CN213707869U - Novel anaerobic reactor for treating organic wastewater containing high-concentration sulfate - Google Patents
Novel anaerobic reactor for treating organic wastewater containing high-concentration sulfate Download PDFInfo
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- 239000002912 waste gas Substances 0.000 claims 1
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- 238000012856 packing Methods 0.000 abstract description 26
- 238000011282 treatment Methods 0.000 abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 17
- 238000000855 fermentation Methods 0.000 abstract description 17
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- SQDAZGGFXASXDW-UHFFFAOYSA-N 5-bromo-2-(trifluoromethoxy)pyridine Chemical compound FC(F)(F)OC1=CC=C(Br)C=N1 SQDAZGGFXASXDW-UHFFFAOYSA-N 0.000 description 4
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Abstract
A novel anaerobic reactor for treating organic wastewater containing high-concentration sulfate belongs to the technical field of biological sewage treatment. The reactor comprises a reaction chamber, a water distributor, a three-phase separator and three layers of push-pull type packing plates. Organic matters in the wastewater are degraded and even mineralized by sludge flora in the reactor, sulfate is converted into hydrogen sulfide by sulfate reducing flora, and the hydrogen sulfide is absorbed and converted by the iron powder/graphene oxide mixed filler on the filler plate, so that the adverse effect of the hydrogen sulfide on flora in the reactor is avoided, the pull-type filler plate enables the filler to be fully contacted with microorganisms, the activity of the flora is greatly promoted, and the treatment effect of the reactor is obviously improved. The device can be used for constructing a co-metabolism system of the hydrolytic fermentation flora, the hydrogen-producing acetogenic flora and the sulfate reducing bacteria, is suitable for treating high-concentration sulfate wastewater at normal temperature, saves energy, has high pollutant removal efficiency, and overcomes the defects of difficult replacement of ineffective fillers and the like.
Description
Technical Field
The utility model relates to a novel anaerobic reactor for treating organic wastewater containing high-concentration sulfate, which belongs to the technical field of biological sewage treatment.
Background
At present, sulfate radical-containing organic wastewater generally exists, the content of sulfate radical in the wastewater reaches 1-5%, and the concentration of organic matters contained in the wastewater is high, but the wastewater is generally biodegradable or domesticated to achieve a good degradation effect. The idea of treating the wastewater is to firstly reduce the sulfate radical concentration by adopting a chemical precipitation method and then adopt an anaerobic biological treatment technology. However, the sulfate concentration is reduced to the requirement of anaerobic biological treatment, and barium salt is required for precipitation, so that the method is expensive and difficult to apply to practical application. If cheaper calcium salt is used for precipitation, sulfate radicals with higher concentration still exist in the wastewater, most of the precipitated effluent is treated by an anaerobic methane fermentation system, and a large amount of hydrogen sulfide is generated in the treatment process, so that methanogens and acid-producing bacteria in the system are finally inhibited and even die. The research and development of novel processes and equipment for treating the wastewater are urgent.
The traditional methane fermentation system utilizes the co-metabolism among the hydrolytic fermentation flora, the hydrogen-producing acetogenic flora and the methanogenic flora to treat the high-concentration organic wastewater, wherein the methanogenic flora is most sensitive to external environmental changes and toxic substances and has the most strict requirement on environmental conditions. In the process of treating the wastewater, the temperature is usually controlled between 35 ℃ and 40 ℃, a heating system is needed, the equipment cost is increased, the energy consumption is increased, and the operation cost is increased. When sulfate exists, hydrogen sulfide is generated under the action of sulfate reducing bacteria, methanogens are firstly inhibited, the co-metabolic environment of the whole biogas fermentation system is damaged, and finally the system is collapsed. In a biogas fermentation system, the existing sulfate reducing flora and methanogenic flora have an overlapped range of ecological niches, but the adaptive conditions and the types of available organic nutrients are much wider, and the tolerance to toxic substances is much higher than that of methanogenic flora. The traditional fermentation system is changed, the co-metabolism system of the hydrolytic fermentation flora, the hydrogen-producing acetogenic flora and the sulfate reducing bacteria is constructed, the sulfate-containing organic wastewater can be normally treated at the normal temperature of about 20 ℃, a heating system is not needed, the energy consumption is saved, and the operation cost is reduced. And when the wastewater contains high-concentration sulfate radicals, a large amount of generated hydrogen sulfide is discharged out of the system in time, and the toxicity of the hydrogen sulfide can also cause the inhibition and even death of each flora in the system. How to further reduce the high concentration of hydrogen sulfide in the reactor to reduce the harm to the anaerobic flora is a key problem that needs to be solved in the anaerobic fermentation system.
Studies on iron-based materials and carbon-based materials have enabled an increase in the efficiency of the reactor. In an anaerobic system, the existence of the iron powder can not only reduce the oxidation-reduction potential and improve the proper ecological niche for flora in the system, but also react with hydrogen sulfide generated in the system to reduce the concentration of the hydrogen sulfide. However, iron powder is added into the anaerobic reactor, exists in sludge, has low reaction efficiency with hydrogen sulfide, and can settle at the bottom of the sludge to be incapable of playing a role. After the reaction of iron powder and hydrogen sulfide is failed, the problem of residue treatment exists, and the replacement is difficult. How to regenerate the nanometer iron powder and reduce the dosage of the nanometer iron powder is also a key problem considered in practical application. The graphene has strong electron transfer capacity, can promote the reproduction and metabolism of microorganisms, and can reduce oxidized iron so as to promote the regeneration of ineffective iron powder.
The utility model discloses add plug-type packing layer at the reactor, the mixed column porous packing that utilizes iron powder and graphite alkene preparation is placed in the push-and-pull layer drawer in novel anaerobic reactor, adsorbs layer upon layer and reacts with the hydrogen sulfide that the system produced, and remaining hydrogen sulfide is collected after passing through top three-phase separator. The packing layer is reasonably arranged in the reactor, so that the concentration of hydrogen sulfide is effectively reduced, and the activity of flora in the system is promoted. After the packing layer is invalid, the graphite iron powder packing layer can be conveniently replaced by using a push-pull structure, the maintenance and the replacement are convenient, and the production is not influenced. The utility model discloses a handle high concentration sulfate organic waste water, can practice thrift the energy consumption greatly at 20 ℃ down steady operation, improve the treatment effeciency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems that the traditional anaerobic reactor can not effectively treat the waste water containing a large amount of sulfate and organic matters in food, medicine, chemical industry and the like, and providing the novel anaerobic reactor with the drawer type packing layer for treating the high-concentration sulfate organic waste water, the device can effectively reduce the concentration of hydrogen sulfide and improve the waste water treatment efficiency. Sewage enters the novel anaerobic reactor from bottom to top through the water distributor through the water inlet pipeline, is fully mixed with sludge, and degrades or mineralizes organic matters under the action of high-concentration sludge, so that sulfate is converted into hydrogen sulfide by sulfate reducing bacteria. The mixed columnar porous filler made of the iron powder and the graphene in the filler plate is fully mixed with the generated hydrogen sulfide, so that the concentration of the hydrogen sulfide in the solution is reduced, the toxic effect of the hydrogen sulfide on various floras is avoided, and the activity of the floras is promoted. And finally, discharging gas in the system through a three-phase separator for collection, and discharging purified effluent from the upper part of the reactor. This device has set up plug-type filler plate, reduce the concentration of hydrogen sulfide, improve fungus crowd metabolic activity, guarantee entire system normal operating, the problem of hydrogen sulfide to whole fermentation system poison effect among the traditional anaerobic reaction device has been solved, and can construct the novel metabolic system altogether of hydrolysis fermentation fungus crowd, hydrogen production acetogenic fungus crowd and sulfate reducing bacteria, replace traditional fermentation system, can normally handle waste water under the condition about 20 ℃, need not heating system, energy saving, and the operation cost is reduced, and the treatment effeciency is high. The drawer type packing layer makes the operation of changing the packing simple and easy.
The purpose of the utility model is solved through the following scheme: a novel anaerobic reaction comprising: a reaction chamber (1), a water distributor (2), a three-phase separator (3) and a push-pull type packing plate (4). The water distributor (2) is connected with the water inlet pipe; three layers of push-pull packing layers are arranged in the reaction chamber.
The treatment process of the high-concentration sulfate organic wastewater in the device comprises the following steps: the wastewater enters the anaerobic reactor through the water distributor through the water inlet pipeline, flows from bottom to top and is mixed with the sludge. Organic matters in the wastewater are degraded into carbon dioxide, methane and water under the action of the hydrolytic fermentation flora, the hydrogen-producing acetogenic flora, the methanogen, the sulfate reducing flora and the like, sulfate is converted into hydrogen sulfide, and the hydrogen sulfide reacts with the filler in the push-pull layer to reduce the concentration of the hydrogen sulfide in the system. The filler layer can be pushed and pulled to ensure that the filler is fully contacted with the microorganism, so that the electron transfer of the microorganism is promoted, and the degradation efficiency is improved. The residual gas in the system is collected after passing through a top three-phase separator. The key for realizing the stable operation of the system is that the packing layer is reasonably arranged in the reactor. After the packing is used for a period of time, the concentration of hydrogen sulfide is measured to determine whether the packing layer is failed. After the packing layer is invalid, the graphite iron powder packing layer can be conveniently replaced by using a push-pull structure, and the stable operation of the whole system is ensured.
The novel anaerobic reactor treatment method specifically comprises the following steps of starting, regulating and controlling:
1) sludge inoculation and start-up phase: anaerobic sludge from a certain brewery UASB is inoculated into a reactor to achieve a sludge concentration in the reactor of 8-12g/L, preferably 10 g/L.
2) And (3) a normal operation stage: wastewater at the normal temperature of about 20 ℃ enters the reactor from bottom to top through the water distributor, passes through the three-layer drawing packing layer, and then flows out from the top, and gas is collected through the top three-phase separator. Ensuring that the wastewater, the sludge and the filler are fully contacted in the reactor, and the hydraulic retention time is 9-16h, preferably 12 h; monitoring effluent CODCrConcentration, ensuring CODCrThe removal rate is more than 80 percent, the sulfate radical removal rate is more than 65 percent, and the sludge age of the anaerobic reactor is controlled to be 12-20 days, preferably 15 days. If water is fed into the COD tankCrConcentration ofThe effluent concentration is higher due to too high concentration, and an effluent internal circulation mode can be adopted until the effluent CODCrThe concentration is reduced to below 500 mg/L.
3) After the anaerobic reaction system operates stably, the hydraulic retention time and the internal circulation times are adjusted by monitoring the final drainage water quality until the effluent CODCrThe concentration is less than 500 mg/L.
The utility model provides a handle novel anaerobic reactor of high concentration sulfate organic waste water compares with current traditional IC, UASB technology and has following advantage:
1) the utility model discloses can construct the novel anaerobic fermentation system of metabolism altogether that is used for high concentration sulphate organic waste water to handle by hydrolysis fermentation fungus crowd, hydrogen production acetogenic fungus crowd and sulphate reducing bacteria to constitute under 20 ℃. The novel co-metabolism anaerobic system replaces a co-metabolism anaerobic system formed by traditional hydrolytic fermentation floras, hydrogen-producing acetogenic floras and methanogens, sulfate reducing bacteria have higher metabolic activity in a very wide temperature range and are much wider than the conditions adapted by the methanogens, the tolerance capacity of the sulfate reducing bacteria to toxic substances is much higher than that of the methanogens, the novel system is much more stable than the traditional system, the normal operation under the condition of about 20 ℃ can be realized, and the traditional anaerobic system can normally operate at 35-40 ℃.
2) The utility model designs a drawer type packing layer can make iron powder and graphite alkene on the packing layer pack and waste water and the gas and the mud of production fully contact, and the hydrogen sulfide concentration that greatly reduced system produced reduces the toxic effect to the fungus crowd in the system, can show improvement fungus crowd metabolic activity, improves the waste water treatment effect. And the drawing type packing layer is convenient for replacing the ineffective packing.
3) The utility model discloses can handle the organic waste water of high sulphate high COD concentration. The sludge concentration in the reactor is high, the microbial biomass is large, the mass transfer effect is good, and the removal effect on organic matters and sulfate radicals is good; treatment of low concentration wastewater (COD)Cr2000-CrThe removal rate reaches more than 85 percent, and the effluent CODCrThe concentration is less than 500mg/L, and the sulfate radical removal rate reaches 60-65%; treating high concentration wasteWhen water (COD is 10000-15000 mg/L), the COD of the discharged water can be ensured by 2-3 times of internal circulationCrThe concentration is reduced to be below 500mg/L, and the sulfate radical removal rate is 60-65%.
4) The utility model discloses can save the one-time investment, the working costs is low, operation maintenance is convenient. The utility model discloses normally handle waste water under the condition about 20 ℃, need not heating system. The existence of high concentration sulphate can produce a large amount of hydrogen sulfide under anaerobic condition, lead to traditional biogas fermentation system very easy poisoning for domestication time is long, and the treatment cycle is long, and this technique sets up the three-layer pull formula filler plywood of packing iron powder/graphite alkene mixed packing in anaerobic system, can greatly reduced hydrogen sulfide concentration in the system, and make the microorganism hyperplasia fast, metabolic activity is high, thereby makes domestication time and treatment cycle reduce more than 30%, and the treatment effeciency improves more than 20%.
In conclusion, utilize the utility model discloses handle high sulfate COD concentration organic waste water, can practice thrift the energy consumption, practice thrift the working costs, reduce the disposable investment, stabilize water quality of water, reduce hydrogen sulfide output, the operation maintenance is simple and convenient. The utility model discloses the start-up time is short, and is effectual, has better shock resistance. The utility model discloses application in high concentration sulfate radical waste water has important meaning to industry waste water treatment energy saving and consumption reduction such as food, medicine, chemical industry, goes out water quality of water stability up to standard, reduces the production of poisonous and harmful hydrogen sulfide.
Drawings
FIG. 1 is a schematic structural diagram of a novel anaerobic reactor;
FIG. 2 shows the effect of the device on treating chondroitin sulfate wastewater.
FIG. 3 shows the hydraulic retention time of the device for treating chondroitin sulfate wastewater.
FIG. 4 is a comparison of the effect of the novel anaerobic reactor and the conventional UASB treatment.
In fig. 1: 1-reaction chamber, 2-water distributor, 3-three-phase separator and 4-push-pull type filler plate.
Detailed Description
The present invention will be further described with reference to the following drawings and examples, but the present invention is not limited to the following examples.
Example 1
A novel anaerobic reactor as shown in figure 1, comprising: a reaction chamber (1), a water distributor (2), a three-phase separator (3) and a push-pull type packing plate (4). The water distributor (2) is connected with the water inlet pipe; three layers of push-pull type packing plates are arranged in the reaction chamber.
The experimental water is taken from the wastewater of an enterprise producing chondroitin sulfate. CODCrAbout 15000mg/L, sulfate content of 2%, and pH of 7.0. Nitrogen and phosphorus were supplemented as BOD: N: P: 200:5: 1.
The specific operation is as follows:
1) sludge inoculation and start-up phase: anaerobic sludge obtained from UASB of a brewery is inoculated into a reactor to make the sludge concentration in the reactor reach 10 g/L.
2) And (3) a normal operation stage: wastewater at the normal temperature of about 20 ℃ enters the reactor from bottom to top through the water distributor, passes through the three-layer drawing packing layer, and then flows out from the top, and gas is collected through the top three-phase separator. Ensuring that the wastewater, the sludge and the filler are fully contacted in the reactor, wherein the hydraulic retention time is h, and the sludge age of the anaerobic reactor is controlled to be 15 d. Diluting raw water to domesticate sludge. The domestication process is carried out in three stages, wherein the water is fed into the first stage as raw water (COD)Cr15000mg/L) to 5000mg/L, gradually adapting the sludge as the acclimatization progresses, and CODCrAfter the removal rate is increased to more than 80%, the water inlet concentration is increased to 10000mg/L, and the second stage of domestication is carried out; wait for CODCrIncreasing the removal rate to above 80%, continuing to increase the influent water concentration to 15000mg/L (raw water), performing acclimation in the third stage, and periodically measuring CODCrAnd (4) removing rate.
3) After the acclimation of the anaerobic reaction system is finished and the operation is stable, the hydraulic retention time and the internal circulation frequency are adjusted by monitoring the final drainage water quality until the effluent CODCrThe concentration is less than 500 mg/L.
The test results are shown in fig. 2, 3 and 4. FIG. 2 is a process of domestication of chondroitin sulfate wastewater by a novel anaerobic reactor, wherein the COD removal rate can be stabilized to more than 85% at 20 deg.C after domestication for 70 days, and the effluent is passed throughAfter one internal circulation treatment, the effluent CODCrCan be reduced to below 500mg/l, and reaches the Water quality Standard for discharging sewage into urban sewers (GB/T31962-.
FIG. 3 shows that after the system operates stably, the concentration of the sulfate in the effluent of the novel anaerobic reactor after primary treatment is reduced from 21000mg/L to 5000mg/L at the temperature of 20 ℃, and the removal rate is more than 60%.
FIG. 4 is a comparison of the effect of the novel anaerobic reactor and the conventional UASB treatment after the system is stably operated. The temperature of the novel anaerobic reactor is 20 ℃, and the UASB temperature is 35 ℃. COD in two reactorsCrThe removal rate is increased along with the increase of the retention time of water power, the novel anaerobic reactor is about 12 hours, and COD (chemical oxygen demand) isCrThe removal rate basically tends to be gentle and reaches about 85 percent, namely the optimal hydraulic retention time is 12 hours; and the UASB hydraulic retention time is 15h, and the COD removal rate is only about 65%. The novel anaerobic reactor can reduce the hydraulic retention time, improve the reaction efficiency and reduce the energy consumption.
Claims (2)
1. A novel anaerobic reactor for treating organic wastewater containing high concentrations of sulfate comprising: the device comprises a reaction chamber (1), a water distributor (2), a three-phase separator (3) and a push-pull type filler plate (4); the water distributor (2) is connected with the water inlet pipe; the anaerobic reactor is characterized in that a three-layer push-pull type filling plate is arranged in a reaction chamber, so that filling materials are fully contacted with wastewater, generated waste gas and sludge, the anaerobic reactor can promote the activity of flora and reduce the influence of sulfate radicals on the reaction activity, the anaerobic reactor can stably operate at normal temperature, the energy consumption is low, and the maintenance and the operation of the anaerobic reactor are simple and convenient.
2. The novel anaerobic reactor for treating the organic wastewater containing the high-concentration sulfate according to claim 1, wherein a push-pull type filler laminate is arranged in the anaerobic reactor, so that the filler is convenient to replace.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114315045A (en) * | 2021-12-13 | 2022-04-12 | 苏沃特环境(江苏)有限公司 | Treatment system and treatment method for sulfate wastewater |
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