WO2022116453A1 - Method and apparatus for bio-enhanced treatment of coal gasification wastewater - Google Patents

Method and apparatus for bio-enhanced treatment of coal gasification wastewater Download PDF

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Publication number
WO2022116453A1
WO2022116453A1 PCT/CN2021/084900 CN2021084900W WO2022116453A1 WO 2022116453 A1 WO2022116453 A1 WO 2022116453A1 CN 2021084900 W CN2021084900 W CN 2021084900W WO 2022116453 A1 WO2022116453 A1 WO 2022116453A1
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tank
coal gasification
nutrient solution
gasification wastewater
enhanced treatment
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PCT/CN2021/084900
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French (fr)
Chinese (zh)
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吴大利
徐燕京
郑瑞印
方明
黄勤超
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麦王环境技术股份有限公司
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Priority claimed from CN202011401799.7A external-priority patent/CN112520945B/en
Priority claimed from CN202022866884.2U external-priority patent/CN213803420U/en
Application filed by 麦王环境技术股份有限公司 filed Critical 麦王环境技术股份有限公司
Publication of WO2022116453A1 publication Critical patent/WO2022116453A1/en

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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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • 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
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M1/00—Apparatus for enzymology or microbiology

Definitions

  • the invention relates to the field of wastewater treatment, in particular to a method and device for biologically enhanced treatment of coal gasification wastewater.
  • Nitrifying bacteria are a class of autotrophic chemo-energy bacteria with nitrification, including two physiological flora, nitrite bacteria and nitrate bacteria.
  • the nitrifying bacteria have a long generation cycle and are sensitive to dissolved oxygen, water temperature, and toxic substances. It plays a crucial role in the process of denitrification. Without nitrification, denitrification and denitrification cannot be carried out. However, the content of activated sludge in common sewage treatment systems is relatively low. Therefore, the nitrification capacity is directly related to sewage treatment. Whether the project site can operate normally and whether the water can reach the standard.
  • the nitrifying bacteria activated sludge enrichment method is used to solve the above problems.
  • the enrichment rate is slow, the enrichment period is long, and the The concentration of nitrifying bacteria is lower and the storage cost is higher.
  • Chinese patent CN201210014634.3 discloses a method and device for rapidly enriching ammonia oxidizing bacteria.
  • the sequencing batch activated sludge method is mainly used for enrichment by gradually increasing the concentration of ammonia nitrogen in the culture solution and controlling the pH process.
  • the culturing method controls the steps of water inflow, alkali addition, aeration, alkali addition, aeration, reflux, sedimentation, drainage and idleness through a programmable process controller.
  • the disadvantage of this method is that the culture period is too long.
  • Chinese patent CN201410731184.9 discloses a nitrifying bacteria enrichment culture device and a culture method.
  • the device is enriched by setting a ceramic membrane inner cylinder as a nitrifying bacteria culture unit in the reactor, and gradually increasing the ammonia nitrogen concentration in the culture solution and the method of pH process control.
  • the removal rate of ammonia nitrogen reaches more than 90%, the aeration is stopped, the sewage is filtered to collect the sludge, and the total cycle of cultivating a batch is 134 hours.
  • This method still has problems such as long culture period, low degree of automation, and inability to continuously run and add nitrifying bacteria.
  • the technical problem to be solved by the present invention is to provide a biological enhancement treatment method and device for coal gasification wastewater, which can rapidly reduce ammonium nitrogen in industrial wastewater.
  • the present invention provides a method for bio-enhancing treatment of coal gasification wastewater, comprising the following steps: S1: adding a nutrient solution to a culture tank, inoculating activated sludge from a biochemical tank, stirring at a preset first rotational speed, and controlling dissolved oxygen to be 2-3mg/L, PH is 7.5-8.0, temperature is C1, continuous culture for the first preset time (for example, three weeks), and quantitative nutrient solution 1 is added at regular intervals during the culture process; S2: The culture tank is added with nutrients Liquid 2, stir at the preset second rotation speed, and control the dissolved oxygen to be 3-4mg/L, the pH to be 8.0-8.5, and the temperature to be C2, and continuously cultivate for the second preset time.
  • the temperature C2 is greater than the temperature C1.
  • the first rotational speed is 90 revolutions per minute
  • the second rotational speed is 110 revolutions per minute.
  • the culture end point is that the total number of bacteria per milliliter of culture solution reaches a preset value.
  • the nutrient solution one comprises ammonium sulfate 0.5-5 g/L, magnesium sulfate 0.1-1 g/L, sodium dihydrogen phosphate 0.1-3 g/L, dipotassium hydrogen phosphate 0.1-6 g/L, ferrous sulfate 0.05-0.5 g /L, manganese sulfate 0.03 ⁇ 0.1g/L; calcium carbonate 0.5 ⁇ 5g/L and water 1000ml.
  • the composition of the second nutrient solution includes basic nutrient elements, complex organic nitrogen nutrition and trace elements.
  • the basic nutrients include ammonium sulfate 0.1-2 g/L, sodium bicarbonate 2.0-2.5 g/L; potassium dihydrogen phosphate 0.005-0.008 g/L; calcium chloride 0.4-0.8 g/L; magnesium sulfate 0.3 ⁇ 0.4g/L; ferrous sulfate 0.020 ⁇ 0.025g/L; EDTA 0.028 ⁇ 0.032g/L, compound organic nitrogen nutrition 20 ⁇ 50ml/L and trace elements 0.8 ⁇ 1.2mL/L.
  • the compound organic nitrogen nutrition comprises corn steep liquor, soybean meal hydrolyzate and yeast powder, and the preparation ratio is 2:1:0.5-1.
  • the trace elements include manganese chloride 850-950 mg/L; EDTA 1300-1400 mg/L; zinc sulfate 350-450 mg/L; copper sulfate 200-250 mg/L; cobalt chloride 200-250 mg /L; sodium molybdate 180-220 mg/L; sodium selenate 80-120 mg/L; nickel chloride 150-200 mg/L; boric acid 10-15 mg/L.
  • the present invention also provides a bio-enhanced treatment device for coal gasification wastewater, which adopts any one of the above-mentioned bio-enhanced treatment methods for coal gasification wastewater.
  • the device includes an enrichment culture tank, a pH adjustment solution tank and a nutrient solution tank.
  • the culture tank is provided with an aeration system for providing oxygen required in the culture process, a temperature control subsystem for temperature control, a PH adjustment subsystem and a stirring subsystem for PH control, and an air conditioner for controlling the culture liquid.
  • the liquid that reaches the culture target is discharged from the enrichment culture tank through the bacterial liquid delivery pump.
  • the present invention also provides a bio-enhanced treatment device for coal gasification wastewater, which comprises:
  • the enrichment culture tank is communicated with the pH adjustment solution tank through the pH delivery pump, and the nutrient solution tank is communicated with the enrichment culture tank through the nutrient solution delivery pump,
  • the enrichment culture tank is provided with: an aeration system for providing oxygen required in the cultivation process, a temperature control subsystem for controlling the temperature in the enrichment culture tank, and a stirrer for stirring the bacterial liquid in the body. system, a nutrient solution dosing subsystem for controlling the delivery rate of the culture solution,
  • the liquid that reaches the culture target is discharged from the enrichment culture tank through the bacterial liquid delivery pump.
  • the present invention can effectively improve the ammonia nitrogen load, thereby reducing sludge concentration, sludge discharge, and sludge disposal costs;
  • the selected microorganisms have been fully adapted to the original water quality and have strong adaptability; this method is not only used for the removal of ammonia nitrogen bio-enhancement process, but also can be used for secondary development in special environments or other substances removal on this basis. biofortification process.
  • FIG. 1 is a schematic structural diagram of an embodiment of a coal gasification wastewater bio-enhanced treatment device of the present invention.
  • FIG. 2 is a schematic flow chart of the biological enhancement treatment method for coal gasification wastewater according to the present invention.
  • the present invention provides a bio-enhanced treatment device for coal gasification wastewater, please refer to FIG. 1 , the device includes an enrichment culture tank 5, a pH adjustment solution tank 6, and a first tank 7 for containing nutrient solution 1 and a nutrient solution tank 7.
  • the second tank 8 of liquid two the enrichment culture tank 5 is provided with an aeration system for providing oxygen required in the cultivation process, a temperature control subsystem for temperature control, and a pH adjustment subsystem for pH control and stirring subsystem 11, as well as the nutrient solution dosing subsystem for controlling the delivery rate of the culture solution, the inoculation and bacterial solution delivery subsystem and the automatic control system, the enrichment culture tank 5 is connected with the pH adjustment solution by the pH adjustment delivery pump 22
  • the tank 6 is communicated, and the nutrient solution tank is communicated with the enrichment culture tank 5 through the nutrient solution delivery pump, and the liquid that reaches the cultivation target is discharged from the enrichment culture tank 5 through the bacterial solution delivery pump.
  • the present application proposes a bio-enhanced treatment device for coal gasification wastewater, which includes: an enrichment culture tank, the enrichment culture tank has a body, and the body is provided with: a driving component and a first port, which is connected to a nutrient solution through a pipeline.
  • the first tank and the second port are connected to the second tank containing the nutrient solution two through the pipeline, the pH adjustment solution feeding port, which is connected to the pH adjustment solution tank through the pipeline, and the temperature sensor, which is electrically connected to the temperature control module,
  • the body is equipped with: an aeration module, which is used to provide oxygen required in the culturing process, and a stirring device, which includes a drive shaft and a paddle
  • the drive shaft partially penetrates the body and is connected to the drive component. At least two groups of paddles are spaced on the drive shaft.
  • the drive shaft rotates and drives the paddles on it to rotate based on the drive of the drive component.
  • the coal gasification wastewater biological enhancement treatment device is also equipped with a control module, which is used to control the operation of the coal gasification wastewater biological enhancement treatment device.
  • the first port and the second port can be combined into a nutrient solution feeding port.
  • This coal gasification wastewater bio-enhanced treatment device comprises: an enrichment culture tank 5, and the enrichment culture tank 5 has a body 5a, and the body 5a is provided with a nutrient solution feeding port a, which is respectively connected to the first place containing the nutrient solution a through pipelines
  • the tank 7 and the second tank 8 containing the nutrient solution two, the pH adjustment solution adding port b, is connected to the pH adjustment solution tank through the pipeline, and the body 5a is provided with an aeration module (also an aeration module for providing oxygen required in the culturing process).
  • aeration system not shown
  • a thermometer 14 which is electrically connected to a temperature control module (not shown) to control the temperature of the enrichment culture tank 5
  • a stirring device 11 which includes a drive shaft and a paddle 5b , the drive shaft partially penetrates the body 5a to connect to the drive component M, and at least two groups of paddles 5b are arranged on the drive shaft at intervals.
  • the three sets of paddles are generally located at the upper, middle and lower parts of the body. This improves the accuracy of stirring.
  • the stirring device is driven by a motor or a combination of a motor and a frequency converter, which can fully ensure that various substances, temperature, oxygen, etc. reach an ideal homogeneous state during the cultivation process.
  • the stirring device 11 also has the function of adjusting the pH.
  • the enrichment culture tank 5 is communicated with the pH adjustment solution tank 6 through the pH adjustment delivery pump 22, and the nutrient solution tank is communicated with the enrichment culture tank 5 through the nutrient solution delivery pump, and the liquid that reaches the culture target is discharged through the bacterial liquid delivery pump for enrichment culture.
  • Tank 5 The aeration system includes a public air source, an air flow meter, a culture tank aeration pipe, a dissolved oxygen meter 12, etc., mainly to provide the oxygen needed in the culture process, so that the oxygen can be used efficiently.
  • the temperature control module includes a water source, a temperature control water tank 4, a temperature control jacket of a culture tank, a thermometer 14, etc., to ensure that the temperature is controlled within a suitable temperature range during the culture process.
  • the pH adjustment system includes acid/alkali storage tank, dosing metering pump, pH meter 13, etc., to ensure that the pH is controlled within a suitable temperature range during the cultivation process.
  • a nutrient solution-transporting pump (23) is connected to a first tank (7) containing the nutrient solution-1 through a pipeline, and the nutrient solution-1 is injected into the enrichment culture tank (5) based on the control of the control module.
  • the second nutrient solution delivery pump (24) is connected to the second tank (8) containing the second nutrient solution through a pipeline, and the second nutrient solution is injected into the enrichment culture tank (5) based on the control of the control module.
  • the bottom of the body is equipped with a bacterial liquid output port c, which is connected to the front end of the aerobic tank through pipes and valves.
  • the top part of the body is provided with a mud inlet d, which is connected to the end of the aerobic tank through a pipeline.
  • the stirring device is configured with a first working mode and a second working mode, and the rotating speed is 90 per minute when in the first working module, and 120 per minute when it is in the second working module.
  • the above-mentioned coal gasification wastewater bio-enhanced treatment device also includes a nutrient solution dosing subsystem, which includes a storage tank, a dosing metering pump, etc., by adjusting the delivery rate of the nutrient solution to meet the various nutrients required for bacterial growth during the cultivation process.
  • Inoculation and bacteria liquid delivery subsystem which includes two parts, one is the sludge inoculation system, which adds activated sludge from the biochemical tank body to the culture tank through the delivery pump; the other is the nitrifying bacteria liquid delivery system, which will reach the The nitrifying bacteria of the culture target are transported and fed into the biochemical tank.
  • the automatic control system is used to connect with the above-mentioned metering instruments, acid/alkali metering pumps, temperature control tank valves, transfer pumps, motors, etc. Operating values and manipulations can be displayed on the control panel.
  • the present invention also provides a biological enhancement treatment method for coal gasification wastewater, please refer to FIG. 2 , the method includes the following steps:
  • the nutrient solution 1 is added to the culture tank, the activated sludge from the biochemical tank is inoculated, stirred at the preset first rotation speed, and the dissolved oxygen is controlled to 2-3mg/L, PH 7.5-8.0, and the temperature is 30°C.
  • a first preset time eg, three weeks
  • a quantitative nutrient solution at regular intervals (eg, 5-7 days) during the culturing process.
  • the first preset time is three weeks, and in other embodiments, it can be finely adjusted according to occasions.
  • the nutrient solution II is added to the culture tank, stirred at a preset second rotational speed, and controlled to dissolve oxygen 3-4 mg/L, pH 8.0-8.5, and temperature to 35°C, and continuously cultivate for a second preset time (eg, 2-3 days), when the culture end point is reached, the cultured bacterial liquid is added to the biochemical system according to the preset ratio (95% volume).
  • the second preset time may be finely adjusted according to occasions. This maximizes the use of cultured bacteria.
  • the third stage use the remaining 5% bacterial solution as the source of inoculation, add a quantitative nutrient solution 2, and re-cultivate according to the control conditions of the second stage for 2-3 days. repeatedly.
  • the first rotational speed is 90 revolutions per minute
  • the second rotational speed is 110 revolutions per minute.
  • the culture end point is when the total number of bacteria per milliliter of culture solution reaches a preset value. In one embodiment, the culture end point is to detect the total number of bacteria in each milliliter of culture solution of 1 ⁇ 10 8 to 1 ⁇ 10 9 .
  • the first nutrient solution includes: ammonium sulfate 0.5-5 g/L, magnesium sulfate 0.1-1 g/L, sodium dihydrogen phosphate 0.1-3 g/L, dipotassium hydrogen phosphate 0.1-6 g/L, ferrous sulfate 0.05 ⁇ 0.5g/L, manganese sulfate 0.03 ⁇ 0.1g/L; calcium carbonate 0.5 ⁇ 5g/L and water 1000ml.
  • the composition of nutrient solution II includes: basic nutrients, complex organic nitrogen nutrition and trace elements.
  • the basic nutrients include ammonium sulfate 0.1-2 g/L, sodium bicarbonate 2.0-2.5 g/L; potassium dihydrogen phosphate 0.005-0.008 g/L; calcium chloride 0.4-0.8 g/L; magnesium sulfate 0.3-0.4 g/L; ferrous sulfate 0.020 ⁇ 0.025g/L; ethylenediaminetetraacetic acid 0.028 ⁇ 0.032g/L, compound organic nitrogen nutrition 20 ⁇ 50ml/L and trace elements 0.8 ⁇ 1.2mL/L.
  • the compound organic nitrogen nutrition includes corn steep liquor, soybean meal hydrolyzate and yeast powder, and the preparation ratio is 2:1:0.5-1.
  • the trace elements include manganese chloride 850-950 mg/L; EDTA 1300-1400 mg/L; zinc sulfate 350-450 mg/L; copper sulfate 200-250 mg/L; cobalt chloride 200-250 mg/L; Sodium molybdate 180-220mg/L; sodium selenate 80-120mg/L; nickel chloride 150-200mg/L; boric acid 10-15mg/L.
  • the present invention applies the above-mentioned coal gasification wastewater biological enhancement treatment device to realize the coal gasification wastewater biological enhancement treatment method includes the following specific steps:
  • the nutrient solution one is injected into the enrichment culture tank 50.4m by the nutrient solution one delivery pump 23, so that the final ammonia nitrogen concentration reaches 600mg/L;
  • the dissolved oxygen is continuously monitored and controlled to be 2-3 mg/L, the pH to be 7.5-8.0, and the temperature to be 30° C. by connecting the dissolved oxygen meter 12, PH meter 13, and thermometer 14 online;
  • the signal of 12 is fed back to the automatic control system, and the air flow is controlled by PLC, and the air flow is controlled by the solenoid valve 25 to adjust the air flow to maintain the dissolved oxygen value of 2-3mg/L;
  • the signal of the PH meter 13 is fed back to the automatic control system, and passed
  • the PLC controls the pH adjustment delivery pump 22 to add the 5% sodium bicarbonate solution of the pH adjustment liquid tank 6 to the enrichment culture tank 5 to maintain pH 7.5-8.0;
  • the signal of the thermometer 14 is fed back to the automatic control system and the temperature control is controlled by the PLC Water tank 4, tap water solenoid valve one 16, tap water solenoid valve two 17, variable temperature water solenoid valve 18, constantly switch the cold/hot water state, so as to achieve the cultivation temperature of the control culture tank
  • nutrient solution-0.1-0.15m 3 is pumped into nutrient solution through nutrient solution-transport pump 23 every other week;
  • the first stage was continuously cultivated for three weeks;
  • dissolved oxygen, pH, temperature control method refer to the first stage control method
  • the second stage is continuously cultivated for 2-3 days;
  • the end point of the culture is to detect the total number of bacteria in each milliliter of culture medium from 1 ⁇ 10 8 to 1 ⁇ 10 9 ;
  • Steps (9)-(14) are repeated, and the cycle is performed.
  • the wastewater biochemical treatment system of the present invention adopts the A/O process.
  • the influent COD is usually between 550 and 800 mg/L, and the ammonia nitrogen value is between 200 and 250 mg/L. In other embodiments, it even far exceeds the above range; the effluent requires COD to be lower than 500 mg/L and ammonia nitrogen to be lower than 50 mg/L. .
  • the nitrifying bacteria are cultivated in advance, and after about 2 weeks of domestication and cultivation, the treated water volume and the drainage index can meet the technological requirements.
  • the gasification grey water temperature is high (over 45°C), and it needs to go through a heat exchanger to reduce the water temperature to below 37°C.
  • the accident of the inlet water temperature of 37-42 °C occasionally occurs, resulting in a sharp decline in the heat treatment capacity of the biochemical system.
  • the water temperature after the water temperature returns to normal, it generally takes 1-2 weeks of re-addition of sludge for culture to return to normal, and the present invention usually returns to normal in 2-4 days. And it can solve the problem that the ammonia nitrogen value of the influent water is too high ( ⁇ 250mg/L), and it is easy to cause the problem that the effluent index does not meet the standard in a short time.
  • the beneficial effects of the present invention are as follows: when the biochemical system is strongly impacted by high inlet water temperature, high ammonia nitrogen value, etc., the present invention returns to normal in 2-3 days, avoiding violent fluctuations during operation, and affecting the substandard effluent index; the present invention can effectively Increase the ammonia nitrogen load of the treatment, thereby reducing the sludge concentration, reducing the sludge discharge, and reducing the cost of sludge disposal; reducing the cost of use; and because the inoculation comes from the sewage biochemical system, the selected microorganisms have been fully adapted to the original water quality, with strong adaptability; this method is not only used to remove ammonia nitrogen bio-enhancement process, but also can be used for secondary development of bio-enhancement process for special environment or other substances removal on this basis.

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Abstract

The present invention provides a method and apparatus for bio-enhanced treatment of coal gasification wastewater. The apparatus comprises an enrichment culture tank, a PH adjustment solution tank, and a nutrient solution tank; and the enrichment culture tank is provided with an aeration system for providing oxygen required in the culture process, a temperature control subsystem for controlling the temperature, a PH adjustment subsystem and a stirring subsystem for controlling the PH, and a nutrient solution dosing subsystem, an inoculation and bacteria solution conveying subsystem, and an automatic control system for controlling the conveying rate of a culture solution. According to the present invention, the treatment on an ammonia nitrogen load can be effectively improved, thereby reducing the sludge concentration, reducing the sludge discharge amount, and reducing the sludge disposal cost.

Description

一种煤气化废水生物强化处理方法和装置Method and device for bio-enhanced treatment of coal gasification wastewater 技术领域technical field
本发明涉及废水处理领域，特别涉及一种煤气化废水生物强化处理方法和装置。The invention relates to the field of wastewater treatment, in particular to a method and device for biologically enhanced treatment of coal gasification wastewater.
背景技术Background technique
硝化菌是一类具有硝化作用的自养化能细菌，包括亚硝酸盐菌和硝酸盐菌两个生理菌群，硝化菌世代周期长，对溶解氧、水温、有毒物质敏感。在脱氮过程中起着至关重要的作用，没有硝化就无法进行反硝化脱氮，但在常见的污水处理系统的活性污泥中含量较低，其因此硝化能力强弱直接关系到污水处理项目站点能否正常运行和能否出水达标。目前，大部分污水处理厂为了保障出水达标，面临着诸多挑战，例如工业废水自身具有成分复杂、含难降解污染物多、毒性大、进水水质波动较大等特点，硝化菌的硝化活性将受到抑制，导致污泥性状变差，出水氨氮浓度升高，为保障出水平稳达标，采取延长污泥龄和提高污泥浓度的措施。延长污泥龄虽势必会导致曝气池和二沉池的池容扩大，增加基建费用；投加新的活性污泥，时间长、工作量大，而且生化系统中污泥浓度提高后，造成排泥量加大，进而提高了污泥处置费用。Nitrifying bacteria are a class of autotrophic chemo-energy bacteria with nitrification, including two physiological flora, nitrite bacteria and nitrate bacteria. The nitrifying bacteria have a long generation cycle and are sensitive to dissolved oxygen, water temperature, and toxic substances. It plays a crucial role in the process of denitrification. Without nitrification, denitrification and denitrification cannot be carried out. However, the content of activated sludge in common sewage treatment systems is relatively low. Therefore, the nitrification capacity is directly related to sewage treatment. Whether the project site can operate normally and whether the water can reach the standard. At present, most sewage treatment plants are faced with many challenges in order to ensure that the effluent reaches the standard. For example, industrial wastewater itself has the characteristics of complex composition, many refractory pollutants, high toxicity, and large fluctuation of influent water quality. It is inhibited, resulting in the deterioration of sludge properties and the increase of ammonia nitrogen concentration in effluent. In order to ensure that the effluent reaches the standard smoothly, measures are taken to prolong the sludge age and increase the sludge concentration. Although prolonging the sludge age will inevitably lead to the expansion of the tank capacity of the aeration tank and the secondary sedimentation tank and increase the capital construction cost; adding new activated sludge will take a long time and the workload will be large, and the increase of the sludge concentration in the biochemical system will cause The amount of sludge discharged increases, which in turn increases the cost of sludge disposal.
当前，解决上述问题采用硝化菌活性污泥富集法，国内外对该方法的研究较多，部分研究也进行了中试，但是还是存在一些缺点：富集速率缓慢，富集周期较长、硝化菌的浓度较低、储存成本较高等。At present, the nitrifying bacteria activated sludge enrichment method is used to solve the above problems. There are many studies on this method at home and abroad, and some studies have also carried out pilot tests, but there are still some shortcomings: the enrichment rate is slow, the enrichment period is long, and the The concentration of nitrifying bacteria is lower and the storage cost is higher.
中国专利CN201210014634.3公开了一种快速富集氨氧化菌的方法和装置。主要采用序批式活性污泥法，以逐渐提高培养液中氨氮浓度及PH过程控制的方法进行富集。该培养方法通过可编程过程控制器进行控制进水、加碱、曝气、加碱、曝气、回流、沉淀、排水及闲置等步骤。但是该方法存在不足之处是培养周期过长。Chinese patent CN201210014634.3 discloses a method and device for rapidly enriching ammonia oxidizing bacteria. The sequencing batch activated sludge method is mainly used for enrichment by gradually increasing the concentration of ammonia nitrogen in the culture solution and controlling the pH process. The culturing method controls the steps of water inflow, alkali addition, aeration, alkali addition, aeration, reflux, sedimentation, drainage and idleness through a programmable process controller. However, the disadvantage of this method is that the culture period is too long.
中国专利CN201410731184.9公开了一种硝化菌富集培养装置及培养方法。该装置通过在反应器内设置陶瓷膜内筒作为硝化菌培养单元，逐渐提高培养液中氨氮浓度及PH过程控制的方法进行富集。当氨氮去除率达到90％以上时，停止曝气，过滤排水收集污泥，培养一批总周期134小时。该方法仍存在培养周期偏长、自动化程度偏低、无法连续运行投加硝化菌等问题。Chinese patent CN201410731184.9 discloses a nitrifying bacteria enrichment culture device and a culture method. The device is enriched by setting a ceramic membrane inner cylinder as a nitrifying bacteria culture unit in the reactor, and gradually increasing the ammonia nitrogen concentration in the culture solution and the method of pH process control. When the removal rate of ammonia nitrogen reaches more than 90%, the aeration is stopped, the sewage is filtered to collect the sludge, and the total cycle of cultivating a batch is 134 hours. This method still has problems such as long culture period, low degree of automation, and inability to continuously run and add nitrifying bacteria.
发明内容SUMMARY OF THE INVENTION
本发明所要解决的技术问题是，提供一种煤气化废水生物强化处理方法和装置，实现快速降低工业废水中铵态氮。The technical problem to be solved by the present invention is to provide a biological enhancement treatment method and device for coal gasification wastewater, which can rapidly reduce ammonium nitrogen in industrial wastewater.
本发明提供一种煤气化废水生物强化处理方法，包括以下步骤：S1：培养罐加入营养液一，接种来自生化池的活性污泥，以预设的第一转速进行搅拌，并控制溶氧为2-3mg/L、PH为7.5-8.0、温度为C1，连续培养第一预设时间(如,三周)，培养过程中每间隔一定时间加入定量的营养液一；S2：培养罐加入营养液二，以预设的第二转速搅拌，并控制溶氧为3-4mg/L、PH为8.0-8.5、温度为C2，连续培养第二预设时间，当达到培养终点后，将培养好的95％体积的菌液投加入生化系统；S3：以剩余的5％菌液作为接种来源，投加定量的营养液二，重 新按照S2控制条件培养第二预设时间，达到培养终点后，再次投加入生化系统，以此循环反复。The present invention provides a method for bio-enhancing treatment of coal gasification wastewater, comprising the following steps: S1: adding a nutrient solution to a culture tank, inoculating activated sludge from a biochemical tank, stirring at a preset first rotational speed, and controlling dissolved oxygen to be 2-3mg/L, PH is 7.5-8.0, temperature is C1, continuous culture for the first preset time (for example, three weeks), and quantitative nutrient solution 1 is added at regular intervals during the culture process; S2: The culture tank is added with nutrients Liquid 2, stir at the preset second rotation speed, and control the dissolved oxygen to be 3-4mg/L, the pH to be 8.0-8.5, and the temperature to be C2, and continuously cultivate for the second preset time. When the culture end point is reached, the culture will be well 95% of the volume of the bacterial solution was added to the biochemical system; S3: using the remaining 5% bacterial solution as the inoculation source, adding a quantitative nutrient solution II, and re-culturing the second preset time according to the control conditions of S2, after reaching the culture end point, Put it into the biochemical system again, and the cycle repeats.
优选的，所述温度C2大于温度C1。Preferably, the temperature C2 is greater than the temperature C1.
优选的，所述第一转速为每分钟90转，所述第二转速为每分钟110转。Preferably, the first rotational speed is 90 revolutions per minute, and the second rotational speed is 110 revolutions per minute.
优选的，所述培养终点为每毫升培养液中细菌总数达到预设值。Preferably, the culture end point is that the total number of bacteria per milliliter of culture solution reaches a preset value.
优选的，营养液一包括硫酸铵0.5～5g/L、硫酸镁0.1～1g/L、磷酸二氢钠0.1～3g/L、磷酸氢二钾0.1～6g/L、硫酸亚铁0.05～0.5g/L、硫酸锰0.03～0.1g/L；碳酸钙0.5～5g/L和水1000ml。Preferably, the nutrient solution one comprises ammonium sulfate 0.5-5 g/L, magnesium sulfate 0.1-1 g/L, sodium dihydrogen phosphate 0.1-3 g/L, dipotassium hydrogen phosphate 0.1-6 g/L, ferrous sulfate 0.05-0.5 g /L, manganese sulfate 0.03～0.1g/L; calcium carbonate 0.5～5g/L and water 1000ml.
优选的，营养液二的组成成分包括基础营养元素、复合有机氮营养和微量元素。Preferably, the composition of the second nutrient solution includes basic nutrient elements, complex organic nitrogen nutrition and trace elements.
优选的，所述基础营养元素包括硫酸铵0.1～2g/L、碳酸氢钠2.0～2.5g/L；磷酸二氢钾0.005～0.008g/L；氯化钙0.4～0.8g/L；硫酸镁0.3～0.4g/L；硫酸亚铁0.020～0.025g/L；乙二胺四乙酸0.028～0.032g/L、复合有机氮营养20～50ml/L和微量元素0.8～l.2mL/L。Preferably, the basic nutrients include ammonium sulfate 0.1-2 g/L, sodium bicarbonate 2.0-2.5 g/L; potassium dihydrogen phosphate 0.005-0.008 g/L; calcium chloride 0.4-0.8 g/L; magnesium sulfate 0.3～0.4g/L; ferrous sulfate 0.020～0.025g/L; EDTA 0.028～0.032g/L, compound organic nitrogen nutrition 20～50ml/L and trace elements 0.8～1.2mL/L.
优选的，所述复合有机氮营养包括玉米浆、豆粕水解液和酵母粉，配制比例为2:1:0.5～1。Preferably, the compound organic nitrogen nutrition comprises corn steep liquor, soybean meal hydrolyzate and yeast powder, and the preparation ratio is 2:1:0.5-1.
优选的，所述微量元素包括氯化锰850～950mg/L；乙二胺四乙酸1300～1400mg/L；硫酸锌350～450mg/L；硫酸铜200～250mg/L；氯化钴200～250mg/L；钼酸钠180～220mg/L；硒酸钠80～120mg/L；氯化镍150～200mg/L；硼酸10～15mg/L。Preferably, the trace elements include manganese chloride 850-950 mg/L; EDTA 1300-1400 mg/L; zinc sulfate 350-450 mg/L; copper sulfate 200-250 mg/L; cobalt chloride 200-250 mg /L; sodium molybdate 180-220 mg/L; sodium selenate 80-120 mg/L; nickel chloride 150-200 mg/L; boric acid 10-15 mg/L.
本发明还提供一种煤气化废水生物强化处理装置，采用上述任一 项的煤气化废水生物强化处理方法，所述装置包括富集培养罐，PH调节溶液槽和营养液槽，所述富集培养罐中设置有用于提供培养过程中需要的氧气的曝气系统，对温度进行控制的温控子系统，对PH进行控制的PH调节子系统和搅拌子系统，以及空用于控制培养液的输送速率的营养液加药子系统，接种与菌液输送子系统和自动控制系统，富集培养罐通过PH输送泵与PH调节溶液槽连通，营养液槽通过营养液输送泵与富集培养罐连通，通过菌液输送泵将达到培养目标的液体排出富集培养罐。The present invention also provides a bio-enhanced treatment device for coal gasification wastewater, which adopts any one of the above-mentioned bio-enhanced treatment methods for coal gasification wastewater. The device includes an enrichment culture tank, a pH adjustment solution tank and a nutrient solution tank. The culture tank is provided with an aeration system for providing oxygen required in the culture process, a temperature control subsystem for temperature control, a PH adjustment subsystem and a stirring subsystem for PH control, and an air conditioner for controlling the culture liquid. The nutrient solution dosing subsystem of the delivery rate, the inoculation and bacterial solution delivery subsystem and the automatic control system, the enrichment culture tank is connected with the pH adjustment solution tank through the PH delivery pump, and the nutrient solution tank is connected with the enrichment culture tank through the nutrient solution delivery pump The liquid that reaches the culture target is discharged from the enrichment culture tank through the bacterial liquid delivery pump.
本发明还提供一种煤气化废水生物强化处理装置其包括:The present invention also provides a bio-enhanced treatment device for coal gasification wastewater, which comprises:
富集培养罐，PH调节溶液槽和营养液槽，enrichment culture tank, pH adjustment solution tank and nutrient solution tank,
所述富集培养罐通过PH输送泵与PH调节溶液槽连通，所述营养液槽通过营养液输送泵与富集培养罐连通，The enrichment culture tank is communicated with the pH adjustment solution tank through the pH delivery pump, and the nutrient solution tank is communicated with the enrichment culture tank through the nutrient solution delivery pump,
所述富集培养罐中设置有：用于提供培养过程中需要的氧气的曝气系统，对所述富集培养罐内的温度进行控制的温控子系统，对本体内菌液搅拌的搅拌子系统，用于控制培养液的输送速率的营养液加药子系统，The enrichment culture tank is provided with: an aeration system for providing oxygen required in the cultivation process, a temperature control subsystem for controlling the temperature in the enrichment culture tank, and a stirrer for stirring the bacterial liquid in the body. system, a nutrient solution dosing subsystem for controlling the delivery rate of the culture solution,
通过菌液输送泵将达到培养目标的液体排出富集培养罐，The liquid that reaches the culture target is discharged from the enrichment culture tank through the bacterial liquid delivery pump.
所述煤气化废水生物强化处理装置运行时采用上述的煤气化废水生物强化处理方法。When the coal gasification wastewater biological enhancement treatment device is operated, the above-mentioned coal gasification wastewater biological enhancement treatment method is adopted.
相对于现有技术中的方案，本发明的优点：本发明可以有效提高处理氨氮负荷，从而减少污泥浓度，减少污泥排放量，降低污泥处置费用；降低了使用成本；且由于接种来自污水生化系统，所选择的微 生物已经完全适应原有水质，具有较强的适应性；该方法不仅仅用于去除氨氮生物强化工艺，还可以在此基础上进行二次开发特殊环境或者其他物质去除的生物强化工艺。Compared with the solutions in the prior art, the advantages of the present invention: the present invention can effectively improve the ammonia nitrogen load, thereby reducing sludge concentration, sludge discharge, and sludge disposal costs; In the sewage biochemical system, the selected microorganisms have been fully adapted to the original water quality and have strong adaptability; this method is not only used for the removal of ammonia nitrogen bio-enhancement process, but also can be used for secondary development in special environments or other substances removal on this basis. biofortification process.
附图说明Description of drawings
下面结合附图及实施例对本发明作进一步描述：Below in conjunction with accompanying drawing and embodiment, the present invention is further described:
图1所示为本发明煤气化废水生物强化处理装置的一实施例的结构示意图。FIG. 1 is a schematic structural diagram of an embodiment of a coal gasification wastewater bio-enhanced treatment device of the present invention.
图2所示为本发明煤气化废水生物强化处理方法的流程示意图。FIG. 2 is a schematic flow chart of the biological enhancement treatment method for coal gasification wastewater according to the present invention.
具体实施方式Detailed ways
以下结合具体实施例对上述方案做进一步说明。应理解，这些实施例是用于说明本发明而不限于限制本发明的范围。实施例中采用的实施条件可以如具体厂家的条件做进一步调整，未注明的实施条件通常为常规实验中的条件。The above scheme will be further described below in conjunction with specific embodiments. It should be understood that these examples are intended to illustrate the invention and not to limit the scope of the invention. The implementation conditions used in the examples can be further adjusted such as the conditions of specific manufacturers, and the implementation conditions that are not specified are usually the conditions in routine experiments.
本发明提供一种煤气化废水生物强化处理装置，请参考图1所示，所述装置包括富集培养罐5，PH调节溶液槽6和盛放营养液一的第一槽7和盛放营养液二的第二槽8，所述富集培养罐5中设置有用于提供培养过程中需要的氧气的曝气系统，对温度进行控制的温控子系统，对PH进行控制的PH调节子系统和搅拌子系统11，以及用于控制培养液的输送速率的营养液加药子系统，接种与菌液输送子系统和自动控制系统，富集培养罐5通过PH调节输送泵22与PH调节溶液槽6连通，营养液槽通 过营养液输送泵与富集培养罐5连通，通过菌液输送泵将达到培养目标的液体排出富集培养罐5。The present invention provides a bio-enhanced treatment device for coal gasification wastewater, please refer to FIG. 1 , the device includes an enrichment culture tank 5, a pH adjustment solution tank 6, and a first tank 7 for containing nutrient solution 1 and a nutrient solution tank 7. The second tank 8 of liquid two, the enrichment culture tank 5 is provided with an aeration system for providing oxygen required in the cultivation process, a temperature control subsystem for temperature control, and a pH adjustment subsystem for pH control and stirring subsystem 11, as well as the nutrient solution dosing subsystem for controlling the delivery rate of the culture solution, the inoculation and bacterial solution delivery subsystem and the automatic control system, the enrichment culture tank 5 is connected with the pH adjustment solution by the pH adjustment delivery pump 22 The tank 6 is communicated, and the nutrient solution tank is communicated with the enrichment culture tank 5 through the nutrient solution delivery pump, and the liquid that reaches the cultivation target is discharged from the enrichment culture tank 5 through the bacterial solution delivery pump.
本申请提出一种煤气化废水生物强化处理装置，其包括：富集培养罐，该富集培养罐具有本体，体上具有：驱动部件，第一端口，其通过管道连接盛放营养液一的第一槽，第二端口，其通过管道连接盛放营养液二的第二槽，PH调节溶液投加口，其通过管道连PH调节溶液槽，及温度传感器，其电性连接温控模块，用以将检测的本体内的温度信息反馈至温控模块，本体内配置有:曝气模块，所述曝气模块用于提供培养过程中需要的氧气，搅拌装置，其包括驱动轴及桨叶，驱动轴部分穿出本体并连接驱动部件，驱动轴上间隔的设有至少2组桨叶，基于驱动部件的驱动该驱动轴旋转带动其上的桨叶旋转。该煤气化废水生物强化处理装置还配置有控制模块，其用以控制煤气化废水生物强化处理装置的运行。较佳的，该第一端口与第二端口可合为一个营养液投加口。The present application proposes a bio-enhanced treatment device for coal gasification wastewater, which includes: an enrichment culture tank, the enrichment culture tank has a body, and the body is provided with: a driving component and a first port, which is connected to a nutrient solution through a pipeline. The first tank and the second port are connected to the second tank containing the nutrient solution two through the pipeline, the pH adjustment solution feeding port, which is connected to the pH adjustment solution tank through the pipeline, and the temperature sensor, which is electrically connected to the temperature control module, In order to feed back the temperature information in the detected body to the temperature control module, the body is equipped with: an aeration module, which is used to provide oxygen required in the culturing process, and a stirring device, which includes a drive shaft and a paddle The drive shaft partially penetrates the body and is connected to the drive component. At least two groups of paddles are spaced on the drive shaft. The drive shaft rotates and drives the paddles on it to rotate based on the drive of the drive component. The coal gasification wastewater biological enhancement treatment device is also equipped with a control module, which is used to control the operation of the coal gasification wastewater biological enhancement treatment device. Preferably, the first port and the second port can be combined into a nutrient solution feeding port.
接下来结合图1，来详细的描述煤气化废水生物强化处理装置。Next, with reference to FIG. 1 , the bio-enhanced treatment device for coal gasification wastewater will be described in detail.
该煤气化废水生物强化处理装置包括:富集培养罐5，富集培养罐5具有本体5a，本体5a上设有营养液投加口a，其通过管道分别连接盛放营养液一的第一槽7和盛放营养液二的第二槽8，PH调节溶液投加口b，其通过管道连接PH调节溶液槽，本体5a内设置有用于提供培养过程中需要的氧气的曝气模块(也称曝气系统，图未示)，温度计14，其电性连接温控模块(图未示)，以对富集培养罐5的温度进行控制，搅拌装置11，其包括驱动轴及桨叶5b，驱动轴部分穿出本体5a连接驱动部件M， 驱动轴上间隔的设有至少2组桨叶5b。该3组桨叶大致位于本体的上部、中部及下部。这样提高搅拌的精度。较佳的，该搅拌装置由电机或电机与变频器组合驱动可充分保障培养过程中各类物质、温度、氧气等达到理想的匀质状态。搅拌装置11还兼具对PH进行调节的作用。富集培养罐5通过PH调节输送泵22与PH调节溶液槽6连通，营养液槽通过营养液输送泵与富集培养罐5连通，通过菌液输送泵将达到培养目标的液体排出富集培养罐5。曝气系统包括公用空气源、空气流量计、培养罐曝气管、溶氧计12等，主要是提供培养过程中需要的氧气，使得氧气得以高效利用。温控模块包括水源、温控水箱4、培养罐温控夹套和温度计14等，以保证培养过程中温度控制在合适的温度范围内。PH调节系统包括酸/碱储罐、加药计量泵、PH计13等，以确保培养过程中PH控制在合适的温度范围内。营养液一输送泵(23)，其通过管道连接盛放营养液一的第一槽(7)连接，基于控制模块的控制将营养液一注入富集培养罐(5)。营养液二输送泵(24),其通过管道连接盛放营养液二的第二槽(8)连接，基于控制模块的控制将营养液二注入富集培养罐(5)。本体的底部配置有菌液输出口c，其通过管道及阀连接至好氧池前端。本体的顶部部配置有进泥口d，其通过管道连接好氧池末端。该搅拌装置配置有第一工作模式及第二工作模式，处于第一工作模块时转速为每分钟90，处于第二工作模块时转速为每分钟120。This coal gasification wastewater bio-enhanced treatment device comprises: an enrichment culture tank 5, and the enrichment culture tank 5 has a body 5a, and the body 5a is provided with a nutrient solution feeding port a, which is respectively connected to the first place containing the nutrient solution a through pipelines The tank 7 and the second tank 8 containing the nutrient solution two, the pH adjustment solution adding port b, is connected to the pH adjustment solution tank through the pipeline, and the body 5a is provided with an aeration module (also an aeration module for providing oxygen required in the culturing process). called aeration system, not shown), a thermometer 14, which is electrically connected to a temperature control module (not shown) to control the temperature of the enrichment culture tank 5, a stirring device 11, which includes a drive shaft and a paddle 5b , the drive shaft partially penetrates the body 5a to connect to the drive component M, and at least two groups of paddles 5b are arranged on the drive shaft at intervals. The three sets of paddles are generally located at the upper, middle and lower parts of the body. This improves the accuracy of stirring. Preferably, the stirring device is driven by a motor or a combination of a motor and a frequency converter, which can fully ensure that various substances, temperature, oxygen, etc. reach an ideal homogeneous state during the cultivation process. The stirring device 11 also has the function of adjusting the pH. The enrichment culture tank 5 is communicated with the pH adjustment solution tank 6 through the pH adjustment delivery pump 22, and the nutrient solution tank is communicated with the enrichment culture tank 5 through the nutrient solution delivery pump, and the liquid that reaches the culture target is discharged through the bacterial liquid delivery pump for enrichment culture. Tank 5. The aeration system includes a public air source, an air flow meter, a culture tank aeration pipe, a dissolved oxygen meter 12, etc., mainly to provide the oxygen needed in the culture process, so that the oxygen can be used efficiently. The temperature control module includes a water source, a temperature control water tank 4, a temperature control jacket of a culture tank, a thermometer 14, etc., to ensure that the temperature is controlled within a suitable temperature range during the culture process. The pH adjustment system includes acid/alkali storage tank, dosing metering pump, pH meter 13, etc., to ensure that the pH is controlled within a suitable temperature range during the cultivation process. A nutrient solution-transporting pump (23) is connected to a first tank (7) containing the nutrient solution-1 through a pipeline, and the nutrient solution-1 is injected into the enrichment culture tank (5) based on the control of the control module. The second nutrient solution delivery pump (24) is connected to the second tank (8) containing the second nutrient solution through a pipeline, and the second nutrient solution is injected into the enrichment culture tank (5) based on the control of the control module. The bottom of the body is equipped with a bacterial liquid output port c, which is connected to the front end of the aerobic tank through pipes and valves. The top part of the body is provided with a mud inlet d, which is connected to the end of the aerobic tank through a pipeline. The stirring device is configured with a first working mode and a second working mode, and the rotating speed is 90 per minute when in the first working module, and 120 per minute when it is in the second working module.
上述的煤气化废水生物强化处理装置还包括，营养液加药子系统，其包括储罐、加药计量泵等，通过调节营养液的输送速率以满足培养过程中细菌生长所需要的各类营养物质需求。接种与菌液输送子系统， 其包括两部分，一是污泥接种系统，从生化池体中通过输送泵投加活性污泥至培养罐中；二是硝化菌液输送系统，将经过培养达到培养目标的硝化菌输送投加至生化池体中。自控系统用于与上述计量仪表，酸/碱计量泵，温控罐阀门，输送泵，电机等连接，控制溶氧计，空气流量计、搅拌器，PH计，温度计，液位计的转速，可以在控制面板上显示运行值及操控。The above-mentioned coal gasification wastewater bio-enhanced treatment device also includes a nutrient solution dosing subsystem, which includes a storage tank, a dosing metering pump, etc., by adjusting the delivery rate of the nutrient solution to meet the various nutrients required for bacterial growth during the cultivation process. Material needs. Inoculation and bacteria liquid delivery subsystem, which includes two parts, one is the sludge inoculation system, which adds activated sludge from the biochemical tank body to the culture tank through the delivery pump; the other is the nitrifying bacteria liquid delivery system, which will reach the The nitrifying bacteria of the culture target are transported and fed into the biochemical tank. The automatic control system is used to connect with the above-mentioned metering instruments, acid/alkali metering pumps, temperature control tank valves, transfer pumps, motors, etc. Operating values and manipulations can be displayed on the control panel.
本发明还提供一种煤气化废水生物强化处理方法，请参考图2所示，所述方法包括以下步骤：The present invention also provides a biological enhancement treatment method for coal gasification wastewater, please refer to FIG. 2 , the method includes the following steps:
第一阶段，培养罐加入营养液一，接种来自生化池的活性污泥，以预设的第一转速进行搅拌，并控制溶氧2-3mg/L、PH 7.5-8.0、温度为30℃，连续培养第一预设时间(如,三周)，培养过程中每间隔一定时间(如：5-7天)加入定量的营养液一。本实施方式中，第一预设时间为三周，在其他的实施方式中，可视场合微调整。In the first stage, the nutrient solution 1 is added to the culture tank, the activated sludge from the biochemical tank is inoculated, stirred at the preset first rotation speed, and the dissolved oxygen is controlled to 2-3mg/L, PH 7.5-8.0, and the temperature is 30°C. Continuously cultivate for a first preset time (eg, three weeks), and add a quantitative nutrient solution at regular intervals (eg, 5-7 days) during the culturing process. In this embodiment, the first preset time is three weeks, and in other embodiments, it can be finely adjusted according to occasions.
第二阶段，培养罐加入营养液二，以预设的第二转速搅拌，并控制溶氧3-4mg/L、PH 8.0-8.5、温度为35℃，连续培养第二预设时间(如，2-3天)，当达到培养终点后，将培养好的按照预设的比例(95％体积)的菌液投加入生化系统。在其他的实施方式中，第二预设时间可视场合微调整。这样最大化的利用培养好的菌液。In the second stage, the nutrient solution II is added to the culture tank, stirred at a preset second rotational speed, and controlled to dissolve oxygen 3-4 mg/L, pH 8.0-8.5, and temperature to 35°C, and continuously cultivate for a second preset time (eg, 2-3 days), when the culture end point is reached, the cultured bacterial liquid is added to the biochemical system according to the preset ratio (95% volume). In other embodiments, the second preset time may be finely adjusted according to occasions. This maximizes the use of cultured bacteria.
第三阶段，以剩余的5％菌液作为接种来源，投加定量的营养液二，重新按照第二阶段控制条件培养2-3天，达到培养终点后，再次投加入生化系统，以此循环反复。In the third stage, use the remaining 5% bacterial solution as the source of inoculation, add a quantitative nutrient solution 2, and re-cultivate according to the control conditions of the second stage for 2-3 days. repeatedly.
上述步骤中，第一转速为每分钟90转，所述第二转速为每分钟110转。所述培养终点为每毫升培养液中细菌总数达到预设值时，在其中一实施例中，培养终点为检测每毫升培养液中细菌总数1×10 8～1×10 9。 In the above steps, the first rotational speed is 90 revolutions per minute, and the second rotational speed is 110 revolutions per minute. The culture end point is when the total number of bacteria per milliliter of culture solution reaches a preset value. In one embodiment, the culture end point is to detect the total number of bacteria in each milliliter of culture solution of 1×10 8 to 1×10 9 .
上述实施例中，营养液一包括：硫酸铵0.5～5g/L、硫酸镁0.1～1g/L、磷酸二氢钠0.1～3g/L、磷酸氢二钾0.1～6g/L、硫酸亚铁0.05～0.5g/L、硫酸锰0.03～0.1g/L；碳酸钙0.5～5g/L和水1000ml。营养液二的组成成分包括：基础营养元素、复合有机氮营养和微量元素。所述基础营养元素包括硫酸铵0.1～2g/L、碳酸氢钠2.0～2.5g/L；磷酸二氢钾0.005～0.008g/L；氯化钙0.4～0.8g/L；硫酸镁0.3～0.4g/L；硫酸亚铁0.020～0.025g/L；乙二胺四乙酸0.028～0.032g/L、复合有机氮营养20～50ml/L和微量元素0.8～l.2mL/L。所述复合有机氮营养包括玉米浆、豆粕水解液和酵母粉，配制比例为2:1:0.5～1。所述微量元素包括氯化锰850～950mg/L；乙二胺四乙酸1300～1400mg/L；硫酸锌350～450mg/L；硫酸铜200～250mg/L；氯化钴200～250mg/L；钼酸钠180～220mg/L；硒酸钠80～120mg/L；氯化镍150～200mg/L；硼酸10～15mg/L。In the above embodiment, the first nutrient solution includes: ammonium sulfate 0.5-5 g/L, magnesium sulfate 0.1-1 g/L, sodium dihydrogen phosphate 0.1-3 g/L, dipotassium hydrogen phosphate 0.1-6 g/L, ferrous sulfate 0.05 ～0.5g/L, manganese sulfate 0.03～0.1g/L; calcium carbonate 0.5～5g/L and water 1000ml. The composition of nutrient solution II includes: basic nutrients, complex organic nitrogen nutrition and trace elements. The basic nutrients include ammonium sulfate 0.1-2 g/L, sodium bicarbonate 2.0-2.5 g/L; potassium dihydrogen phosphate 0.005-0.008 g/L; calcium chloride 0.4-0.8 g/L; magnesium sulfate 0.3-0.4 g/L; ferrous sulfate 0.020～0.025g/L; ethylenediaminetetraacetic acid 0.028～0.032g/L, compound organic nitrogen nutrition 20～50ml/L and trace elements 0.8～1.2mL/L. The compound organic nitrogen nutrition includes corn steep liquor, soybean meal hydrolyzate and yeast powder, and the preparation ratio is 2:1:0.5-1. The trace elements include manganese chloride 850-950 mg/L; EDTA 1300-1400 mg/L; zinc sulfate 350-450 mg/L; copper sulfate 200-250 mg/L; cobalt chloride 200-250 mg/L; Sodium molybdate 180-220mg/L; sodium selenate 80-120mg/L; nickel chloride 150-200mg/L; boric acid 10-15mg/L.
以2m 3单位的废水为例，请参考图1所示，本发明应用上述煤气化废水生物强化处理装置实现煤气化废水生物强化处理方法包括以下具体步骤： Taking 2m 3 unit of wastewater as an example, please refer to Figure 1, the present invention applies the above-mentioned coal gasification wastewater biological enhancement treatment device to realize the coal gasification wastewater biological enhancement treatment method includes the following specific steps:
(1)从生化系统好氧池末端3进泥0.1m 3； (1) 0.1m 3 of mud is fed from the end 3 of the aerobic tank of the biochemical system;
(2)从盛放营养液一的槽7通过营养液一输送泵23注入富集培养罐50.4m 3的营养液一，使得最终氨氮浓度达到600mg/L； (2) from the tank 7 that holds the nutrient solution one, the nutrient solution one is injected into the enrichment culture tank 50.4m by the nutrient solution one delivery pump 23, so that the final ammonia nitrogen concentration reaches 600mg/L;
(3)开启低压空气源开关1，启动空气曝气器15；(3) Turn on the low-pressure air source switch 1, and start the air aerator 15;
(4)开启搅拌子系统11，设置初始转速每分钟90转；(4) Open the stirring subsystem 11, and set the initial rotation speed to 90 rpm;
(5)开启自来水开关2，启动控温水箱4，设置自来水电磁阀一16、自来水电磁阀二17、变温水电磁阀18、变温水输送泵19自动控制状态；(5) Turn on the tap water switch 2, start the temperature control water tank 4, and set the tap water solenoid valve one 16, the tap water solenoid valve two 17, the variable temperature water solenoid valve 18, and the variable temperature water delivery pump 19 to automatically control the state;
(6)第一阶段培养过程中，通过在线连溶氧计12、PH计13、温度计14连续监测控制溶氧为2-3mg/L、PH为7.5-8.0、温度为30℃；溶氧计12的信号反馈至自动控制系统，并通过PLC控制空气流量，控制空气流量控制电磁阀25调节空气流量，维持2-3mg/L溶氧值；PH计13的信号反馈至自动控制系统，并通过PLC控制PH调节输送泵22将PH调节液槽6的5％碳酸氢钠溶液加入富集培养罐5，以达到维持PH 7.5-8.0；温度计14的信号反馈至自动控制系统并通过PLC控制控温水箱4、自来水电磁阀一16、自来水电磁阀二17、变温水电磁阀18，不断切换冷/热水状态，从而达到控制培养罐5的培养温度；(6) During the first-stage cultivation process, the dissolved oxygen is continuously monitored and controlled to be 2-3 mg/L, the pH to be 7.5-8.0, and the temperature to be 30° C. by connecting the dissolved oxygen meter 12, PH meter 13, and thermometer 14 online; The signal of 12 is fed back to the automatic control system, and the air flow is controlled by PLC, and the air flow is controlled by the solenoid valve 25 to adjust the air flow to maintain the dissolved oxygen value of 2-3mg/L; the signal of the PH meter 13 is fed back to the automatic control system, and passed The PLC controls the pH adjustment delivery pump 22 to add the 5% sodium bicarbonate solution of the pH adjustment liquid tank 6 to the enrichment culture tank 5 to maintain pH 7.5-8.0; the signal of the thermometer 14 is fed back to the automatic control system and the temperature control is controlled by the PLC Water tank 4, tap water solenoid valve one 16, tap water solenoid valve two 17, variable temperature water solenoid valve 18, constantly switch the cold/hot water state, so as to achieve the cultivation temperature of the control culture tank 5;
(7)第一阶段培养过程中，每间隔一周通过营养液一输送泵23泵入营养液一0.1-0.15m 3； (7) in the first stage culturing process, nutrient solution-0.1-0.15m 3 is pumped into nutrient solution through nutrient solution-transport pump 23 every other week;
(8)第一阶段连续培养三周；(8) The first stage was continuously cultivated for three weeks;
(9)从盛放营养液二的槽8通过营养液二输送泵24注入富集培养罐5达到液位计10所标定的1.6m 3； (9) inject the enrichment culture tank 5 from the tank 8 containing the nutrient solution 2 through the nutrient solution 2 delivery pump 24 to reach the 1.6m 3 demarcated by the liquid level meter 10;
(10)第二阶段培养过程中，通过在线连溶氧计12、PH计13、温度计14连续监测控制溶氧3-4mg/L、PH为8.0-8.5、温度为35℃，转速每分钟110转；(10) During the second stage of cultivation, continuous monitoring and control of dissolved oxygen 3-4 mg/L, PH of 8.0-8.5, temperature of 35° C., and rotational speed of 110 per minute are carried out through the online connected dissolved oxygen meter 12, PH meter 13, and thermometer 14. change;
(11)第二阶段培养过程中，溶氧、PH、温度控制方法参照第一阶段 控制方法；(11) in the second stage cultivation process, dissolved oxygen, pH, temperature control method refer to the first stage control method;
(12)第二阶段连续培养2-3天；(12) The second stage is continuously cultivated for 2-3 days;
(13)培养终点为检测每毫升培养液中细菌总数1×10 8～1×10 9； (13) The end point of the culture is to detect the total number of bacteria in each milliliter of culture medium from 1×10 8 to 1×10 9 ;
(14)打开罐底阀20，开启菌液输送泵21，排出1.5m 3菌液至生化系统好氧池前端9； (14) open the tank bottom valve 20, open the bacterial liquid delivery pump 21, and discharge 1.5 m of the bacterial liquid to the front end 9 of the aerobic tank of the biochemical system;
(15)重复(9)-(14)步骤，循环进行。(15) Steps (9)-(14) are repeated, and the cycle is performed.
本发明废水生化处理系统采用A/O工艺。进水COD通常在550～800mg/L之间，氨氮值在200～250mg/L之间，在其他实施例中甚至远超过上述范围；出水要求COD低于500mg/L，氨氮低于50mg/L。The wastewater biochemical treatment system of the present invention adopts the A/O process. The influent COD is usually between 550 and 800 mg/L, and the ammonia nitrogen value is between 200 and 250 mg/L. In other embodiments, it even far exceeds the above range; the effluent requires COD to be lower than 500 mg/L and ammonia nitrogen to be lower than 50 mg/L. .
本发明投加污泥后将事先提前培养好硝化菌投入，经过大约2周驯化培养后，处理水量及排水指标可达到工艺要求。After the sludge is added in the present invention, the nitrifying bacteria are cultivated in advance, and after about 2 weeks of domestication and cultivation, the treated water volume and the drainage index can meet the technological requirements.
气化灰水温度较高(超过45℃)，需要经过换热器将水温降至37℃以下。但是在夏季气温较高时，因换热器故障或者换热性能下降，偶尔发生进水温度37-42℃事故，造成生化系统因受热处理能力急剧下降事故。现有技术在水温恢复正常后，一般需要重新投加污泥培养1-2周才能恢复正常，本发明通常2-4天即可恢复正常状态。且可解决进水氨氮值过高(≧250mg/L)，短时间内极易造成出水指标不达标的问题。The gasification grey water temperature is high (over 45°C), and it needs to go through a heat exchanger to reduce the water temperature to below 37°C. However, when the temperature is high in summer, due to the failure of the heat exchanger or the decrease of the heat exchange performance, the accident of the inlet water temperature of 37-42 ℃ occasionally occurs, resulting in a sharp decline in the heat treatment capacity of the biochemical system. In the prior art, after the water temperature returns to normal, it generally takes 1-2 weeks of re-addition of sludge for culture to return to normal, and the present invention usually returns to normal in 2-4 days. And it can solve the problem that the ammonia nitrogen value of the influent water is too high (≧250mg/L), and it is easy to cause the problem that the effluent index does not meet the standard in a short time.
本发明的有益效果如下：本发明在生化系统受到进水温度高、氨氮值较高等强烈冲击时，2-3天恢复正常，避免运行过程中剧烈波动，影响出水指标不达标；本发明可以有效提高处理氨氮负荷，从而减少污泥浓度，减少污泥排放量，降低污泥处置费用；降低了使用成本；且由于接种来自污水生化系统，所选择的微生物已经完全适应原有水 质，具有较强的适应性；该方法不仅仅用于去除氨氮生物强化工艺，还可以在此基础上进行二次开发特殊环境或者其他物质去除的生物强化工艺。The beneficial effects of the present invention are as follows: when the biochemical system is strongly impacted by high inlet water temperature, high ammonia nitrogen value, etc., the present invention returns to normal in 2-3 days, avoiding violent fluctuations during operation, and affecting the substandard effluent index; the present invention can effectively Increase the ammonia nitrogen load of the treatment, thereby reducing the sludge concentration, reducing the sludge discharge, and reducing the cost of sludge disposal; reducing the cost of use; and because the inoculation comes from the sewage biochemical system, the selected microorganisms have been fully adapted to the original water quality, with strong adaptability; this method is not only used to remove ammonia nitrogen bio-enhancement process, but also can be used for secondary development of bio-enhancement process for special environment or other substances removal on this basis.
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人是能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡如本发明精神实质所做的等效变换或修饰，都应涵盖在本发明的保护范围之内。The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the art to understand the content of the present invention and implement them accordingly, and cannot limit the protection scope of the present invention by this. All equivalent transformations or modifications made in accordance with the spirit of the present invention shall be included within the protection scope of the present invention.

Claims (10)

  1. 一种煤气化废水生物强化处理方法，其特征在于，包括以下步骤：A method for biologically enhanced treatment of coal gasification wastewater, comprising the following steps:
    S1：培养罐加入营养液一，接种来自生化池的活性污泥，以预设的第一转速进行搅拌，并控制溶氧介于2-3mg/L、PH介于7.5-8.0、温度为C1，连续培养第一预设时间，培养过程中每间隔一定时间加入定量的营养液一；S1: Add nutrient solution 1 to the culture tank, inoculate the activated sludge from the biochemical tank, stir at the preset first rotation speed, and control the dissolved oxygen to be between 2-3mg/L, pH between 7.5-8.0, and temperature to be C1 , continuously cultivate the first preset time, and add a quantitative nutrient solution at a certain interval during the cultivation process;
    S2：培养罐加入营养液二，以预设的第二转速搅拌，并控制溶氧介于3-4mg/L、PH介于8.0-8.5、温度为C2，连续培养第二预设时间，当达到培养终点后，将培养好菌液的95％体积投加入生化系统；S2: Add nutrient solution 2 to the culture tank, stir at the preset second rotation speed, and control the dissolved oxygen to be between 3-4mg/L, pH between 8.0-8.5, and temperature to be C2, and continuously cultivate for the second preset time. When After reaching the end point of the culture, 95% of the volume of the cultured bacterial solution was put into the biochemical system;
    S3：将投加剩余5％体积的菌液作为接种来源，投加定量的营养液二，重新按照S2控制条件培养第二预设时间，达到培养终点后，再次投加入生化系统，以此循环反复。S3: Add the remaining 5% volume of bacterial liquid as the source of inoculation, add a quantitative amount of nutrient solution 2, and re-cultivate for a second preset time according to the control conditions of S2. After reaching the end of the cultivation, add the biochemical system again, and repeat this cycle. repeatedly.
  2. 根据权利要求1所述的煤气化废水生物强化处理方法，其特征在于，所述温度C2大于温度C1。The method for biologically enhanced treatment of coal gasification wastewater according to claim 1, wherein the temperature C2 is greater than the temperature C1.
  3. 根据权利要求1所述的煤气化废水生物强化处理方法，其特征在于，The method for biologically enhanced treatment of coal gasification wastewater according to claim 1, characterized in that,
    所述第一转速为每分钟90转，所述第二转速为每分钟110转。The first rotational speed is 90 revolutions per minute, and the second rotational speed is 110 revolutions per minute.
  4. 根据权利要求1所述的煤气化废水生物强化处理方法，其特征在于，所述培养终点为每毫升培养液中细菌总数达到预设值。The method for bio-enhanced treatment of coal gasification wastewater according to claim 1, wherein the culture end point is that the total number of bacteria in each milliliter of culture solution reaches a preset value.
  5. 根据权利要求1所述的煤气化废水生物强化处理方法，其特征在于，营养液一包括：The biologically enhanced treatment method for coal gasification wastewater according to claim 1, wherein the nutrient solution one comprises:
    硫酸铵0.5～5g/L、硫酸镁0.1～1g/L、磷酸二氢钠0.1～3g/L、 磷酸氢二钾0.1～6g/L、硫酸亚铁0.05～0.5g/L、硫酸锰0.03～0.1g/L；碳酸钙0.5～5g/L和水1000ml。Ammonium sulfate 0.5～5g/L, magnesium sulfate 0.1～1g/L, sodium dihydrogen phosphate 0.1～3g/L, dipotassium hydrogen phosphate 0.1～6g/L, ferrous sulfate 0.05～0.5g/L, manganese sulfate 0.03～ 0.1g/L; calcium carbonate 0.5～5g/L and water 1000ml.
  6. 根据权利要求1所述的煤气化废水生物强化处理方法，其特征在于，营养液二的组成成分包括：基础营养元素、复合有机氮营养和微量元素。The bio-enhanced treatment method for coal gasification wastewater according to claim 1, wherein the composition of the second nutrient solution comprises: basic nutrient elements, complex organic nitrogen nutrients and trace elements.
  7. 根据权利要求6所述的煤气化废水生物强化处理方法，其特征在于，所述基础营养元素包括：硫酸铵0.1～2g/L、碳酸氢钠2.0～2.5g/L；磷酸二氢钾0.005～0.008g/L；氯化钙0.4～0.8g/L；硫酸镁0.3～0.4g/L；硫酸亚铁0.020～0.025g/L；乙二胺四乙酸0.028～0.032g/L、复合有机氮营养20～50ml/L和微量元素0.8～l.2mL/L。The method for biologically enhanced treatment of coal gasification wastewater according to claim 6, wherein the basic nutrient elements include: 0.1-2 g/L of ammonium sulfate, 2.0-2.5 g/L of sodium bicarbonate; 0.005-2.5 g/L of potassium dihydrogen phosphate 0.008g/L; calcium chloride 0.4～0.8g/L; magnesium sulfate 0.3～0.4g/L; ferrous sulfate 0.020～0.025g/L; EDTA 0.028～0.032g/L, compound organic nitrogen nutrition 20～50ml/L and trace elements 0.8～1.2mL/L.
  8. 根据权利要求6所述的煤气化废水生物强化处理方法，其特征在于，所述复合有机氮营养包括玉米浆、豆粕水解液和酵母粉，配制比例为2:1:0.5～1。The method for bio-enhanced treatment of coal gasification wastewater according to claim 6, wherein the composite organic nitrogen nutrition comprises corn steep liquor, soybean meal hydrolyzate and yeast powder, and the preparation ratio is 2:1:0.5-1.
  9. 根据权利要求6所述的煤气化废水生物强化处理方法，其特征在于，所述微量元素包括：The bio-enhanced treatment method for coal gasification wastewater according to claim 6, wherein the trace elements comprise:
    氯化锰850～950mg/L；乙二胺四乙酸1300～1400mg/L；硫酸锌350～450mg/L；硫酸铜200～250mg/L；氯化钴200～250mg/L；钼酸钠180～220mg/L；硒酸钠80～120mg/L；氯化镍150～200mg/L；硼酸10～15mg/L。Manganese chloride 850～950mg/L; EDTA 1300～1400mg/L; Zinc sulfate 350～450mg/L; Copper sulfate 200～250mg/L; Cobalt chloride 200～250mg/L; Sodium molybdate 180～ 220mg/L; sodium selenate 80-120mg/L; nickel chloride 150-200mg/L; boric acid 10-15mg/L.
  10. 一种煤气化废水生物强化处理装置，其特征在于，包括:A bio-enhanced treatment device for coal gasification wastewater, characterized in that, comprising:
    富集培养罐，PH调节溶液槽和营养液槽，enrichment culture tank, pH adjustment solution tank and nutrient solution tank,
    所述富集培养罐通过PH输送泵与PH调节溶液槽连通，所述营养液 槽通过营养液输送泵与富集培养罐连通，Described enrichment culture tank is communicated with pH adjustment solution tank by PH delivery pump, and described nutrient solution tank is communicated with enrichment culture tank by nutrient solution delivery pump,
    所述富集培养罐中设置有：用于提供培养过程中需要的氧气的曝气系统，对所述富集培养罐内的温度进行控制的温控子系统，对本体内菌液搅拌的搅拌子系统，用于控制培养液的输送速率的营养液加药子系统，The enrichment culture tank is provided with: an aeration system for providing oxygen required in the cultivation process, a temperature control subsystem for controlling the temperature in the enrichment culture tank, and a stirrer for stirring the bacterial liquid in the body. system, a nutrient solution dosing subsystem for controlling the delivery rate of the culture solution,
    通过菌液输送泵将达到培养目标的液体排出富集培养罐，The liquid that reaches the culture target is discharged from the enrichment culture tank through the bacterial liquid delivery pump.
    所述煤气化废水生物强化处理装置运行时采用上述权利要求1-9中任一项所述的煤气化废水生物强化处理方法。The bio-enhanced treatment method for coal gasification wastewater described in any one of the above claims 1-9 is adopted during operation of the coal gasification wastewater bio-enhanced treatment device.
PCT/CN2021/084900 2020-12-03 2021-04-01 Method and apparatus for bio-enhanced treatment of coal gasification wastewater WO2022116453A1 (en)

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