CN112679043A - High-oil high-suspension high-ammonia nitrogen food wastewater pretreatment system and method - Google Patents
High-oil high-suspension high-ammonia nitrogen food wastewater pretreatment system and method Download PDFInfo
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- CN112679043A CN112679043A CN202011558083.8A CN202011558083A CN112679043A CN 112679043 A CN112679043 A CN 112679043A CN 202011558083 A CN202011558083 A CN 202011558083A CN 112679043 A CN112679043 A CN 112679043A
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- oil
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- grating
- ammonia nitrogen
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- 239000002351 wastewater Substances 0.000 title claims abstract description 60
- 239000000725 suspension Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 7
- 238000005273 aeration Methods 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 239000004519 grease Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002203 pretreatment Methods 0.000 claims abstract description 7
- 230000014759 maintenance of location Effects 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims abstract description 4
- 239000012528 membrane Substances 0.000 claims abstract description 4
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 11
- 238000000354 decomposition reaction Methods 0.000 claims description 9
- 238000005188 flotation Methods 0.000 claims description 8
- 238000007667 floating Methods 0.000 claims description 7
- 239000000701 coagulant Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 2
- 238000009297 electrocoagulation Methods 0.000 claims 2
- 239000001301 oxygen Substances 0.000 claims 2
- 229910052760 oxygen Inorganic materials 0.000 claims 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 238000005842 biochemical reaction Methods 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 2
- 239000004021 humic acid Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The invention relates to the technical field of food wastewater treatment, and discloses a high-oil high-suspension high-ammonia nitrogen food wastewater pretreatment method, which comprises the following steps: s1: arranging a coarse grating and a fine grating in the grating tank, and introducing the wastewater into the grating tank to intercept larger suspended matters; s2: introducing the wastewater intercepted in the grating tank into an oil separation tank to skim out the grease, blocking the grease through oil separation filter membranes distributed up and down in the oil separation tank, and pumping out the suspended grease through a pump body; s3: aerobic strains are put in the pre-aeration adjusting tank in advance, and then the wastewater after oil skimming is introduced into the pre-aeration adjusting tank. The treatment system has the advantages that the removal rate of oil substances is more than 98%, the removal rate of suspended matters is more than 99%, the removal rate of COD is more than 70%, the PH value of water can be effectively prevented from being reduced to be less than 4.5, the subsequent alkali input amount is reduced, the total nitrogen and ammonia nitrogen are also obviously removed, the removal rate is more than 30%, the retention time of subsequent biochemical reactions is reduced, and the subsequent treatment stability is improved.
Description
Technical Field
The invention relates to the technical field of food wastewater treatment, in particular to a high-oil high-suspension high-ammonia nitrogen food wastewater pretreatment system and a method.
Background
The traditional treatment of high-oil high-suspension high-ammonia nitrogen food wastewater generally adopts a grating pool, an adjusting pool, an anaerobic pool, an aerobic pool and a secondary sedimentation pool, and the pretreatment stage (the grating pool and the adjusting pool) generally has the problems that oil generates humic acid in the adjusting pool stage, so that the acidity of wastewater is enhanced, the oil substances of animals and plants are easy to float to the rear section to generate humic acid, so that the system is unstable, the secondary sedimentation pool is easy to generate floating mud and the like, and food processing enterprises face production stoppage and rectification under the situation of strict environmental supervision.
Disclosure of Invention
The invention aims to provide a high-oil high-suspension high-ammonia nitrogen food wastewater pretreatment system and a high-oil high-suspension high-ammonia nitrogen food wastewater pretreatment method, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a pretreatment method of high-oil high-suspension high-ammonia nitrogen food wastewater comprises the following steps:
s1: arranging a coarse grating and a fine grating in the grating tank, and introducing the wastewater into the grating tank to intercept larger suspended matters;
s2: introducing the wastewater intercepted in the grating tank into an oil separation tank to skim out the grease, blocking the grease through oil separation filter membranes distributed up and down in the oil separation tank, and pumping out the suspended grease through a pump body;
s3: aerobic strains are put into the pre-aeration regulating tank in advance, then the wastewater after oil skimming is introduced into the pre-aeration regulating tank, organic matters in the wastewater are subjected to preliminary aerobic decomposition, and the COD concentration is reduced;
s4: adding a coagulant into the reaction tank, introducing the wastewater subjected to aerobic decomposition into the reaction tank, and stirring by a stirrer to generate a mixture;
s5: and introducing the wastewater after the reaction into an air flotation tank, floating the mixture along with fine bubbles through the air flotation tank, and collecting floating mud.
As a still further scheme of the invention: the depth of the pre-aeration adjusting tank is 2.5-6 m, and the retention time is more than 12 hours.
As a still further scheme of the invention: the mixture is a combination of finely dispersed oil, emulsified oil and flocculent particles.
As a still further scheme of the invention: the air floatation tank is an electric flocculation air floatation tank, and the reaction tank is composed of an electric flocculation reaction tank.
As a still further scheme of the invention: the oil separation tank is an oil skimming machine.
As a still further scheme of the invention: the coarse grating and the fine grating are respectively arranged on the water inlet end and the water outlet end of the grating pool.
As a still further scheme of the invention: the reaction time of the wastewater in the reaction tank is 30-60 min, and the stirring speed of the stirrer is 80-150 r/min.
The utility model provides a high-oil high-suspended matter high ammonia nitrogen food wastewater pretreatment system, includes grid pond, oil interceptor, preliminary aeration equalizing basin, reaction tank and the air supporting pond that connects gradually, the grid pond is arranged in damming the great suspended solid in the waste water, the oil interceptor is arranged in driving away the grease in the waste water, preliminary aerobic decomposition is carried out to the organic matter in the waste water to the preliminary aeration equalizing basin in advance to reduce COD concentration, the reaction tank is used for mixing the back with waste water and coagulant and reacts, and generates slight flocculent particles thing, the air supporting pond is used for carrying out solid-liquid separation with waste water to the superficial mud of will separating is collected.
Compared with the prior art, the invention has the beneficial effects that: the treatment system has the advantages that the removal rate of oil substances is more than 98%, the removal rate of suspended matters is more than 99%, the removal rate of COD is more than 70%, the PH value of water can be effectively prevented from being reduced to be less than 4.5, the subsequent alkali input amount is reduced, the total nitrogen and ammonia nitrogen are also obviously removed, the removal rate is more than 30%, the retention time of subsequent biochemical reactions is reduced, and the subsequent treatment stability is improved.
Drawings
FIG. 1 is a schematic structural diagram of a high-oil high-suspension high-ammonia nitrogen food wastewater pretreatment system.
Detailed Description
Referring to fig. 1, in an embodiment of the present invention, a method for pretreating high-oil high-suspension high-ammonia nitrogen food wastewater includes the following steps:
s1: arranging a coarse grating and a fine grating in the grating tank, and introducing the wastewater into the grating tank to intercept larger suspended matters;
s2: introducing the wastewater intercepted in the grating tank into an oil separation tank to skim out the grease, blocking the grease through oil separation filter membranes distributed up and down in the oil separation tank, and pumping out the suspended grease through a pump body;
s3: aerobic strains are put into the pre-aeration regulating tank in advance, then the wastewater after oil skimming is introduced into the pre-aeration regulating tank, organic matters in the wastewater are subjected to preliminary aerobic decomposition, and the COD concentration is reduced;
s4: adding a coagulant into the reaction tank, introducing the wastewater subjected to aerobic decomposition into the reaction tank, and stirring by a stirrer to generate a mixture;
s5: and introducing the wastewater after the reaction into an air flotation tank, floating the mixture along with fine bubbles through the air flotation tank, and collecting floating mud.
Preferably: the depth of the pre-aeration adjusting tank is 2.5-6 m, and the retention time is more than 12 hours.
Preferably: the mixture is a composition of finely dispersed oil, emulsified oil and flocculent particles.
Preferably: the air floatation tank is an electric flocculation air floatation tank, and the reaction tank is composed of an electric flocculation reaction tank.
Preferably: the oil separation tank is an oil skimming machine.
Preferably: the coarse grating and the fine grating are respectively arranged on the water inlet end and the water outlet end of the grating pool.
Preferably: the reaction time of the wastewater in the reaction tank is 50min, and the stirring speed of the stirrer is 100 r/min.
The utility model provides a high-oil high-suspended matter high ammonia nitrogen food wastewater pretreatment system, including the grid pond that connects gradually, the oil interceptor, the preliminary aeration equalizing basin, reaction tank and air supporting pond, the grid pond is arranged in damming the great suspended matter in the waste water, the oil interceptor is arranged in driving away the grease in the waste water, the preliminary aerobic decomposition is carried out to the organic matter in the waste water to the preliminary aeration equalizing basin in advance, and reduce COD concentration, the reaction tank is used for mixing waste water and coagulant back and reacting, and generate slight flocculent particles, the air supporting pond is used for carrying out solid-liquid separation with waste water, and collect the superficial mud of separating.
The treatment system has the advantages that the removal rate of oil substances is more than 98%, the removal rate of suspended matters is more than 99%, the removal rate of COD is more than 70%, the PH value of water can be effectively prevented from being reduced to be less than 4.5, the subsequent alkali input amount is reduced, the total nitrogen and ammonia nitrogen are also obviously removed, the removal rate is more than 30%, the retention time of subsequent biochemical reactions is reduced, and the subsequent treatment stability is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (8)
1. A pretreatment method of high-oil high-suspension high-ammonia nitrogen food wastewater is characterized by comprising the following steps:
s1: arranging a coarse grating and a fine grating in the grating tank, and introducing the wastewater into the grating tank to intercept larger suspended matters;
s2: introducing the wastewater intercepted in the grating tank into an oil separation tank to skim out the grease, blocking the grease through oil separation filter membranes distributed up and down in the oil separation tank, and pumping out the suspended grease through a pump body;
s3: aerobic strains are put into the pre-aeration regulating tank in advance, then the wastewater after oil skimming is introduced into the pre-aeration regulating tank, organic matters in the wastewater are subjected to preliminary aerobic decomposition, and the COD concentration is reduced;
s4: adding a coagulant into the reaction tank, introducing the wastewater subjected to aerobic decomposition into the reaction tank, and stirring by a stirrer to generate a mixture;
s5: and introducing the wastewater after the reaction into an air flotation tank, floating the mixture along with fine bubbles through the air flotation tank, and collecting floating mud.
2. The pretreatment method of high-oil high-suspension high-ammonia nitrogen food wastewater according to claim 1, characterized in that the depth of the pre-aeration adjusting tank is 2.5-6 m, and the retention time is more than 12 hours.
3. The method for pretreating food wastewater with high oil content, high suspension content and high ammonia nitrogen content according to claim 1, wherein the mixture is a composition of finely dispersed oil, emulsified oil and flocculent particles.
4. The pretreatment method of high-oil high-suspension high-ammonia nitrogen food wastewater according to claim 1, characterized in that the flotation tank is an electrocoagulation flotation tank, and the reaction tank is an electrocoagulation reaction tank.
5. The method for pretreating high-oil high-suspension high-ammonia nitrogen food wastewater according to claim 1, wherein the oil separation tank is an oil skimming machine.
6. The pretreatment method of high-oil high-suspension high-ammonia nitrogen food wastewater according to claim 1, wherein the coarse grating and the fine grating are respectively installed on the water inlet end and the water outlet end of the grating pond.
7. The method for pretreating food wastewater with high oil content, high suspension content and high ammonia nitrogen content according to claim 1, wherein the reaction time of the wastewater in the reaction tank is 30-60 min, and the stirring speed of the stirrer is 80-150 r/min.
8. The utility model provides a high ammonia nitrogen food wastewater pretreatment systems of high oily high suspension, its characterized in that, including grid pond, oil interceptor, preliminary aeration equalizing basin, reaction tank and the air supporting pond that connects gradually, the grid pond is arranged in damming the great suspended solid in the waste water, the oil interceptor is arranged in driving away the grease in the waste water, preliminary good oxygen decomposition is carried out to the organic matter in the waste water to the preliminary aeration equalizing basin is used for carrying out the good oxygen of preliminary aeration and is decomposed to reduce COD concentration, the reaction tank is used for mixing the back and reacting waste water and coagulant, and generates slight flocculent particles thing, the air supporting pond is used for carrying out solid-liquid separation with waste water to the superficial mud of will separating is collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558083.8A CN112679043A (en) | 2020-12-25 | 2020-12-25 | High-oil high-suspension high-ammonia nitrogen food wastewater pretreatment system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558083.8A CN112679043A (en) | 2020-12-25 | 2020-12-25 | High-oil high-suspension high-ammonia nitrogen food wastewater pretreatment system and method |
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| Publication Number | Publication Date |
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| CN112679043A true CN112679043A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011558083.8A Pending CN112679043A (en) | 2020-12-25 | 2020-12-25 | High-oil high-suspension high-ammonia nitrogen food wastewater pretreatment system and method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633359A (en) * | 2012-04-23 | 2012-08-15 | 中蓝连海设计研究院 | Method for treating total nitrogen of nitrogen-containing chemical wastewater |
| CN103613245A (en) * | 2013-12-02 | 2014-03-05 | 安徽省绿巨人环境技术有限公司 | Treatment process for waste water in neuropeptide product production |
| CN109052827A (en) * | 2018-08-21 | 2018-12-21 | 重庆中标环保集团有限公司 | Food waste percolate enhanced processing method and system |
| CN208883670U (en) * | 2018-08-21 | 2019-05-21 | 苏州市华测检测技术有限公司 | A kind of kitchen waste water processing unit |
-
2020
- 2020-12-25 CN CN202011558083.8A patent/CN112679043A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633359A (en) * | 2012-04-23 | 2012-08-15 | 中蓝连海设计研究院 | Method for treating total nitrogen of nitrogen-containing chemical wastewater |
| CN103613245A (en) * | 2013-12-02 | 2014-03-05 | 安徽省绿巨人环境技术有限公司 | Treatment process for waste water in neuropeptide product production |
| CN109052827A (en) * | 2018-08-21 | 2018-12-21 | 重庆中标环保集团有限公司 | Food waste percolate enhanced processing method and system |
| CN208883670U (en) * | 2018-08-21 | 2019-05-21 | 苏州市华测检测技术有限公司 | A kind of kitchen waste water processing unit |
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Application publication date: 20210420 |