production, denitrification and desulfurization, recovering methane, and reducing _CO2 emissions. In the part of the nitrification tank and the subsequent autotrophic biological denitrification tank, the nitrification of high-concentration ammonia nitrogen and the autotrophic biological denitrification are completed, saving more than 40% of the aeration volume and 60% of the denitrification carbon source, and the rest of the entire system Sludge production is reduced by more than 60%.

Compared with the prior art, the device for synchronous biological denitrification, desulfurization and autotrophic biological denitrification of the utility model has the following advantages:

1) The anaerobic reactor is used to remove most of the organic matter in the sewage and recover methane energy. The traditional process uses aeration to aerobically degrade the organic matter, "consuming energy", and at the same time produces a large amount of residual biological sludge that is difficult to treat and emits a large amount of CO ₂ .

2) Use the carbon source in raw water to complete synchronous denitrification and desulfurization, reduce the addition of external carbon sources, recover alkalinity, prevent over-acidification of anaerobic methanogenic pools, and provide sufficient alkalinity for nitrification of high ammonia nitrogen to prevent sulfide inhibition Methanogens.

3) Through the combination of semi-nitrosation and autotrophic biological denitrification, high-efficiency and low-consumption nitrogen removal in pharmaceutical wastewater can be realized. Compared with traditional processes, more than 40% of aeration and 60% of denitrification carbon sources can be saved. The residual sludge production of the system is reduced by more than 60%. .

4) While realizing the standard discharge and recycling of pharmaceutical wastewater, this technology embodies the concept of sustainable pharmaceutical wastewater biological treatment with minimum COD oxidation, minimum _CO2 emission, minimum residual sludge generation, and maximum energy recovery.

Description of drawings

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

The appearance of the device of the present invention is not limited by this figure, and only changes in appearance also belong to the protection scope of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further: Embodiment 1:

Synchronous biological denitrification, desulfurization and autotrophic biological denitrification device for treating pharmaceutical wastewater: the device is equipped with synchronous denitrification and desulfurization pool 1, anaerobic methanogenesis pool 2, partial nitrification pool 3, and autotrophic biological denitrification pool 4. Outlet pool 5;

The synchronous denitrification and desulfurization tank is a cylindrical biochemical reactor with a swirl water distributor 1.6 at the bottom, a raw water inlet pipe 1.1 connected to the swirl water distributor 1.6, a sludge degassing rectifier 1.9 at the middle and upper part, and an air flow distributor 1.9 at the upper part. The liquid-solid three-phase separator 1.10, the air-collecting chamber 1.11 of the gas-liquid-solid three-phase separator is connected to the exhaust pipe 1.13, the upper part of the gas-liquid-solid three-phase separator is provided with a water outlet 1.12, and the water outlet is provided with a circulating pump 1.3 The circulation pipe 1.4 of the system is connected to the system outlet and return pipe 1.5, and communicated with the swirling water distributor 1.6, the outlet tank 1.12 is also provided with an outlet pipe 1.14, and the inner wall of the synchronous denitrification and desulfurization pool is provided with an annular baffle 1.7, and the lower part is provided with an inlet 1.15, Set sampling valve 1.8 at different heights;

The anaerobic methanogenic tank is a cylindrical biochemical reactor, the upper part of the anaerobic methanogenic tank is equipped with a gas-liquid-solid three-phase separator 2.6, a gas collection chamber 2.7, and a biogas discharge pipe 2.9, and the upper part of the gas-liquid-solid three-phase separator is set There is a water outlet tank 2.8, and the outlet water circulation pipe 2.12 of the band circulation pump 2.2 provided in the water outlet tank communicates with the outlet pipe 1.14 of the synchronous denitrification and desulfurization tank and the inlet pipe 2.1 of the anaerobic methane production tank, and the inlet pipe is connected to the anaerobic The swirling water distributor 2.3 of the methanogenic pool is connected, the outlet tank is also provided with an outlet pipe 2.10, the lower part of the gas-liquid-solid three-phase separator is provided with a two-layer sludge degassing rectifier 2.4, and the inner wall of the anaerobic methanogenic pool is provided with an annular baffle 2.13 , the lower part is equipped with a population of 2.5, and the sampling valve 2.11 is set at different heights;

Part of the nitrosation tank is a rectangular parallelepiped reactor consisting of an anoxic stirring zone 3.1, an aerobic zone 3.4 and an intermediate sedimentation tank 3.7 arranged in sequence. The outlet pipe 2.10 of the anaerobic methanogenic tank and the bottom of the intermediate sedimentation tank are polluted The sludge return pipe 3.9 of the mud return pump 3.11 communicates with the water inlet pipe 3.8 at the bottom of the anoxic stirring zone, the agitator 3.2 is set in the anoxic stirring zone, and the aeration head 3.10 is set at the bottom of the aerobic zone of the partial nitrosation reactor. The upper part of the anaerobic stirring zone is provided with a cavity to communicate with the aerobic zone, and the bottom of the aerobic zone is provided with a cavity to communicate with the intermediate sedimentation tank. The central pipe 3.12 is arranged in the intermediate sedimentation tank, and the upper part of the intermediate sedimentation tank is provided with an overflow port and an autotrophic tank. The biological denitrification pool is connected;

The autotrophic biological denitrification tank is a rectangular parallelepiped reactor with an aerobic reaction zone 4.2 and a final sedimentation tank 4.4. An aeration head 4.6 is arranged at the bottom of the aerobic reaction zone, and a high mass transfer biological filler 4.3 is filled in the zone. , the middle part of the final sedimentation tank is provided with inclined plate filler 4.5, and the bottom is provided with a sludge return pipe with a sludge return pump 4.9 connected to the front end of the aerobic reaction zone, and the upper part of the final sedimentation tank is provided with a supernatant inflow effluent pool 5 the overflow port;

A system outlet return pipe 1.5 is provided at the bottom of the outlet pool 5 to communicate with the inlet pipe 1.1 of the synchronous denitrification and desulfurization tank through the system outlet return pump 5.2; a drain pipe 5.1 is provided on the upper part of the outlet pool.

It should be pointed out that those skilled in the art can make some changes and improvements without departing from the principle of the utility model, and these changes and improvements should also be regarded as the protection scope of the utility model.

Claims (1)

1. the pharmacy waste water treatment unit of synchronous biological denitrification reversal of cure and denitrification of autotrophic organism is characterized in that: be provided with synchronous denitrification reversal of cure pond (1), anaerobism product methane pond (2), part nitrosification pond (3), denitrification of autotrophic organism pond (4), outlet sump (5);

Synchronous denitrification reversal of cure pond is a right cylinder biochemical reactor, and the bottom is provided with cyclone water distributor (1.6), and raw water tubes (1.1) and cyclone water distributor (1.6) are communicated with; The middle and upper part is provided with mud degassing RF (1.9); Top is provided with gas-liquid-solid three-phase separator (1.10), and the collection chamber of gas-liquid-solid three-phase separator (1.11) is connected with vapor pipe (1.13), and gas-liquid-solid three-phase separator top is provided with effluent trough (1.12); The circulation tube (1.4) of the band recycle pump (1.3) that this effluent trough is provided with is connected with system's effluent recycling pipe (1.5); And be communicated with cyclone water distributor (1.6), effluent trough (1.12) also is provided with rising pipe (1.14), and synchronous denitrification reversal of cure pond inwall is provided with annular spoiler (1.7); The bottom is provided with population (1.15), and different heights is provided with sampling valve (1.8);

It is a right cylinder biochemical reactor that anaerobism is produced the methane pond; The top that anaerobism is produced the methane pond is provided with gas-liquid-solid three-phase separator (2.6), collection chamber (2.7), firedamp drainage pipe (2.9); Gas-liquid-solid three-phase separator top is provided with effluent trough (2.8); The water-circulating pipe (2.12) that goes out of the band recycle pump (2.2) that this effluent trough is provided with is communicated with the water inlet pipe (2.1) that the rising pipe (1.14) and the anaerobism in said synchronous denitrification reversal of cure pond are produced the methane pond, and this water inlet pipe is communicated with the cyclone water distributor (2.3) that anaerobism is produced the methane pond, and effluent trough also is provided with rising pipe (2.10); The gas-liquid-solid three-phase separator bottom is provided with two-layer mud degassing RF (2.4); Anaerobism is produced methane pond inwall annular spoiler (2.13) is set, and the bottom is provided with population (2.5), and different heights is provided with sampling valve (2.11);

Part nitrosification pond is the reactor drum of a rectangular parallelepiped; Form by the anoxia stirring district (3.1) of arranging in regular turn, aerobic zone (3.4) and intermediate sedimentation pond (3.7); The rising pipe (2.10) that said anaerobism is produced the methane pond is communicated with the mud return line (3.9) of intermediate sedimentation pond bottom band sludge reflux pump (3.11) and the water inlet pipe (3.8) of bottom, anoxia stirring district; Said anoxia stirring district is provided with whisking appliance (3.2); The aerobic zone bottom of part nitrosation reaction device is provided with aeration head (3.10), and the top of said anaerobism stirring area is provided with the cavity and is communicated with aerobic zone, and the bottom of aerobic zone is provided with the cavity and is communicated with the intermediate sedimentation pond; Pipe core (3.12) is set in the intermediate sedimentation pond, and top, intermediate sedimentation pond is provided with riser and is communicated with the denitrification of autotrophic organism pond;

The denitrification of autotrophic organism pond is the reactor drum of a rectangular parallelepiped; Be provided with aerobic reactor zone (4.2), final deposition pool (4.4); Said aerobic reactor zone bottom is provided with aeration head (4.6), and in the district, loads high mass transfer biologic packing material (4.3), and said final deposition pool middle part is provided with swash plate filler (4.5); The mud return line that the bottom is provided with band sludge reflux pump (4.9) is connected with said aerobic reactor zone front end, and the top of final deposition pool is provided with the riser that supernatant flows into outlet sump (5);

Outlet sump (5) bottom is provided with system's effluent recycling pipe (1.5) and is communicated with the water inlet pipe (1.1) in said synchronous denitrification reversal of cure pond through system's effluent recycling pump (5.2); Be provided with water shoot (5.1) on the top of outlet sump.

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