CN102583835A - Closed-cycle circulating process for governing biogas slurry fermented through wastewater from pig farms - Google Patents
Closed-cycle circulating process for governing biogas slurry fermented through wastewater from pig farms Download PDFInfo
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- CN102583835A CN102583835A CN2012100642610A CN201210064261A CN102583835A CN 102583835 A CN102583835 A CN 102583835A CN 2012100642610 A CN2012100642610 A CN 2012100642610A CN 201210064261 A CN201210064261 A CN 201210064261A CN 102583835 A CN102583835 A CN 102583835A
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Abstract
The invention relates to a closed-cycle circulating process for governing biogas slurry fermented through wastewater from pig farms, which specially includes steps of: firstly removing thallus in biogas slurry sewage to obtain mycoprotein and degerming mother solution; concentrating and crystallizing the degerming mother solution to obtain condensate water and crystallized crystal mush, separating the crystallized crystal mush in centrifugal mode to obtain crystal salts and crystal mother solution; performing spray drying on a part of the crystallized mother solution to produce organic mixed fertilizers, and leading the other part of the crystallized mother solution to flow back to a biogas slurry high sewage equalizing pond, wherein a substance flowing main body forms a closed-cycle circulating loop. The closed-cycle circulating process solves the problem of serve pollution to the environment caused by discharging of biogas slurry fermented through wastewater from pig farms and simultaneously obtains products of mycoproteins, crystallized salts, organic mixed fertilizers and the like, evaporation condensing water in concentration can be used as production water of the pig farms.
Description
Technical field
The invention belongs to field of environment engineering and changing waste into resources technical field, be specifically related to a kind of close circulation technology of the fermentation natural pond liquid high-concentration waste water of raising pigs.
Background technology
Since the sixties in 20th century, China's livestock and poultry breeding industry is progressively developed into the mainstay industry of relatively independent rural economy by agricultural sideline occupations, the fast development of scale animal and poultry cultivation industry, and average annual amplification is near 10%.Yet expansion along with the livestock and poultry farm scale; The discharging of plant's ight soil is tending towards concentrated; The serious environmental carrying capacity that surpasses the locality brings huge pressure for the productive life environment of surrounding resident, makes the pollution problem of plant's ight soil also become the focus that people pay close attention to day by day.The main processing mode through anaerobion degradation treatment high concentrated organic wastewater of at present a large amount of feces of livestock and poultry is a biogas engineering; The a large amount of natural ponds liquid that forms is because of transporting reasons such as inconvenience, processing cost; Cause most of natural pond liquid directly to enter environment, cause nitric nitrogen concentration in environment water eutrophication, the underground water to increase and regional soil eutrophication etc.Therefore, how rationally to handle natural pond liquid, make its resource utilization, become the hot issue that numerous experts and scholars and governments at all levels' emphasis are inquired into.
At present, though both at home and abroad to natural pond liquid through nature handle, the conventional terminal methods of handling such as aerobic, anaerobism and anaerobic-aerobic facture realize its emission standard, have the big running cost height of investment, and do not produce problem such as any economic benefit.Simultaneously; Natural pond liquid contains life active compounds such as nutritions such as abundant organic matter, humic acid, nitrogen, phosphorus, potassium, trace element and amino acid, VITAMINs, enzyme; Can be used as high-quality and efficient organic fertilizer, like products such as natural pond liquid development novel aq fertilizer, novel agrochemical, novel growth regulator and fodder additives, the physics and chemistry structure that can improve the soil significantly; Also but the enhancing crop resistance reduces and pollutes.But; Liquid direct utilization in natural pond also exists following problem to need to be resolved hurrily: (1) for a long time; Because the factors such as cost, transportation, effect of utilizing of natural pond liquid cause natural pond liquid not obtain scientific and rational utilization, therefore easily environment is also caused secondary pollution easily; (2) natural pond liquid contains heavy metal and some other objectionable impurities, and this brings very big difficulty for the comprehensive utilization of natural pond liquid, therefore is badly in need of strengthening the research of natural pond liquid security, uses widely to promote natural pond liquid; (3) lack communication and cooperation between plant husbandry and the aquaculture and the breeding imbalance of existence, problems such as fertilising seasonality and natural pond liquid continuity have also caused natural pond liquid not utilize fully.In sum, owing to lack enough research and understanding, the potentiality that cause natural pond liquid to utilize do not have fully to be excavated.Therefore, how preventing and remedying pollution, improve productivity effect, reduce production costs, increase benefit, is the severe problem that faces in present China natural pond liquid resource utilization process.
Summary of the invention
The object of the present invention is to provide a kind of simple to operate, less investment, running cost low; Not only can realize wastewater zero discharge, and be a kind of can comprehensive utilization ratio high, close circulation technology that fermentation natural pond liquid high-concentration waste water is raised pigs in ecological effect improvement good, good economy performance.
The raise pigs close circulation technology of fermentation natural pond liquid high-concentration waste water of the improvement that the present invention proposes, concrete steps are following:
(1) natural pond liquid waste water is joined in the equalizing tank, add the crystalline mother solution that refluxes in the equalizing tank simultaneously, heat flocculation-filtration method is removed the zymophyte in the liquid waste water of natural pond, obtains tropina and removes mother bacterial liquid;
(2) remove mother bacterial liquid and concentrate, obtain condensed water and crystallization magma;
(3) the crystallization magma is delivered to spinning in the demineralizer, obtains crystal salt and crystalline mother solution;
(4) take out partial crystallization mother liquor spraying drying and produce compoiste fertilizer, all the other crystalline mother solutions are back to the natural pond liquid high-concentration waste water equalizing tank of raising pigs, and make logistics agent constitute the closed cycle circle.And the like, logistics agent is realized infinite loop.
Among the present invention, in the flocculation-filtration method of heat described in the step (1), controlled temperature is 80-120 ℃, and soaking time is 2-25 minute, and adds cellulosic flocculating aids after-filtration zymophyte.
Among the present invention, removing the mother bacterial liquid cycles of concentration in the step (2) is 2-8 times.
Among the present invention, can add sulfuric acid or sodium sulfate during the spinning of crystallization magma in the step (3), controlled temperature 20-120 ℃, pH value is that crystallization removes vitriol under the 4.0-8.0.
The present invention has eliminated the severe contamination that the natural pond liquid high-concentration wastewater emission of raising pigs causes environment, has obtained three products such as tropina, crystal salt, compoiste fertilizer simultaneously, and the evaporation condensed water in concentrating can be used as the pig farm water of productive use again and obtains utilizing.
Because the present invention has realized the infinite loop of logistics agent and recycling of evaporation condensed water; Make the material in the waste water obtain sufficient extraction as producing product, therefore first advantage of the present invention is the environmental improvement problem that has solved natural pond, fermentation back liquid high-concentration waste water more up hill and dale; Second advantage is that nutritive elements such as the tropina that was refuse originally, heavy metal, nitrogen phosphorus have been carried out effective separation; Become the three big products that economic worth is arranged; The recycling not only water saving but also practiced thrift the heating heat of the evaporation condensed water of heat, thereby good economy performance.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with relevant devices the present invention is further set forth:
At first, the crystalline mother solution that in equalizing tank, add to reflux is heated to 110 ℃ with natural pond liquid waste water and stopped 5 minutes, adds cellulosic flocculating aids Plate Filtration after the flocculation of biogas fermentation bacterium or removes with additive method; Then, remove mother bacterial liquid and in thickener, concentrate doubly also crystallization of 2-8, obtain water of condensation and crystallization magma; The crystallization magma is delivered to and is added sulfuric acid or sodium sulfate (also can not adding) in the demineralizer, 20-120 ℃ again spinning obtain crystal salt and crystalline mother solution; At last, the spray-dried production compoiste fertilizer of a part of partial crystallization mother liquor, another part crystalline mother solution are back in the high wastewater equalization pond of natural pond liquid, and logistics agent constitutes a closed cycle circle.The invention solves the liquid discharging of natural pond, Wastewater from Pig Farm fermentation back to the severe contamination that environment causes, obtained three products such as tropina, crystal salt, compoiste fertilizer simultaneously, the evaporation condensed water in concentrating can be used as the pig farm water of productive use again and obtains utilizing.
Embodiment 1:
At first, natural pond liquid waste water 3000ml is heated to 110 ℃, keep after 4 minutes to add cellulosic flocculating aids GK-250 (Shanghai rub fine cause ltd provide) 0.5%, B filter and washing leaching cake once, obtain removing mother bacterial liquid 2960ml, wet cake 50g; Then, after removing mother bacterial liquid and concentrating 5 times, add sulfuric acid and transfer between the ph value 5.5-7.5, temperature 10-80 ℃ of following desalination obtains vitriol 100kg, desalination and concentration crystalline mother solution 400ml after centrifugal; At last, crystalline mother solution continuation drying obtains the about 120g of compoiste fertilizer.
Embodiment 2:
Every day 60m
3Natural pond liquid waste water, metering pump into tempering tank and evenly add 18m
3Crystalline mother solution, mix post-heating to 100 ℃, 10 minutes, add 1.0kg cellulosic flocculating aids after the thalline flocculation, Plate Filtration obtains thalline 7.5kg (water ratio 64%) and removes mother bacterial liquid 70.5 m
3, remove mother bacterial liquid and squeeze into the concentrated and crystallization of multiple-effect concentration systems with pump, obtain magma 23 m after the concentrated crystallization simultaneously
3With water of condensation 47.5m
3, magma obtains vitriol about 1.5 tons and crystalline mother solution 22m through the whizzer separation
3, as compoiste fertilizer, all the other 18m3 mother liquors are with originally sending into tempering tank, the cyclical operation of beginning next round after the crystalline mother solution spraying drying of taking-up 4.
Claims (4)
1. administer the Wastewater from Pig Farm fermentation close circulation technology of natural pond liquid afterwards for one kind, it is characterized in that concrete steps are following:
(1) natural pond liquid waste water is joined in the equalizing tank, add the crystalline mother solution that refluxes in the equalizing tank simultaneously, heat flocculation-filtration method is removed the zymophyte in the liquid waste water of natural pond, obtains tropina and removes mother bacterial liquid;
(2) remove mother bacterial liquid and concentrate, obtain condensed water and crystallization magma;
(3) the crystallization magma is delivered to spinning in the demineralizer, obtains crystal salt and crystalline mother solution;
(4) take out partial crystallization mother liquor spraying drying and produce compoiste fertilizer, all the other crystalline mother solutions are back to the natural pond liquid high-concentration waste water equalizing tank of raising pigs, and make logistics agent constitute the closed cycle circle.
2. method according to claim 1 is characterized in that controlled temperature is 80-120 ℃ in the flocculation-filtration method of heat described in the step (1), and soaking time is 2-25 minute, and adds cellulosic flocculating aids after-filtration zymophyte.
3. method according to claim 1, it is characterized in that removing in the step (2) the mother bacterial liquid cycles of concentration is 2-8 times.
4. method according to claim 1 can add sulfuric acid or sodium sulfate when it is characterized in that in the step (3) spinning of crystallization magma, and controlled temperature 20-120 ℃, pH value is that crystallization removes vitriol under the 4.0-8.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100642610A CN102583835A (en) | 2012-03-13 | 2012-03-13 | Closed-cycle circulating process for governing biogas slurry fermented through wastewater from pig farms |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100642610A CN102583835A (en) | 2012-03-13 | 2012-03-13 | Closed-cycle circulating process for governing biogas slurry fermented through wastewater from pig farms |
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| CN102583835A true CN102583835A (en) | 2012-07-18 |
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| CN2012100642610A Pending CN102583835A (en) | 2012-03-13 | 2012-03-13 | Closed-cycle circulating process for governing biogas slurry fermented through wastewater from pig farms |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161324A (en) * | 1996-06-25 | 1997-10-08 | 无锡轻工大学 | Method for extracting glutamic acid from fermentation liquor |
| CN1880235A (en) * | 2005-06-13 | 2006-12-20 | 山东西王糖业有限公司 | Sewage treatment and recovery and reuse method in lysine production |
| KR20080104957A (en) * | 2007-05-29 | 2008-12-03 | 박재철 | Apparatus for treating organic wastewater |
| CN102010112A (en) * | 2010-09-27 | 2011-04-13 | 南京宏博环保实业有限公司 | Method for treating livestock wastes |
| CN102351395A (en) * | 2011-06-23 | 2012-02-15 | 杭州职业技术学院 | System and method for treating pig manure and cultivation sewage |
-
2012
- 2012-03-13 CN CN2012100642610A patent/CN102583835A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161324A (en) * | 1996-06-25 | 1997-10-08 | 无锡轻工大学 | Method for extracting glutamic acid from fermentation liquor |
| CN1880235A (en) * | 2005-06-13 | 2006-12-20 | 山东西王糖业有限公司 | Sewage treatment and recovery and reuse method in lysine production |
| KR20080104957A (en) * | 2007-05-29 | 2008-12-03 | 박재철 | Apparatus for treating organic wastewater |
| CN102010112A (en) * | 2010-09-27 | 2011-04-13 | 南京宏博环保实业有限公司 | Method for treating livestock wastes |
| CN102351395A (en) * | 2011-06-23 | 2012-02-15 | 杭州职业技术学院 | System and method for treating pig manure and cultivation sewage |
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Application publication date: 20120718 |