CN211226832U

CN211226832U - Pharmacy effluent disposal system

Info

Publication number: CN211226832U
Application number: CN201922249446.9U
Authority: CN
Inventors: 左小伟; 张赞森; 刘曼曼; 张宁; 魏俊敏
Original assignee: Henan Lance Environmental Protection Technology Co ltd
Current assignee: Henan Lance Environmental Protection Technology Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-08-11
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a pharmacy effluent disposal system belongs to waste water treatment technical field. Pharmacy effluent disposal system, include along pretreatment unit, UASB reactor, aeration sedimentation tank, AO pond and the secondary sedimentation tank that the wastewater treatment direction set gradually, pretreatment unit include the grid well, with the equalizing basin that the grid well delivery port is connected and with the air supporting pond that the equalizing basin delivery port is connected, sludge concentration tank is connected respectively to air supporting pond, aeration sedimentation tank and secondary sedimentation tank, sludge dewatering machine room is connected to sludge concentration tank, the partial mud of secondary sedimentation tank flows back to the section of intaking in AO pond, the play water part in AO pond flow back extremely the section of intaking in AO pond. The utility model discloses can effectively reduce the pollutant concentration in the pharmacy waste water, make waste water reach the requirement of relevant standard.

Description

Pharmacy effluent disposal system

Technical Field

The utility model belongs to the technical field of waste water treatment, especially, relate to a pharmacy effluent disposal system.

Background

The enterprises produce products such as prednisolone, hydrogen acetate, acetolone, sodium, hydrocortisone, prednisone and the like, and the discharged wastewater contains various toxic substances such as pyridine, acetone, sodium nitrite and the like. If the substances are not removed, the effect of the biochemical treatment is seriously affected.

CN 205528224U discloses a chemical synthesis pharmaceutical wastewater treatment system, which comprises high-concentration wastewater and low-concentration wastewater, and comprises a high-concentration wastewater pretreatment system and an integrated wastewater treatment system; discharging the high-concentration wastewater into a high-concentration wastewater pretreatment system, and discharging the pretreated high-concentration wastewater and the low-concentration wastewater into a comprehensive wastewater treatment system; the chemical synthesis pharmaceutical wastewater treatment system has higher reliability, stability, continuity and impact load resistance; after the high-concentration wastewater is pretreated and then mixed with the low-concentration wastewater, and the effluent can stably reach the water pollution discharge standard specified in the discharge standard of chemical synthesis pharmaceutical industry water pollutants (GB 21904-. The treatment system has the disadvantages of complicated process, high investment cost and high operating cost.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to solve the technical problem that a pharmacy effluent disposal system is provided to effectively get rid of the pollutant in the pharmacy effluent, make waste water discharge to reach standard.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

pharmacy effluent disposal system, include along pretreatment unit, UASB reactor, aeration sedimentation tank, AO pond and the secondary sedimentation tank that the wastewater treatment direction set gradually, pretreatment unit include the grid well, with the equalizing basin that the grid well delivery port is connected and with the air supporting pond that the equalizing basin delivery port is connected, sludge concentration tank is connected respectively to air supporting pond, aeration sedimentation tank and secondary sedimentation tank, sludge dewatering machine room is connected to sludge concentration tank, the partial mud of secondary sedimentation tank flows back to the section of intaking in AO pond, the play water part in AO pond flow back extremely the section of intaking in AO pond.

Preferably, a pH adjusting device is arranged between the grid well and the adjusting tank, and the pH adjusting device is connected with an alkali adding device.

Preferably, the air flotation tank is an ultra-efficient shallow air flotation tank, and the ultra-efficient shallow air flotation tank is connected with a dosing device.

Preferably, an intermediate water tank is arranged between the aeration sedimentation tank and the A/O tank, and part of mixed liquid in the intermediate water tank flows back to a water inlet section of the UASB reactor.

Preferably, the aerobic sections of the aeration sedimentation tank and the A/O tank are respectively connected with an aeration device.

Preferably, the supernatant of the sludge concentration tank flows back to the adjusting tank.

Preferably, the percolate of the sludge dewatering machine room flows back to the regulating tank.

Preferably, the regulating reservoir is connected with an emergency accident pool.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses characteristic and the processing requirement to pharmaceutical wastewater adopt "pH adjusts + super-effect shallow air supporting + UASB + aeration and deposits + AO and handle"'s technology, and this technology can guarantee that it is up to standard to go out water, and the technology is more ripe, and operation maintenance is convenient, and the investment is more reasonable, and the working costs is lower.

In the utility model, the pretreatment process adopts the pH adjustment and super-effect shallow air flotation process, the coagulant adopted in the air flotation tank can make toxic and harmful substances such as pyridine and the like in the wastewater generate complex reaction, and the complex is difficult to precipitate in the wastewater, so the air flotation is adopted for removal, and the normal operation of a follow-up biochemical treatment system is ensured.

The UASB reactor has better degradation effect on high-concentration wastewater. BOD of its effluent₅/COD_crThe value will increase while at the same timeA large amount of denitrification is carried out in the tank, and after the UASB reactor discharges water, aeration sedimentation is adopted to carry out H in the anaerobic wastewater₂S, methane and other gases play a certain role in stripping, achieve the function of preoxygenation and reduce partial pressure of activated sludge. The backflow design of 0-2Q is carried out on the active sludge in the middle water tank from the outlet water to the inlet water of the UASB reactor, so that the UASB and aeration precipitation process forms an A/O combined process, and the process ensures that most of organic matters and ammonia nitrogen in the wastewater are degraded and removed.

COD of effluent of' UASB + aeration precipitation_crConcentration is still higher, the utility model discloses a AO technology is handled, need not supply the carbon source, also need not nitrify the liquid backward flow, and the biodegradability is better, and this AO technology does not handle complete organic matter in to anterior segment technology, carries out thorough processing, effectively gets rid of the nitrate nitrogen that it produced, and the total nitrogen of assurance system effluent is up to standard. In macroscopical view, the utility model adopts the combination of the two-stage A/O series connection process. The aerobic biochemical treatment of the front section adopts a completely mixed activated sludge method, the sludge concentration is higher, the method is suitable for treating high-concentration organic wastewater, the aerobic biochemical treatment of the rear section adopts a contact oxidation method, and the effluent is relatively stable. The anaerobic biochemistry of the front section adopts UASB technology and is mainly used for treating high-concentration organic matters which are difficult to biochemically, and the anaerobic biochemistry of the rear section adopts preposed denitrification and is mainly used for treating nitrate nitrogen. Therefore, the treatment effect of the 'A/O' in the front section is much higher than that of the A/O in the rear section, and the advantages of the two-stage A/O process are complementary and matched with each other, so that the standard discharge of all indexes in the wastewater is ensured.

By adopting the treatment process, the target pollutants of the pharmaceutical wastewater are treated to the limit value, which meets the requirements of the secondary discharge standard of Integrated wastewater discharge Standard (GB 8978-1996), and the effect is remarkable.

Drawings

FIG. 1: the treatment flow chart of the pharmaceutical wastewater treatment system of the utility model;

wherein: 1-grid well, 2-pH adjusting device, 3-adjusting tank, 4-super-effect shallow air flotation tank, 5-UASB reactor, 6-aeration sedimentation tank, 7-middle water tank, 8-A/O tank, 9-secondary sedimentation tank, 10-alkali adding device, 11-chemical adding device, 12-sludge concentration tank, 13-sludge dewatering machine room, and 13-emergency accident tank.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

With reference to figure 1 of the drawings,

pharmacy effluent disposal system, including the preprocessing device who sets gradually along the waste water treatment direction, UASB reactor 5, aeration sedimentation tank 6, AO pond 8 and secondary sedimentation tank 9, preprocessing device includes grid well 1 and the equalizing basin 3 of being connected with grid well 1 delivery port and the air supporting pond of being connected with equalizing basin 3 delivery port, air supporting pond, aeration sedimentation tank 6 and secondary sedimentation tank 9 are connected sludge concentration tank 12 respectively, sludge concentration tank 12 connects sludge dewatering machine room 13, the partial mud of secondary sedimentation tank 9 flows back to the section of intaking in AO pond 8, the play water part of AO pond 8 flows back to the section of intaking in AO pond 8.

A pH adjusting device 2 is arranged between the grid well 1 and the adjusting tank 3, and the pH adjusting device 2 is connected with an alkali adding device 10. The alkali adding device 10 is provided with alkali liquor or lime liquor (Ca (OH)₂A solution).

The air flotation tank is an ultra-efficient shallow air flotation tank 4, and the ultra-efficient shallow air flotation tank 4 is connected with a dosing device 11. The dosing device 11 is provided with a flocculating agent.

An intermediate water tank 7 is arranged between the aeration sedimentation tank 6 and the A/O tank 8, and part of mixed liquid in the intermediate water tank 7 flows back to the water inlet section of the UASB reactor 5.

The aerobic sections of the aeration sedimentation tank 6 and the A/O tank 8 are respectively connected with an aeration device.

The supernatant of the sludge concentration tank 12 is returned to the adjusting tank 3. And the percolate of the sludge dewatering machine room 13 flows back to the regulating tank 3.

The adjusting tank 3 is connected with an emergency accident tank. When the system is overhauled or has operation failure, the sewage can be temporarily stored in an emergency accident pool, and after the system or equipment is overhauled, the sewage enters the system again for treatment, and the emergency time is 24 hours.

1) Grid well 1

The installation platform of the mechanical grating removes most of impurities, floating matters and suspended matters in the sewage through the mechanical grating, and the removal rate can reach more than 98 percent so as to reduce the failure rate of the subsequent equipment operation; the design of two channels is adopted, and the other channel can be used as a later-stage reserved channel and an accident bypass channel.

2) pH value adjustment

The monitoring result of the pH value of the wastewater shows that the pH value of the wastewater is about 4.0. The anaerobic reaction needs a certain alkalinity, the low pH value of the wastewater is not beneficial to the formation of complexes of toxic and harmful substances such as pyridine, and the purpose of removing the toxic and harmful substances such as pyridine can be achieved after the pH value is adjusted to about 7.5, so that the pH value of the wastewater is adjusted at first.

The pH value is adjusted by adopting a pH automatic adjusting and automatic monitoring system and adding alkali liquor or lime liquor (Ca (OH)₂Solution) to increase the pH to about 7.5, having the following characteristics: A. the operation cost can be reduced; B. the method is beneficial to the generation of reaction precipitation (such as calcium ions, oxalate ions and the like), and can improve the precipitation effect.

3) Super-efficient shallow air-float

The toxic substances such as pyridine in the wastewater inhibit biochemical treatment and need to be removed in pretreatment. According to the previous engineering practice experience of the wastewater treatment, the chemical separation is feasible by adding the flocculating agent, the added flocculating agent can enable the wastewater to generate a complex, and the complex is removed by adopting an air floatation treatment method. The pretreatment can reduce the difficulty of subsequent biochemical treatment and create good water quality conditions for the subsequent biochemical treatment.

4) Regulating reservoir 3

In the chemical pharmaceutical production process, the concentration and the water quantity of the wastewater generated in each process are different, and the effluent is different between every two production lines, so that in order to equalize the water quantity and the water quality and prevent high-concentration substances from directly entering a subsequent biological treatment system, a pretreatment regulation sedimentation tank is necessary to be arranged. It is characterized in that: A. the buffering capacity of the organic matter load is improved, the rapid change of the load of a biological treatment system is prevented, and the stable operation of a sewage treatment facility is ensured; B. the flow fluctuation of the physicochemical treatment system is reduced, so that the water quality adjustment is more beneficial to the operation of subsequent treatment construction.

5) Addition of nutrient elements

The wastewater lacks phosphorus elements required by microorganism growth, so that phosphorus salt is necessary to be added, and a phosphorus salt adding system is adopted to ensure various trace elements required by microorganisms in the wastewater.

6) UASB anaerobic treatment

The anaerobic biological treatment process is that under the anaerobic condition, various microorganisms act together to decompose organic matters and generate CH₄And CO₂The process of (1). It can be divided into three stages: hydrolysis and fermentation; hydrogen production and acetic acid production stages; a methane stage. Compared with aerobic biological treatment, the anaerobic biological method has low energy consumption and small sludge production, can recycle and comprehensively utilize energy when conditions allow, and can degrade part of substrates which cannot be degraded by the aerobic biological method. The anaerobic reaction can create good material conditions for subsequent aerobic treatment while exerting the function of the anaerobic reaction, therefore, the utility model discloses a one-step anaerobism (UASB process), can guarantee the high-efficient operation of anaerobism, can reduce investment cost again.

The Upflow Anaerobic Sludge Blanket (UASB) process is the anaerobic sewage treatment process with the most practical running amount and the most ideal effect in China at present, and the advancement, the reliability and the economical efficiency of investment operation of the process are proved. The UASB reactor has three-phase separator in the upper part, sludge suspending area and sludge area in the lower part and water distributing area in the bottom, and can realize sludge granulation inside the reactor, excellent settling performance of granular sludge and excellent interception of three-phase separator to sludge. Therefore, the UASB process has the advantages of high volume load, obvious removal effect, strong impact resistance and high sludge concentration for treating the high-concentration organic wastewater, and has high methanogenesis activity. Because UASB does not set up the filler, has avoided the problem of blocking, do not set up sedimentation tank and mud backflow apparatus, simplified the process facility, reduced the capital investment, the working costs is very cheap too, UASB is wide in the treatment field of various high-concentration organic waste water and applied, design and operation experience are abundant.

7) Aeration precipitation

Because the UASB effluent has low dissolved oxygen and high organic matter concentration, the subsequent aerobic treatment load is increased, and the UASB effluent has toxic action on the aerobic treatment, the aeration sedimentation tank 6 is arranged.

The aeration sedimentation tank 6 is internally provided with a tubular aerator, so that sludge in anaerobic effluent can be effectively removed, and H is blown off₂S and other harmful gases increase the dissolved oxygen in the water.

8) Reflux from the intermediate water tank 7 to the UASB reactor 5

The backflow from the water outlet of the intermediate water tank 7 to the UASB reactor 5 is increased, and the device has the following characteristics:

(1) the reflux amount can be 0-2Q (calculated by the reflux amount of 1Q);

(2) diluting the wastewater entering the UASB reactor 5 to greatly reduce the concentration of the wastewater entering the UASB reactor 5;

(3) increase COD in wastewater_crThe removal efficiency of (2);

(4) under anoxic conditions (with nitrate nitrogen, without dissolved oxygen), zoogloea bacteria can utilize nitrate as the final electron acceptor to realize the absorption, storage and degradation utilization of organic matters, while filamentous bacteria lack the capacity. In the main aeration tank, the zoogloea bacteria can be oxidized and stored in the inner source to be proliferated, and the filamentous bacteria are inhibited due to the lack of food, so that the zoogloea bacteria are dominant in the anoxic selector, and the growth of the filamentous bacteria is inhibited. In the aspect of designing the oxygen-poor selector, besides maintaining the substrate concentration in the reactor, the actual dissolved oxygen concentration should be as close to 0 value as possible, and the hydraulic retention time of the reactor should be as long as possible to ensure the completion of denitrification.

(5) The system has the characteristics that:

A. the denitrification (UASB reactor 5) is arranged in front of the integrated reactor for nitrification (aeration part) reaction;

B. organic matters in the raw wastewater are used as a carbon source in the denitrification reaction;

C. after the nitration reaction, the nitration liquid flows back to the denitrification reactor to carry out denitrification reaction.

9) A/O processing

After the wastewater is treated by the UASB reactor 5, the organic matters in the wastewater are greatly degraded, and an A/O biochemical treatment device is adopted to further reduce the content of pollutants in the wastewater. Considering continuous aerobic treatment, the treatment is difficult, the efficiency cannot reach very high, an A/O treatment process is adopted, a submersible mixer is arranged at the section A, the water quality is adjusted through the hydrolysis of the section A, the biochemical condition is improved, and the treatment efficiency of the next section O is improved; through the denitrification of the section A, the total nitrogen in the wastewater can be removed. And the O section adopts an activated sludge method to ensure that the quality of the effluent is stable and reaches the standard to be discharged.

The biological activated sludge process (O section) is a traditional waste water treatment process and is characterized by that it can regulate sludge concentration and biological activity in the waste water, in the interior of the tank a large quantity of flocculent sludge granules which can be observed by naked eye are suspended, in every flocculent several thousands of active microorganisms are embedded, and an aeration device is set to oxygenate the sewage. And the sewage in the tank body is in a flowing state so as to ensure that the wastewater and the homologous water are fully mixed in the treatment facility. The wastewater and the activated sludge flocs suspended in the wastewater are subjected to adsorption, diffusion, hydrolysis and metabolism processes, the activated sludge flocs in the wastewater which just enters the aeration tank come from the return activated sludge, so that sufficient activated sludge is ensured to timely return to the front end of the aeration tank and is kept in full contact and mixing with the sewage which just enters the aeration tank, and the wastewater is fully purified when flowing out of the aeration tank.

The biological activated sludge process has the following characteristics: 1. the activated sludge tank has higher volume load due to adjustable sludge concentration; 2. the water flow is completely mixed, so the water quality and the water quantity have stronger adaptability to sudden change of water quality and water quantity; 3. the method is a traditional process, the technology is mature, and the operation experience is rich. 4. The mixed liquid from the section O to the section A flows back, and the standard discharge of the waste water is ensured.

The pharmaceutical wastewater is firstly subjected to pH adjustment (adjusted to about pH 7.5) and then enters the adjusting tank 3, and the adjusting tank 3 has better adjusting effect on the water quality and the water quantity of the wastewater, so that the pharmaceutical wastewater is enabled to beUneven waste water discharged between production shifts obtains the balance of water quality and the continuity of water quantity. The wastewater is lifted to an ultra-efficient shallow air flotation tank 4 from a regulating tank 3, and the ultra-efficient shallow air flotation tank 4 is used for flocculation ultra-efficient air flotation, so that toxic and harmful substances such as pyridine and the like in the wastewater are effectively removed, and the normal operation of a subsequent biochemical system is ensured. Then the wastewater automatically flows into the UASB reactor 5, and the phosphorus salt is added before the wastewater enters the UASB reactor 5, so that the biochemical degree of the wastewater is improved. The UASB reactor 5 is a deep anaerobic reactor which not only reduces COD_crEffectively degrades macromolecule and hardly biodegradable organic matters in the wastewater, and adjusts BOD of the wastewater₅/COD_crThe ratio of (a) to (b) improves the biochemical degree of the wastewater. The effluent of the UASB reactor 5 automatically flows into an aeration sedimentation tank 6, and H generated after the aeration sedimentation tank 6 anaerobically treats the wastewater in an aeration section₂S and other toxic and harmful gases are blown off, the wastewater is pre-aerated, and the sludge precipitated by the precipitation part is discharged to a sludge concentration tank 12; the effluent of the aeration sedimentation tank 6 enters an intermediate water tank 7, 0-2Q mixed liquid is set to flow back in the intermediate water tank 7, the concentration of the wastewater is diluted under the condition that the treated water amount is not increased, and the biodegradability of the wastewater is improved. The effluent of the intermediate water tank 7 enters an A/O tank 8, and a tube type aerator is arranged at the bottom of the O section tank, so that the oxygen utilization rate is improved; and the A/O pool 8 is provided with 0-3Q mixed liquid for backflow, and water discharged from the O section flows back to the A section. And the effluent of the A/O pool 8 enters a secondary sedimentation pool 9, and is discharged after reaching the standard after sedimentation.

Sludge discharged from all levels of structures enters a sludge concentration tank 12 for concentration, is dewatered by a sludge dewatering machine, sludge cakes are transported out, supernatant of the sludge concentration tank 12 and percolate of the dewatering machine flow back to a regulating tank 3, and then enters the system for treatment again.

The utility model discloses the device is used for handling a certain pharmaceutical factory waste water, and the basic data is as follows:

1) treatment scale: the overall scale of engineering design is 150m³/d。

2) Designing the quality of inlet water:

note: the inlet water does not contain toxic substances such as heavy metals and the like.

After the treatment by the treatment system, the analysis results of the removal rate of main pollutants in the wastewater treatment effect are as follows:

as can be seen from the above table, the discharged water quality meets the secondary discharge standard of Integrated wastewater discharge Standard (GB 8978-1996).

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. Pharmacy effluent disposal system, its characterized in that: include along effluent treatment direction preprocessing device, UASB reactor, aeration sedimentation tank, AO pond and the secondary sedimentation tank that sets gradually, preprocessing device include the grid well, with the equalizing basin that the grid well delivery port is connected and with the air supporting pond that the equalizing basin delivery port is connected, sludge thickening tank is connected respectively to air supporting pond, aeration sedimentation tank and secondary sedimentation tank, sludge dewatering machine room is connected to sludge thickening tank, the partial mud of secondary sedimentation tank flows back to the section of intaking in AO pond, the play water part in AO pond flow back extremely the section of intaking in AO pond.

2. The pharmaceutical wastewater treatment system of claim 1, wherein: and a pH adjusting device is arranged between the grid well and the adjusting tank and is connected with an alkali adding device.

3. The pharmaceutical wastewater treatment system of claim 2, wherein: the air flotation tank is an ultra-efficient shallow air flotation tank, and the ultra-efficient shallow air flotation tank is connected with a dosing device.

4. The pharmaceutical wastewater treatment system according to claim 3, wherein: an intermediate water tank is arranged between the aeration sedimentation tank and the A/O tank, and part of mixed liquid in the intermediate water tank flows back to a water inlet section of the UASB reactor.

5. The pharmaceutical wastewater treatment system according to claim 4, wherein: the aerobic sections of the aeration sedimentation tank and the A/O tank are respectively connected with an aeration device.

6. The pharmaceutical wastewater treatment system according to claim 5, wherein: and the supernatant of the sludge concentration tank flows back to the regulating tank.

7. The pharmaceutical wastewater treatment system according to claim 6, wherein: and the percolate of the sludge dewatering machine room flows back to the regulating tank.

8. The pharmaceutical wastewater treatment system according to any one of claims 1 to 7, wherein: the adjusting pool is connected with the emergency accident pool.