CN111675326A - High-concentration biological enrichment reactor and method for treating manual yellow wine wastewater by using same - Google Patents
High-concentration biological enrichment reactor and method for treating manual yellow wine wastewater by using same Download PDFInfo
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Abstract
The invention discloses a high-concentration biological enrichment reactor and a treatment method for manual yellow wine wastewater by using the same, wherein a mixture of yellow wine vinasse and municipal sludge is used as a composite strain, a good symbiotic relationship can be formed by utilizing microbial strains in the yellow wine vinasse and microbial strains in the municipal sludge, a proper domestication environment is formed, the special strain suitable for the manual yellow wine wastewater can be domesticated quickly in the later period, the activity of the special strain domesticated in the environment with high COD (chemical oxygen demand), high ammonia nitrogen, high total nitrogen and the like and the weak acid environment in the yellow wine vinasse is higher, the tolerance is more stable, and the special strain suitable for the manual yellow wine can be cultured more favorably. Meanwhile, nutrients such as starch, acetic acid, alcohols, saccharides and the like in the yellow wine vinasse are used for providing nutrients required by the domestication process, so that the domestication process and the reactor starting time are greatly shortened.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to the technical field of biochemical treatment of wastewater in the brewing industry.
Background
Yellow wine is one of three fermented ancient wines in the world, and the planned yield of the yellow wine industry is 240 thousand kiloliters by 2020 according to development guidance opinions of 'thirteen five' in the Chinese wine industry issued by the China wine industry Association. According to the survey of yellow wine industry association, the amount of wastewater produced by yellow wine wastewater per ton of wine wastewater is large, and 15-20 tons of comprehensive wastewater is produced per ton of wine.
The production process of the yellow wine sequentially comprises the processes of rice soaking, rice pouring, rice steaming, pre-fermentation, post-squeezing, wine decocting, jar filling and the like, wherein the produced wastewater in the production process mainly comprises rice pulp wastewater, pre-fermentation tank washing wastewater, tank washing wastewater with grooves, rice pouring wastewater, jar washing wastewater, sterilization wastewater, ground washing wastewater and the like, and the wastewater is rich in organic matters such as starch, acetic acid, alcohols, saccharides, proteins and the like. Compared with the machine-made yellow wine, the manual yellow wine has the advantages that the concentration of generated pollutants is higher and the pollution to the environment is more harmful due to the conditions of complex working procedures, longer brewing time, no blending and the like. The COD content in the wastewater of the manual yellow wine is as high as about 5000mg/L, the ammonia nitrogen content is as high as about 150mg/L, and the total nitrogen content is as high as about 200 mg/L. The manual yellow wine wastewater has the problems of high pollutant concentration and the like, and if the treatment fails to reach the standard, the wastewater can have great influence on downstream water plants and the surrounding environment. Along with the continuous development of the manual yellow wine industry in China, the discharge amount of waste water is larger and larger, the accompanying problem of environmental pollution is more and more prominent, the discharge standard is gradually strict, part of regions clearly stipulate that the brewing industry executes the three-level nano-tube discharge standard of Integrated wastewater discharge Standard (GB8978-1996), wherein the total nitrogen executes the Water quality Standard of Sewage discharged into urban sewers (GB/T31962-2015), the discharge limit value is less than or equal to 45mg/L, and the strict standard provides greater difficulty for the manual yellow wine waste water treatment.
The main processes for treating the wastewater at present comprise an activated sludge method, an MBR membrane method, an IC anaerobic and AO method and the like. However, the conventional improved activated sludge method has the disadvantages of long retention time, large occupied area and high construction cost, and the excessive ammonia nitrogen and total nitrogen concentration has an inhibiting effect on microorganisms, so that the sludge concentration is difficult to improve, and the removal rate of the ammonia nitrogen and the total nitrogen is low. The MBR membrane process has the best effect, but the construction cost is high, meanwhile, the yellow wine wastewater is easy to adhere to membrane filaments due to the characteristics of active strains in the yellow wine wastewater, the membrane modules need to be cleaned chemically frequently, in addition, calcium and magnesium ions in the wastewater are easy to enrich and scale on the surfaces of the membrane filaments, the service life of the membrane modules is short, and the maintenance cost is extremely high. The I C anaerobic and AO method is adopted for processing, because a large amount of nutrient elements are consumed by anaerobic treatment, the subsequent biochemical nutrition is insufficient, the sludge concentration is low, the denitrification working section needs enough carbon source to provide energy to complete, and the competition of the two process sections on the nutrient source makes the process control difficult to be stable and effectively removes a plurality of pollutant indexes such as COD, ammonia nitrogen, total nitrogen and the like. Therefore, equipment or process which can quickly enrich the sludge concentration and is economically applicable is urgently needed to solve the problem of manual yellow wine wastewater treatment.
Disclosure of Invention
The invention aims to solve the technical problem of providing a biological enrichment reactor capable of improving the number of microbial strains and the activity of strains, and solving the problem that the cooperation of various pollutants is difficult to reach the standard by using a common biochemical method, a membrane treatment method and a device for manual yellow wine wastewater.
In order to solve the technical problems, the invention adopts the following technical scheme: a high-concentration biological enrichment reactor for manual yellow wine wastewater treatment comprises a box body, wherein the box body is sequentially provided with a preposed oxygen elimination area, a primary anoxic area, a primary aerobic area, a secondary anoxic area, a secondary aerobic area and a strain enrichment and concentration area along the length direction, a partition plate is arranged between every two adjacent areas for separation, and wastewater treatment flow is realized through a water through hole;
the primary anoxic zone, the primary aerobic zone, the secondary anoxic zone and the secondary aerobic zone are filled with microorganism carrier fillers in the middle of the height of the box body, and submersible stirrers are arranged at the bottoms of the preposed anoxic zone, the primary anoxic zone and the secondary anoxic zone;
aeration systems are arranged at the bottoms of the primary aerobic zone and the secondary aerobic zone;
the strain enrichment and concentration area is provided with a guide plate for guiding the pretreated wastewater and a reflecting plate for realizing cross flow, solid-liquid separation of the wastewater entering the strain enrichment and concentration area is realized, sludge strains are precipitated and enriched at the bottom of the strain enrichment and concentration area, chamfers convenient for enrichment and concentration of the sludge strains are arranged on the periphery of the bottom of the strain enrichment and concentration area, and a water outlet weir is arranged on one side of the tail end of the length of the box body in the strain enrichment and concentration area;
the bottom of the secondary aerobic zone and the bottom of the strain enrichment and concentration zone are connected with a reflux inoculation system which is respectively used for refluxing the nitrifying liquid in the secondary aerobic zone to the preposed oxygen-eliminating zone, and the concentrated sludge strain in the strain enrichment layer at the bottom of the strain enrichment and concentration zone reflows to the primary anoxic zone and the secondary anoxic zone.
Preferably, the guide plate is located in the middle of the length of the strain enrichment and concentration area and is perpendicular to the length direction of the strain enrichment and concentration area, the guide plate extends to the middle from the top of the strain enrichment and concentration area, and the reflecting plate is perpendicularly connected with the bottom end of the guide plate.
Preferably, the height of the guide plate accounts for 1/3-1/2 of the total height of the box body, the width of the reflecting plate is equal to the width of the box body, and the length of the reflecting plate accounts for 1/4-1/2 of the width of the box body.
Preferably, the top of the enrichment concentration area is provided with a water distribution plate horizontally placed below the water passing holes, and the water distribution plate is uniformly provided with water distribution holes for uniformly distributing the wastewater below the water distribution plate.
Preferably, the chamfer angle at the bottom of the strain enrichment and concentration area is 45-75 degrees, and the volume of the chamfer angle area at the bottom accounts for 1/5-1/4 of the volume of the whole strain enrichment and concentration area.
Preferably, the microorganism carrier filler is made of hydrophilic polyurethane material and is filled between the upper layer of filler support net and the lower layer of filler support net.
Preferably, the proportion of the preposed oxygen eliminating area in the length of the box body is 5-10%, the proportion of the first-stage oxygen eliminating area in the length of the box body is 25-30%, the proportion of the first-stage aerobic area in the length of the box body is 10-15%, the proportion of the second-stage anoxic area in the length of the box body is 10-15%, the proportion of the second-stage aerobic area in the length of the box body is 5-10%, and the proportion of the strain enrichment and concentration area in the length of the box body is 15-20%.
The invention also provides a manual yellow wine wastewater treatment method, which adopts the high-concentration biological enrichment reactor for manual yellow wine wastewater treatment to carry out treatment and comprises the following steps:
(1) after pretreatment, the yellow wine wastewater enters a mixing tank for water quality mixing;
(2) the effluent water obtained in the step (1) enters a high-concentration biological enrichment reactor for activated sludge and biofilm treatment, when the reactor is started to culture, composite sludge strains are added, a primary aerobic zone and a secondary aerobic zone are subjected to mixed aeration by adopting an aeration system, a preposed oxygen-eliminating zone, a primary anoxic zone and a secondary anoxic zone are fully mixed by adopting a submersible stirrer, so that microbial carrier fillers in the reactor are fluidized, enrichment and concentration of the strains at the bottom are realized by flow guide of a strain enrichment and concentration zone guide plate and cross flow of a reflecting plate, concentrated sludge strains flow back to the primary anoxic zone and the secondary anoxic zone through a backflow inoculation system, nitrified liquid flows back to the preposed oxygen-eliminating zone, the ratio of backflow flow and inflow flow of the concentrated sludge strains is controlled to be 1: 2-1: 1, and the ratio of backflow flow and inflow flow of the nitrified liquid is controlled to be 2: 1-3: 1;
(3) and (3) enabling the effluent obtained in the step (2) to enter a secondary sedimentation tank, and controlling the ratio of the backflow flow rate of the precipitated sludge to the inflow flow rate of the precipitated sludge according to 1: and (3) the reflux ratio is 4-1: 2, the reflux ratio is high to a preposed oxygen elimination area of the high-density biological enrichment reactor, and the supernatant reaches the standard and is discharged.
Preferably, the composite sludge strain comprises a mixture of yellow wine vinasse and municipal dewatered sludge, wherein the percentage of the yellow wine vinasse is 10% -20%, the percentage of the municipal dewatered sludge is 80% -90%, and the water content of the municipal dewatered sludge is 80% -85%.
Preferably, the composite sludge strain is stirred, mixed and naturally cured for 4 hours, then a glucose additive is added into the composite sludge strain for acclimatization, the acclimatization time is 24 hours, the glucose additive accounts for 5-10% of the content of the composite sludge strain, and the acclimatized composite sludge strain is added according to the adding ratio of 8-10 kg of composite sludge strain per cubic meter of wastewater; and stopping water inflow after the composite sludge strain is added, and aeration for 2-3 days, and then gradually increasing the water amount to normal water inflow.
The technical scheme adopted by the invention has the following beneficial effects:
1. the traditional anaerobic process is cancelled, the competitive consumption of the traditional I C anaerobic process section on the carbon source is avoided, the carbon source of the manual yellow wine wastewater is fully utilized as a denitrification nutrient source, the utilization rate of the carbon source is improved, the energy consumption is reduced, and meanwhile, the engineering investment and the operation cost are reduced.
2. Set up a bacterial enrichment concentrated zone alone in biochemical reaction pond, through the board water distribution of joining in marriage, guide plate water conservancy diversion and reflecting plate cross-flow effect improve solid-liquid separation efficiency, make the mud concentration in the biological reaction pond can last stably reach 15000 ~ 20000mg/L, sewage treatment load improves 4 ~ 5 times, the bacterial is to COD in the unit volume greatly improved, the treatment effeciency of ammonia nitrogen, the bacterial enrichment concentrated zone can ensure the lasting stability of denitrifying bacterial mud concentration in the whole biological enrichment reactor simultaneously, bacterial quantity and bacterial activity have been ensured, then make denitrifying bacteria can last denitrogenate, be favorable to COD, the ammonia nitrogen, several pollutant indexes such as total nitrogen are effectively got rid of, it is up to standard to have realized each pollutant in coordination.
3. The mixture of the yellow wine vinasse and the municipal sludge is used as a composite strain, a good symbiotic relationship can be formed by using microbial strains in the yellow wine vinasse and microbial strains in the municipal sludge, a proper domestication environment is formed, the specific strain suitable for the manual yellow wine wastewater can be fast domesticated in the later period, the specific strain domesticated in the environment with high COD (chemical oxygen demand), high ammonia nitrogen, high total nitrogen and other pollutants in the yellow wine vinasse and the weak acid environment is higher in activity and more stable in tolerance, and the specific strain suitable for the manual yellow wine can be cultured more favorably. Meanwhile, nutrients such as starch, acetic acid, alcohols, saccharides and the like in the yellow wine vinasse are used for providing nutrients required by the domestication process, so that the domestication process and the reactor starting time are greatly shortened.
4. The multi-stage AO process and the biomembrane process are combined, so that the nitrification and denitrification functions are enhanced, the denitrification efficiency is improved, the multi-stage AO process can flexibly regulate and control nutrient elements, a carbon source is saved, the advantages of the membrane process are achieved, microorganisms on the filler are quickly released and supplemented into the mixed liquid under the condition that the quality of inlet water is possibly deteriorated, the total microorganism amount in the bioreactor is ensured, and meanwhile, the biomembrane continuously and newly breeds from outside to inside, so that the dynamic balance of the whole microorganism community is maintained.
The following detailed description will explain the present invention and its advantages.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the structure of the high concentration bio-concentration reactor of the present invention:
in the figure: 1-a pre-anoxic zone; 11-a submersible mixer; 2-first-stage anoxic zone; 21-interception screen mesh and 22-microorganism carrier filler; 3-first-stage aerobic zone; 31-an aerator pipe; 4-a secondary anoxic zone; 5-a secondary aerobic zone; 51-a pump; 6-strain enrichment and concentration area; 61-a baffle; 62-a reflector plate; 63-an effluent weir; 7-a separator; 8-a grid cover plate; 9-water through hole.
FIG. 2 is a flow chart of the process for applying the high concentration bio-concentration reactor of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.
In the description of the embodiments of the present invention, the terms "upper", "lower", "left", "right", "lateral", "longitudinal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, all percentages are by weight unless otherwise specified, and the equipment and materials employed are commercially available or commonly used in the art.
Example one
Referring to fig. 1, the present embodiment provides a high concentration biological enrichment reactor for manual yellow wine wastewater treatment, the biological enrichment reactor main body is a box body, the box body comprises a preposed anoxic zone 1, a primary anoxic zone 2, a primary aerobic zone 3, a secondary anoxic zone 4, a secondary aerobic zone 5, and an enrichment concentration zone 6, each zone is separated by a partition plate 7, the flow of treated wastewater is realized through water passing holes, and a grid cover plate 8 made of glass fiber reinforced plastics is covered on the box body.
Wherein, the first-stage anoxic zone, the first-stage aerobic zone, the second-stage anoxic zone and the second-stage aerobic zone are filled with microorganism carrier filler 22 in the middle of the height of the box body. The bottom of the preposed oxygen elimination area, the primary oxygen deficiency area and the secondary oxygen deficiency area is provided with a submersible mixer 11. And aeration systems are arranged at the bottoms of the first-stage aerobic zone and the second-stage aerobic zone.
Specifically, the submersible stirrer 11 is installed at the bottom of the front anoxic zone 1, and is hung at the bottom of the front anoxic zone through a mounting frame, so that sludge in the reaction zone can be in a suspension state, and the water passing hole 9 at the top of the side surface of the sludge is communicated with the first-stage anoxic zone 2.
Microorganism carrier filler 22 is filled in the space at 2 box middle parts in one-level anoxic zone, and is fixed through upper and lower two-layer interception screen 21, and submersible mixer 11 is also installed to the bottom half, hoists in one-level anoxic zone bottom through the mounting bracket, makes the mud in the reaction zone can be in the suspended state, and inside carrier filler is in fluidized state, and the water hole 9 that crosses that is located its side bottom makes it be linked together with one-level aerobic zone 3.
Microbial carrier filler 22 is filled in the space in the middle of the box body of the first-stage aerobic zone 3 and is fixed by upper and lower layers of intercepting screens 21, and an aeration system is arranged at the bottom of the box body. The aeration system comprises aeration pipe 31 that fan and fan air outlet are linked together, and aeration pipe sets up 45 trompils of slope downwards, prevents that mud from blockking up the aeration hole, and the aeration rate sets up the concentration of Dissolved Oxygen (DO) in the reactor to be 2.0 ~ 4.0mg/L, and inside carrier filler is in fluidization state, and the hole 9 of crossing that is located its side top makes it be linked together with second grade anoxic zone 4.
Microorganism carrier filler 22 is filled in the space in the middle of the box body of the second-stage anoxic zone 4, the two layers of intercepting screens 21 are fixed, a submersible stirrer 11 is also installed at the bottom of the box body, the two layers of intercepting screens are hung at the bottom of the second-stage anoxic zone through a mounting frame, sludge in the reaction zone can be in a suspension state, the inside carrier filler is in a fluidization state, and the water passing hole 9 at the bottom of the side face of the inside carrier filler is communicated with the second-stage aerobic zone 5.
Microbial carrier filler 22 is also filled in the space in the middle of the box body of the second-stage aerobic zone 5 and is fixed by the upper and lower layers of intercepting screens 21, and an aeration system is arranged at the bottom of the box body. The aeration system is composed of aeration pipes 31 communicated with a fan and a fan air outlet, the aeration pipes are obliquely opened 45 degrees downwards to prevent sludge from blocking aeration holes, the aeration amount is set to be 2.0-4.0 mg/L of the concentration of Dissolved Oxygen (DO) in the reactor, the internal carrier filler is in a fluidized state, and the water passing holes 9 positioned at the top of the side surface of the carrier filler are communicated with the enrichment concentration area 6. The bottom of the secondary aerobic zone 5 is provided with a pump 51 for returning the nitrified liquid in the secondary aerobic zone 5 to the pre-anoxic zone 1.
The top of the enrichment concentration area is provided with a horizontally arranged water distribution plate 61, the water distribution plate is positioned below the water passing hole 9 at the top of the side surface, the water distribution plate 61 is provided with a water distribution hole 62 with the diameter of phi 80mm, the central distance between the two adjacent water distribution holes 62 is 100mm, the water distribution holes are uniformly distributed on the water distribution plate 61 in a honeycomb shape, and the mixed liquid is conveniently and uniformly distributed below the water distribution plate 61. Reduce impact and disturbance, and improve the concentration effect.
And chamfers are arranged on the periphery of the bottom of the enrichment concentration area 6, the chamfers are 45-75 degrees, preferably 60 degrees, and the volume of the chamfer area at the bottom accounts for 1/5-1/4 of the volume of the whole strain enrichment concentration area. The sludge strain is convenient to enrich and concentrate, and the local dead angle is prevented from being formed.
In addition, still set up guide plate 63 and reflecting plate 64, guide plate 63 is located the length intermediate position of bacterial enrichment concentrated zone and is perpendicular with bacterial enrichment concentrated zone length direction, guide plate 64 extends to the middle part from the top in bacterial enrichment concentrated zone, reflecting plate 64 is connected perpendicularly and both ends extend to bacterial enrichment concentrated zone length both sides wall respectively with guide plate 63 bottom. The height of the guide plate 63 accounts for 1/3-1/2 of the total height of the box body, the periphery of the reflection plate 64 is perpendicular to each side face of the box body, the width of the reflection plate is equal to the width of the box body, and the length of the reflection plate accounts for 1/4-1/2 of the total width of the box body.
The end of the box body is provided with a water outlet weir 65, the bottom of the enrichment concentration area 6 is provided with a pump 51 for refluxing the concentrated sludge strains in the enrichment concentration area 6 to the first-stage anoxic area 2 for inoculation, and the biomass is rapidly improved.
The microbial carrier filler is made of hydrophilic polyurethane materials, the specification of a single carrier of the microbial carrier filler is phi 20mm × 4mm, the aperture of an interception screen is 15mm, and the specific surface area of the filler is 20000-30000 m2/m3. The filling ratio of the anoxic tank is 0.1-0.2, and the filling ratio of the aerobic tank is 0.2-0.3.
The proportion of the preposed oxygen-eliminating area in the length of the box body is 5-10%, the proportion of the first-stage oxygen-lacking area in the length of the box body is 25-30%, the proportion of the first-stage aerobic area in the length of the box body is 10-15%, the proportion of the second-stage anoxic area in the length of the box body is 10-15%, the proportion of the second-stage aerobic area in the length of the box body is 5-10%, and the proportion of the strain enrichment and concentration area in the length of the box body is 15-20%.
Example two
Referring to fig. 2, the second embodiment provides a manual yellow wine wastewater treatment method, which uses the high-concentration biological enrichment reactor provided in the first embodiment, and the method includes the following steps:
the method comprises the following steps: after pretreatment, the manual yellow wine wastewater enters a mixing tank for water quality mixing, wherein the pretreatment measures comprise a coarse grid, a screen and the like, mainly include impurity interception, subsequent facility treatment load reduction and effluent water quality control in the step: COD is 4000-5000 mg/L, ammonia nitrogen is 120-160 mg/L, and total nitrogen is 150-200 mg/L. The effluent enters a biological enrichment reactor, and the B/C ratio is more than 0.4.
Step two: the effluent water of the step one enters a high-concentration biological enrichment reactor to be treated by activated sludge and biomembrane, wherein the first-stage aerobic zone 3 and the second-stage aerobic zone 5 adopt an aeration system for mixed aeration, the preposed anoxic zone 1, the first-stage anoxic zone 2 and the second-stage anoxic zone 4 adopt a submersible stirrer 11 for full mixing, so that the microbial carrier filler 22 in the reactor is fluidized, water is distributed through the water distribution holes 62 on the water distribution plate 61 of the enrichment and concentration area, then the bacteria are enriched and concentrated at the bottom by the diversion of the diversion plate 63 and the cross flow of the reflection plate 64, forming a compact strain enrichment layer at the bottom, enabling the enriched concentrated sludge strain to flow back to a first-stage anoxic zone and a second-stage anoxic zone through a reflux inoculation system, enabling a nitrifying liquid to flow back to a preposed anoxic zone, controlling the ratio of the reflux flow rate of the concentrated sludge strain to the water inflow rate to be 1: 2-1: 1, and controlling the ratio of the reflux flow rate of the nitrifying liquid to the water inflow rate to be 2: 1-3: 1.
In the early stage of starting the reactor, a composite sludge strain is required to be domesticated 24 hours in advance, the composite sludge strain comprises a mixture of yellow wine vinasse and municipal dewatered sludge, the percentage of the yellow wine vinasse is 10% -20%, the percentage of the municipal dewatered sludge is 80% -90%, and the water content of the municipal dewatered sludge is 80% -85%. Stirring and mixing the composite sludge strain, naturally curing for 4 hours, adding a glucose additive into the composite sludge strain for acclimatization, wherein the acclimatization time is 24 hours, the glucose additive accounts for 5-10% of the content of the composite sludge strain, and the acclimatized composite sludge strain is added according to the adding ratio of 8-10 kg of composite sludge strain per cubic meter of wastewater; and stopping water inflow after the composite sludge strain is added, and aeration for 2-3 days, and then gradually increasing the water amount to normal water inflow.
After being treated by the high-concentration biological enrichment reactor, the effluent quality COD of the wastewater is less than 200mg/L, the ammonia nitrogen is less than 15mg/L, and the total N is less than 45 mg/L.
Step three: and (2) enabling the effluent obtained in the step two to enter a secondary sedimentation tank, settling to realize solid-liquid separation, controlling the concentration of the sludge in the effluent of the reactor to be about 3000-5000 mg/L, and controlling the ratio of the backflow flow rate of the settled sludge to the inflow flow rate of the settled sludge to be 1: and (3) the reflux ratio is 4-1: 2, the reflux ratio is high to a preposed oxygen elimination area of the high-density biological enrichment reactor, and the supernatant reaches the standard and is discharged.
The manual yellow wine wastewater treatment method cancels the traditional anaerobic process, avoids the competitive consumption of the traditional I C anaerobic process segment on carbon sources, fully utilizes the carbon sources of the manual yellow wine wastewater as denitrification nutrient sources, improves the utilization rate of the carbon sources, reduces the energy consumption, and simultaneously reduces the engineering investment and the operation cost.
In addition, the enrichment concentration area improves the solid-liquid separation efficiency through the water distribution of the water distribution plate, the flow guide of the guide plate and the cross flow effect of the reflecting plate, so that the sludge concentration in the biological reaction tank can continuously and stably reach 15000-20000 mg/L, the sewage treatment load is improved by 4-5 times, the treatment efficiency of strains on COD and ammonia nitrogen in unit volume is greatly improved, meanwhile, the continuous stability of the sludge concentration of denitrifying strains in the whole biological enrichment reactor can be ensured by the strain enrichment concentration area, the number of strains and the activity of the strains are ensured, then, denitrifying bacteria can continuously denitrify, the COD, ammonia nitrogen, total nitrogen and other pollutant indexes are effectively removed, and the cooperative standard reaching of each pollutant is realized.
The mixture of the yellow wine vinasse and the municipal sludge is used as a composite strain, a good symbiotic relationship can be formed by using microbial strains in the yellow wine vinasse and microbial strains in the municipal sludge, a proper domestication environment is formed, the specific strain suitable for the manual yellow wine wastewater can be fast domesticated in the later period, the specific strain domesticated in the environment with high COD (chemical oxygen demand), high ammonia nitrogen, high total nitrogen and other pollutants in the yellow wine vinasse and the weak acid environment is higher in activity and more stable in tolerance, and the specific strain suitable for the manual yellow wine can be cultured more favorably. Meanwhile, nutrients such as starch, acetic acid, alcohols, saccharides and the like in the yellow wine vinasse are used for providing nutrients required by the domestication process, so that the domestication process and the reactor starting time are greatly shortened.
The multi-stage AO process and the biomembrane process are combined, so that the nitrification and denitrification functions are enhanced, the denitrification efficiency is improved, the multi-stage AO process can flexibly regulate and control nutrient elements, a carbon source is saved, the advantages of the membrane process are achieved, microorganisms on the filler are quickly released and supplemented into the mixed liquid under the condition that the quality of inlet water is possibly deteriorated, the total microorganism amount in the bioreactor is ensured, and meanwhile, the biomembrane continuously and newly breeds from outside to inside, so that the dynamic balance of the whole microorganism community is maintained.
The following table shows the treatment effect of CODcr, ammonia nitrogen and total nitrogen of effluent of the manual yellow wine wastewater with different concentrations after the manual yellow wine wastewater is treated by a high-concentration biological enrichment reactor.
Remarking: all units are mg/L.
Aiming at the manual yellow wine wastewater, some Shaoxing wine Limited company in Shaoxing City of Zhejiang province adopts the treatment method and the treatment system to treat the manual yellow wine wastewater. The sewage system stably operates, the CODcr content of the final effluent water quality is 200m/L through determination, the total nitrogen content is 45mg/L, the ammonia nitrogen content is below 15mg/L, in the operation stage, the manual yellow wine wastewater self-nutrition source is used without an external carbon source, the sludge concentration content in the reactor is kept between 15000 and 20000mg/L, the three-level nano-tube discharge standard of Integrated wastewater discharge Standard (GB8978-1996) can be reached, wherein the total nitrogen executes the Water quality Standard of Sewage discharge to urban sewer 962 (GB/T312015), and the discharge limit value is less than or equal to 45 mg/L.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in other forms without departing from the spirit or essential characteristics thereof. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (10)
1. A high concentration biological enrichment reactor for manual yellow wine wastewater treatment is characterized in that: the device comprises a box body, wherein a preposed oxygen-eliminating area, a primary anoxic area, a primary aerobic area, a secondary anoxic area, a secondary aerobic area and a strain enrichment and concentration area are sequentially arranged in the box body along the length direction, and a partition plate is arranged between every two adjacent areas for separating and realizing the flow of treated wastewater through a water through hole;
the primary anoxic zone, the primary aerobic zone, the secondary anoxic zone and the secondary aerobic zone are filled with microorganism carrier fillers in the middle of the height of the box body, and submersible stirrers are arranged at the bottoms of the preposed anoxic zone, the primary anoxic zone and the secondary anoxic zone;
aeration systems are arranged at the bottoms of the primary aerobic zone and the secondary aerobic zone;
the strain enrichment and concentration area is provided with a guide plate for guiding the pretreated wastewater and a reflecting plate for realizing cross flow, solid-liquid separation of the wastewater entering the strain enrichment and concentration area is realized, sludge strains are precipitated and enriched at the bottom of the strain enrichment and concentration area, chamfers convenient for enrichment and concentration of the sludge strains are arranged on the periphery of the bottom of the strain enrichment and concentration area, and a water outlet weir is arranged on one side of the tail end of the length of the box body in the strain enrichment and concentration area;
and the bottoms of the secondary aerobic zone and the strain enrichment and concentration zone are connected with a reflux inoculation system respectively for refluxing the nitrifying liquid in the secondary aerobic zone to the preposed anoxic zone, and the concentrated sludge strains at the bottom of the strain enrichment and concentration zone are refluxed to the primary anoxic zone and the secondary anoxic zone.
2. The high-concentration biological enrichment reactor for manual yellow wine wastewater treatment according to claim 1, characterized in that: the guide plate is located the length intermediate position of bacterial enrichment concentrated zone and is perpendicular with bacterial enrichment concentrated zone length direction, the guide plate extends to the middle part from the top in bacterial enrichment concentrated zone, the reflecting plate is connected with the guide plate bottom is perpendicular.
3. The high-concentration biological enrichment reactor for manual yellow wine wastewater treatment according to claim 2, characterized in that: the height of the guide plate accounts for 1/3-1/2 of the total height of the box body, the width of the reflection plate is equal to the width of the box body, and the length of the reflection plate accounts for 1/4-1/2 of the width of the box body.
4. The high-concentration biological enrichment reactor for manual yellow wine wastewater treatment according to claim 1, characterized in that: the top of the enrichment concentration area is provided with a water distribution plate which is horizontally placed below the water passing holes, and the water distribution plate is uniformly provided with water distribution holes for uniformly distributing the wastewater to the lower part of the water distribution plate.
5. The high-concentration biological enrichment reactor for manual yellow wine wastewater treatment according to claim 1, characterized in that: the bottom chamfer angle of the strain enrichment and concentration area is 45-75 degrees, and the volume of the chamfer angle area at the bottom accounts for 1/5-1/4 of the volume of the whole strain enrichment and concentration area.
6. The high-concentration biological enrichment reactor for manual yellow wine wastewater treatment according to any one of claims 1 to 5, characterized in that: the microbial carrier filler is made of hydrophilic polyurethane material and is filled between the upper layer filler supporting net and the lower layer filler supporting net.
7. The high-concentration biological enrichment reactor for manual yellow wine wastewater treatment according to claim 6, characterized in that: the proportion of the preposed oxygen elimination area in the length of the box body is 5-10%, the proportion of the first-stage oxygen elimination area in the length of the box body is 25-30%, the proportion of the first-stage aerobic area in the length of the box body is 10-15%, the proportion of the second-stage anoxic area in the length of the box body is 10-15%, the proportion of the second-stage aerobic area in the length of the box body is 5-10%, and the proportion of the strain enrichment concentration area in the length of the box body is 15-20%.
8. The manual yellow wine wastewater treatment method adopts the high-concentration biological enrichment reactor for manual yellow wine wastewater treatment, which is disclosed by any one of claims 1 to 7, and is characterized by comprising the following steps of:
(1) after pretreatment, the yellow wine wastewater enters a mixing tank for water quality mixing;
(2) the effluent water obtained in the step (1) enters a high-concentration biological enrichment reactor for activated sludge and biofilm treatment, when the reactor is started to culture, composite sludge strains are added, a primary aerobic zone and a secondary aerobic zone are subjected to mixed aeration by adopting an aeration system, a preposed oxygen-eliminating zone, a primary anoxic zone and a secondary anoxic zone are fully mixed by adopting a submersible stirrer, so that microbial carrier fillers in the reactor are fluidized, enrichment and concentration of the strains at the bottom are realized by flow guide of a strain enrichment and concentration zone guide plate and cross flow of a reflecting plate, concentrated sludge strains flow back to the primary anoxic zone and the secondary anoxic zone through a backflow inoculation system, nitrified liquid flows back to the preposed oxygen-eliminating zone, the ratio of backflow flow and inflow flow of the concentrated sludge strains is controlled to be 1: 2-1: 1, and the ratio of backflow flow and inflow flow of the nitrified liquid is controlled to be 2: 1-3: 1;
(3) and (3) enabling the effluent obtained in the step (2) to enter a secondary sedimentation tank, and controlling the ratio of the backflow flow rate of the precipitated sludge to the inflow flow rate of the precipitated sludge according to 1: and (3) the reflux ratio is 4-1: 2, the reflux ratio is high to a preposed oxygen elimination area of the high-density biological enrichment reactor, and the supernatant reaches the standard and is discharged.
9. The manual yellow wine wastewater treatment method according to claim 8, characterized in that: the composite sludge strain comprises a mixture of yellow wine vinasse and municipal dewatered sludge, wherein the percentage of the yellow wine vinasse is 10-20%, the percentage of the municipal dewatered sludge is 80-90%, and the water content of the municipal dewatered sludge is 80-85%.
10. The manual yellow wine wastewater treatment method according to claim 9, characterized in that: stirring and mixing the composite sludge strain, naturally curing for 4 hours, adding a glucose additive into the composite sludge strain for acclimatization, wherein the acclimatization time is 24 hours, the glucose additive accounts for 5-10% of the content of the composite sludge strain, and the acclimatized composite sludge strain is added according to the adding ratio of 8-10 kg of composite sludge strain per cubic meter of wastewater; and stopping water inflow after the composite sludge strain is added, and aeration for 2-3 days, and then gradually increasing the water amount to normal water inflow.
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