CN113511780A - Efficient and environment-friendly food processing sewage treatment system and deacidification method - Google Patents
Efficient and environment-friendly food processing sewage treatment system and deacidification method Download PDFInfo
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- 239000010865 sewage Substances 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012545 processing Methods 0.000 title claims abstract description 32
- 235000013305 food Nutrition 0.000 title claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 82
- 238000001556 precipitation Methods 0.000 claims abstract description 45
- 239000010802 sludge Substances 0.000 claims abstract description 42
- 230000015556 catabolic process Effects 0.000 claims abstract description 26
- 238000006731 degradation reaction Methods 0.000 claims abstract description 26
- 239000002253 acid Substances 0.000 claims description 73
- 238000004062 sedimentation Methods 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 33
- 235000013399 edible fruits Nutrition 0.000 claims description 29
- 239000007789 gas Substances 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 20
- 239000001301 oxygen Substances 0.000 claims description 20
- 241000235342 Saccharomycetes Species 0.000 claims description 18
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 18
- 238000005273 aeration Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 11
- 238000006386 neutralization reaction Methods 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 9
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 9
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 6
- 150000001720 carbohydrates Chemical class 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 210000003437 trachea Anatomy 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000006065 biodegradation reaction Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000004083 survival effect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 241000233866 Fungi Species 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- BJHIKXHVCXFQLS-UYFOZJQFSA-N keto-D-fructose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)C(=O)CO BJHIKXHVCXFQLS-UYFOZJQFSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000010909 process residue Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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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
-
- 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
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a high-efficiency environment-friendly food processing sewage treatment system and a deacidification method, which comprise a deacidification tank, an organic degradation zone and a precipitation separation zone, wherein the organic degradation zone comprises an anaerobic tank, an aerobic primary tank and an aerobic secondary tank, the precipitation separation zone comprises a precipitation separation tank and a secondary precipitation separation tank, one side of the precipitation separation zone is connected with an adjusting tank, the deacidification tank, the organic degradation zone, the precipitation separation zone and the adjusting tank are sequentially connected in series, sewage treated by each tank is transmitted to the next tank through a sewage conveying system, the lower layers of the precipitation separation tank and the secondary precipitation separation tank are transmitted to the anaerobic tank through a pipeline through a sludge pump for circular treatment, and the sewage is treated by the adjusting tank and then is discharged through a discharge pipe. According to the invention, the sewage is neutralized in advance through the deacidification tank, so that a good living environment is provided for each degradation tank flora, the organic matter decomposition efficiency is improved, the degradation tanks are arranged to decompose the organic matters in the sewage, the precipitated sludge is recycled, the sewage treatment efficiency is improved, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of food processing, in particular to a high-efficiency environment-friendly food processing sewage treatment system and an acid removal method.
Background
In the food processing process of food sweetmeat and the like, the process of cleaning sugar stains and the like generally generates processing sewage, and the sewage generally contains fruit acids, impurities, oil stains, cleaning machines, sugar and the like, has the characteristics of complex components, dark color and high concentration, and belongs to industrial sewage which is difficult to treat.
The existing food processing plant sewage treatment process does not consider the influence of the fruit acid on the degradation of fungi, the fruit acid and the saccharides in the sewage are not completely degraded, the growth environment of the fungi cannot be maintained, the cyclic treatment utilization rate does not reach the standard, finally, the pollution discharge index exceeds the standard, and the environment is damaged, time-consuming, labor-consuming and financial-consuming.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a high-efficiency and environment-friendly food processing sewage treatment system and a deacidification method, which can create an innovative process flow, increase the degradation rate of sewage pollutants, protect the environment and save the cost.
In order to achieve the above purpose, the invention adopts the technical scheme that:
the utility model provides a high-efficient environmental protection food processing sewage treatment system, includes that it includes acid tank, organic degradation district and sedimentation separation district to remove, organic degradation district includes anaerobism pond, good oxygen one-level pond and good oxygen second grade pond, sedimentation separation district includes sedimentation separation pond and secondary sedimentation separation pond, the equalizing basin is connected to sedimentation separation district one side, remove the acid tank organic degradation district the sedimentation separation district with the equalizing basin concatenates in proper order, and the sewage after each pond is handled transmits to next pond through sewage conveying system, the sedimentation separation pond with secondary sedimentation separation pond lower floor passes through the sludge pump and passes through pipeline transmission to anaerobism pond circulation processing, and the processing is accomplished sewage and is handled the back through the delivery pipe and discharge through the equalizing basin.
Further, it goes into the pipe to remove acid tank top one side and be fixed with sewage, install the solenoid valve on the sewage goes into the pipe, remove the acid tank with mixing system is all installed at the equalizing basin top, mixing system mainly comprises first motor, first stirring post and first stirring leaf, mixing system is controlled by the automatic control dish.
Further, remove sour pond right side with the anaerobism pond is connected, installs sewage conveying system on the connection wall, sewage conveying system mainly comprises liquid suction pipe, first hand valve, fluid-discharge tube, filter screen, sewage pump, the sewage pump other end is connected to liquid suction pipe one end and is installed the filter screen and place in the deacidification pond and be close to bottom one side, fluid-discharge tube one end is connected the sewage pump other end and is arranged in anaerobism pond top one side and install first hand valve on the pipe, sewage conveying system is by automatic control dish control.
Furthermore, the bottom of the liquid pumping pipe in the sedimentation separation tank and the secondary sedimentation separation tank is positioned on the upper layer of the water tank, namely the upper layer of the sedimentation separation tank is conveyed to the secondary sedimentation separation tank through a sewage conveying system, and the upper layer of the secondary sedimentation separation tank is conveyed to the regulating tank through the sewage conveying system.
Furthermore, the sedimentation separation tank with bottom one side in the secondary sedimentation separation tank is equipped with bottom of the pool sludge pipe preformed hole respectively, bottom of the pool sludge pipe preformed hole has the sludge pump through pipe connection respectively, be equipped with the second hand valve on the sludge pump exit tube respectively, and install the check valve on compiling the pipeline, the sludge pump is controlled by the automatic control dish.
Further, good oxygen first-order pond with good oxygen second grade bottom of the pool portion is equipped with aeration systems, aeration systems mainly by high-pressure gas pump, trachea installation preformed hole, trachea hand valve, trachea check valve, diffuse pipe and miniature hole of diffusing, good oxygen first-order pond with good oxygen second grade bottom of the pool portion is respectively laid side by side and is equipped with the diffuse pipe, the last intensive miniature hole of diffusing that is equipped with of diffuse pipe, diffuse manifold header pipe passes respectively good oxygen first-order pond with good oxygen second grade bottom of the pool portion homonymy and install the trachea check valve respectively in the outside, install the trachea hand valve on the high-pressure gas pump gas outlet pipe, the high-pressure gas pump is controlled by automatic control dish.
Furthermore, temperature control plates are respectively arranged on one sides of the acid removing pool, the aerobic primary pool and the aerobic secondary pool, the temperature control plates are controlled by an automatic control disc, and the automatic control disc is positioned on one side of the acid removing pool.
The invention also aims to provide a high-efficiency environment-friendly food processing sewage deacidification method, which specifically comprises the following steps:
s1, removing acid from the food processing fruit acid-containing sewage through the acid removing tank (1), adjusting the pH value to 6.0-6.5, and conveying the food processing fruit acid-containing sewage to the anaerobic tank;
s2, putting activated sludge into the anaerobic tank (5), wherein the activated sludge mainly contains saccharomycetes, the temperature is adjusted to be 28-30 ℃, the oxygen content of sewage is less than or equal to 0.01mg/L, and conveying the incompletely degraded sewage into the aerobic primary tank (6) after the sewage is biodegraded in the anaerobic tank for 5-6 hours;
s3, putting activated sludge into the aerobic primary tank (6), wherein the activated sludge mainly contains saccharomycetes, the temperature is adjusted to be 28-30 ℃, the oxygen content of the sewage is increased to be 4.0-4.5mg/L through an aeration system, and the sewage which is not completely degraded is conveyed into the aerobic secondary tank (7) after the sewage is biologically degraded in the aerobic tank for 5-6 hours;
s4, putting activated sludge into the aerobic secondary tank (7), wherein the activated sludge mainly contains saccharomycetes, the temperature is adjusted to be 28-30 ℃, the oxygen content of sewage is increased to be 4.5-5.0mg/L through an aeration system, and the degraded sewage is conveyed to the sedimentation separation tank (8) after being biodegraded for 5-6 hours through the aerobic secondary tank (7);
s5, after 2.5-3.0h of precipitation separation in the precipitation separation tank (8), the upper layer is conveyed to a secondary precipitation separation tank (9), and the lower layer is pumped into an anaerobic tank (5) to repeat the step S2;
s6, after 3.0-4.0h of precipitation separation in the secondary precipitation separation tank (9), the upper layer is conveyed to the regulating tank (10), and the lower layer is pumped into the anaerobic tank (5) to repeat the step S2;
s7, measuring that the COD of the adjusting tank (10) is less than or equal to 300mg/L, and discharging through a discharge pipe.
Further, in step S1, the present invention provides a method for removing acid, which specifically includes the following steps:
1) adding the food processing fruit acid-containing sewage into an acid removal tank, controlling the amount of the sewage entering the acid removal tank by controlling a solenoid valve through an automatic control panel, and controlling the whole stirring acid removal temperature to be 20-30 ℃ through a temperature control system;
2) the amount of NaHCO3 added was calculated by a pH monitor, NaHCO3 powder was slowly added to the fruit acid-containing wastewater, and stirred until the pH monitor showed a pH of 6.0-6.5, which was accompanied by heat evolution during stirring.
3) In the solution with the pH value more than 5.0, most fruit acid molecules are dissociated, the neutralized sewage is continuously stirred for 0.5 to 1 hour to promote the fruit acid to be fully dissociated, and the change of a pH value monitor is observed;
4) adding a small amount of NaHCO3 into the fruit acid-containing sewage, continuously stirring for 0.5-1h, observing the pH value to be 6.0-6.5, pumping the sewage into an anaerobic pool for treatment, and repeating the step 2 if the pH value is not reached).
Furthermore, in the step 2), the temperature of the water is changed by heat in the stirring process, and the temperature control plate is heated or cooled according to the detected sewage temperature.
Compared with the prior art, the invention has the following advantages:
1) according to the invention, the deacidification tank is arranged, and considering that the pH value is more than 3 when the concentration of the fruit acid in the sewage is below 5%, the pH value of the yeast is most suitable for propagation and is 6.0-6.5, if the yeast is not neutralized in the deacidification tank in advance, the propagation speed of the yeast is low, the activity is low or the degradation efficiency is low, the pH value of the sewage is firstly adjusted to the adaptation range of the flora, then the flora is biodegraded in a degradation area, the survival rate and the degradation capability of the flora are greatly improved, and most fruit acid molecules are dissociated in the solution with the pH value more than 5.
2) The invention is provided with a plurality of degradation pools, makes full use of the good degradation characteristics of the saccharomycetes in anaerobic and aerobic environments, decomposes the sugar into alcohol and carbon dioxide under the condition of oxygen deficiency, decomposes the sugar into carbon dioxide and water under the condition of oxygen, and fully decomposes the sugar, fruit acid and the like in sewage by arranging the aerobic primary pool and the aerobic secondary pool, thereby greatly improving the efficiency of biodegradation treatment on the sewage.
3) In the invention, the precipitation separation area is provided with the precipitation separation tank and the secondary precipitation separation tank, double-layer precipitation is adopted to reduce impurities in the degraded sewage, and the active mud and the precipitate in the precipitation layer are pumped back to the anaerobic tank for recycling, so that the cost is saved, and the cyclic utilization rate of the system operation is increased.
4) The automatic control panel is arranged to control the sewage conveying system, the temperature control plate, the aeration system, the sludge pump, the electromagnetic valve and the like, so that the labor cost is greatly reduced, and the integrated operation of the system is realized.
Drawings
FIG. 1 is a schematic view of the sewage treatment system and the deacidification method of the present invention;
FIG. 2 is a schematic view of the structure of the aeration system of the present invention;
the device comprises an acid removal tank 1, a sewage inlet pipe 2, an electromagnetic valve 201, a stirring system 3, a first motor 301, a first stirring column 302, a first stirring blade 303, a sewage conveying system 4, a liquid pumping pipe 401, a first hand valve 402, a liquid discharging pipe 403, a filter screen 404, a sewage pump 405, an anaerobic tank 5, an aerobic primary tank 6, a temperature control plate 601, a high-pressure gas pump 602, a gas pipe installation reserved hole 603, a gas pipe hand valve 604, a gas pipe check valve 605, a diffusing pipe 606, a micro diffusing hole 607, an aerobic secondary tank 7, a precipitation separation tank 8, a sludge pump 801, a tank bottom sludge pipe reserved hole 802, a check valve 803, a second hand valve 804, a secondary precipitation separation tank 9, an adjusting tank 10, a discharge pipe 1001 and an automatic control panel 11.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Example 1
As shown in figure 1-2, a high-efficiency environment-friendly food processing sewage treatment system, a deacidification method and a deacidification method, which comprises a deacidification tank 1, an organic degradation zone and a precipitation separation zone, wherein the organic degradation zone comprises an anaerobic tank 5, an aerobic primary tank 6 and an aerobic secondary tank 7, the precipitation separation zone comprises a precipitation separation tank 8 and a secondary precipitation separation tank 9, one side of the precipitation separation zone is connected with an adjusting tank 10, the deacidification tank 1, the organic degradation zone, the precipitation separation zone and the adjusting tank 10 are sequentially connected in series, sewage treated by each tank is transmitted to the next tank through a sewage conveying system 4, the lower layers of the precipitation separation tank 8 and the secondary precipitation separation tank 9 are transmitted to the anaerobic tank 5 through a sludge pump 801 through pipelines for circular treatment, the treated sewage is discharged through a discharge pipe 1001 after being treated by the adjusting tank 10, a plurality of degradation tanks are arranged, and the good degradation characteristics of yeast under anaerobic and aerobic conditions are fully utilized, the aerobic primary tank and the aerobic secondary tank are arranged to fully decompose saccharides, fruit acids and the like in the sewage, so that the biodegradation treatment efficiency of the sewage is greatly improved.
As shown in fig. 1, in this embodiment, a sewage inlet pipe 2 is fixed on one side of the top of an acid removal tank 1, a solenoid valve 201 is installed on the sewage inlet pipe 2, stirring systems 3 are installed on the tops of the acid removal tank 1 and an adjusting tank 10, the stirring systems 3 mainly include a first motor 301, a first stirring column 302 and a first stirring blade 303, the stirring systems 3 are controlled by an automatic control panel (11), and the stirring system is added to increase the rate of pH neutralization and adjustment of sewage.
Wherein, remove that acid tank 1 and equalizing basin 10 top all install mixing system 3, sewage is gone into pipe 2 and is controlled by automatic control dish (11) with the solenoid valve 201 switch of discharge pipe 1001, and mixing system 3 installs through the mounting bracket and puts at removing 1 top central point in acid tank, and first stirring post 302 is located and removes acid tank 1 and equalizing basin 10 middle part, and through the vertical installation of axle sleeve connection at first motor 301 output, installs first stirring leaf 303 on the first stirring post 302.
As shown in fig. 1, in this embodiment, the right side of the deacidification tank 1 is connected with the anaerobic tank 5, the sewage conveying system 4 is installed on the connecting wall, the sewage conveying system 4 mainly comprises a liquid pumping pipe 401, a first hand valve 402, a liquid discharging pipe 403, a filter screen 404 and a sewage pump 405, one end of the liquid pumping pipe 401 is connected with the sewage pump 405, the other end of the liquid pumping pipe is installed with the filter screen 404 and is placed at one side of the deacidification tank 1 close to the bottom, one end of the liquid discharging pipe 403 is connected with the sewage pump 405, the other end of the liquid discharging pipe is placed at one side of the top of the anaerobic tank 5, and the first hand valve 402 is installed on the pipe,
wherein, a sewage conveying system 4 is arranged on the connecting wall of an acid removing pool 1 and an anaerobic pool 5, an anaerobic pool 5 and an aerobic primary pool 6, an aerobic primary pool 6 and an aerobic secondary pool 7, an aerobic secondary pool 7 and a sedimentation separation pool 8, a sedimentation separation pool 8 and a secondary sedimentation separation pool 9, and a secondary sedimentation separation pool 9 and an adjusting pool 10, and sections of filter screens 404 arranged on the liquid pumping pipes 401 in the acid removing pool 1, the anaerobic pool 5, the aerobic primary pool 6 and the aerobic secondary pool 7 are all arranged below one side; the sewage is treated step by installing the sewage conveying system 4, and the automatic control is realized by the automatic control panel 11.
As shown in fig. 1, in this embodiment, the bottoms of the liquid pumping pipes 401 in the sedimentation separation tank 8 and the secondary sedimentation separation tank 9 are located at the upper layer of the water tank, i.e. the upper layer of the sedimentation separation tank 8 is conveyed to the secondary sedimentation separation tank 9 through the sewage conveying system 4, and the upper layer of the secondary sedimentation separation tank 9 is conveyed to the regulating tank 10 through the sewage conveying system 4.
As shown in fig. 1, in this embodiment, bottom sludge pipe preformed holes 802 are respectively arranged on one side of the bottoms in the sedimentation separation tank 8 and the secondary sedimentation separation tank 9, the bottom sludge pipe preformed holes 802 are respectively connected with a sludge pump 801 through pipelines, a second hand valve 804 is respectively arranged on an outlet pipe of the sludge pump 801, a check valve 803 is installed on a collecting pipeline, the sludge pump 801 is controlled by an automatic control panel 11, the sludge pump 801 and the second hand valve 804 are opened to pump bottom activated sludge and sediments in the sedimentation separation tank 8 and the secondary sedimentation separation tank 9 into the anaerobic tank 1, activated sludge and sediments containing yeasts in a sedimentation layer are pumped back into the anaerobic tank for recycling, the cost is saved, and the system operation recycling rate is increased.
As shown in fig. 1 and 2, in this embodiment, the bottom of the aerobic primary tank 6 and the aerobic secondary tank 7 are provided with aeration systems, the aeration systems mainly comprise a high-pressure gas pump 602, a gas pipe installation reserved hole 603, a gas pipe hand valve 604, a gas pipe one-way valve 605, a diffusing pipe 606 and a micro diffusing hole 607, the bottom of the aerobic primary tank 6 and the bottom of the aerobic secondary tank 7 are respectively provided with the diffusing pipe 606 in parallel, the diffusing pipe 606 is provided with the micro diffusing hole 607 in an intensive manner, the converging pipes of the diffusing pipe 606 respectively pass through the same side of the bottom of the aerobic primary tank 6 and the bottom of the aerobic secondary tank 7 and are respectively provided with the gas pipe one-way valve 605 on the outer side, the gas outlet pipe of the high-pressure gas pump 602 is provided with the gas pipe hand valve 604, the high-pressure gas pump 602 is controlled by the automatic control panel 11, the high-pressure gas pump 602 is started by the automatic control panel 11 to convey compressed air into the converging pipes of the converging pipes and the bottom of the high-pressure primary tank 6 and the aerobic secondary tank 7 through the micro diffusing hole 607, oxygen in the air is continuously dissolved into water, so that the oxygen concentration in the water is increased, and a good living environment is provided for saccharomycetes to degrade saccharides.
As shown in figures 1 and 2, a temperature control plate 601 is respectively installed on one side of the acid removal tank 1, the aerobic primary tank 6 and the aerobic secondary tank 7, the temperature control plate 601 is controlled by an automatic control panel 11, the automatic control panel 11 is positioned on one side of the acid removal tank 1, the automatic control panel 11 is arranged to control a sewage conveying system, the temperature control plate, an aeration system, a sludge pump, an electromagnetic valve and the like, the labor cost is greatly reduced, and the integrated operation of the system is realized.
As shown in fig. 1, in this embodiment, a high-efficiency and environment-friendly food processing sewage treatment system and an acid removal method specifically include the following steps:
s1, after the acid in the food processing waste water containing the fruit acid is removed by the acid removing pool, adjusting the pH value to 6.0-6.5, and in the solution with the pH value more than 5.0, most fruit acid molecules are dissociated, and then conveying the adjusted waste water to the anaerobic pool;
s2, putting active sludge containing saccharomycetes into an anaerobic tank, wherein the saccharomycetes can decompose saccharides and generate carbon dioxide and alcohol under an anaerobic environment, adjusting the temperature to be 28-30 ℃ suitable for the growth of the saccharomycetes, carrying out aerobic decomposition on sewage just after the sewage enters the anaerobic tank, and after oxygen in water is consumed, carrying out anaerobic degradation on the sewage for 5-6 hours and then conveying the sewage into an aerobic primary tank;
s3, putting active sludge containing saccharomycetes into the aerobic primary tank, wherein the saccharomycetes can decompose saccharides and generate carbon dioxide and water and can rapidly propagate in an aerobic environment, the temperature is adjusted to be 28-30 ℃ suitable for propagation and growth of the saccharomycetes, the oxygen content of sewage is increased to 4.0-4.5mg/L through an aeration system, and the sewage which is not completely degraded is conveyed into an aerobic secondary tank after being biodegraded for 5-6 hours in the aerobic tank;
s4, adding activated sludge containing saccharomycetes into the aerobic secondary tank (7), adjusting the temperature to be 28-30 ℃, increasing the oxygen content of sewage to be 4.5-5.0mg/L through an aeration system, and conveying the degraded sewage to a precipitation separation tank (8) after biodegradation is carried out in the aerobic secondary tank (7) for 5-6 hours;
s5, after 2.5-3h of precipitation separation in the precipitation separation tank (8), conveying the upper layer to a secondary precipitation separation tank (9), pumping the lower layer into an anaerobic tank (5), and repeating the step S2;
s6, after 3.0-4.0h of precipitation separation in the secondary precipitation separation tank (9), the upper layer is conveyed to the regulating tank (10), and the lower layer is pumped into the anaerobic tank (5) to repeat the step S2;
s7, measuring that the COD of the adjusting tank (10) is less than or equal to 300mg/L, and discharging through a discharge pipe.
Wherein, step S1 specifically includes the following steps:
1) adding the food processing fruit acid-containing sewage into an acid removal tank, controlling the amount of the sewage entering the acid removal tank by controlling a solenoid valve through an automatic control panel, and controlling the whole stirring acid removal temperature to be 20-30 ℃ through a temperature control system;
2) calculating the amount of NaHCO3 by using a pH value monitor, slowly adding NaHCO3 powder into the fruit acid-containing sewage, stirring until the pH value monitor shows that the neutralization pH value is 6.0-6.5, discharging heat in the stirring process, and heating or cooling by using a temperature control plate according to the detected sewage temperature;
3) because the fruit acid belongs to weak acid, continuously stirring the neutralized sewage for 0.5-1h to promote the fruit acid to be fully dissociated, and observing the change of a pH value monitoring meter;
4) adding a small amount of NaHCO3 into the fruit acid-containing sewage, continuously stirring for 0.5-1h, observing the pH value to be 6.0-6.5, pumping the sewage into an anaerobic pool (5) for treatment, and repeating the step 2 if the pH value is not reached.
Example 2
Taking the sewage treated by the process flow in the embodiment 1, and simultaneously taking the sewage containing the fruit acid treated by the process without the acid removal tank as a control group to carry out the detection of the content of COD.
The sewage treated by the process flow of the embodiment 1 is sampled for 6 times and respectively detected for COD content, and meanwhile, the sewage containing fruit acid and treated by the process without the acid removal tank is sampled for 6 times for detecting the COD content, and the detection results are as follows:
TABLE 1 COD content determination
As can be seen from Table 1, the COD content obtained by directly carrying out simple process treatment on the sewage by the control group is higher and approaches the emission limit value, the water pollution is serious, the treatment effect is poor, the COD content is sharply reduced after the treatment by the innovative process flow, and the treatment efficiency is high.
Example 3
Sampling and detecting the sewage drainage buttons which are treated by the neutralization pH value of 6.0, the neutralization pH value of 6.3 and the neutralization pH value of 6.5 in the deacidification tank in the process flow of example 1, and sampling and detecting the sewage drainage buttons which are treated by the neutralization pH value of 5.0 in the process flow of the control group of example 1, wherein the detection item is COD content detection.
The sewage treated by the acid removal tank with the neutralization pH value of 6.0, the pH value of 6.3 and the pH value of 6.5 in the process flow of example 1 was sampled 6 times and the COD content was detected, and the sewage treated by the acid removal tank with the neutralization pH value of 5.0 in the process flow of example 1 was sampled 6 times to detect the COD content, and the detection results are as follows:
TABLE 2 COD content determination
As can be seen from Table 2, the control group wastewater is neutralized to 5.0 by the pH value of the deacidification tank and then is subjected to the residual process treatment, so that the COD content of the wastewater discharge is higher, and the influence of the pH value on the survival and degradation capability of the yeast is verified; through the comparison of three groups of data, namely pH value neutralization of the sewage to pH 6.0, pH 6.3 and pH 6.5, the COD concentration of the sewage treated by the process with the pH 6.0 and pH 6.5 set in the deacidification tank is close, the influence of the sewage treated by the deacidification tank on the saccharomycetes is similar, and the COD concentration of the sewage treated by the process with the pH 6.3 set in the deacidification tank is relatively lower, which indicates that the degradation capability of the saccharomycetes is stronger, and the survival pH value of the saccharomycetes designed by the process is preferably 6.0-6.5.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A high-efficiency environment-friendly food processing sewage treatment system, which comprises an acid removal tank (1), an organic degradation zone and a precipitation separation zone, it is characterized in that the organic degradation zone comprises an anaerobic tank (5), an aerobic primary tank (6) and an aerobic secondary tank (7), the precipitation separation area comprises a precipitation separation pool (8) and a secondary precipitation separation pool (9), one side of the precipitation separation zone is connected with an adjusting tank (10), the acid removal tank (1), the organic degradation zone, the precipitation separation zone and the adjusting tank (10) are sequentially connected in series, the sewage treated by each water tank is transmitted to the next water tank through a sewage conveying system (4), the lower layers of the sedimentation separation tank (8) and the secondary sedimentation separation tank (9) are transmitted to an anaerobic tank (5) through a sludge pump (801) through pipelines for circular treatment, and the treated sewage is discharged through a discharge pipe (1001) after being treated by a regulating tank (10).
2. The efficient and environment-friendly food processing sewage treatment system according to claim 1, wherein a sewage inlet pipe (2) is fixed on one side of the top of the acid removing tank (1), an electromagnetic valve (201) is installed on the sewage inlet pipe (2), stirring systems (3) are installed on the tops of the acid removing tank (1) and the adjusting tank (10), each stirring system (3) mainly comprises a first motor (301), a first stirring column (302) and a first stirring blade (303), and each stirring system (3) is controlled by an automatic control panel (11).
3. The efficient and environment-friendly food processing sewage treatment system according to claim 1, wherein the right side of the deacidification tank (1) is connected with the anaerobic tank (5), the sewage conveying system (4) is installed on the connecting wall, the sewage conveying system (4) mainly comprises a liquid suction pipe (401), a first hand valve (402), a liquid discharge pipe (403), a filter screen (404) and a sewage pump (405), one end of the liquid suction pipe (401) is connected with the other end of the sewage pump (405), the filter screen (404) is installed at the other end of the liquid suction pipe and is placed at one side of the deacidification tank (1) close to the bottom, one end of the liquid discharge pipe (403) is connected with the other end of the sewage pump (405), the other end of the liquid suction pipe is placed at one side of the top of the anaerobic tank (5), the first hand valve (402) is installed on the pipe, and the sewage conveying system (4) is controlled by an automatic control panel (11).
4. The high-efficiency and environment-friendly food processing sewage treatment system according to claim 1, wherein the bottom of the liquid extraction pipe (401) in the sedimentation separation tank (8) and the secondary sedimentation separation tank (9) is located at the upper layer of the tank, namely, the upper layer of the sedimentation separation tank (8) is conveyed to the secondary sedimentation separation tank (9) through the sewage conveying system (4), and the upper layer of the secondary sedimentation separation tank (9) is conveyed to the regulating tank (10) through the sewage conveying system (4).
5. The high-efficiency environment-friendly food processing sewage treatment system according to claim 4, wherein one side of the bottom of the sedimentation separation tank (8) and the secondary sedimentation separation tank (9) is respectively provided with a tank bottom sludge pipe preformed hole (802), the tank bottom sludge pipe preformed holes (802) are respectively connected with a sludge pump (801) through pipelines, the outlet pipes of the sludge pump (801) are respectively provided with a second hand valve (804), the collecting pipeline is provided with a check valve (803), and the sludge pump (801) is controlled by an automatic control panel (11).
6. The high-efficiency environment-friendly food processing sewage treatment system according to claim 1, wherein an aeration system is installed at the bottom of the aerobic primary tank (6) and the aerobic secondary tank (7), the aeration system mainly comprises a high-pressure gas pump (602), a gas pipe installation reserved hole (603), a gas pipe hand valve (604), a gas pipe one-way valve (605), a diffusing pipe (606) and a micro diffusing hole (607), the bottom of the aerobic primary tank (6) and the bottom of the aerobic secondary tank (7) are respectively provided with the diffusing pipe (606) in parallel, the diffusing pipe (606) is densely provided with the micro diffusing hole (607), a collecting pipe of the diffusing pipe (606) respectively penetrates through the same side of the bottom of the aerobic primary tank (6) and the bottom of the aerobic secondary tank (7) and is respectively provided with the gas pipe one-way valve (605), the gas outlet pipe hand valve (604) is installed on the high-pressure gas pump (602), the high-pressure gas pump (602) is controlled by an automatic control panel (11).
7. The high-efficiency environment-friendly food processing sewage treatment system according to claim 6, wherein a temperature control plate (601) is respectively installed at one side in the deacidification tank (1), the aerobic primary tank (6) and the aerobic secondary tank (7), the temperature control plate (601) is controlled by an automatic control plate (11), and the automatic control plate (11) is positioned at one side of the deacidification tank (1).
8. An efficient and environment-friendly food processing sewage treatment deacidification method is characterized by comprising the following steps:
s1, removing acid from the food processing fruit acid-containing sewage through the acid removing tank (1), adjusting the pH value to 6.0-6.5, and conveying the food processing fruit acid-containing sewage to the anaerobic tank;
s2, putting activated sludge into the anaerobic tank (5), wherein the activated sludge mainly contains saccharomycetes, the temperature is adjusted to be 28-30 ℃, the oxygen content of sewage is less than or equal to 0.01mg/L, and conveying the incompletely degraded sewage into the aerobic primary tank (6) after the sewage is biodegraded in the anaerobic tank for 5-6 hours;
s3, putting activated sludge into the aerobic primary tank (6), wherein the activated sludge mainly contains saccharomycetes, the temperature is adjusted to be 28-30 ℃, the oxygen content of the sewage is increased to be 4.0-4.5mg/L through an aeration system, and the sewage which is not completely degraded is conveyed into the aerobic secondary tank (7) after the sewage is biologically degraded in the aerobic tank for 5-6 hours;
s4, putting activated sludge into the aerobic secondary tank (7), wherein the activated sludge mainly contains saccharomycetes, the temperature is adjusted to be 28-30 ℃, the oxygen content of sewage is increased to be 4.5-5.0mg/L through an aeration system, and the degraded sewage is conveyed to the sedimentation separation tank (8) after being biodegraded for 5-6 hours through the aerobic secondary tank (7);
s5, after 2.5-3.0h of precipitation separation in the precipitation separation tank (8), the upper layer is conveyed to a secondary precipitation separation tank (9), and the lower layer is pumped into an anaerobic tank (5) to repeat the step S2;
s6, after 3.0-4.0h of precipitation separation in the secondary precipitation separation tank (9), the upper layer is conveyed to the regulating tank (10), and the lower layer is pumped into the anaerobic tank (5) to repeat the step S2;
s7, measuring that the COD of the adjusting tank (10) is less than or equal to 300mg/L, and discharging through a discharge pipe.
9. The efficient and environment-friendly food processing sewage treatment deacidification method according to claim 8, characterized in that: step S1 includes the following steps:
1) adding the food processing fruit acid-containing sewage into an acid removal tank, controlling the amount of the sewage entering the acid removal tank by controlling a solenoid valve through an automatic control panel, and controlling the whole stirring acid removal temperature to be 20-30 ℃ through a temperature control system;
2) calculating the amount of NaHCO3 by using a pH value monitor, slowly adding NaHCO3 powder into the fruit acid-containing sewage, stirring until the pH value monitor shows that the neutralization pH value is 6.0-6.5, and releasing heat during stirring;
3) in the solution with the pH value more than 5.0, most fruit acid molecules are dissociated, the neutralized sewage is continuously stirred for 0.5 to 1 hour to promote the fruit acid to be fully dissociated, and the change of a pH value monitor is observed;
4) adding a small amount of NaHCO3 into the fruit acid-containing sewage, continuously stirring for 0.5-1h, observing the pH value to be 6.0-6.5, pumping the sewage into an anaerobic pool (5) for treatment, and repeating the step 2 if the pH value is not reached.
10. The method for deacidifying by treating the food processing sewage according to the claim 9, wherein the method comprises the following steps: in the step 2), the temperature of the water is changed by heat in the stirring process, and the temperature control plate is heated or cooled according to the detected sewage temperature.
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