CN104118964A - Method for separating active protein in sewage treatment process - Google Patents
Method for separating active protein in sewage treatment process Download PDFInfo
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- CN104118964A CN104118964A CN201410274929.3A CN201410274929A CN104118964A CN 104118964 A CN104118964 A CN 104118964A CN 201410274929 A CN201410274929 A CN 201410274929A CN 104118964 A CN104118964 A CN 104118964A
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Abstract
The invention relates to a method for separating an active protein in a sewage treatment process. The method comprises the following steps: settling sewage in a primary sedimentation tank, settling in a secondary sedimentation tank to obtain sludge after treatment in a regulating reservoir, a UASB reactor and an oxidation pond, and then separating the active protein from the sludge, wherein the separating step comprises the following processes: transferring the sludge to a sludge tank to treat, so as to obtain active protein slurry containing 4.5-5.5% by mass of dry matters, filtering, washing and adjusting the active protein slurry to obtain an active protein material containing 30% by mass of dry matters, then drying the active protein material into the material containing 88-93% of dry matters, and crushing and screening the material by a 200-mesh sieve. By adopting the method, the problem that the active protein in the sludge cannot be fully utilized in the prior art is overcome, the active protein obtained by the method achieves the quality requirements of feed additive protein powder, the additional value of products is increased when the active protein is applied to production of high protein feeds, and the economic benefits of enterprises are increased.
Description
Technical field
The present invention relates to a kind of isolating active proteins, be specifically related to the method for isolating active proteins in a kind of sewage treatment process, belong to activated protein deep processing field.
Background technology
In prior art, the general method of wastewater treatment is: waste water enters high efficiency anaerobic reactor and carries out anaerobic digestion, and in waste water, most of organism is degraded by anaerobion and is converted into the materials such as methane, carbonic acid gas and water.Anaerobic effluent is from flowing into A/O system, in A/O system, residual organic substances is oxidized to carbonic acid gas and water by aerobic microbiological, first ammonia nitrogen is converted into nitric acid and nitrous acid nitrogen in O pond, then is reduced to nitrogen by backflow A pond, thereby ammonia nitrogen and total nitrogen are removed.The water outlet of A/O pond enters qualified discharge after second pond mud-water separation.The precipitating sludge overwhelming majority is back to A/O pond, and excess sludge enters storage basin, dewaters, and the processing of organic fertilizer is carried out in the organic fertilizer production workshop that the mud after dehydration is transported in ecological park.The mud producing in wastewater treatment process in prior art, through concentrated, filtration, make composite fertilizer, its main component is activated protein, and this treatment process has reduced its added value, its value has raising to be developed, the invention provides a kind of its activated protein is separated, purification, the production method of producing active protein feed additive, has improved value of the product.
In the biological treatment process of sewage, produce a large amount of mushrooms, algae, wherein main component is activated protein, in treating processes in the past, this part activated protein is through water treatment plant's anaerobically fermenting, filtration, PAM(polyacrylamide flocculant) precipitation generates sludge-like thing as fertilizer sources and uses for ecological park.And the present invention has reached the specification of quality of feed interpolation protein powder by the activated protein obtaining after separated in sewage treatment process, for the production of high protein feed, improved value-added content of product, increased Business Economic Benefit.
Summary of the invention
The present invention is directed to the problem that in prior art, the activated protein in sewage cannot make full use of, the method for isolating active proteins in a kind of sewage treatment process is provided.
In the process of corn processed production W-Gum, production of corn starch glucose and maltodextrin, glucose production Sunmorl N 60S, produce the sewage that contains the said products, in each production process, the scope of the pH value of discharge is 4-9, before input sewage work through in sodium hydroxide or hydrochloric acid and after the scope of pH value be 6-8.In addition, the mud that does not contain heavy metal, do not contain the sewage of hazardous and noxious substances and adopt sewage water treatment method of the same race to produce of other similar food processing enterprises discharge all can not adopt treatment process of the present invention.
Technical scheme of the present invention is as follows:
A method for isolating active proteins in sewage treatment process, comprises the following steps:
1, in a heavy pond, precipitate
Sewage is imported in a heavy pond, high according to sewage pollution concentration, the feature that settling rate is fast, utilizing natural sedimentation to remove the COD(COD that suspended substance that in water, massfraction is 70-80% and massfraction are 8%-12% is chemical oxygen demand (COD), refer to the amount of oxygen consumed when the oxidized material of energy carries out chemical oxidation in water body, generally the milligram number with every premium on currency oxygen consumed represents, is the basic overall target of water quality monitoring (WQM).）。
2, in equalizing tank, process
Sewage is imported in equalizing tank, regulate the pH value of sewage with soda ash, pH value is 6.5-7.5, is conducive to improve the activity of anaerobic bacterium under this condition; Preferably, pH value is 7.0.
3, (UASB is the english abbreviation of Up-flow Anaerobic Sludge Bed/Blanket to UASB reactor for treatment, it is upflow anaerobic sludge blanket reactor, be a kind of anaerobe method of disposing of sewage, be again upflow anaerobic sludge blanket process, can change anaerobic mud bed reactor into)
Sewage after processing in equalizing tank is entered to reactor by UASB reactor bottom, and sewage upwards flows through Sludge Bed district and contacts with a large amount of anaerobic bacteriums, and it is CH that the organism in sewage resolves into main component by anerobe
4and CO
2biogas, the biogas decompose obtaining, after air chamber is separated, enters biogas cabinet by pipeline, the biogas of biogas cabinet by device for cleaning pipeline to boiler, as fuel combustion, purifying waste water that sewage obtains after UASB reactor for treatment flowed out by reactor head, enters aerobic treatment district.
4, oxidation pond is processed
Purifying waste water of obtaining through UASB reactor for treatment imports in oxidation pond, purify waste water and flow in the filler of oxidation pond, because dissolved oxygen in oxidation pond is sufficient, therefore be relatively suitable for aerobe growth and breeding, in the water of oxidation pond, can keep higher biomass, can effectively improve wastewater purifying efficiency, especially be adapted to the sewage disposal after anaerobism; Preferably, described filler is pencil soft cellulose filler, preferred, 1/3 of the volume that loadings is oxidation pond.
5, in second pond, precipitate
Water after oxidation pond is processed imports in second pond, utilizes natural sedimentation to obtain the mud in the water after oxide treatment; By this step, remove the mud producing through UASB reactor, Aerobic Pond in water, guaranteed the water quality of the water of outflow.
6, the activated protein in the mud obtaining in step 5 is carried out to separation
(1) mud obtaining in step 5 is transferred in sludge sump, through adding water, stirring, obtain the mud suspension liquid that moisture massfraction is 76%-85%, then sedimentation 25-40 minute, wherein mushroom, algae isoreactivity albumen can swim in liquid level upper strata, get sludge sump upper materials, obtain activated protein slurry, the massfraction that contains dry-matter in activated protein slurry is 4.5%-5.5%; Preferably, the settling time is 30 minutes.
(2) activated protein slurry step (1) being obtained, is delivered to folding band filter and filters, the material that the massfraction that acquisition contains dry is 9.5%-10.5%.
(3) material step (2) being obtained is delivered to washing tank through auger, adds water in washing tank, stirs, and making after material dilution the wherein massfraction of dry is 3.9%-4.2%.
(4) material step (3) being obtained through pump delivery to equalizing tank, whipping appts is installed in equalizing tank, through stirring, mixing of materials is even, through pump delivery, to chamber-type press filter, concentrate, filter, the activated protein material that acquisition is 28%-36% containing amount of dry matter mark.
Chamber-type press filter is similar to diaphragm filter press work principle of filter, the principle of work of chamber-type press filter is for when pressure filter is worked, all filter plates are pressed on to movable head plate and fixedly between tailgate, making to form between adjacent filter plate is the filter chamber of sealing around, ore pulp is fed by the fixing plup inlet of tailgate.At all filter chambers, be full of after ore pulp, pressure-filtering process starts, and the pressure that ore pulp feeds ore pulp by feeding pump carries out solid-liquid separation.Solid particulate is because stopping of filter cloth stays in filter chamber, and filtrate is discharged along the drain gutter on filter plate through filter cloth, when filtrate is no longer flowed out, completes dehydration.Now, can stop feed, a plate is returned to original position, filter plate running gear pulls open filter plate in succession, and filter cake relies on deadweight to come off, and so far, has completed pressure-filtering process.
(5) mass transport step (4) being obtained, to pipe bundle drier, obtains and contains the material that dry biomass mark is 88%-93%.
(6) mass transport to pulverizer step (5) being obtained is pulverized, and through 200 mesh sieves screenings, obtains the activated protein after separated.
The present invention also comprises the composition that contains the activated protein of preparing by the inventive method.
By the method for isolating active proteins in sewage treatment process of the present invention, improved the utility value of activated protein, the separated activated protein obtaining can be used for producing high protein feed, to improve added value of product, increases Business Economic Benefit.In sewage, the main component of activated protein is as shown in table 1 for example:
Table 1
Embodiment
Below in conjunction with specific embodiment, further describe the present invention, advantage and disadvantage of the present invention will be more clear along with description.But embodiment is only exemplary, scope of the present invention is not formed to any restriction.It will be understood by those skilled in the art that lower without departing from the spirit and scope of the present invention and can the details of technical solution of the present invention and form be modified or be replaced, but these modifications and replacement all fall within the scope of protection of the present invention.
The method of isolating active proteins in 1 one kinds of sewage treatment process of embodiment, comprises the following steps:
1, in a heavy pond, precipitate
Sewage is imported in a heavy pond, and high according to sewage pollution concentration, the feature that settling rate is fast, utilizes natural sedimentation to remove the COD that suspended substance that in water, massfraction is 70-80% and massfraction are 8%-12%.
2, in equalizing tank, process
Sewage is imported in equalizing tank, regulate the pH value of sewage with soda ash, pH value is 7.0, is conducive to improve the activity of anaerobic bacterium under this condition.
3, UASB reactor for treatment
Sewage after processing in equalizing tank is entered to reactor by UASB reactor bottom, and sewage upwards flows through Sludge Bed district and contacts with a large amount of anaerobic bacteriums, and it is CH that the organism in sewage resolves into main component by anerobe
4and CO
2biogas, the biogas decompose obtaining, after air chamber is separated, enters biogas cabinet by pipeline, the biogas of biogas cabinet by device for cleaning pipeline to boiler, as fuel combustion, purifying waste water that sewage obtains after UASB reactor for treatment flowed out by reactor head, enters aerobic treatment district.
4, oxidation pond is processed
Purifying waste water of obtaining through UASB reactor for treatment imports in oxidation pond, purify waste water and flow in the filler of oxidation pond, because dissolved oxygen in oxidation pond is sufficient, therefore be relatively suitable for aerobe growth and breeding, in the water of oxidation pond, can keep higher biomass, can effectively improve wastewater purifying efficiency, especially be adapted to the sewage disposal after anaerobism, described filler is pencil soft cellulose filler, 1/3 of the volume that loadings is oxidation pond.
5, in second pond, precipitate
Water after oxidation pond is processed imports in second pond, utilizes natural sedimentation to obtain the mud in the water after oxide treatment; By this step, remove the mud producing through UASB reactor, Aerobic Pond in water, guaranteed the water quality of the water of outflow.
6, the activated protein in the mud obtaining in step 5 is carried out to separation
(1) mud obtaining in step 5 is transferred in sludge sump, through adding water, stirring, obtain the mud suspension liquid that moisture massfraction is 80%, then sedimentation is 30 minutes, wherein mushroom, algae isoreactivity albumen can swim in liquid level upper strata, get sludge sump upper materials, obtain activated protein slurry, the massfraction that contains dry-matter in activated protein slurry is 5%.
(2) activated protein slurry step (1) being obtained, is delivered to folding band filter and filters, and obtaining the massfraction that contains dry is the material of 10% left and right.
(3) material step (2) being obtained is delivered to washing tank through auger, adds water in washing tank, stirs, and making after material dilution the wherein massfraction of dry is 4%.
(4) material step (3) being obtained through pump delivery to equalizing tank, whipping appts is installed in equalizing tank, through stirring, mixing of materials is even, through pump delivery, to chamber-type press filter, concentrate, filter, the activated protein material that acquisition is 30% containing amount of dry matter mark.
(5) mass transport step (4) being obtained, to pipe bundle drier, obtains that to contain dry biomass mark be 90% material.
(6) mass transport to pulverizer step (5) being obtained is pulverized, and through 200 mesh sieves screenings, obtains the activated protein after separated.
The method of isolating active proteins in 2 one kinds of sewage treatment process of embodiment
Activated protein in the mud obtaining in embodiment 1 step 5 is carried out to separation:
(1) get the mud 500g obtaining in step 5 is transferred in beaker, through adding water 500g, stirring 3 minutes, obtain the mud suspension liquid that moisture massfraction is 80%, then sedimentation is 30 minutes, wherein mushroom, algae isoreactivity albumen can swim in liquid level upper strata, get sludge sump upper materials, obtain activated protein slurry 720g, the massfraction that contains dry-matter in activated protein slurry is 5.2%.
(2) activated protein slurry step (1) being obtained, with filter paper filtering, obtains that to contain amount of dry matter mark be 10.3% material 363.5g.
(3) material step (2) being obtained is put into beaker, at beaker, adds water, stirs, and obtains material 913.2g, and the massfraction of dry is 4.1%.
(4) material hand operated mixing step (3) being obtained 3 minutes, through filter paper filtering, obtains and contains the activated protein material 106.4g that amount of dry matter mark is 35.2%.
(5), in mass transport constant temperature oven step (4) being obtained, obtain that to contain dry biomass mark be 90.1% material 40.6g.
(6) material step (5) being obtained is delivered to mill and is ground, and through 200 mesh sieves screenings, obtains the activated protein 32.4g after separated.
The activated protein of 1 pair of separation of the present invention of test example detects, and result is as shown in table 2:
Table 2
Table 2 shows: the activated protein by separation of the present invention meets " protein powder quality standard (one-level) for feed " target level of product quality completely.
In addition, the present invention has brought larger economic benefit to enterprise, is analyzed as follows:
1 product income: daily output over dry activated protein 15T, close commodity active protein powder 16.67T, price per ton in 1400 yuan/T(with feed), 23333.33 yuan of day product sales revenue;
2 manually drop into: with per tour, drop into artificial 5 people, need altogether 15 people, per capita salary is in 3200 yuan, and a day labour cost is 1600 yuan;
3 steam consumptions: day steam consumption=(15 ÷ 30%-15 ÷ 90%) * 1.4=46.67T, 100 yuan/T of steam price, steam expense is 4667 yuan;
4 electricity expenses are used: with unit product power consumption 100 degree, calculate, and day power consumption 1667 degree, 0.62 yuan/degree of the electricity charge, the electricity charge are 1033.54 yuan;
5 Packing Fees: packing specifications 50kg/ bag, packing bag is 334 day by day, 0.69 yuan of every price, packing bag expense is 230.46 yuan;
6 depreciation of fixed assets expenses: this project investment budget is 3,230,000 yuan, the equipment that reuses is in 500,000 yuan, and fixed capital total value is 3,730,000 yuan, and average daily amount of depreciation is 1036 yuan;
7 upkeep costs: in 5 yuan/T, upkeep cost is 83.35 yuan day by day.
Day benefit:
23333.33-1600-4667-1033.54-230.46-1036-83.35=14682.98 first.
Claims (8)
1. a method for isolating active proteins in sewage treatment process, is characterized in that, comprises the following steps:
In (1) one heavy pond, precipitate
Sewage is imported in a heavy pond, utilize natural sedimentation to remove the COD that suspended substance that in water, massfraction is 70-80% and massfraction are 8%-12%;
(2) in equalizing tank, process
Sewage is imported in equalizing tank, regulate the pH value of sewage with soda ash, pH value is 6.5-7.5;
(3) UASB reactor for treatment
Sewage after processing in equalizing tank is entered to reactor by UASB reactor bottom, and sewage upwards flows through Sludge Bed district and contacts with anaerobic bacterium, and it is CH that the organism in sewage resolves into main component by anerobe
4and CO
2biogas, the biogas decompose obtaining, after air chamber is separated, enters biogas cabinet by pipeline, the biogas of biogas cabinet by device for cleaning pipeline to boiler, as fuel combustion, purifying waste water that sewage obtains after UASB reactor for treatment flowed out by reactor head, enters aerobic treatment district;
(4) oxidation pond is processed
Purifying waste water of obtaining through UASB reactor for treatment imports in oxidation pond, purifies waste water and flows in the filler of oxidation pond;
(5) in second pond, precipitate
Water after oxidation pond is processed imports in second pond, utilizes natural sedimentation to obtain the mud in the water after oxide treatment;
(6) activated protein in the mud obtaining in step (5) is carried out to separation
1. the mud obtaining in step (5) is transferred in sludge sump, through adding water, stirring, obtain the mud suspension liquid that moisture massfraction is 76%-85%, then sedimentation 25-40 minute, get sludge sump upper materials, obtain activated protein slurry, the massfraction that contains dry-matter in activated protein slurry is 4.5%-5.5%;
2. the activated protein slurry 1. step being obtained, is delivered to folding band filter and filters, the material that the massfraction that acquisition contains dry is 9.5%-10.5%;
3. the material that 2. step obtained is delivered to washing tank through auger, adds water in washing tank, stirs, and making after material dilution the wherein massfraction of dry is 3.9%-4.2%;
4. the material 3. step being obtained to equalizing tank, is provided with whipping appts through pump delivery in equalizing tank, through stirring, mixing of materials is even, through pump delivery, to chamber-type press filter, concentrates, filters, the activated protein material that acquisition is 28%-36% containing amount of dry matter mark;
5. the mass transport 4. step being obtained, to pipe bundle drier, obtains and contains the material that dry biomass mark is 88%-93%;
6. the mass transport 5. step being obtained to pulverizer is pulverized, and through 200 mesh sieves screenings, obtains the activated protein after separated.
2. method according to claim 1, is characterized in that, step imports sewage in equalizing tank in (2), regulates the pH value of sewage with soda ash, and pH value is 7.0.
3. method according to claim 1, is characterized in that, described in step (4), filler is pencil soft cellulose filler.
4. method according to claim 3, is characterized in that, 1/3 of the volume that described in step (4), the loadings of filler is oxidation pond.
5. method according to claim 1, is characterized in that, step is transferred to the mud of acquisition in sludge sump in 1., through adding water, stirring, obtains moisture massfraction and be 80% mud suspension liquid, and then sedimentation is 30 minutes.
6. the activated protein of the method separation as described in claim 1-4 any one.
7. a high protein composition, is characterized in that, contains activated protein as claimed in claim 6 and acceptable auxiliary agent.
8. the application of activated protein as claimed in claim 5 in preparing high protein feed.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369445A (en) * | 2002-03-22 | 2002-09-18 | 邵胜学 | Process for treating sewage to generate active mud and extract protein |
| JP2009144076A (en) * | 2007-12-14 | 2009-07-02 | Harashima Tomoko | Process for producing liquid fuel |
| CN101591130A (en) * | 2008-05-29 | 2009-12-02 | 刘文治 | The treatment process of the whole recycling and zero discharges of active sludge |
| CN102249498A (en) * | 2011-07-13 | 2011-11-23 | 华北水利水电学院 | Biochemical treatment method for waste water from small and medium-sized starch factories |
| CN102874974A (en) * | 2011-07-15 | 2013-01-16 | 天津市裕川置业集团有限公司 | Advanced treatment and comprehensive utilization process for sewage and sludge in sewage treatment plant |
-
2014
- 2014-06-19 CN CN201410274929.3A patent/CN104118964B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369445A (en) * | 2002-03-22 | 2002-09-18 | 邵胜学 | Process for treating sewage to generate active mud and extract protein |
| JP2009144076A (en) * | 2007-12-14 | 2009-07-02 | Harashima Tomoko | Process for producing liquid fuel |
| CN101591130A (en) * | 2008-05-29 | 2009-12-02 | 刘文治 | The treatment process of the whole recycling and zero discharges of active sludge |
| CN102249498A (en) * | 2011-07-13 | 2011-11-23 | 华北水利水电学院 | Biochemical treatment method for waste water from small and medium-sized starch factories |
| CN102874974A (en) * | 2011-07-15 | 2013-01-16 | 天津市裕川置业集团有限公司 | Advanced treatment and comprehensive utilization process for sewage and sludge in sewage treatment plant |
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Denomination of invention: A method for separating active protein in sewage treatment process Effective date of registration: 20211221 Granted publication date: 20160302 Pledgee: China Construction Bank Corporation Zouping sub branch Pledgor: SHANDONG XIWANG SUGAR INDUSTRY Co.,Ltd. Registration number: Y2021980015836 |
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