CN108083577B - Sewage treatment regulating system and sewage treatment method for natural medicine extraction - Google Patents

Sewage treatment regulating system and sewage treatment method for natural medicine extraction Download PDF

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CN108083577B
CN108083577B CN201711440546.9A CN201711440546A CN108083577B CN 108083577 B CN108083577 B CN 108083577B CN 201711440546 A CN201711440546 A CN 201711440546A CN 108083577 B CN108083577 B CN 108083577B
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sewage
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CN108083577A (en
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张秋生
周三富
郭爽
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Jilin Pharmaceutical Design Institute Co.,Ltd.
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张秋生
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C02F2103/026—Treating water for medical or cosmetic purposes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes

Abstract

The invention discloses a treatment and regulation system for natural drug extraction sewage, which comprises a grid well, a primary sedimentation tank, a first detection tank, a regulation tank, a second detection tank, a PEIC anaerobic reactor, a contact oxidation tank, a secondary sedimentation tank and a transfer tank which are sequentially connected in series. An acid-base feed port is arranged at the upper end of the first detection pool, and a first COD online detector and a pH online detector are respectively arranged in the first detection pool; a second COD online detector is arranged in the second detection pool; the transfer tank is provided with a third COD online detector; the transfer pool is communicated with the first detection pool and the adjusting pool. In addition, the invention also provides a method for treating the natural medicine extraction sewage by using the natural medicine extraction sewage treatment regulating system. The sewage treatment regulating system has the advantages of good treatment effect, high efficiency and good stability, and sewage can be discharged after reaching the standard after being treated by the sewage treatment regulating system.

Description

Sewage treatment regulating system and sewage treatment method for natural medicine extraction
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a sewage treatment regulating system and a sewage treatment method for natural medicine extraction.
Background
The extraction-type pharmaceutical preparation refers to a process of preparing a drug by extracting, separating, purifying and the like various basic substances playing important physiological roles in a living body by using physical, chemical and biochemical methods. The solvent extraction method is the most widely applied extraction method, and is an extraction method for dissolving the required active ingredients from the tissues of medicinal materials by selecting a solvent with high solubility to the required ingredients and low solubility to other ingredients according to the solubility properties of various active ingredients in the Chinese herbal medicines, wherein the most commonly used organic solvent in the solvent extraction method is ethanol.
In the natural medicine extraction process, the amount of the organic solvent used is different according to different production varieties, the COD concentration in the produced sewage is generally in the range of 142-18000mg/L, and the concentration of the discharged sewage is changed every day and every time. The domestic treatment of the sewage generated by extracting the natural medicines mainly adopts a biochemical method. In recent years, the traditional Chinese medicine extracted sewage in pharmaceutical factories rarely can stably run for a long time during treatment, particularly, when a large amount of organic matters or a large amount of acid and alkali are discharged into a sewage station, a large amount of sewage treatment microorganisms are poisoned and die, so that sewage treatment facilities cannot normally run, the sewage treatment station needs to perform bacterial acclimation and debugging again to continue sewage treatment, and the process needs a period of several months or more, so that the sewage treatment cannot reach the standard for a long time, and the normal production is influenced. Therefore, it is urgently needed to develop a sewage treatment regulating system suitable for natural medicine extraction, so that sewage can be treated efficiently.
Disclosure of Invention
The invention provides a sewage treatment regulating system for natural medicine extraction, which solves the problem that in the prior art, traditional Chinese medicine extraction sewage in a traditional Chinese medicine factory is often poisoned and dead by sewage treatment microorganisms due to the fact that a large amount of organic matters or a large amount of acid and alkali are discharged into a sewage station, and the sewage treatment cannot normally run.
The invention provides a regulating system for treating natural drug extraction sewage, which comprises a grid well, a primary sedimentation tank, a first detection tank, a regulating tank, a second detection tank, a PEIC anaerobic reactor, a contact oxidation tank and a secondary sedimentation tank which are sequentially connected in series;
an acid-base feeding port is formed in the upper end of the first detection tank, and a first COD online detector and a pH online detector are respectively arranged in the first detection tank; a second COD online detector is arranged in the second detection pool;
the sewage treatment regulating system also comprises a transfer tank, the transfer tank is respectively communicated with the first detection tank and the regulating tank, and a third COD online detector is arranged in the transfer tank;
electric control valves are arranged on a connecting pipeline between the primary sedimentation tank and the first detection tank, on a connecting pipeline between the first detection tank and the transfer tank, on a connecting pipeline between the transfer tank and the regulating tank and on a connecting pipeline between the first detection tank and the regulating tank.
Preferably, the adjusting tank is provided with a microbial nutrient feeding port.
Preferably, the adjusting tank and the transfer tank are internally provided with a liquid level automatic measurement display instrument and a submersible stirring pump.
Preferably, a sewage metering pump is arranged on a pipeline between the regulating tank and the transfer tank.
Preferably, the contact oxidation tank is internally provided with an elastic three-dimensional filler, and the bottom of the contact oxidation tank is provided with a rotary mixing aerator.
A second object of the present invention is to provide a method for treating natural drug extraction wastewater using the conditioning system for natural drug extraction wastewater of claim 1, comprising the steps of:
step 1, uniformly collecting natural medicine extraction sewage, allowing the sewage to pass through a grid well, and removing coarse solid impurities in the sewage to obtain grid well effluent;
step 2, allowing the effluent of the grid well to enter a primary sedimentation tank for sedimentation, allowing supernatant of the primary sedimentation tank to enter a first detection tank after sedimentation is carried out for 0.5-2h, and allowing a first COD online detector and a pH online detector arranged in the first detection tank to detect COD and pH values in the sewage online;
when the pH value of the sewage in the first detection tank is detected to be less than 6 or more than 9, putting acid liquor or alkali liquor into the first detection tank by using an acid-base feeding port formed at the upper end of the first detection tank, and adjusting the pH value of the sewage to be 6-9;
when the COD concentration of the sewage in the first detection tank is detected to be more than 2500mg/L, an electric control valve on a communicating pipe between the first detection tank and the transfer tank is opened, so that the sewage in the first detection tank enters the transfer tank for storage;
when the COD concentration in the second detection chamber is less than 2100mg/L, the high-concentration sewage stored in the transfer tank is sent into the regulating tank through the sewage metering pump by an automatic control program;
wherein, the sewage quantity of the high-concentration sewage stored in the transfer tank and sent into the regulating tank is calculated according to the following formula:
setting the online monitoring concentration value of COD in the sewage in the second detection tank as c1, the liquid level height in the regulating tank as h1 and the bottom area of the regulating tank as s1, wherein the volume v1 of the sewage in the regulating tank is h1 × s1, and the total amount w1 of COD in the regulating tank is c1 × v 1;
setting the COD target concentration c2 in the regulating reservoir to be 2500mg/L after the sewage in the transfer reservoir is mixed into the regulating reservoir, transferring the transfer reservoir into the sewage volume v2 in the regulating reservoir, and obtaining the COD on-line monitoring concentration c3 in the transfer reservoir according to the mass conservation principle;
2500×(v1+v2)＝w1+v2×c3,
wherein c1 is obtained by monitoring a second COD online detector, c3 is obtained by monitoring a third COD online detector, and h1 and s1 are obtained by measurement;
calculating a v2 value according to the formula, wherein the v2 is the volume of sewage transferred into the regulating reservoir from the transfer reservoir;
when the COD concentration in the sewage in the first detection tank is detected to be less than or equal to 2500mg/L and the pH value is detected to be 6-9, the sewage in the first detection tank enters an adjusting tank; setting the hydraulic retention time in the regulating reservoir to be 20-24h, and obtaining the effluent of the regulating reservoir after the treatment is finished;
step 3, the effluent of the regulating reservoir enters a PEIC anaerobic reactor, and the internal volume load of the PEIC anaerobic reactor is set to be 10-12 KgCOD/(m)3D), the hydraulic retention time is 6-8h, and effluent of the PEIC anaerobic reactor is obtained after the treatment is finished;
step 4, the effluent of the PEIC anaerobic reactor enters a contact oxidation tank, and the volume load in the contact oxidation tank is 1-2 KgCOD/(m)3D), the hydraulic retention time is 4-6h, and the effluent of the contact oxidation pond is obtained after the treatment;
and 5, allowing the effluent of the catalytic oxidation tank to enter a secondary sedimentation tank for sedimentation, and discharging the supernatant of the secondary sedimentation tank after sedimentation is carried out for 1-2 hours, thus finishing the treatment process.
Preferably, when the COD concentration of the sewage in the regulating tank is detected to be more than or equal to 2500mg/L, feeding the nutrient elements into the regulating tank through a feeding port of the microorganism nutrient elements.
Compared with the prior art, the invention has the beneficial effects that:
1) the first detection tank is arranged for detecting the COD concentration and the pH value on line, when the COD concentration is detected to exceed the standard, sewage is discharged into the transfer tank for temporary storage, and then is mixed into the regulating tank according to a certain amount through calculation to participate in the sewage treatment system, so that the detection index does not exceed the standard, and the normal operation of the subsequent sewage treatment is ensured; when the pH value exceeds the standard, the pH value is maintained at a normal level by adding a neutralizing agent.
2) The invention arranges a second detection tank to detect the COD concentration on line, when the COD concentration is detected to exceed the standard, the water feeding to the subsequent biological aerobic tank is stopped, and simultaneously the water in the second detection tank flows back to the regulating tank, so that the sewage in the system flows in a self-circulation manner, and part of COD can be removed while the water quality is mixed and homogenized. In addition, the poisoning and death of microorganisms in sewage treatment are avoided, the biological activity in a subsequent biochemical treatment device is kept, a sewage treatment system can stably run for a long time, and the sewage treatment is discharged after reaching the standard and the normal production of enterprises is ensured.
3) The sewage treatment regulating system has the advantages of good treatment effect, high efficiency and good stability, and sewage can be discharged after reaching the standard after being treated by the sewage treatment regulating system.
Drawings
FIG. 1 is a process flow diagram of the natural drug extraction wastewater treatment conditioning system of the present invention.
Description of reference numerals:
1-grid well, 2-primary sedimentation tank, 3-first detection tank, 4-regulating tank, 5-second detection tank, 6-PEIC anaerobic reactor, 7-contact oxidation tank, 8-secondary sedimentation tank, 9-acid-base feed inlet, 10-first COD online detector, 11-pH online detector, 12-second COD online detector, 13-transit tank, 14-third COD online detector, 15-electric control valve, 16-microorganism nutrient feed inlet, 17-liquid level automatic measurement display instrument, 18-submersible stirring pump and 19-sewage metering pump.
Detailed Description
In order to make the technical solutions of the present invention better understood and implemented by those skilled in the art, the present invention is further described below with reference to the following specific embodiments and the accompanying drawings, but the embodiments are not meant to limit the present invention.
The experimental methods and the detection methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified.
Example 1
A sewage treatment regulating system for natural drug extraction comprises a grid well 1, a primary sedimentation tank 2, a first detection tank 3, a regulating tank 4, a second detection tank 5, a PEIC anaerobic reactor 6, a contact oxidation tank 7 and a secondary sedimentation tank 8; the grid well 1 is communicated with a primary sedimentation tank 2, the primary sedimentation tank 2 is communicated with a first detection tank 3, the first detection tank 3 is communicated with an adjusting tank 4, the adjusting tank 4 is communicated with a second detection tank 5, the second detection tank 5 is communicated with a PEIC anaerobic reactor 6, the PEIC anaerobic reactor 6 is communicated with a contact oxidation tank 7, and the contact oxidation tank 7 is communicated with a secondary sedimentation tank 8;
an acid-base feeding port 9 is formed in the upper end of the first detection tank 3, and when the pH value in the first detection tank 3 does not meet the requirement, acid liquor or alkali liquor is fed into the first detection tank 3 through the acid-base feeding port 9, and the pH value is adjusted to be 6-9.
A first COD online detector 10 and a pH online detector 11 are respectively arranged in the first detection pool 3; a second COD online detector 12 is arranged in the second detection pool 5; the COD online detector and the pH online detector are arranged to monitor COD concentration and pH value in the detection tank, so that the regulation of the pH value of the sewage and the operation mode of regulating and controlling the sewage are conveniently guided.
The sewage treatment regulating system also comprises a transfer tank 13, the transfer tank 13 is communicated with the first detection tank 3, the transfer tank 13 is also communicated with the regulating tank 4, and a third COD online detector 14 is arranged in the transfer tank 13; the transfer tank 13 can temporarily store the sewage with the COD concentration exceeding the standard in the first detection tank 3, and the sewage is prevented from entering a subsequent biological treatment device to poison microorganisms.
A microorganism nutrient feeding port 16 is formed in the regulating tank 4, a liquid level automatic measuring and displaying instrument 17 and a submersible stirring pump 18 are arranged in the regulating tank 4 and the transfer tank 13, and the liquid level automatic measuring and displaying instrument 17 is used for observing the liquid level heights in the regulating tank 4 and the transfer tank 13 and calculating the volume of sewage in the regulating tank;
all be equipped with dive agitator pump 18 in equalizing basin 4 and the transfer pond 13, dive agitator pump 18's effect lies in forming through the stirring and pushes away the effect and make waste water intensive mixing, plays quality of water homogenization effect, prevents simultaneously that the aquatic suspended solid from deposiing.
A sewage metering pump 19 is arranged on a pipeline between the regulating tank 4 and the transit tank 13;
be provided with 2 layers of three-phase separators in PEIC anaerobic reactor 6, 2 layers of three-phase separators divide into 5 districts according to the function from bottom to top altogether: a mixing zone, a 1 st anaerobic zone, a 2 nd anaerobic zone, a settling zone and a gas-liquid separation zone. The sewage enters from the bottom of the PEIC anaerobic reactor 6, and the granular sludge and the sludge-water mixture returned from the gas-liquid separation zone are effectively mixed in the mixing zone.
The contact oxidation tank 7 is internally provided with an elastic three-dimensional filler, and the bottom of the contact oxidation tank 7 is provided with a rotary mixing aerator;
electric control valves 15 are arranged on a connecting pipeline between the primary sedimentation tank 2 and the first detection tank 3, a connecting pipeline between the first detection tank 3 and the transfer tank 13, a connecting pipeline between the transfer tank 13 and the regulating tank 4 and a connecting pipeline between the first detection tank 3 and the regulating tank 4, and flow of sewage is controlled through the electric control valves 15, so that the sewage enters the corresponding reaction device for treatment.
The sewage treatment regulating system is used for treating the natural medicine extraction sewage so as to explain the using process and the using effect of the invention, wherein the used sewage comes from a certain Chinese medicine factory, the daily treatment capacity of the sewage of the Chinese medicine factory sewage treatment station is 300 tons/day, the actually measured COD concentration fluctuation range is 800mg/L-15000mg/L, the pH value is 5-11, and the water quality fluctuation is large.
The specific operation steps are as follows:
step 1, uniformly collecting natural medicine extraction sewage, allowing the sewage to pass through a grid well 1, and removing coarse solid impurities in the sewage to obtain effluent of the grid well 1;
step 2, enabling effluent of the grid well 1 to enter a primary sedimentation tank 2 for sedimentation, enabling supernatant of the primary sedimentation tank 2 to enter a first detection tank 3 after sedimentation is carried out for 0.5h in the primary sedimentation tank 2, enabling a pH value of sewage to be 4.5-5.5 when a pH online detector 11 arranged in the first detection tank 3 detects that the pH value of the sewage is 4.5-5.5, putting calcium oxide into the first detection tank 3 through an acid-base feeding port 9 formed in the upper end of the first detection tank 3, and adjusting the pH value of the sewage to be 6-9;
meanwhile, when the first COD online detector 10 detects that the fluctuation range of the COD concentration is between 3000mg/L and 8000mg/L, the system automatically opens an electric control valve 15 on a communicating pipe between the first detection pool 3 and the transit pool 13, and sewage in the first detection pool 3 is input into the transit pool 13 for storage;
after a period of time, the first COD online detector 10 detects that the fluctuation range of the COD concentration in the first detection tank 3 is between 800mg/L and 1800mg/L and the pH value is 6 to 9, at the moment, the system automatically closes the electric control valve 15 of the first detection tank 3 and the transfer tank 13, opens the electric control valve 15 between the first detection tank 3 and the regulating tank 4, and sewage enters the regulating tank 4;
in the above time period, the COD concentration detected by the second COD online detector 12 in the second detection pool 5 in the beginning time period is between 2100mg/L and 2500mg/L, the water quality accords with the designed water inlet condition of the PEIC anaerobic reactor 6, and the sewage in the second detection pool 5 enters the PEIC anaerobic reactor 6 to normally operate; then, after a period of time, the second COD online detector 12 detects that the COD concentration is 2000mg/L (< 2100mg/L), at this time, the sewage metering pump 19 between the transfer tank 13 and the regulating tank 4 is automatically started, the high-concentration sewage stored in the transfer tank 13 is sent into the regulating tank 4 through the sewage metering pump 19, wherein the flow rate of the sewage metering pump 19 is 80m3/h；
The amount of the high-concentration sewage stored in the transfer tank 13 and sent to the adjusting tank 4 is calculated according to the following formula:
the COD online monitoring concentration value of the sewage in the second detection pool 5 is c 1-2000 mg/L, the liquid level height in the regulating pool 4 is h 1-1.8 m, and the bottom area of the regulating pool 4 is s 1-100 m2If the volume v1 of the sewage in the regulating tank 4 is h1 xs 1 is 180m3The total COD amount w1 in the regulating tank 4 is c1 Xv 1 is 360000 g;
after the sewage in the transfer tank 13 is mixed into the regulating tank 4, the COD target concentration c2 in the regulating tank 4 is 2500mg/L, the transfer tank 13 is transferred into the regulating tank 4, the sewage volume v2 is added, the concentration monitored by a third COD online detector 14 in the transfer tank 13 is c3, and the sewage is obtained according to the mass conservation principle;
2500×(v1+v2)＝w1+v2×c3，
wherein c1 is 2000mg/L and is monitored by the second COD online detector 12, c3 is 6000mg/L and is monitored by the third COD online detector 14, and h1 and s1 are obtained by measurement;
calculating v 2-25.71 m according to the above formula3V2 is the volume of sewage in the transfer tank 13 transferred into the regulating tank 4, and 25.71m stored in the transfer tank 13 can be obtained after the sewage metering pump 19 runs for about 19min3The high-concentration sewage is sent into a regulating tank 4; the hydraulic retention time of the sewage in the regulating tank 4 is 24 hours, and the effluent of the regulating tank 4 is obtained after the treatment is finished;
step 3, the effluent of the adjusting tank 4 enters PEAn IC anaerobic reactor 6 with internal volume load of 10 KgCOD/(m) in the PEIC anaerobic reactor 63D), the hydraulic retention time is 6h, and effluent of the PEIC anaerobic reactor 6 is obtained after the treatment is finished;
step 4, effluent of the PEIC anaerobic reactor 6 enters a contact oxidation tank 7, and the internal volume load of the contact oxidation tank 7 is 1 KgCOD/(m)3D), the hydraulic retention time is 4h, and water discharged from the contact oxidation pond 7 is obtained after the treatment is finished;
and 5, allowing the effluent of the catalytic oxidation tank 7 to enter a secondary sedimentation tank 8 for sedimentation, and after 2 hours of sedimentation, discharging the supernatant of the secondary sedimentation tank 8 after reaching the standard, thus finishing the treatment process.
Example 2
The treatment regulation system for natural drug extraction wastewater used in example 2 was the same as in example 1, and the wastewater treated in example 2 was the same as in example 1.
The specific operation steps are as follows:
step 1, uniformly collecting natural medicine extraction sewage, allowing the sewage to pass through a grid well 1, and removing coarse solid impurities in the sewage to obtain effluent of the grid well 1;
step 2, enabling effluent of the grid well 1 to enter a primary sedimentation tank 2 for sedimentation, enabling supernatant of the primary sedimentation tank 2 to enter a first detection tank 3 after sedimentation is carried out for 2 hours in the primary sedimentation tank 2, enabling a pH value of sewage to be 4.6-5.8 detected by a pH online detector 11 arranged in the first detection tank 3, putting calcium oxide into the first detection tank 3 by utilizing an acid-base feeding port 9 formed in the upper end of the first detection tank 3, and adjusting the pH value of the sewage to be 6-9;
meanwhile, when the first COD online detector 10 detects that the fluctuation range of the COD concentration is 4000mg/L-10000mg/L, the system automatically opens an electric control valve 15 on a communicating pipe between the first detection pool 3 and the transit pool 13, and the sewage in the first detection pool 3 is input into the transit pool 13 for storage;
after 1 hour, the first COD online detector 10 detects that the fluctuation range of the COD concentration in the first detection tank 3 is between 700mg/L and 1850mg/L, the pH value is 6 to 9, at the moment, the system automatically closes the electric control valve 15 of the first detection tank 3 and the transfer tank 13, opens the electric control valve 15 between the first detection tank 3 and the adjusting tank 4, and sewage enters the adjusting tank 4;
in the above time period, the COD concentration detected by the second COD online detector 12 in the second detection pool 5 in the beginning time period is between 2100mg/L and 2500mg/L, the water quality accords with the designed water inlet condition of the PEIC anaerobic reactor 6, and the sewage in the second detection pool 5 enters the PEIC anaerobic reactor 6 to normally operate;
subsequently, the second COD online detector 12 detects that the COD concentration is 2050mg/L (< 2100mg/L), at this time, the sewage metering pump 19 between the transfer tank 13 and the adjusting tank 4 is automatically started, the high-concentration sewage stored in the transfer tank 13 is sent into the adjusting tank 4 through the sewage metering pump 19, wherein the flow of the sewage metering pump is 80m3/h；
The amount of the high-concentration sewage stored in the transfer tank 13 and sent to the adjusting tank 4 is calculated according to the following formula:
the COD online monitoring concentration value of the sewage in the second detection pool 5 is c 1-2050 mg/L, the liquid level height in the regulating pool 4 is h 1-2 m, and the bottom area of the regulating pool 4 is s 1-100 m2If the volume v1 of the sewage in the regulating tank 4 is h1 xs 1 is 200m3The total COD amount w 1-c 1 Xv 1-410000 g in the regulating tank 4;
after the sewage in the transfer tank 13 is mixed into the regulating tank 4, the COD target concentration c2 in the regulating tank 4 is 2500mg/L, the transfer tank 13 is transferred into the regulating tank 4, the sewage volume v2 is added, the concentration monitored by a third COD online detector 14 in the transfer tank 13 is c3, and the sewage is obtained according to the mass conservation principle;
2500×(v1+v2)＝w1+v2×c3，
wherein c1 is 2050mg/L and is monitored by the second COD online detector 12, c3 is 8000mg/L and is monitored by the third COD online detector 14, and h1 and s1 are measured;
the above formula calculates v 2-16.36 m3V2 is the volume of sewage in the transfer tank 13 transferred into the regulating tank 4, and the sewage metering pump 19 can store 16.36m in the transfer tank 13 after running for about 12min3The high-concentration sewage is sent into a regulating tank 4; the hydraulic retention time of the sewage in the regulating tank 4 is 20h, and the effluent of the regulating tank 4 is obtained after the treatment is finished;
step 3, the effluent of the regulating reservoir 4 enters a PEIC anaerobic reactor 6, and the internal volume load of the PEIC anaerobic reactor 6 is set to be 12 KgCOD/(m)3D), the hydraulic retention time is 8 hours, and effluent of the PEIC anaerobic reactor 6 is obtained after the treatment is finished;
step 4, effluent of the PEIC anaerobic reactor 6 enters a contact oxidation tank 7, and the internal volume load of the contact oxidation tank 7 is 2 KgCOD/(m)3D), the hydraulic retention time is 6h, and the effluent of the contact oxidation pond 7 is obtained after the treatment is finished;
and 5, allowing the effluent of the catalytic oxidation tank 7 to enter a secondary sedimentation tank 8 for sedimentation, and discharging the supernatant of the secondary sedimentation tank 8 after sedimentation is carried out for 1h, thus finishing the treatment process.
It should be noted that when the COD concentration of the sewage in the regulating tank 4 is detected to be more than or equal to 2500mg/L, nutrient elements are added into the regulating tank 4 through the microorganism nutrient element feeding port 16.
The natural medicine extraction sewage in the embodiment 1 and the embodiment 2 is from a pharmaceutical factory, the production process comprises an alcohol extraction process and a water extraction process, the embodiment 1 and the embodiment 2 have a good treatment effect on the natural medicine extraction sewage, and the specific treatment results are shown in tables 1-2.
TABLE 1 effect of wastewater treatment in example 1
Figure BDA0001526586310000101
As can be seen from Table 1, after the natural drug extraction wastewater is treated by the wastewater conditioning treatment system in the embodiment 1, the COD concentration in the final effluent is 55mg/L, the BOD concentration is 18mg/L, and the SS concentration is 41mg/L, which satisfy the standard of Table 2 in the discharge Standard of extracted pharmaceutical industry Water pollutants (GB21905-2008), and the total removal rate of COD is 97.8%, the total removal rate of BOD is 98.5%, and the total removal rate of SS is 86.3%.
TABLE 2 effect of wastewater treatment in example 2
Figure BDA0001526586310000102
Figure BDA0001526586310000111
As can be seen from Table 2, after the natural medicine extraction sewage is treated by the sewage conditioning treatment system in the embodiment 2, the COD concentration in the final effluent is 48mg/L, the BOD concentration is 16mg/L, and the SS concentration is 35mg/L, which meet the standard of Table 2 in the discharge Standard of extracted pharmaceutical industry Water pollutants (GB21905-2008), and the total removal rate of COD is 98.1%, the total removal rate of BOD is 98.6%, and the total removal rate of SS is 89.5%, so that the treatment effect is good, and the efficiency is high.
In addition, the invention arranges the transfer tank to regulate and control the COD concentration and the pH value in the sewage entering each reaction device, so that the COD concentration meets the design requirement of each reaction device, thereby avoiding the generation of poison and impact on microorganisms in the reaction devices, ensuring good stability and being beneficial to the normal operation of the sewage treatment device.
It should be noted that when the following claims refer to numerical ranges, it should be understood that both ends of each numerical range and any value between the two ends can be selected, and since the steps and methods used are the same as those in embodiments 1-2, the preferred embodiments of the present invention have been described for the purpose of preventing redundancy, but once the basic inventive concept is known, those skilled in the art can make other changes and modifications to these embodiments. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that such changes and modifications be included within the scope of the appended claims and their equivalents.

Claims (4)

1. A treatment and regulation system for natural drug extraction sewage is characterized by comprising a grid well (1), a primary sedimentation tank (2), a first detection tank (3), a regulation tank (4), a second detection tank (5), a PEIC anaerobic reactor (6), a contact oxidation tank (7) and a secondary sedimentation tank (8) which are sequentially connected in series;
an acid-base feeding port (9) is formed in the upper end of the first detection tank (3), and a first COD online detector (10) and a pH online detector (11) are respectively arranged in the first detection tank (3); a second COD online detector (12) is arranged in the second detection pool (5);
the sewage treatment regulating system also comprises a transfer tank (13), the transfer tank (13) is respectively communicated with the first detection tank (3) and the regulating tank (4), and a third COD online detector (14) is arranged in the transfer tank (13);
electric control valves (15) are arranged on a connecting pipeline between the primary sedimentation tank (2) and the first detection tank (3), a connecting pipeline between the first detection tank (3) and the transfer tank (13), a connecting pipeline between the transfer tank (13) and the adjusting tank (4) and a connecting pipeline between the first detection tank (3) and the adjusting tank (4); a sewage metering pump (19) is arranged on a pipeline between the regulating tank (4) and the transfer tank (13);
when the COD concentration of the sewage in the first detection tank (3) is detected to be more than 2500mg/L, an electric control valve (15) on a communicating pipe between the first detection tank (3) and the transfer tank (13) is opened, so that the sewage in the first detection tank (3) enters the transfer tank (13) for storage;
when COD in the sewage in the first detection tank (3) is detected to be less than or equal to 2500mg/L and the pH value is detected to be 6-9, the sewage in the first detection tank (3) enters the regulating tank (4);
when the COD concentration in the second detection tank (5) is detected to be less than 2100mg/L, the high-concentration sewage stored in the transfer tank (13) is sent into the adjusting tank (4) through the sewage metering pump (19) by an automatic control program;
when the COD concentration in the second detection pool (5) is detected to be between 2100mg/L and 2500mg/L, the sewage in the second detection pool (5) enters a PEIC anaerobic reactor (6);
a microbial nutrient feeding port (16) is formed in the adjusting tank (4); when the COD concentration of the sewage in the adjusting tank (4) is detected to be more than or equal to 2500mg/L, nutrient elements are added into the adjusting tank (4) through a microorganism nutrient element feeding port (16).
2. The sewage treatment and regulation system for natural drug extraction according to claim 1, wherein the regulation tank (4) and the transfer tank (13) are both provided with a liquid level automatic measurement display instrument (17) and a submersible stirring pump (18).
3. The sewage treatment and conditioning system for natural medicine extraction according to claim 1, wherein the contact oxidation tank (7) is internally provided with an elastic three-dimensional filler, and the bottom of the contact oxidation tank (7) is provided with a rotary mixing aerator.
4. A method for treating natural drug extraction wastewater using the natural drug extraction wastewater treatment regulation system of claim 1, comprising the steps of:
step 1, uniformly collecting natural medicine extraction sewage, allowing the sewage to pass through a grid well (1), and removing coarse solid impurities in the sewage to obtain effluent of the grid well (1);
step 2, enabling effluent of the grid well (1) to enter a primary sedimentation tank (2) for sedimentation, after sedimentation is carried out in the primary sedimentation tank (2) for 0.5-2h, enabling supernatant of the primary sedimentation tank (2) to enter a first detection tank (3), and enabling a first COD online detector (10) and a pH online detector (11) arranged in the first detection tank (3) to detect COD and pH values in sewage online;
when the pH value of the sewage in the first detection pool (3) is less than 6 or more than 9, acid liquor or alkali liquor is fed into the first detection pool (3) by utilizing an acid-base feeding port (9) formed at the upper end of the first detection pool (3), and the pH value of the sewage is adjusted to be 6-9;
when the COD concentration of the sewage in the first detection tank (3) is detected to be more than 2500mg/L, an electric control valve (15) on a communicating pipe between the first detection tank (3) and the transfer tank (13) is opened, so that the sewage in the first detection tank (3) enters the transfer tank (13) for storage;
when the COD concentration in the second detection tank (5) is detected to be less than 2100mg/L, the high-concentration sewage stored in the transfer tank (13) is sent into the adjusting tank (4) through the sewage metering pump (19) by an automatic control program;
wherein, the sewage quantity of the high-concentration sewage stored in the transfer tank (13) and sent into the regulating tank (4) is calculated according to the following formula:
setting the online monitoring concentration value of COD of the sewage in the second detection tank (5) as c1, the liquid level height in the regulating tank (4) as h1, and the bottom area of the regulating tank (4) as s1, wherein v1 is h1 × s1 of the volume of the sewage in the regulating tank (4), and w1 is c1 × v1 of the total amount of COD in the regulating tank (4);
setting the COD target concentration c2 in the regulating reservoir (4) to be 2500mg/L after the sewage in the transfer reservoir (13) is mixed into the regulating reservoir (4), transferring the transfer reservoir (13) into the sewage volume v2 in the regulating reservoir (4), and obtaining the COD on-line monitoring concentration c3 in the transfer reservoir (13) according to the mass conservation principle;
2500×(v1+v2)＝w1+v2×c3，
wherein c1 is obtained by monitoring a second COD online detector (12), c3 is obtained by monitoring a third COD online detector (14), and h1 and s1 are obtained by measurement;
calculating a v2 value according to the formula, wherein the v2 is the volume of sewage in the transfer tank (13) transferred into the regulating tank (4);
when COD in the sewage in the first detection tank (3) is detected to be less than or equal to 2500mg/L and the pH value is detected to be 6-9, the sewage in the first detection tank (3) enters the regulating tank (4);
setting the hydraulic retention time in the regulating reservoir (4) to be 20-24h, and obtaining the effluent of the regulating reservoir (4) after the treatment is finished;
step 3, the effluent of the regulating tank (4) enters a PEIC anaerobic reactor (6), and the internal volume load of the PEIC anaerobic reactor (6) is set to be 10-12Kg COD/(m)3D), the hydraulic retention time is 6-8h, and effluent of the PEIC anaerobic reactor (6) is obtained after the treatment is finished;
step 4, the effluent of the PEIC anaerobic reactor (6) enters a contact oxidation tank (7), and the internal volume load of the contact oxidation tank (7) is 1-2 KgCOD/(m)3D), the hydraulic retention time is 4-6h, and water discharged from the contact oxidation pond (7) is obtained after the treatment;
and 5, allowing the effluent of the catalytic oxidation tank (7) to enter a secondary sedimentation tank (8) for sedimentation, and discharging the supernatant of the secondary sedimentation tank (8) after 1-2h of sedimentation, thus finishing the treatment process.
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CN101717168A (en) * 2009-12-07 2010-06-02 贵州绿色环保设备工程有限责任公司 Method for treating wastewater in glycol production
JP5158623B2 (en) * 2007-03-19 2013-03-06 小清水町農業協同組合 Wastewater treatment method in potato starch production process
CN103319058A (en) * 2013-07-18 2013-09-25 山东太平洋环保有限公司 Traditional Chinese medicine extraction wastewater treatment system and technology
CN103553212A (en) * 2013-11-20 2014-02-05 唐一 Biological treatment process of high-formaldehyde and high-concentration organic wastewater
CN107344733A (en) * 2017-06-26 2017-11-14 太原市淼洁环保技术有限公司 One kind on-line monitoring protecting against shock system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5158623B2 (en) * 2007-03-19 2013-03-06 小清水町農業協同組合 Wastewater treatment method in potato starch production process
CN101717168A (en) * 2009-12-07 2010-06-02 贵州绿色环保设备工程有限责任公司 Method for treating wastewater in glycol production
CN103319058A (en) * 2013-07-18 2013-09-25 山东太平洋环保有限公司 Traditional Chinese medicine extraction wastewater treatment system and technology
CN103553212A (en) * 2013-11-20 2014-02-05 唐一 Biological treatment process of high-formaldehyde and high-concentration organic wastewater
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Effective date of registration: 20210330

Address after: No. 936, Mudan street, Chaoyang District, Changchun City, Jilin Province

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Patentee before: Zhang Qiusheng