CN215712423U - Treatment system and operation process for middle and small-scale areca nut production wastewater - Google Patents
Treatment system and operation process for middle and small-scale areca nut production wastewater Download PDFInfo
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- CN215712423U CN215712423U CN202120299899.7U CN202120299899U CN215712423U CN 215712423 U CN215712423 U CN 215712423U CN 202120299899 U CN202120299899 U CN 202120299899U CN 215712423 U CN215712423 U CN 215712423U
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Abstract
The utility model discloses a treatment system and an operation process for middle and small-scale areca nut production wastewater, which comprise a coarse and fine grid, an adjusting tank, a Fenton reactor for improving the biodegradability of wastewater, a pH adjusting tank for adjusting pH, a coagulating sedimentation tank for carrying out coagulating sedimentation, an ABR tank for carrying out anaerobic reaction to remove COD, a sedimentation tank for removing residual sludge and an SBR tank for carrying out aerobic reaction to remove pollutants. The discharge port of the discharge pool is connected with a municipal pipe network, the water quantity in the discharge pool enters and exits, the medicament is added, and the equipment action and the instrument sensing detection are uniformly coordinated through a control system. Each reaction tank is arranged according to elevation communication in sequence except the parts pumped in by the pump. The utility model purifies the wastewater from the production of small and medium-scale areca nuts by the steps of homogenization, oxidation, sedimentation, anaerobic treatment, aerobic treatment and the like, so that the wastewater can stably reach the corresponding discharge standard of Integrated wastewater discharge Standard GB8978-1996, and the utility model has the advantages of simple process, high automation degree, standard treatment and lower operation cost.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a treatment system and an operation process for middle and small-scale areca nut production wastewater.
Background
Some wastewater is generated in the production of the betel nuts, the amount of the wastewater is less, however, in the prior art, the treatment is mostly performed on large-scale and high-concentration production wastewater, the process is complex, the automatic control requirement is high, the investment is large, and a method for treating the medium-low-concentration production wastewater for small and medium-sized betel nut processing enterprises is lacked.
The existing areca nut production wastewater treatment methods are more, but all have some defects, such as
The utility model provides a method for treating areca nut wastewater (CN 107043195A), this utility model provides a method for treating areca nut wastewater, includes the following steps: the first step is as follows: deslagging; the second step is that: performing biochemical treatment for the first time to obtain a first mixed solution; the third step: carrying out primary precipitation treatment on the first mixed solution to obtain first sludge and first precipitation liquid; the fourth step: carrying out secondary biochemical treatment on the first precipitation solution to obtain a second mixed solution; the fifth step: carrying out secondary sedimentation treatment on the second mixed solution to obtain second sludge and second sedimentation solution; and a sixth step: and carrying out subsequent treatment on the second precipitation solution. The method combines slag removal treatment and two-stage biochemical treatment to realize treatment of areca nut wastewater, changes the thought of the prior art, omits the pretreatment step, has a treatment effect not lower than that of the treatment mode of the prior art, greatly simplifies the process steps, avoids adding a large amount of treatment reagents, improves the stability of the system, reduces the sludge yield in the sewage treatment process, and saves the treatment cost. The treatment process mainly has the following defects: firstly, a buffering and collecting adjusting tank is not arranged, so that the betel nut wastewater is mostly in a high-temperature physical state and is not suitable for biochemical treatment without any pretreatment and temperature reduction measures; secondly, the characteristic of low biodegradability of most betel nut wastewater is not fully considered. Most of the betel nut wastewater shows low biodegradability, and the subsequent biochemical treatment can be carried out only by carrying out biodegradability improving treatment on the betel nut wastewater; and thirdly, the areca nut wastewater is treated only by means of biochemical treatment and natural precipitation, the treatment technology is single, and the effluent effect is difficult to reach the standard. Therefore, the method is difficult to meet the discharge standard of the effluent of the areca nut wastewater.
A treatment method (CN201610174817. X) for Arecae semen soaking and cooking wastewater, the utility model discloses a treatment method for Arecae semen soaking and cooking wastewater, which comprises removing impurities from wastewater, and pretreating with FCM-III iron-carbon micro-electrolysis technology; carrying out slag-liquid separation by utilizing aeration oxidation, flocculation and air flotation technologies after micro-electrolysis; then, the subsequent treatment is carried out on the wastewater by adopting the process of UASB + MBBR + anoxic + aerobic. The treatment process mainly has the following defects: firstly, the iron-carbon micro-electrolysis filler is easy to harden in the reaction process, the operation cost is increased, the treatment efficiency is influenced, the iron-carbon filler is easy to cover sediment, back washing is required to be carried out in time, and the automatic control difficulty is increased; secondly, in the treatment of ferrous ions, the ferrous ions generated after micro-electrolysis are difficult to be quickly oxidized into ferric ions by aeration oxidation alone so as to be precipitated, and secondary pollution is easy to cause. The whole process of the method is complex, the construction occupied area is large, the method does not accord with the construction idea of small and medium-sized factories, and the implementation difficulty is large. Therefore, the method has the limitations, is only suitable for large-scale organic wastewater treatment, and has high operation difficulty and extremely high automatic control requirement.
Disclosure of Invention
The utility model aims to provide a treatment system and an operation process for middle and small-scale areca nut production wastewater, so as to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: a treatment system and an operation process for middle and small-scale areca nut production wastewater comprise: the system comprises a coarse and fine grid, an adjusting tank, a Fenton reactor for improving the biodegradability of wastewater, a pH adjusting tank for adjusting pH, a coagulating sedimentation tank for performing coagulating sedimentation, an ABR tank for performing anaerobic reaction to remove COD, a sedimentation tank for removing excess sludge, an SBR tank for performing aerobic reaction to remove pollutants and an external drainage tank, wherein the coarse and fine grid, the adjusting tank, the Fenton reactor, the pH adjusting tank, the coagulating sedimentation tank, the ABR tank, the sedimentation tank, the SBR tank and the external drainage tank are sequentially arranged in a height-dependent manner through a pipeline from high to low except for a part needing to be pumped by a lifting liquid pump, a drainage port of the external drainage tank is connected with a municipal pipe network, the Fenton reactor, the pH adjusting tank, the coagulating sedimentation tank, the ABR tank and an instrument device in the SBR tank are respectively and electrically connected with a control system, wherein the water feeding amount, the chemical adding amount, the equipment action and the induction detection of instruments are all unified and coordinated through the control system, the lower precipitation part of the coagulating sedimentation tank, the ABR tank and the sedimentation tank is connected with a sludge concentration tank through a pipeline, the sludge concentration tank is connected with a plate-and-frame filter press through a pipeline, and sludge is lifted to the plate-and-frame filter press through a diaphragm pump.
An operation flow of a treatment system for middle and small-scale areca nut production wastewater comprises the following specific steps:
firstly, filtering raw water of betel nut wastewater by a coarse and fine grating net to remove large-particle betel nut residues, wherein the gap between the coarse grating net and the fine grating net is between 20 and 30mm, and the gap between the fine grating net and the coarse grating net is between 3 and 10 mm;
secondly, the wastewater automatically flows into an adjusting tank from a coarse-fine grid, the water quality and the water quantity are adjusted, and the temperature of the wastewater is reduced;
thirdly, pumping the wastewater from the regulating reservoir into a Fenton reactor by using a pump, wherein the Fenton reactor can degrade refractory organic matters into degradable organic matters, and the B/C ratio of the wastewater is improved; the Fenton reactor is divided into two grids, the first grid is an acid regulating iron feeding pool, and FeSO is fed into the grid4And sulfuric acid, reducing the pH of the wastewater from 5-7 to 3-4, installing a stirrer for uniformly stirring, and allowing the reaction to stay for 10-15min, wherein the sulfuric acid is 10% dilute sulfuric acid, FeSO4The concentration is 20%; the second grid is a Fenton reaction tank, 30% hydrogen peroxide solution is added, a stirrer is arranged to fully stir the water entering the first grid, the reaction retention time is 0.8-1h, and the first grid and the second grid are sealed by partition wallsClosing the partition walls, and connecting the partition walls through perforated tracery walls at the bottoms of the partition walls;
fourthly, the wastewater automatically flows to a pH adjusting tank from the Fenton reactor, and 20 percent NaOH solution is added to ensure that the pH value in the adjusting tank is 7.5-8.5 and the retention time is 1-1.5 h;
fifthly, pumping the wastewater from the pH adjusting tank into a coagulating sedimentation tank by a pump, wherein the coagulating sedimentation tank is divided into three grids, the first grid is a coagulating tank, the second grid is a flocculation tank, a 15% concentration PAC (polyaluminium chloride) solution and a 0.01% concentration PAM (polyacrylamide) solution are respectively added, the retention time is 15-20min, the third grid is a vertical flow type sedimentation tank, the effluent after flocculation is precipitated, and the hydraulic retention time is 1.5-2.5 h; the first grid and the second grid are sealed by partition walls and are connected through perforated tracery walls at the bottoms of the partition walls; discharging residual sludge from the third vertical sedimentation tank to remove suspended matters (SS);
sixthly, the wastewater automatically flows into an ABR tank from the vertical flow sedimentation tank, part of COD is removed through ABR anaerobic reaction, the concentration of anaerobic treatment pollutants is greatly reduced, and sludge at the tail end of the ABR tank flows back to the front end to improve the concentration of the sludge;
the seventh step, the wastewater automatically flows into the SBR tank from the ABR tank, the SBR tank is divided into a pre-reaction zone and a reaction zone, the wastewater automatically flows into the front end of the pre-reaction zone and then enters the main reaction zone through a pump for reaction, and ammonia nitrogen, COD and BOD are removed5And the like. The effluent is discharged to an external discharge tank and reaches the standard, and 1-2 SBR tanks can be reasonably arranged according to the scale of the wastewater;
and eighthly, discharging residual sludge to a sludge concentration tank through a coagulation sedimentation tank, a sedimentation tank and an ABR tank, concentrating and precipitating sludge in the sludge concentration tank, lifting the sludge to a plate-and-frame filter press through a diaphragm pump for treatment, returning filter liquor to an adjusting tank, transporting the sludge outside after filter pressing, and manually controlling a sludge filter pressing system through an electric control cabinet.
Furthermore, the quality of the wastewater inlet water is as follows: the pH value is required to be 5.8-8.8, and the COD is required to be 8000-13000 mg/L; BOD5The requirement is more than or equal to 1500 mg/L; SS requirement is less than or equal to 3500 mg/L; the requirement of ammonia nitrogen is less than or equal to 130 mg/L.
The utility model purifies the wastewater from the production of small and medium-scale areca nuts by the steps of homogenization, oxidation, sedimentation, anaerobic treatment, aerobic treatment and the like, so that the wastewater can stably reach the corresponding discharge standard of Integrated wastewater discharge Standard GB8978-1996, and the utility model has the advantages of simple process, high automation degree, standard treatment and lower operation cost.
Compared with the prior art, the utility model has the advantages that:
the utility model discloses a set up the grid pond and carry out the interception effect to the sesame oil sediment, get rid of the big granule sesame oil sediment in the waste water, set up the equalizing basin and collect high temperature sesame oil waste water, cool down through the natural cooling effect, do benefit to follow-up biochemical reaction, through throwing acidity adjusting medicament, ferrous sulfate and hydrogen peroxide solution back to the sesame oil waste water, form fenton's reaction, H2O2 can decompose and produce hydroxyl radical OH-under the catalytic action of Fe2+ ion, hydroxyl radical OH-has higher oxidation electrode potential, has very strong oxidation performance, can change the organic matter of difficult degradation in the waste water into degradable organic matter, improve waste water biodegradability.
By adding alkalinity adjusting agent, ferrous sulfate generated by Fenton reaction generates coagulant ferric hydroxide, so that secondary pollution of ferrous is avoided, and flocculating agent is added subsequently to generate coagulation flocculation precipitation, so as to remove suspended matters and partial COD in the wastewater.
Then, COD and BOD5 in the wastewater are deeply removed by an anaerobic reactor ABR + aerobic SBR process, the ABR reactor has strong biological solid interception capability and good hydraulic mixing condition, the reactor is divided into a plurality of reaction chambers which are connected in series, each reaction chamber can be regarded as a relatively independent upflow sludge bed system, the treated wastewater flows up and down along a baffle plate in the reactor and sequentially passes through the sludge bed of each reaction chamber, organic substrates in the wastewater are removed by contacting with microorganisms, the SBR biochemical tank adopts a time division operation mode to replace a space division operation mode, an unstable biochemical reaction replaces a stable biochemical reaction, and the tank integrates the functions of homogenization, primary sedimentation, biodegradation, sedimentation and the like into one tank, has no sludge backflow system, and greatly saves the occupied space.
The 'Fenton reaction + ABR + SBR' process combination enhances the biodegradability by regulating the middle and small-scale low-biodegradability areca-nut wastewater, reduces the maintenance difficulty by using a Fenton reactor for treatment, greatly reduces the construction floor area, the whole operation difficulty and the initial investment cost by using the anaerobic and aerobic combined treatment process of ABR + SBR, is jointed with the construction concept of middle and small-scale areca-nut wastewater treatment, and has good water quality treatment effect and high automatic control technology.
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FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1, the present invention provides a treatment system and an operation process for betel nut production wastewater of small and medium size, comprising: the device comprises a coarse and fine grid, an adjusting tank, a Fenton reactor for improving the biodegradability of wastewater, a pH adjusting tank for adjusting pH, a coagulating sedimentation tank for performing coagulating sedimentation, an ABR tank for performing anaerobic reaction to remove COD, a sedimentation tank for removing residual sludge, an SBR tank for performing aerobic reaction to remove pollutants, and an external drainage tank, wherein the coarse and fine grid, the adjusting tank, the Fenton reactor, the pH adjusting tank, the coagulating sedimentation tank, the ABR tank, the sedimentation tank, the SBR tank and an external drainage tank are sequentially arranged through communication according to an elevation pipeline from high to low except parts needing to be pumped by a lifting liquid pump, the internal connection mode of each unit is described in specific steps, a drainage port of the external drainage tank is connected with a municipal pipe network, instrument equipment in the Fenton reactor, the pH adjusting tank, the coagulating sedimentation tank, the ABR tank and the SBR tank are respectively and electrically connected with a control system, and the water inlet and outlet amount is increased, the adding amount of the medicament, the action of the equipment and the induction detection of the instrument are uniformly coordinated through a control system, the lower precipitation parts of the coagulation sedimentation tank precipitation unit, the ABR tank and the sedimentation tank are connected with a sludge concentration tank through pipelines, and the sludge concentration tank is connected with a plate-and-frame filter press through a pipeline.
An operation flow of a treatment system for middle and small-scale areca nut production wastewater comprises the following specific steps:
firstly, filtering raw water of betel nut wastewater by a coarse and fine grating net to remove large-particle betel nut residues, wherein the gap between the coarse grating net and the fine grating net is between 20 and 30mm, and the gap between the fine grating net and the coarse grating net is between 3 and 10 mm;
secondly, the wastewater automatically flows into an adjusting tank from a coarse-fine grid, the water quality and the water quantity are adjusted, and the temperature of the wastewater is reduced;
thirdly, pumping the wastewater from the regulating reservoir into a Fenton reactor by using a pump, wherein the Fenton reactor can degrade refractory organic matters into degradable organic matters, and the B/C ratio of the wastewater is improved; the Fenton reactor is divided into two grids, the first grid is an acid regulating iron feeding pool, and FeSO is fed into the grid4And sulfuric acid, reducing the pH of the wastewater from 5-7 to 3-4, installing a stirrer for uniformly stirring, and allowing the reaction to stay for 10-15min, wherein the sulfuric acid is 10% dilute sulfuric acid, FeSO4The concentration is 20%; the second grid is a Fenton reaction tank, 30% hydrogen peroxide solution is added, a stirrer is installed to fully stir the water entering the first grid, the reaction retention time is 0.8-1h, the first grid and the second grid are sealed by partition walls, and the first grid and the second grid are connected through perforated tracery walls at the bottoms of the partition walls;
fourthly, the wastewater automatically flows to a pH adjusting tank from the Fenton reactor, and 20 percent NaOH solution is added to ensure that the pH value in the adjusting tank is 7.5-8.5 and the retention time is 1-1.5 h;
fifthly, pumping the wastewater from the pH adjusting tank into a coagulating sedimentation tank by a pump, wherein the coagulating sedimentation tank is divided into three grids, the first grid is a coagulating tank, the second grid is a flocculation tank, a 15% concentration PAC (polyaluminium chloride) solution and a 0.01% concentration PAM (polyacrylamide) solution are respectively added, the retention time is 15-20min, the third grid is a vertical flow type sedimentation tank, the effluent after flocculation is precipitated, and the hydraulic retention time is 1.5-2.5 h; the first grid and the second grid are sealed by partition walls and are connected through perforated tracery walls at the bottoms of the partition walls; discharging residual sludge from the third vertical sedimentation tank to remove suspended matters (SS);
sixthly, the wastewater automatically flows into an ABR tank from the vertical flow sedimentation tank, part of COD is removed through ABR anaerobic reaction, the concentration of anaerobic treatment pollutants is greatly reduced, and sludge at the tail end of the ABR tank flows back to the front end to improve the concentration of the sludge;
the seventh step, the wastewater automatically flows into the SBR tank from the ABR tank, the SBR tank is divided into a pre-reaction zone and a reaction zone, the wastewater automatically flows into the front end of the pre-reaction zone and then enters the main reaction zone through a pump for reaction, and ammonia nitrogen, COD and BOD are removed5And the like. The effluent is discharged to an external discharge tank and reaches the standard, and 1-2 SBR tanks can be reasonably arranged according to the scale of the wastewater;
and eighthly, discharging residual sludge to a sludge concentration tank through a coagulating sedimentation tank, a sedimentation tank and an ABR tank, after the sludge in the sludge concentration tank is concentrated and precipitated, discharging the sludge into a plate-and-frame filter press through a diaphragm pump for treatment, returning the filter pressing liquid to an adjusting tank, transporting the sludge outside after filter pressing, and manually controlling a sludge filter pressing system.
Furthermore, the quality of the wastewater inlet water is as follows: the pH value is required to be 5.8-8.8, and the COD is required to be 8000-13000 mg/L; BOD5The requirement is more than or equal to 1500 mg/L; SS requirement is less than or equal to 3500 mg/L; the requirement of ammonia nitrogen is less than or equal to 130 mg/L.
The control system is used for controlling the dosing of each unit and the starting and stopping of the water pump by adopting an automatic control system;
the method comprises the following specific steps: the method comprises the following steps that when a liquid level meter arranged in a regulating tank reaches a pump stop liquid level, a regulating tank lift pump is closed, when a first grid of a Fenton reactor reaches a warning/pump stop liquid level of the liquid level meter, the regulating tank lift pump is opened/closed, the dosing of ferrous sulfate by a medicament pump is started/suspended synchronously, and the dosing of sulfuric acid by the medicament pump is controlled according to the warning/pump stop liquid level of a pH meter; and the second Griffinton reaction tank controls a medicament pump to start/pause adding hydrogen peroxide according to the alarm/stop liquid level of the liquid level meter.
The pH adjusting tank is provided with a liquid level meter, and the lifting pump of the pH adjusting tank is closed when the liquid level meter reaches the liquid level of the pump stopping, and the warning/pump stopping liquid level of the pH meter is set to control the agent pump to feed NaOH solution; and when the coagulation tank reaches the warning/stopping liquid level of the liquid level meter, starting/closing a pH tank lifting pump, synchronously starting/suspending the medicament pump to feed PAC, and controlling the medicament pump to feed PAM according to the warning/stopping liquid level of the flocculation tank liquid level meter.
The ABR pond sludge reflux pump is controlled by a control system, the ABR sludge discharge pump is manually opened and closed, the SBR pond aeration system, the sewage lifting pump are controlled by the control system, equipment is opened and closed according to different periodic states of the SBR pond, when the SBR pond is in a water inlet period, the SBR lifting pump is opened, sewage in the pre-reaction region is pumped into the reaction region, the SBR lifting pump is closed in other time, when the SBR pond is in the reaction period, the aeration system is opened, the aeration system is closed in other periods, and the SBR sludge discharge pump is manually opened and closed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A treatment system for wastewater from betel nut production in small and medium scale is characterized by comprising: the system comprises a coarse and fine grid, an adjusting tank, a Fenton reactor for improving the biodegradability of wastewater, a pH adjusting tank for adjusting pH, a coagulating sedimentation tank for performing coagulating sedimentation, an ABR tank for performing anaerobic reaction to remove COD, a sedimentation tank for removing excess sludge, an SBR tank for performing aerobic reaction to remove pollutants and an external drainage tank, wherein the coarse and fine grid, the adjusting tank, the Fenton reactor, the pH adjusting tank, the coagulating sedimentation tank, the ABR tank, the sedimentation tank, the SBR tank and the external drainage tank are sequentially arranged in a height-dependent manner through a pipeline from high to low except for a part needing to be pumped by a lifting liquid pump, a drainage port of the external drainage tank is connected with a municipal pipe network, the Fenton reactor, the pH adjusting tank, the coagulating sedimentation tank, the ABR tank and an instrument device in the SBR tank are respectively and electrically connected with a control system, wherein the water feeding amount, the chemical adding amount, the equipment action and the induction detection of instruments are all unified and coordinated through the control system, the lower sedimentation parts of the coagulating sedimentation tank, the ABR tank and the sedimentation tank are connected with a sludge concentration tank through pipelines, and the sludge concentration tank is connected with a plate-and-frame filter press through a pipeline.
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| CN112645549A (en) * | 2021-02-03 | 2021-04-13 | 湖南惟创环境科技有限公司 | Treatment system and operation process for middle and small-scale areca nut production wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112645549A (en) * | 2021-02-03 | 2021-04-13 | 湖南惟创环境科技有限公司 | Treatment system and operation process for middle and small-scale areca nut production wastewater |
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Address after: 410000 room 406, building A4, Jinghuan community, 126 Xing'an Road, Yuhua District, Changsha City, Hunan Province Patentee after: Weichuang Environmental Technology Co.,Ltd. Address before: 410000 room 406, building A4, Jinghuan community, 126 Xing'an Road, Yuhua District, Changsha City, Hunan Province Patentee before: HUNAN WEICHUANG ENVIRONMENT TECHNOLOGY CO.,LTD. |
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