CN103570177A - Purification treatment process for saliferous pickling wastewater in food industry - Google Patents
Purification treatment process for saliferous pickling wastewater in food industry Download PDFInfo
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- CN103570177A CN103570177A CN201310552875.8A CN201310552875A CN103570177A CN 103570177 A CN103570177 A CN 103570177A CN 201310552875 A CN201310552875 A CN 201310552875A CN 103570177 A CN103570177 A CN 103570177A
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Abstract
The invention relates to a purification treatment process for saliferous pickling wastewater in the food industry. The purification treatment process comprises the following steps: (1) filtering and removing large-particle solid impurities out of the saliferous pickling wastewater; (2) heating so that proteins in the wastewater generate degenerated flocculation; (3) carrying out centrifugal separation to remove flocculates; (4) carrying out adsorptive separation by using a food processing aid activated carbon to remove micromolecular impurities; and (5) filtering and removing the activated carbon. The treatment process can be used for effectively removing the proteins, blood, hair, ground meat, ground bone, fat and other impurities out of the saliferous pickling wastewater and greatly reducing the emission of the saliferous pickling wastewater in the food processing industry and is beneficial to the increment of economic and social benefits of enterprises.
Description
Technical field
The present invention relates to the purification process technique of the high saliferous pickling waste water of a kind of food service industry, realize the recycle of saliferous pickling waste water, belong to food service industry field of waste water treatment.
Background technology
In food service industry, with salt, livestock and poultry meat product is pickled, making product is a comparatively conventional technological process with flavour.Produce thus a considerable amount of high saliferous pickling waste waters, the impurity such as the protein that contains salt (sodium-chlor) and stripping from livestock and poultry meat, blood, fat, are very unmanageable food industrial wastewaters.Principal feature of the present invention is by after brine waste purifying treatment, removes the impurity in salt solution, and after the purification obtaining, salt solution can be re-used in pickling process.Reduce significantly thus the discharge of wastewater of food processing plant and the work that the follow-up three wastes are processed, contributed to improve economic benefit and the social benefit of enterprise.
The protein, blood, hair, meat mincing, broken bone, the fat that in livestock and poultry meat pickling brine, mainly contain stripping in sodium-chlor, meat, the impurity such as all kinds of small molecular weight impurities, the main purpose of purifying treatment is the above-mentioned impurity of removing in salt solution.
Summary of the invention
The object of the present invention is to provide a kind of purification process technique of food service industry saliferous pickling waste water, can effectively remove the impurity such as protein, blood fat, hair, meat mincing, broken bone and fat in waste water, and can significantly reduce the saliferous pickling waste water discharge of food-processing industry, contribute to improve the economic and social benefit of enterprise.
The present invention is achieved by the following technical solutions:
A purification process technique for food service industry saliferous pickling waste water, comprises the following steps:
(1) filter the macrobead solid impurity of removing in saliferous pickling waste water;
(2) heating impels the protein generation sex change flocculation in waste water;
(3) throw out is removed in centrifugation;
(4) by Activated Carbon Adsorption Separation, remove small molecular weight impurity;
(5) filter and remove gac;
Wherein,
Preferably, in the described saliferous pickling waste water of step (1), sodium chloride content is greater than 10wt%, is preferably 15～25wt%.
Preferably, in step (1), 80～100 object filter screens are selected in described filtration.
Preferably, in step (2), before heating, add foodstuff additive grade hydrochloric acid and regulate pH to 3.4～5.0, be preferably 4.5.
Preferably, in step (2), Heating temperature is 95～99 ℃; The time of heating is 5～10 minutes.
Preferably, in step (3), select horizontal spiral centrifuge, disc centrifuge or tubular-bowl centrifuge to carry out centrifugation; Described horizontal spiral centrifuge rotary drum rotating speed is at 2300～2700r/min, the poor rotating speed 30～70r/min of spiral; The rotary drum rotating speed of disc centrifuge is at 3000～6000r/min; The rotary drum rotating speed of tubular-bowl centrifuge is at 9000～16000r/min.
Preferably, in step (4), before adding gac, use foodstuff additive sodium hydroxide that pH is adjusted to 6.8～7.2, be preferably 7.0.
Preferably, in step (4), add the granulated active carbon of waste water total amount 0.5～5wt% left and right in saliferous pickling waste water, at 30～90 ℃ of temperature, whip attachment is about 1～6 hour; Preferably, the granulated active carbon that adds waste water total amount 1～3% left and right in saliferous pickling waste water.
Preferably, the particle diameter of described granulated active carbon is 0.1～5mm, is preferably 0.5～1mm.
Preferably, in step (5), the aperture of described filtration openings is 0.2～8 micron, is preferably 3～8 microns.
Technique effect of the present invention and advantage are:
In food service industry, with salt, food raw material is pickled, to extend shelf life of products, the local flavor that increases product is a conventional process.But pickling process can produce a large amount of brine wastes, this brine waste often contains the sodium-chlor of high density, the impurity such as protein, fat, minced meat that simultaneously also contains stripping from food raw material, the ability that these impurity lose pickling liquid to continue to pickle, must discharge and renew.Because pickling liquid contains high density chlorination sodium, conventional purification of waste water at present can not directly be processed, need a large amount of fresh water to dilute pickling liquid, reduce in waste liquid after sodium chloride content, just can enter waste water purification system processes, this treatment process has increased considerably the workload of Waste Water Treatment, and causes the serious waste of water resources.
The present invention is directed to the characteristic of food service industry saliferous pickling waste water impurity, comprehensively adopted protein to add heat setting wadding, centrifugal removal flocculation material, and adopted the process meanses such as charcoal absorption small molecular weight impurity, can access pickling liquid after the purification that can reuse.Due to the requirement of food safety, with the material of Food Contact, or to add material in food must be all the safe material through national correlation department license.Feature of the present invention has been avoided conventionally in decontamination process, adding such as chemical such as solidifying wadding agent, but adopts the way that adds heat setting wadding.And adopting the method for food processing aid charcoal absorption to remove small molecular weight impurity, the last microfiltration method that only need to adopt is removed gac, has avoided adopting ultrafiltration, nanofiltration method to remove the higher technological process of cost of small-molecule substance.Due to the ripe process means that is of the present invention's employing, and do not use chemical substance, make the present invention there is good operability and economic worth, be easy to accept into food processing enterprises.
The Food Industry Wastewater that food service industry saliferous pickling liquid is different and conventional, waste liquid contains quite high salt, and its osmotic pressure and ionic strength are quite high, and it is conventional that method of wastewater treatment---activated sludge process can not directly be processed.Because the ionic strength of saliferous pickling waste water is higher, the method that ultrafiltration and concentration method reclaims sodium-chlor is also not suitable for using, and can shorten dramatically the work-ing life of filter membrane, causes operation cost to increase severely.Therefore present method is specially adapted to the processing recycling of the food service industry pickling waste water of supersalinity (more than 10%).
Adopt after this treatment process, can remove the impurity in salt bearing liquid wastes on the one hand, retained the salt in pickling liquid (sodium-chlor), after purifying treatment, the concentration of pickling liquid salt does not change substantially, therefore the pickling liquid after purifying treatment can be reused for and pickle workshop section, reduce the consumption of enterprise's edible salt (sodium-chlor), reduced the expenditure of raw materials cost, realized recycle; Reduce significantly on the other hand the quantity discharged that food enterprise is pickled workshop section's salt bearing liquid wastes, there is significant social benefit.
Accompanying drawing explanation
The purification process technique schema of a kind of food service industry saliferous of Fig. 1 pickling waste water
Embodiment
By specific specific examples, technical scheme of the present invention is described below.Should be understood that one or more method stepss that the present invention mentions do not repel between the step that also has additive method step or clearly mention at these before and after described combination step can also insert additive method step; Should also be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.And, except as otherwise noted, the numbering of various method steps is only for differentiating the convenient tool of various method steps, but not for limiting the ordering of various method steps or limiting the enforceable scope of the present invention, the change of its relativeness or adjustment, without essence change technology contents in the situation that, when being also considered as the enforceable category of the present invention.
Embodiment 1
The saliferous pickling waste water of processing poultry products production enterprise, contains 23wt% sodium-chlor.
1, waste water filters through 100 eye mesh screens, removes the impurity such as meat mincing, broken bone, fat lump, hair;
2, the pH value to 4.5 of adjusting waste water with food grade hydrochloric acid, heated and boiled (95～99 ℃), keeps 5 minutes;
3, then with horizontal screw centrifugal separating machine, isolate the impurity such as protein grumeleuse, horizontal spiral centrifuge rotary drum rotating speed 2500r/min, the poor rotating speed 50r/min of spiral;
4, in the waste liquid of clarification, with food grade sodium hydroxide, adjust pH to 7.0; In the waste water after separation, add waste water total amount 1.5wt%, particle diameter at the granular adsorption gac of 0.5～1mm, at 30 ℃, stir 4 hours;
5, with 8 microns of millipore filters, filter and remove gac, finally obtain being equivalent to the clear common salt aqueous solution of 85% former waste liquid weight, saltiness is about 23wt%, is the original saltiness of waste liquid substantially, can be recycled and reused for and pickle workshop section.
Embodiment 2
The saliferous pickling waste water of processing poultry meat product manufacturing enterprise, contains 15wt% sodium-chlor.
1, waste water filters through 80 orders, removes the impurity such as meat mincing, broken bone, fat lump, hair;
2, waste water heated and boiled, keeps 5 minutes;
3, then waste water is isolated the impurity such as protein grumeleuse, tubular-bowl centrifuge rotary drum rotating speed 11000r/min with tubular type separating centrifuge;
4, in the waste water after separation, add 4.0wt%, 0.5-1mm granular adsorption gac, at 60 ℃, whip attachment is 2 hours;
5, with 3 microns of millipore filters, filter and remove gac, finally obtain being equivalent to the clear common salt aqueous solution of 80% former waste liquid weight, saltiness 15wt%, can be recycled and reused for and pickle workshop section.
Embodiment 3
The saliferous pickling waste water of processing fishery products manufacturing enterprise, contains 18wt% sodium-chlor.
1, waste water filters through 80 eye mesh screens, removes chip;
2, the pH value to 4.5 of adjusting waste water with food grade hydrochloric acid, heated and boiled, keeps 10 minutes;
3, then with disc-type separating centrifuge, isolate the impurity such as protein grumeleuse, the rotary drum rotating speed of disc centrifuge is at 4000r/min;
4, in the waste liquid of clarification, with food grade sodium hydroxide, adjust pH to 7.0; In the waste water after separation, add waste water total amount 2.0wt%, 3～5mm granular adsorption gac, at 80 ℃, stir 2.5 hours;
5, with 8 microns of millipore filters, filter and remove gac, finally obtain being equivalent to the clear common salt aqueous solution of 90% former waste liquid weight, saltiness is about 18wt%, can be recycled and reused for and pickle workshop section.
Claims (11)
1. a purification process technique for food service industry saliferous pickling waste water, comprises the following steps:
(1) filter the macrobead solid impurity of removing in saliferous pickling waste water;
(2) heating impels the protein generation sex change flocculation in waste water;
(3) throw out is removed in centrifugation;
(4) by Activated Carbon Adsorption Separation, remove small molecular weight impurity;
(5) filter and remove gac.
2. purification process technique as claimed in claim 1, is characterized in that, in step (1), 80～100 object filter screens are selected in described filtration.
3. purification process technique as claimed in claim 1, is characterized in that, in step (1), in described saliferous pickling waste water, sodium chloride content is greater than 10wt%.
4. purification process technique as claimed in claim 1, is characterized in that, in step (2), before heating, adds foodstuff additive grade hydrochloric acid and regulates pH to 3.4～5.0.
5. purification process technique as claimed in claim 1, is characterized in that, in step (2), Heating temperature is 95～99 ℃; The time of heating is 5～10 minutes.
6. purification process technique as claimed in claim 1, is characterized in that, in step (3), selects horizontal spiral centrifuge, disc centrifuge or tubular-bowl centrifuge to carry out centrifugation.
7. purification process technique as claimed in claim 6, is characterized in that, described horizontal spiral centrifuge rotary drum rotating speed is at 2300～2700r/min, the poor rotating speed 30～70r/min of spiral; The rotary drum rotating speed of disc centrifuge is at 3000～6000r/min; The rotary drum rotating speed of tubular-bowl centrifuge is at 9000～16000r/min.
8. purification process technique as claimed in claim 1, is characterized in that, in step (4), before adding gac, uses foodstuff additive sodium hydroxide that pH is adjusted to 6.8～7.2.
9. purification process technique as claimed in claim 1, is characterized in that, in step (4), adds the granulated active carbon of total amount 0.5～5wt% in saliferous pickling waste water, and at 30～90 ℃ of temperature, whip attachment is 1～6 hour; The particle diameter of described granulated active carbon is 0.1～5mm.
10. purification process technique as claimed in claim 1, is characterized in that, in step (5), the aperture of described filtration openings is 0.2～8 micron.
11. as the purposes of the application of the purification process technique as described in arbitrary in claim 1-10 in the purifying treatment of food service industry saliferous pickling waste water.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106219851A (en) * | 2016-08-24 | 2016-12-14 | 徐金蝶 | A kind of method of pickling waste water reuse |
| CN108002609A (en) * | 2017-10-20 | 2018-05-08 | 杭州市农业科学研究院 | Salted egg salting feed liquid recycles and its method for cyclic process salted egg |
| CN109111043A (en) * | 2018-09-16 | 2019-01-01 | 毛强平 | A kind of processing method of high-COD waste water with high salt |
| CN109879515A (en) * | 2016-07-27 | 2019-06-14 | 张作玮 | A kind of processing method of meat processing waste water |
| CN111838735A (en) * | 2020-08-17 | 2020-10-30 | 诸暨市浩仁机械科技有限公司 | Food processing is with pickling preparation facilities |
| CN112321050A (en) * | 2020-10-24 | 2021-02-05 | 巢湖美维食品有限公司 | Processing apparatus is used in waste water desalination of food factory |
| CN112340871A (en) * | 2021-01-11 | 2021-02-09 | 烟台雅米宠物食品有限公司 | Waste water filtering and purifying device for pet food processing |
| CN112830619A (en) * | 2021-02-20 | 2021-05-25 | 重庆合得拢食品有限公司 | Brine purification device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109879515A (en) * | 2016-07-27 | 2019-06-14 | 张作玮 | A kind of processing method of meat processing waste water |
| CN106219851A (en) * | 2016-08-24 | 2016-12-14 | 徐金蝶 | A kind of method of pickling waste water reuse |
| CN108002609A (en) * | 2017-10-20 | 2018-05-08 | 杭州市农业科学研究院 | Salted egg salting feed liquid recycles and its method for cyclic process salted egg |
| CN108002609B (en) * | 2017-10-20 | 2020-10-30 | 杭州市农业科学研究院 | Method for recovering salted egg pickling feed liquid and circularly processing salted eggs |
| CN109111043A (en) * | 2018-09-16 | 2019-01-01 | 毛强平 | A kind of processing method of high-COD waste water with high salt |
| CN109111043B (en) * | 2018-09-16 | 2021-11-09 | 苏州渭中科技发展有限公司 | Treatment method of high-salt high-COD wastewater |
| CN111838735A (en) * | 2020-08-17 | 2020-10-30 | 诸暨市浩仁机械科技有限公司 | Food processing is with pickling preparation facilities |
| CN111838735B (en) * | 2020-08-17 | 2022-06-07 | 湖南味到舌足食品有限公司 | Food processing is with pickling preparation facilities |
| CN112321050A (en) * | 2020-10-24 | 2021-02-05 | 巢湖美维食品有限公司 | Processing apparatus is used in waste water desalination of food factory |
| CN112340871A (en) * | 2021-01-11 | 2021-02-09 | 烟台雅米宠物食品有限公司 | Waste water filtering and purifying device for pet food processing |
| CN112340871B (en) * | 2021-01-11 | 2021-04-20 | 烟台雅米宠物食品有限公司 | Waste water filtering and purifying device for pet food processing |
| CN112830619A (en) * | 2021-02-20 | 2021-05-25 | 重庆合得拢食品有限公司 | Brine purification device |
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