CN110734199A - garlic processing wastewater treatment process - Google Patents
garlic processing wastewater treatment process Download PDFInfo
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- CN110734199A CN110734199A CN201911127351.8A CN201911127351A CN110734199A CN 110734199 A CN110734199 A CN 110734199A CN 201911127351 A CN201911127351 A CN 201911127351A CN 110734199 A CN110734199 A CN 110734199A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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Abstract
The invention discloses a garlic processing wastewater treatment process which comprises a pretreatment process and a biological treatment process, wherein the pretreatment process comprises the steps of separately collecting garlic slice cleaning wastewater and combining and collecting other processing wastewater, collecting the garlic slice cleaning wastewater in a water collecting tank, collecting the other processing wastewater in a water collecting tank, respectively pumping the garlic slice cleaning wastewater and the other processing wastewater into respective micro-filters for mechanical screening, respectively entering the micro-filters into respective sedimentation tanks for gravity sedimentation after treatment, respectively entering sediments settled out of the garlic slice cleaning wastewater and sediments settled out of the other processing wastewater into respective sludge tanks, respectively collecting supernatants of the two sedimentation tanks into an adjusting tank for the biological treatment process.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a treatment process of kinds of garlic processing wastewater.
Background
At present, products processed from garlic mainly comprise garlic rice, garlic slices, garlic powder and the like, and a large amount of waste water is generated due to the fact that washing is needed in the processing process, and the waste water contains a large amount of organic pollutants, suspended matters, ammonia nitrogen and other substances; meanwhile, the garlic flakes are required to be sliced in the processing process, so that the garlic flake cleaning wastewater contains colloidal juice, namely allicin, which flows out of the garlic flakes. The strong sterilization effect of the allicin makes the wastewater treated by biochemical treatment difficult to reach the standard and discharge, so that the pretreatment is needed before the garlic water enters the biochemical treatment, namely, most of the allicin in the wastewater is removed by the method.
At present, the pretreatment of garlic wastewater is usually carried out by physicochemical methods, mainly comprising micro-electrolysis, chemical agent oxidation, coagulating sedimentation, coagulating air floatation and the like, although the methods can effectively treat most allicin, no cases require adding aluminum and iron chemicals into the wastewater, secondary pollution can be generated, the content of inorganic salts in water is increased, and the generated chemical sludge cannot be used as agricultural fertilizer or greening fertilizer, and is difficult to treat and dispose.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides kinds of garlic processing wastewater treatment processes, which comprise a pretreatment process and a biological treatment process, wherein the garlic processing wastewater is divided according to the mass in the pretreatment process, the wastewater which is discharged in the garlic slice cleaning process and is rich in allicin is separately collected, other garlic processing wastewater is combined and collected, pure physical methods such as mechanical screening, gravity precipitation and the like are respectively carried out for treatment, and finally, various kinds of pretreated wastewater are mixed in to carry out the biological treatment process so as to remove organic pollutants in the wastewater;
the pretreatment process in the application can effectively remove settleable matters and floating matters such as silt, allicin, garlic skin, garlic residues and the like in the wastewater, and the garlic flake cleaning wastewater with high allicin content is independently precipitated due to the adoption of a mass-division treatment mode, so that the removal rate of the allicin is higher than that of pretreatment after various types of processing wastewater is mixed.
In order to achieve the purpose, the invention adopts the following technical scheme:
A process for treating the waste water generated by processing garlic includes such steps as pretreating the waste water, removing organic pollutants from the waste water,
step 11: separately collecting garlic slice cleaning wastewater, and combining and collecting other processing wastewater;
step 12: collecting garlic slice cleaning wastewater in a water collecting tank; collecting other processing wastewater in a water collecting pool;
step 13: the garlic slice cleaning wastewater in the water collecting tank and other processing wastewater in the water collecting tank are respectively pumped into respective micro-filters for mechanical screening so as to remove fine suspended matters in the wastewater;
step 14: treating the garlic slice cleaning wastewater and other processing wastewater by respective microfilters, and then respectively entering respective sedimentation tanks for gravity sedimentation; the precipitate settled from the garlic flake cleaning wastewater and the precipitate settled from the other processing wastewater respectively enter respective sludge ponds;
step 15: collecting the supernatant in the two sedimentation tanks into an adjusting tank to wait for a biological treatment process.
Preferably, in the step 12, before the garlic flake cleaning wastewater enters the water collecting tank, the garlic flakes are recovered by the garlic flake recovery bag.
Preferably, in step 12, the other process wastewater is treated by a mechanical grid to remove larger suspended substances and particles from the wastewater before entering the water collecting tank.
Preferably, the biological treatment process comprises the steps of,
step 21: the wastewater after pretreatment in the regulating tank enters a UASB reactor, and organic matters are removed through anaerobic reaction;
step 22: the wastewater treated by the UASB reactor enters a membrane bioreactor, so that ammonia nitrogen and phosphorus in the wastewater are effectively removed;
step 23: the waste water treated by the membrane bioreactor enters the disinfection tank through the self-priming pump, and the waste water is discharged or recycled after the disinfection effect of the disinfection tank.
Preferably, in the step 21, the wastewater in the conditioning tank is pumped into a hydrolysis acidification tank containing hydrolysis acidification bacteria before entering the UASB reactor, so as to effectively decompose residual allicin in the wastewater.
Preferably, in step 22, the wastewater is treated in a membrane bioreactor with a2The process is carried out by adopting a/O technology.
Preferably, in step 23, chlorine dioxide generated by the chlorine dioxide generator is introduced into the disinfection tank to perform a disinfection function.
The invention has the beneficial effects that:
(1) according to the garlic processing wastewater treatment process, garlic processing wastewater is divided according to the quality, so that the removal rate of allicin can be improved, and the biological treatment of the wastewater is facilitated;
(2) the garlic processing wastewater treatment process only carries out pure physical separation of mechanical screening and gravity sedimentation on the garlic processing wastewater, does not add aluminum and iron medicaments, and reduces the operation cost;
(3) in the whole process of the garlic processing wastewater treatment process, no medicament is added, so that liquid medicine does not need to be prepared, and the labor intensity is low;
(4) according to the garlic processing wastewater treatment process, the wastewater in the regulating tank is pumped into the hydrolysis acidification tank containing hydrolysis acidification bacteria before entering the UASB reactor, the hydrolysis acidification bacteria in the hydrolysis acidification tank can effectively decompose residual allicin in the wastewater, the adverse effect of allicin oil on methanogens in the UASB reactor is eliminated, and the removal rate of organic matters by the UASB reactor is improved;
(5) the garlic processing wastewater treatment process has the advantages of high anaerobic treatment efficiency, low power consumption and low operating cost because no medicament is added.
(6) According to the garlic processing wastewater treatment process, as chemical agents such as aluminum, iron and the like are not added in the whole treatment process, chemical sludge with high water content and difficult dehydration is not generated; the sludge produced by the treatment process is soil carried by garlic in the pretreatment process, harmless substances such as garlic residues and garlic skins produced in the garlic processing process and various biological sludge produced in the biological treatment process, is easy to dehydrate, is rich in nitrogen and phosphorus, can be used as an agricultural fertilizer or a greening fertilizer, does not produce secondary pollution, does not cause harm to crops, and solves the problem that the sludge produced by the conventional treatment process is difficult to treat and dispose.
Drawings
The accompanying drawings, which form a part hereof , are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the application and together with the description serve to explain the application and not limit the application.
FIG. 1 is a schematic flow chart of a pretreatment process in the garlic processing wastewater treatment process of the present invention;
FIG. 2 is a schematic flow chart of a biological treatment process in the garlic processing wastewater treatment process according to the present invention;
Detailed Description
It is noted that the following detailed description is exemplary and is intended to provide further explanation of the invention at unless otherwise indicated.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention is further illustrated in the following description with reference to the figures and examples.
A process for treating the waste water generated by processing garlic includes such steps as pretreating the waste water, removing organic pollutants, and biological treating,
step 11: separately collecting garlic slice cleaning wastewater, and combining and collecting other processing wastewater; thereby realizing the quality-based flow distribution of the garlic processing wastewater;
step 12: collecting garlic slice cleaning wastewater in a water collecting tank; collecting other processing wastewater in a water collecting pool;
step 13: the garlic slice cleaning wastewater in the water collecting tank and other processing wastewater in the water collecting tank are respectively pumped into respective micro-filters to be mechanically screened so as to remove fine suspended matters, such as garlic residues and the like, in the wastewater;
step 14: treating the garlic slice cleaning wastewater and other processing wastewater by respective microfilters, and then respectively entering respective sedimentation tanks for gravity sedimentation; the precipitate settled from the garlic flake cleaning wastewater and the precipitate settled from the other processing wastewater respectively enter respective sludge ponds; if the garlicin needs to be recovered, the garlicin can be recovered from the precipitate settled out from the garlic flake cleaning wastewater;
step 15: collecting the supernatant in the two sedimentation tanks into an adjusting tank to wait for a biological treatment process.
In the whole pretreatment process, the garlic processing wastewater is only subjected to pure physical separation of mechanical screening and gravity precipitation, and no aluminum-iron medicament is added, so that the operation cost is reduced.
Preferably, in the step 12, before the garlic flake cleaning wastewater enters the water collecting tank, the garlic flakes are recovered by the garlic flake recovery bag.
Preferably, in the step 12, before entering the water collecting tank, other processing wastewater is passed through a mechanical grid to remove larger suspended substances and particles in the wastewater, such as garlic skins.
Preferably, the biological treatment process comprises the steps of, as shown in figure 2,
step 21: the wastewater after pretreatment in the regulating tank enters a UASB reactor, and organic matters are removed through anaerobic reaction;
step 22, enabling the wastewater treated by the UASB reactor to enter a membrane bioreactor to effectively remove ammonia nitrogen and phosphorus in the wastewater, and removing various pollutants in the membrane bioreactor in step through the metabolism of activated sludge, wherein the ammonia nitrogen is converted into nitrate nitrogen by using the nitrification of nitrifying bacteria, the nitrate nitrogen is converted into nitrogen by using the denitrification of denitrifying bacteria, phosphate is removed by using the characteristic that phosphorus is released by phosphorus accumulating bacteria during anaerobic condition and excessively absorbs phosphorus during aerobic condition, and finally, the effluent is clear and transparent after being sieved by an ultrafiltration membrane, and the main disinfected index can reach level A standard;
step 23: the waste water treated by the membrane bioreactor enters the disinfection tank through the self-priming pump, and the waste water is discharged or recycled after the disinfection effect of the disinfection tank.
Preferably, in the step 21, waste in the cell is regulatedPumping the water into a hydrolysis acidification pool containing hydrolysis acidification bacteria before the water enters the UASB reactor, and effectively decomposing residual allicin in the wastewater; the hydrolytic acidification bacteria in the hydrolytic acidification tank can effectively decompose residual allicin in the wastewater, eliminate the adverse effect of allicin oil on methanogenic bacteria in the UASB reactor and improve the removal rate of organic matters by the UASB reactor; wherein, because the hydrolysis acidification tank effectively decomposes the allicin, the removal rate of the UASB reactor to organic matters can be improved from about 80 percent to over 90 percent, and the COD of the effluent watercrThe concentration is about 200mg/L, and the sterilized product can be directly used for field irrigation.
Preferably, in step 22, the wastewater is treated in a membrane bioreactor with a2The process is carried out by adopting a/O technology.
Preferably, in step 23, chlorine dioxide generated by the chlorine dioxide generator is introduced into the disinfection tank to perform a disinfection function.
According to the garlic processing wastewater treatment process, garlic processing wastewater is divided according to the mass, the removal rate of allicin can be improved, the biological treatment of the wastewater is facilitated, the garlic processing wastewater is only subjected to the pure physical separation of mechanical screening and gravity precipitation, no aluminum and iron medicament is added, the operation cost is reduced, no medicament is added in the whole treatment process, no liquid medicine is required to be prepared, the labor intensity is low, the wastewater in an adjusting tank is pumped into a hydrolysis acidification tank containing hydrolysis acidification bacteria before entering a UASB reactor, the hydrolysis acidification bacteria in the hydrolysis acidification tank can effectively decompose the residual allicin in the wastewater, the adverse effect of allicin oil on methanogenic bacteria in the UASB reactor is eliminated, the removal rate of power consumption organic matters by the UASB reactor is improved, and the anaerobic treatment efficiency is high, less and the operation cost is low because no medicament is added.
Meanwhile, chemical agents such as aluminum, iron and the like are not added in the whole treatment process, so that chemical sludge with high water content and difficult dehydration is not generated; the sludge produced by the treatment process is soil carried by garlic in the pretreatment process, harmless substances such as garlic residues and garlic skins produced in the garlic processing process and various biological sludge produced in the biological treatment process, is easy to dehydrate, is rich in nitrogen and phosphorus, can be used as an agricultural fertilizer or a greening fertilizer, does not produce secondary pollution, does not cause harm to crops, and solves the problem that the sludge produced by the conventional treatment process is difficult to treat and dispose.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the present invention, and it should be understood by those skilled in the art that various modifications and changes may be made without inventive efforts based on the technical solutions of the present invention.
Claims (7)
1, A garlic processing wastewater treatment process, which is characterized by comprising a pretreatment process and a biological treatment process for removing organic pollutants in wastewater, wherein the pretreatment process comprises the following steps,
step 11: separately collecting garlic slice cleaning wastewater, and combining and collecting other processing wastewater;
step 12: collecting garlic slice cleaning wastewater in a water collecting tank; collecting other processing wastewater in a water collecting pool;
step 13: the garlic slice cleaning wastewater in the water collecting tank and other processing wastewater in the water collecting tank are respectively pumped into respective micro-filters for mechanical screening so as to remove fine suspended matters in the wastewater;
step 14: treating the garlic slice cleaning wastewater and other processing wastewater by respective microfilters, and then respectively entering respective sedimentation tanks for gravity sedimentation; the precipitate settled from the garlic flake cleaning wastewater and the precipitate settled from the other processing wastewater respectively enter respective sludge ponds;
step 15: collecting the supernatant in the two sedimentation tanks into an adjusting tank to wait for a biological treatment process.
2. The garlic processing wastewater treatment process according to claim 1, wherein in the step 12, the garlic flake cleaning wastewater is recycled by a garlic flake recycling bag before entering the water collection tank.
3. The process for treating kinds of garlic processing wastewater, as claimed in claim 1, wherein in step 12, the other processing wastewater is passed through a mechanical grid to remove larger suspended substances and particles from the wastewater before entering the water collection tank.
4. The kind of garlic processing wastewater treatment process as claimed in claim 1, wherein the biological treatment process comprises the following steps,
step 21: the wastewater after pretreatment in the regulating tank enters a UASB reactor, and organic matters are removed through anaerobic reaction;
step 22: the wastewater treated by the UASB reactor enters a membrane bioreactor, so that ammonia nitrogen and phosphorus in the wastewater are effectively removed;
step 23: the waste water treated by the membrane bioreactor enters the disinfection tank through the self-priming pump, and the waste water is discharged or recycled after the disinfection effect of the disinfection tank.
5. The process of kinds of waste water from garlic processing as claimed in claim 4, wherein, in step 21, the waste water in the conditioning tank is pumped into a hydrolytic acidification tank containing hydrolytic acidification bacteria before entering the UASB reactor, so as to effectively decompose residual allicin in the waste water.
6. The kind of garlic processing wastewater treatment process as claimed in claim 4, wherein in step 22, the wastewater is processed in a membrane bioreactor by using A2The process is carried out by adopting a/O technology.
7. The process for treating waste water from the processing of kinds of garlic as claimed in claim 4, wherein in step 23, chlorine dioxide generated by the chlorine dioxide generator is introduced into the disinfection tank to perform the disinfection function.
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Cited By (2)
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| CN111533383A (en) * | 2020-05-18 | 2020-08-14 | 郑效成 | Treatment process of wastewater generated by garlic processing garlic slices |
| CN113651714A (en) * | 2021-08-31 | 2021-11-16 | 广东丽臣奥威实业有限公司 | Production method of low-phosphorus sodium lauroyl sarcosinate |
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Application publication date: 20200131 |