CN209872512U - Intermittent expansion anaerobic biological filter - Google Patents
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- CN209872512U CN209872512U CN201920530417.7U CN201920530417U CN209872512U CN 209872512 U CN209872512 U CN 209872512U CN 201920530417 U CN201920530417 U CN 201920530417U CN 209872512 U CN209872512 U CN 209872512U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 136
- 239000007788 liquid Substances 0.000 claims abstract description 76
- 239000000945 filler Substances 0.000 claims abstract description 67
- 238000005191 phase separation Methods 0.000 claims abstract description 16
- 239000010802 sludge Substances 0.000 claims description 61
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 2
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- 238000011049 filling Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 description 30
- 239000010865 sewage Substances 0.000 description 11
- 239000003344 environmental pollutant Substances 0.000 description 8
- 231100000719 pollutant Toxicity 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
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- 238000006243 chemical reaction Methods 0.000 description 6
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Abstract
The utility model discloses an intermittent expansion anaerobic biofilter, which comprises a reactor tank body, wherein a liquid distribution area, a filling expansion area, a three-phase separation area and a clear water area are sequentially arranged in the reactor tank body from bottom to top; a liquid inlet is formed in the side wall of the lower side of the reactor tank body, a liquid outlet is formed in the side wall of the upper side of the reactor tank body, and an exhaust port is formed in the top wall of the reactor tank body; the liquid distribution area is at least provided with a water inlet distributor communicated with the liquid inlet, the filler area is filled with a filler layer, the three-phase separation area is internally provided with a three-phase separator, and the liquid outlet is communicated with the clear water area; a circulating water pump is arranged outside the reactor tank body, at least one spiral circulating water distributor is also arranged in the liquid distribution area, a liquid inlet of the circulating water pump is communicated with the filler expansion area through a first connecting pipe, a liquid outlet of the circulating water pump is communicated with a second connecting pipe, and the second connecting pipe is communicated with each spiral circulating water distributor; compared with the prior art, the utility model, start cycle has been shortened.
Description
Technical Field
The utility model relates to the technical field of filters, concretely relates to intermittent type inflation anaerobism biofilter.
Background
The current types of advanced anaerobic reactors are UASB reactors, EGSB anaerobic reactors, IC anaerobic reactors.
The USAB reactor is called Up-flow Anaerobic Sludge bed reactor UASB reactor (Up-flow Anaerobic Sludge Blanket). In 1971, the university of agriculture, Latin lattice (Lettinga) in the Netherlands, Vangeningen (Wageningen) teaches that a three-phase separator is invented by using the difference of the action of a gravity field on substances with different densities through a physical structure design. The activated sludge residence time is separated from the wastewater residence time to form a prototype of an Upflow Anaerobic Sludge Blanket (UASB) reactor. In the lower part of the reaction zone of the UASB reactor, an anaerobic sludge bed is formed by sludge (usually granular sludge) with good sedimentation performance, and the sludge concentration can reach 50-100g/l higher. Enters the reaction zone from the bottom of the reactor, forms good natural stirring action due to the upward flow of water and the rising of a large amount of generated gas, and forms a relatively thin sludge suspension zone above the reaction zone by a part of sludge, wherein the sludge concentration in the suspension zone is generally in the range of 5-40 g/l. The suspension liquid enters a settling chamber of the separation area, sludge settles at the settling chamber, the sludge returns to the reaction area from the inclined plane, and the clarified treated water overflows and is discharged.
The EGSB anaerobic reactor was the research of anaerobic Expanded Granular Sludge Bed (EGSB) reactor in the early 90 s of the 20 th century, the university of agriculture of Wageningen, the Netherlands. The EGSB reactor is actually a modified UASB reactor, except that the former has a higher liquid upflow rate, causing the entire isolated sludge bed to be in an expanded state, and this unique feature makes it possible to have a larger height to diameter ratio. The EGSB reactor mainly comprises a main body part, a water inlet distribution system, a gas-solid-liquid three-phase separator, a water outlet circulation and the like. Wherein, the water inlet distribution system is used for uniformly distributing inlet water to the bottom of the whole reactor to generate a uniform ascending flow speed; the three-phase separator is the most key structure of the EGSB reactor, can effectively separate three phases of effluent, methane and sludge, and enables the sludge to effectively stay in the reactor; the water outlet circulation part is used for improving the rising flow speed of the liquid surface in the reactor, so that the granular sludge is fully contacted with the wastewater, and the generation of dead angles and short flow in the reactor is avoided.
The IC anaerobic reactor is an internal circulation anaerobic reactor (IC), which is a new generation of high-efficiency anaerobic reactor, is developed successfully by the Dutch Paques company on the basis of a UASB reactor in the middle of the 80 th century in 20 th century, and the technology is rapidly applied to production after 1986. The IC reactor is actually formed by stacking two UASB reactors in series, bottom and top, and comprises 4 different functional units: a mixing section, an expanded bed section, a polishing section, and a reflux section. The reactor has two three-phase separators to allow efficient biomass retention. Because most of the biogas is separated in the primary separator, the interior of the fine treatment part is almost free from disturbance, so that the secondary separator is not influenced by high gas flow velocity, and can effectively separate out granular sludge in water. The influent water and the recirculated mud water are fully mixed in the expanded bed section to dilute and regulate the influent water and form a dense anaerobic sludge expanded bed therein. The result of the internal circulation of the IC reactor makes the expanded bed part not only have very high biomass, very long sludge retention time, but also have very high biomass, very long retention time and very high liquid rising flow rate, so that the partial granular sludge completely reaches a fluidized state, the mass transfer efficiency in the reactor is greatly increased, the biochemical reaction rate is obviously increased, and the capacity of the reactor for removing organic matters is greatly improved.
The three advanced anaerobic reactors are recognized in the field of environmental protection at present, have the highest pollutant removal efficiency and similar internal structures, and are commonly used in the anaerobic treatment stage of high-concentration wastewater; a common disadvantage is the long start-up period (time from the moment the reactor is put into service until it reaches normal operation), which is: the UASB process is 3-5 months and the IC and EGSB start-up period is 5-11 months, slow start-up periods prevent the use of these reactors in larger areas.
SUMMERY OF THE UTILITY MODEL
To the deficiency that exists among the prior art, the utility model aims to provide an intermittent type inflation anaerobism biofilter to solve among the prior art, the problem of anaerobic reactor's start-up cycle length.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the intermittent expansion anaerobic biological filter comprises a reactor tank body, wherein a liquid distribution area, a filling expansion area, a three-phase separation area and a clear water area are sequentially arranged in the reactor tank body from bottom to top; a liquid inlet is formed in the side wall of the lower side of the reactor tank body, a liquid outlet is formed in the side wall of the upper side of the reactor tank body, and an exhaust port is formed in the top wall of the reactor tank body;
the liquid distribution area is at least provided with a water inlet distributor communicated with the liquid inlet, the filler area is filled with a filler layer, the three-phase separation area is internally provided with a three-phase separator, and the liquid outlet is communicated with the clear water area;
a circulating water pump is arranged outside the reactor tank body, at least one spiral circulating water distributor is further arranged in the liquid distribution area, a liquid inlet of the circulating water pump is communicated with the filler expansion area through a first connecting pipe, a liquid outlet of the circulating water pump is communicated with a second connecting pipe, and the second connecting pipe is communicated with each spiral circulating water distributor.
The working principle is as follows: in sewage from the leading-in water distributor of inlet, sewage is by the even leading-in filler district of water distributor that intakes, and impurity in the sewage is in filler district and filler expansion zone realizes the filtration of impurity through the three state of filler, and three state is respectively: the filler is in a standing state, a filler expansion state and a filler re-precipitation state, then the solid, liquid and gas are separated through a three-phase separator in a three-phase separation area, the gas is discharged from an exhaust port for separation, the liquid, namely clear water, enters a clear water area and is discharged from a liquid outlet, and the solid enters the filler expansion area for collection.
And (3) the standing state of the filler: the filler is in static, and sewage passes through the packing layer from bottom to top in the reactor through the water distributor of intaking, and filtering capability is accomplished to the packing layer, and most Suspended Solid (SS) are held back by the packing layer, and the pollutant is in the bottom of packing at first, and along with going on constantly of operation, the pollutant moves up gradually, until the packing layer reaches the jam state. The filler layer intercepts most of organic matters and quickly collects pollutants.
Pollutants are collected in the filler layer and are temporarily fixed, then the internal respiration biological reaction of anaerobic bacteria occurs, organic matters are decomposed, and more activated sludge is formed.
The expansion state of the filler: second state of the packing: starting a circulating water pump under the condition that the packing layer is determined not to be blocked, sucking water in the packing expansion area or the upper part of the packing expansion area into the circulating water pump, uniformly distributing the water into a liquid distribution area through a spiral circulating water distributor, wherein the packing layer generates rotation or turbulent ascending motion under the impact of a large-flow water body, is in a motion state under the driving of power and uniformly moves along with water flow and floats in the packing area and the packing expansion area; the fixed pollutants are intercepted by the packing layer originally, one part of the pollutants stays in the gaps of the packing layer continuously, and the other part of the pollutants is flushed and drifted in water by the water body.
The packing is in a re-precipitation state: when the filler is in a filler expansion state and reaches a complete floating state, the circulating water pump stops running, the floating filler layer loses power, a sinking phenomenon occurs, the substances with high density settle fast, and the substances with low density settle slowly; the packing layer has higher density, and firstly, the packing layer is completely precipitated to the lower part of the tank, and the anaerobic sludge has extremely low density, and then the packing layer can be precipitated to the bottom, so the anaerobic sludge can be precipitated on the upper surface of the packing layer, the sludge concentration is improved, and the starting period of the intermittent expansion anaerobic biofilter is further accelerated.
The gas separated in the three-phase separator includes biogas generated by fermentation of sludge, and thus the gas discharged from the gas outlet is collected by a collection tank for safety.
Compared with the prior art, the utility model discloses following beneficial effect has:
the intermittent expansion anaerobic biological filter is internally designed into a liquid distribution area, a filler expansion area, a three-phase separation area and a clear water area, and sewage is uniformly distributed into a filler layer of the filler area through a water inlet and distributor in the liquid distribution area; impurities in the sewage are controlled to pass through three states of a filler standing state, a filler expansion state and a filler re-precipitation state of the filler in the filler area and the filler expansion area through the running state of the circulating water pump to realize the filtration of the impurities; then three-phase separation is carried out by a three-phase separator in the three-phase separation area, so as to achieve the purpose of accelerating the starting period of the intermittent expansion anaerobic biological filter.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic structural view of a middle spiral type circulation water distributor of the present invention;
FIG. 3 is a schematic view of the packing in a stationary state during operation of the present invention;
FIG. 4 is a schematic view of the packing in an expanded state during operation of the present invention;
fig. 5 is a schematic diagram of the filler re-precipitation state during operation of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments:
reference numerals in the drawings of the specification include: the device comprises a reactor tank body 1, a liquid distribution zone 2, a packing zone 3, a packing expansion zone 4, a three-phase separation zone 5, a clear water zone 6, a liquid outlet 7, an exhaust port 8, a water inlet distributor 9, a three-phase separator 10, a circulating water pump 11, a spiral circulating water distributor 12, a water inlet main pipe 121, a central water distribution chamber 122, an annular fixing piece 123, a water distribution long pipe 124, a water distribution short pipe 125, a liquid inlet regulating valve 13, a circulating liquid inlet valve 14, a circulating liquid outlet valve 15, a sludge discharge regulating valve 16, a PH online detector 17 and an ORP online detector 18.
Examples
Referring to fig. 1 to 5: an intermittent expansion anaerobic biofilter comprises a reactor tank body 1, wherein a liquid distribution area 2, a filler area 3, a filler expansion area 4, a three-phase separation area 5 and a clear water area 6 are sequentially arranged in the reactor tank body 1 from bottom to top; a liquid inlet is formed in the side wall of the lower side of the reactor tank body 1, a liquid outlet 7 is formed in the side wall of the upper side of the reactor tank body 1, and an exhaust port 8 is formed in the top wall of the reactor tank body 1; the liquid distribution area 2 is internally provided with at least one water inlet distributor 9 communicated with the liquid inlet, the filler area 3 is internally filled with a filler layer, the three-phase separation area 5 is internally provided with a three-phase separator 10, and the liquid outlet 7 is communicated with the clear water area 6; a circulating water pump 11 is arranged outside the reactor tank body 1, at least one spiral circulating water distributor 12 is also arranged in the liquid distribution area 2, a liquid inlet of the circulating water pump 11 is communicated with the filler expansion area 4 through a first connecting pipe, a liquid outlet 7 of the circulating water pump 11 is communicated with a second connecting pipe, and the second connecting pipe is communicated with each spiral circulating water distributor 12; when the water inlet distributor 9 and the spiral circulating distributor 12 are at least two, the water inlet distributor and the spiral circulating distributor are arranged in the liquid distribution area 2 in a staggered mode, and the spiral circulating distributor 12 is fixedly arranged below the water inlet distributor 9; the water inlet distributor 9 and the spiral circulating distributor 12 are conveniently and reasonably arranged, so that water discharged by the water inlet distributor 9 or the spiral circulating distributor 12 is uniformly distributed in the packing layer.
In order to make the water discharged by the spiral circulation water distributor 12 move in a rotating or turbulent ascending manner, the adopted spiral circulation water distributor 12 comprises a water inlet main pipe 121 communicated with the second connecting pipe, a central water distribution chamber 122 communicated with the water inlet main pipe 121 and an annular fixing piece 123, the central water distribution chamber 122 in the embodiment is circular, a plurality of water distribution long pipes 124 communicated with the central water distribution chamber are uniformly distributed on the outer side of the central water distribution chamber 122 along the circumferential direction of the central water distribution chamber, a water distribution short pipe 125 communicated with the central water distribution chamber 122 is arranged between every two adjacent water distribution long pipes 124, and each water distribution long pipe 124 is fixedly connected with the water distribution short pipe 125 through the annular fixing piece 123; in this embodiment, the long water distribution pipes 124 and the short water distribution pipes 125 are both arc pipes, and the design of the spiral circulation water distributor 12 is favorable for the discharged water to uniformly enter the packing layer; the adopted packing layer is formed by stacking a plurality of particle type packing materials, the packing materials can be particles such as volcanic rock, ceramsite, coke, activated carbon and the like, the packing materials have larger specific surface area and can adsorb organic matters, and suspended matters and organic matters can be intercepted among the particles; in order to ensure that the filler can swell, the water flow strength of the circulating water pump 11 cannot be low, and should be about 10L (5-12Lm2.s) per square meter per second. The running time of the circulating pump is short, only 1-3 minutes is needed, and the power consumption is very small.
In order to improve the automation degree of the intermittent expansion anaerobic biological filter, the intermittent expansion anaerobic biological filter also comprises a control system, and the control system comprises a PLC controller for controlling the running state of the circulating water pump 11; a liquid inlet pipe positioned outside the reactor tank body 1 is communicated with the liquid inlet, a liquid inlet regulating valve 13 is arranged on the liquid inlet pipe, a sludge discharge pipe is communicated with the second connecting pipe, a filter screen is arranged at the liquid inlet of the first connecting pipe, a circulating liquid inlet valve 14 is arranged on the first connecting pipe, a circulating liquid outlet valve 15 positioned between the sludge discharge pipe and the spiral circulating water distributor 12 is arranged on the second connecting pipe, and a sludge discharge regulating valve 16 is arranged on the sludge discharge pipe; the opening and closing states of the liquid inlet regulating valve 13, the circulating liquid inlet valve 14, the circulating liquid outlet valve 15 and the sludge discharge regulating valve 16 are controlled by a PLC (programmable logic controller); the three-phase separation zone 5 is provided with a PH online detector 17 and an ORP online detector 18 which are arranged on the outer wall of the reactor tank body 1, and the PH online detector 17 and the ORP online detector 18 are both in communication connection with the PLC; the PLC controller may be SUK2N-1412MR/MT model, the PH on-line detector 17 may be BPH model, and the ORP on-line detector 18 may be BRP-200A model.
The intermittent expansion anaerobic biofilter can be additionally provided with interfaces with other functions, such as an inlet and an outlet of a packing layer, a manhole, a sampling port, an observation mirror and the like.
During the use, come intercommunication feed liquor governing valve 13 through the PLC controller, with the leading-in water distributor 9 of sewage in, sewage is by the even leading-in filler district 3 of water distributor 9, and impurity in the sewage is in filler district 3 and filler expansion region 4 and realize the filtration of impurity through the three state of filler, and three state is respectively: the filler standing state, the filler expansion state and the filler re-precipitation state are realized, in the process of entering the filler standing state, a PLC (programmable logic controller) is used for communicating a circulating liquid inlet valve 14 and a circulating liquid outlet valve 15, then a circulating water pump 11 is started, water in a filler expansion area 4 and the upper side of the filler expansion area is pumped into a first connecting pipe, the water enters the circulating water pump 11 after being filtered by a filter screen and then enters a water inlet main pipe 121 in a spiral circulating water distributor 12 from a second connecting pipe, and then is sprayed out of a water distribution short pipe 125 and a water distribution long pipe 124 through a central water distribution chamber 122, so that the filler enters the filler expansion state; when the filler is in a filler expansion state and reaches a complete floating state, the circulating water pump 11 stops running, sludge stays in the filler region 3 and the filler expansion region 4, a small amount of impurities enter the three-phase separation region 5 along with filtered water, and are separated by the three-phase separator 10; the design of the sludge discharge pipe and the sludge discharge regulating valve 16 is convenient for the maintenance to discharge sludge to the intermittent expansion anaerobic biological filter, and the PH on-line detector 17 and the ORP on-line detector 18 are convenient for detecting corresponding parameters in real time.
The intermittent expansion anaerobic biological filter, a commonly used USAB reactor, an EGSB anaerobic reactor and an IC anaerobic reactor are used for treating sewage, and the data in the following table are obtained:
the following results are obtained by analysis in the table and the actual detection process: the intermittent expansion anaerobic biofilter has the following advantages:
1) the starting period is short, and the effect of the IC reactor in the mature period after one year can be achieved in less than two months;
2) the possibility of the occurrence of the sludge leakage fault of the IC reactor can lead to the restart, but the intermittent expansion anaerobic biological filter only leaks scattered sludge when the sludge leakage fault occurs, and the filler layer can never leak;
3) both IC and EGSB reactors require a large height to diameter ratio or effluent recirculation to increase the upflow velocity in the reactor to form a fluidized bed, resulting in increased power consumption, increased pumping head, and increased manufacturing and construction costs. The height-diameter ratio of the intermittent expansion anaerobic biological filter is mainly considered to be the optimal of the floor area, the retention time, the height of the filter layer, the height of the expansion layer and the height of the clear water area, the sludge layer can be concentrated and stay at the optimal position without a fluidized bed state because the backflow is avoided after the water is discharged and the expansion phenomenon and the secondary sedimentation phenomenon of the filter layer exist;
4) the IC is provided with a two-layer three-phase separator, so that the height-diameter ratio is increased, and the intermittent expansion anaerobic biological filter does not need a second-layer three-phase separator but only needs one three-phase separator;
5) the intermittent expansion anaerobic biofilter has the advantages that the function of filtering and retaining sludge by the filler layer and the short-time circulation enable the filler layer to expand and separate most of loose sludge in the filler so as to realize sludge concentration;
6) the method has the advantages of high sludge concentration, high organic matter removing efficiency, low manufacturing cost, low operation cost, long service life, simple operation program, high automation degree, high stability and high popularization, and can possibly become a main process of a sewage treatment process.
The start period of the intermittent expansion anaerobic biological filter is less than 30 days, effective anaerobic reaction is started after the intermittent expansion anaerobic biological filter is used for 7 days, the sludge concentration reaches more than 30000mg/L when the intermittent expansion anaerobic biological filter is operated for about 20 days, the system enters a better stage, the sludge concentration continues to increase, granular sludge appears, the sludge concentration reaches about 80000mg/L after 2 months, importantly, filler granules are taken as cores, enriched activated sludge becomes large like snowballing balls, the phenomenon is excellent, the F/M value enters an optimal state, and the total sludge amount is maximized. The original filler is changed into an inner core, and the outer layer is changed into an activated sludge layer; the oversize particles can be crushed under multiple times of expansion impact, and the change of one to two and two to four is realized. The whole sludge layer grows up along with the change of cycle time, the total height of the filler layer and the granular sludge layer plus the expansion space cannot touch the three-phase separator, and granular sludge should be discharged in time to control the growth of the sludge layer.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (7)
1. The intermittent expansion anaerobic biofilter is characterized by comprising a reactor tank body, wherein a liquid distribution area, a filler expansion area, a three-phase separation area and a clear water area are sequentially arranged in the reactor tank body from bottom to top; a liquid inlet is formed in the side wall of the lower side of the reactor tank body, a liquid outlet is formed in the side wall of the upper side of the reactor tank body, and an exhaust port is formed in the top wall of the reactor tank body;
the liquid distribution area is at least provided with a water inlet distributor communicated with the liquid inlet, the filler area is filled with a filler layer, the three-phase separation area is internally provided with a three-phase separator, and the liquid outlet is communicated with the clear water area;
a circulating water pump is arranged outside the reactor tank body, at least one spiral circulating water distributor is further arranged in the liquid distribution area, a liquid inlet of the circulating water pump is communicated with the filler expansion area through a first connecting pipe, a liquid outlet of the circulating water pump is communicated with a second connecting pipe, and the second connecting pipe is communicated with each spiral circulating water distributor.
2. The intermittently expanding anaerobic biological filter according to claim 1, wherein: when the water inlet distributor and the spiral circulating water distributor are at least two, the water inlet distributor and the spiral circulating water distributor are arranged in the liquid distribution area in a staggered mode and are fixedly arranged below the water inlet distributor.
3. The intermittently expanding anaerobic biological filter according to claim 1 or 2, wherein: the spiral circulation water distributor comprises a water inlet main pipe communicated with the second connecting pipe and a central water distribution chamber communicated with the water inlet main pipe, a plurality of water distribution long pipes communicated with the central water distribution chamber are uniformly distributed on the outer side of the central water distribution chamber along the circumferential direction of the central water distribution chamber, and a water distribution short pipe communicated with the central water distribution chamber is arranged between every two adjacent water distribution long pipes.
4. The intermittently expanding anaerobic biological filter according to claim 3, wherein: the spiral circulation water distributor also comprises an annular fixing piece which fixedly connects each long water distribution pipe and each short water distribution pipe.
5. The intermittently expanding anaerobic biological filter according to claim 1, 2 or 4, wherein: the control system comprises a PLC controller used for controlling the running state of the circulating water pump; a liquid inlet pipe positioned outside the reactor body is communicated with the liquid inlet, a liquid inlet regulating valve is arranged on the liquid inlet pipe, a sludge discharge pipe is communicated with the second connecting pipe, a filter screen is arranged at the liquid inlet of the first connecting pipe, a circulating liquid inlet valve is arranged on the first connecting pipe, a circulating liquid outlet valve positioned between the sludge discharge pipe and the spiral circulating water distributor is arranged on the second connecting pipe, and a sludge discharge regulating valve is arranged on the sludge discharge pipe; the liquid inlet regulating valve, the circulating liquid inlet valve, the circulating liquid outlet valve and the sludge discharge regulating valve are controlled by the PLC to be in an open-close state.
6. The intermittently expanding anaerobic biological filter according to claim 5, wherein: the three-phase separation zone is provided with a PH on-line detector and an ORP on-line detector which are arranged on the outer wall of the reactor body, and the PH on-line detector and the ORP on-line detector are in communication connection with the PLC.
7. The intermittently expanding anaerobic biological filter according to claim 1, wherein: the filler layer is formed by stacking a plurality of granular fillers.
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| CN201920530417.7U CN209872512U (en) | 2019-04-18 | 2019-04-18 | Intermittent expansion anaerobic biological filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113402113A (en) * | 2021-06-07 | 2021-09-17 | 安徽泓济环境科技有限公司 | Complete set of anaerobic hydrolysis biological reaction device for treating wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113402113A (en) * | 2021-06-07 | 2021-09-17 | 安徽泓济环境科技有限公司 | Complete set of anaerobic hydrolysis biological reaction device for treating wastewater |
| CN113402113B (en) * | 2021-06-07 | 2022-12-09 | 安徽泓济环境科技有限公司 | Complete set of anaerobic hydrolysis biological reaction device for treating wastewater |
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Granted publication date: 20191231 |