CN103303988A - Treatment method of saline-alkali soil reformation wastewater - Google Patents
Treatment method of saline-alkali soil reformation wastewater Download PDFInfo
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- CN103303988A CN103303988A CN201310277572XA CN201310277572A CN103303988A CN 103303988 A CN103303988 A CN 103303988A CN 201310277572X A CN201310277572X A CN 201310277572XA CN 201310277572 A CN201310277572 A CN 201310277572A CN 103303988 A CN103303988 A CN 103303988A
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Abstract
The invention relates to the field of sewage treatment, and in particular relates to a treatment method of saline-alkali soil reformation wastewater. The treatment method comprises the following steps of: from June to October, gathering wastewater generated from saline-alkali soil reformation in a reservoir; from December to February of next year, when the wastewater in the reservoir generates surface ice and subglacial water containing salt at outdoor temperature, transferring the subglacial water to an evaporation tank to generate a first ice layer and first subglacial salty water; from April to June of the next year, promoting natural evaporation of the first subglacial salty water to obtain salt and salty water; meanwhile, recharging water generated from melting the surface ice in the reservoir and the first ice layer in the evaporation tank to farmland. The treatment method of the saline-alkali soil reformation wastewater can be used for solving the problem of related technologies which directly discharge wastewater to river or waste land without any treatment to result in secondary pollution.
Description
Technical field
The present invention relates to sewage treatment area, in particular to a kind of alkaline land improvement wastewater treatment method.
Background technology
In the area, Northeast China, there is a large amount of saltingss, because a large amount of salt and alkali components is contained in the saltings, therefore, generally speaking, so that guarantee income preferably, just need can carry out normal crop-planting with after the alkaline land improvement.At present, common alkaline land improvement mainly comprises the method for " with washing alkali ", " with hydraulic pressure alkali ", in the process of above method to alkaline land improvement, can produce a large amount of waste water that contains yellow soda ash, sodium sulfate and greening sodium.
But, in correlation technique, the waste water major part of above-mentioned generation all just be discharged into rivers through any processing or the soil that falls into disuse on, therefore caused secondary pollution.
Summary of the invention
The object of the present invention is to provide a kind of alkaline land improvement wastewater treatment method, to solve the above problems.
A kind of alkaline land improvement wastewater treatment method is provided in the embodiments of the invention, has may further comprise the steps:
In June-October, with the Waste Water Centralized that produces behind the alkaline land improvement in water reservoir;
In year February in December-second, the waste water in the water reservoir produces surperficial ice cube and contains salt under external temperature subglacial water is transferred to generation first ice sheet and the first subglacial salt solution in the evaporation tank with subglacial water;
In April, second-June, make the first subglacial salt solution carry out spontaneous evaporation, obtain salt and salt solution; The water of the generation after simultaneously the surperficial ice cube in the water reservoir and first ice sheet in the evaporation tank being dissolved recharges the farmland.
This alkaline land improvement wastewater treatment method that the embodiment of the invention provides, June to October, after the Waste Water Centralized that produces in the alkaline land improvement process is in the water reservoir, in year February in December-second, waste water in the water reservoir is under external temperature (being generally-20 ℃--30 ℃), can produce from the waste water surface phenomenon of freezing gradually downwards, water molecules solidify magnetism between the positive and negative charge that has destroyed between salt, water molecules, molecules of salt is shifted in the water that does not freeze, thereby the subglacial water that can obtain discharging the surperficial ice cube of molecules of salt and assemble a large amount of salinities; Subglacial water is transferred to generation first ice sheet and the first subglacial salt solution in the evaporation tank; In April, second-June, the first subglacial salt solution that contains a large amount of salinities evaporates a large amount of moisture by dry monsoon climate in evaporation tank, can obtain salt and salt solution, and salt can directly obtain and be applied to deep processing.Just the waste water in the alkaline land improvement process can be obtained handling by above step, reclaim a large amount of salinities that it contains, and the water that reclaims recharged the farmland, recycling, and then solved in the correlation technique on the soil that waste water just has been discharged into rivers through any processing or has fallen into disuse and caused secondary pollution problem.
In addition, the transformation wastewater treatment method in this saltings of the present invention, generally speaking, if cross in April, second-June, rainfall amount is not that the cycle of wastewater treatment only needed 1 year can realize instant effect under the very big situation.
Description of drawings
Fig. 1 shows the schema of a kind of alkaline land improvement wastewater treatment method of the embodiment of the invention 1.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Please refer to Fig. 1, the alkaline land improvement wastewater treatment method method that the embodiment of the invention one provides comprises:
Step 101: in June-October, with the Waste Water Centralized that produces behind the alkaline land improvement in water reservoir;
Step 102: in year February in December-second, the waste water in the water reservoir produces surperficial ice cube and contains salt under external temperature subglacial water is transferred to generation first ice sheet and the first subglacial salt solution in the evaporation tank with subglacial water;
Step 103: in April, second-June, make the first subglacial salt solution carry out spontaneous evaporation, obtain salt and salt solution; The water of the generation after simultaneously the surperficial ice cube in the water reservoir and first ice sheet in the evaporation tank being dissolved recharges the farmland;
This alkaline land improvement wastewater treatment method that the embodiment of the invention provides, June to October, after the Waste Water Centralized that produces in the alkaline land improvement process is in the water reservoir, in year February in December-second, waste water in the water reservoir is under external temperature (being generally-20 ℃--30 ℃), can produce from the waste water surface phenomenon of freezing gradually downwards, water molecules solidify magnetism between the positive and negative charge that has destroyed between salt, water molecules, molecules of salt is shifted in the water that does not freeze, thereby the subglacial water that can obtain discharging the surperficial ice cube of molecules of salt and assemble a large amount of salinities; Subglacial water is transferred to generation first ice sheet and the first subglacial salt solution in the evaporation tank; In April, second-June, the first subglacial salt solution that contains a large amount of salinities evaporates a large amount of moisture by dry monsoon climate in evaporation tank, can obtain salt and salt solution, and salt can directly obtain and be applied to deep processing.Just the waste water in the alkaline land improvement process can be obtained handling by above step, reclaim a large amount of salinities that it contains, and the water that reclaims recharged the farmland, recycling, and then solved in the correlation technique on the soil that waste water just has been discharged into rivers through any processing or has fallen into disuse and caused secondary pollution problem.
In order to make a kind of alkaline land improvement wastewater treatment method better application of the embodiment of the invention one, more effectively be applied in the process field of alkaline land improvement waste water, the present invention also provides embodiment two on the basis of above-described embodiment one, embodiment two is further restriction and increases that the concrete steps of embodiment one are made, and now does detailed elaboration and explanation:
Embodiment two
Step: 201: form water reservoir, evaporation tank on the ground;
Concrete, in step 201; Form water reservoir and evaporation tank in advance on the ground, preferred, consider the process that the salt solution between follow-up each pond transports, the distance between each pond should not be too big, and the degree of depth of water reservoir is 1-2 rice, and is preferred, is 1.5-1.7 rice; In addition, in excavation water reservoir and evaporation tank, consider that subsequent operations is required, the capping salt basicity in the digging process can be stacked separately by bigger soil and the minimum soil of bottom saline and alkaline, and be used for follow-up landfill process.
Step 202: in June-October, with the Waste Water Centralized that produces behind the alkaline land improvement in water reservoir;
In step 202, in temperature higher season (June-October), in advance with the Waste Water Centralized behind the pending alkaline land improvement in preformed water reservoir, after treating to arrive winter, the process that can carry out freezing processing.
Step 203: in year February in December-second, the waste water in the water reservoir produces surperficial ice cube and contains salt under external temperature subglacial water is transferred to generation first ice sheet and the first subglacial salt solution in the evaporation tank with subglacial water;
In above-mentioned steps 203, concrete, consider in the freezing process, can produce the surperficial ice cube of comparatively large vol, generally speaking, the volume of surperficial ice cube is 2/3 of wastewater volume, so, preferably, waste water accounts for 1/3-1 times of water reservoir volume, and water reservoir also can hold it fully can to guarantee to melt afterwards by surperficial ice cube like this, in addition, subglacial water is transferred in the process of evaporation tank, can preferably by water pump subglacial water be transferred in the evaporation tank.
Step 204: in April, second-June, make the first subglacial salt solution carry out spontaneous evaporation, obtain salt and salt solution; The water of the generation after simultaneously the surperficial ice cube in the water reservoir and first ice sheet in the evaporation tank being dissolved recharges the farmland.
In step 204, with regard to practical situation, the water reservoir floor space is big, it is many to hold the water yield, therefore, and 1 year 4-6 month, after its surperficial ice cube thaws, in order to take full advantage of water reservoir, preferred, can in water reservoir, culture living fish then, for example: loach, grass carp, crucian or carp, and then improving the by-product value, the water after the cultured fishes contains the great number of organic matters that fish produce, but better application is in field irrigation.
Certainly, in April, second-June, if when running into rainy season, will accumulate a large amount of water in the evaporation tank, and then the first subglacial salt solution in the evaporation tank is diluted, therefore, the mode of evaporating brine by spontaneous evaporation may just can not reach the purpose of getting salt, and after obtaining salt, it may residual more salt solution, therefore, just need salt solution be handled and evaporation tank is soared by following operation.
Step 205: in November, second-December, make the salt solution in the evaporation tank under external temperature, generate second ice sheet and the second subglacial salt solution.
In step 205, the salt solution in the evaporation tank is under the lower situation of temperature, on the one hand, it has formed second ice sheet on the top layer, on the other hand, also have the second subglacial salt solution below second ice sheet, in order to realize handling the second subglacial salt solution fully, can be achieved by step 206.
Step 206: the second subglacial salt solution is transferred to shine in the salt pond evaporates brine;
In step 206, being transferred to the second subglacial salt solution that shines the salt pond from evaporation tank can directly evaporate brine, and the salt after solarization is got is applied in the industrial raw material behind separation yellow soda ash, sodium sulfate, the sodium-chlor directly by deep processing.
Step 207: the water after second ice sheet dissolved recharges the farmland;
Concrete, second ice sheet in the evaporation tank when rejuvenate the coming year or temperature namely can melt higher the time, the water after will dissolving also can be used for recharging the farmland, realizes the purpose of recycling.
Because when have the rainy season of being spring then, have residual a large amount of undersaturated salt solution that has in the evaporation tank, so in November, second-December, make the salt solution in the evaporation tank under external temperature, generate second ice sheet and the second subglacial salt solution, the second subglacial salt solution is transferred to shine in the salt pond again and evaporates brine, because the water after first ice sheet in surperficial ice cube and the evaporation tank and second ice sheet thaw in the water reservoir, its saltiness seldom, so, can directly recharge the farmland, and then obtain recycling.
Concrete, in step 206 between the step 207, also comprise: can in shining the salt pond, (can be used as fish food by artemia culture, especially fancy fishes), because after being transferred to the second subglacial salt solution in the solarization salt pond, the salt solution that shines in the salt pond has very high salinity, therefore be fit to very much the growth of halogen worm, and the halogen worm can be used as the feed of fancy fishes.
Step 208: water reservoir, evaporation tank and solarization salt pond are filled and led up, and be used for the plantation farm crop.
After all wastewater treatment process are finished and after being applied to recharge the farmland, optionally, water reservoir, evaporation tank and solarization salt pond can be filled and led up, and for the plantation farm crop, and then after wastewater treatment, again water reservoir, evaporation tank and solarization salt pond are utilized, concrete, in the process of filling and leading up, can with excavation when water reservoir, evaporation tank and solarization salt pond the bigger soil of capping salt basicity bury to the bottom in three ponds, and the minimum native landfill of bottom saline and alkaline is on the top layer in three ponds; Like this, the soil on top layer, three ponds can be directly used in the plantation farm crop.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an alkaline land improvement wastewater treatment method is characterized in that, may further comprise the steps:
In June-October, with the Waste Water Centralized that produces behind the alkaline land improvement in water reservoir;
In year February in December-second, the waste water in the water reservoir produces surperficial ice cube and contains salt under external temperature subglacial water is transferred to generation first ice sheet and the first subglacial salt solution in the evaporation tank with subglacial water;
In April, second-June, make the first subglacial salt solution carry out spontaneous evaporation, obtain salt and salt solution; Simultaneously the surperficial ice cube in the water reservoir and first ice sheet in the evaporation tank are dissolved the water that the back produces and recharge the farmland.
2. alkaline land improvement wastewater treatment method according to claim 1 is characterized in that, in described June-October, before the Waste Water Centralized that produces behind the alkaline land improvement step in the water reservoir, also comprises:
Form water reservoir and evaporation tank on the ground.
3. alkaline land improvement wastewater treatment method according to claim 1, it is characterized in that, in year February in December-second, waste water in the water reservoir produces surperficial ice cube and contains salt under external temperature subglacial water, subglacial water is transferred in the step that generates first ice sheet and the first subglacial salt solution in the evaporation tank, described subglacial water is transferred in the evaporation tank, specifically comprises:
By water pump described subglacial water is transferred in the described evaporation tank.
4. alkaline land improvement wastewater treatment method according to claim 1 is characterized in that, described in April, second-June, makes the first subglacial salt solution carry out spontaneous evaporation, obtains salt and salt solution; Simultaneously the surperficial ice cube in the water reservoir and first ice sheet in the evaporation tank being dissolved the water that the back produces recharges in the step in farmland, surperficial ice cube in the water reservoir and first ice sheet in the evaporation tank are dissolved before water that the back produces recharges the farmland described, also comprise:
After the surperficial ice cube dissolving in the described water reservoir, in described water reservoir, culture living fish then.
5. alkaline land improvement wastewater treatment method according to claim 4 is characterized in that, after described surperficial ice cube dissolving in described water reservoir, cultures in described water reservoir in the step of living fish then:
Described living fish then comprise one or more in loach, grass carp, crucian or the carp.
6. alkaline land improvement wastewater treatment method according to claim 4 is characterized in that, the surperficial ice cube in the water reservoir and first ice sheet in the evaporation tank is dissolved after water that the back produces recharges the farmland described, also comprises:
In November, second-December, make the salt solution in the evaporation tank under external temperature, generate second ice sheet and the second subglacial salt solution;
The second subglacial salt solution is transferred to shine in the salt pond evaporates brine;
Water after second ice sheet dissolved recharges the farmland.
7. alkaline land improvement wastewater treatment method according to claim 6 is characterized in that, shines in the step of evaporating brine in the salt pond the described second subglacial salt solution is transferred to, and also comprises:
Artemia culture in described solarization salt pond.
8. alkaline land improvement wastewater treatment method according to claim 6 is characterized in that, after described water after second ice sheet is dissolved recharges the step in farmland, also comprises:
Described water reservoir, evaporation tank and solarization salt pond are filled and led up.
9. alkaline land improvement wastewater treatment method according to claim 2 is characterized in that, in the described step that forms water reservoir and evaporation tank on the ground:
The degree of depth of described water reservoir is 1-2 rice.
10. alkaline land improvement wastewater treatment method according to claim 8 is characterized in that, in the described step that described water reservoir, evaporation tank and solarization salt pond are filled and led up, specifically comprises:
After described water reservoir, evaporation tank and solarization salt pond filled and led up, be used for the plantation farm crop.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310277572.XA CN103303988B (en) | 2013-07-03 | 2013-07-03 | Treatment method of saline-alkali soil reformation wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310277572.XA CN103303988B (en) | 2013-07-03 | 2013-07-03 | Treatment method of saline-alkali soil reformation wastewater |
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| CN103303988A true CN103303988A (en) | 2013-09-18 |
| CN103303988B CN103303988B (en) | 2015-01-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045154A (en) * | 2016-07-12 | 2016-10-26 | 山东胜伟园林科技有限公司 | Process for treating wastewater generated after saline-alkali soil improvement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872909A (en) * | 1972-01-10 | 1975-03-25 | Atomic Energy Commission | Method of desalinating salt water |
| JPH02191586A (en) * | 1989-01-19 | 1990-07-27 | Kawanami Shunpei | Device for desalting sea water |
| CN1686839A (en) * | 2005-03-25 | 2005-10-26 | 田魁祥 | Method for desalting bitter through ice making by using natural cold source |
| CN202022818U (en) * | 2011-03-17 | 2011-11-02 | 杜文娟 | Facility utilizing natural resources to produce ice to desalt seawater and produce salt |
-
2013
- 2013-07-03 CN CN201310277572.XA patent/CN103303988B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872909A (en) * | 1972-01-10 | 1975-03-25 | Atomic Energy Commission | Method of desalinating salt water |
| JPH02191586A (en) * | 1989-01-19 | 1990-07-27 | Kawanami Shunpei | Device for desalting sea water |
| CN1686839A (en) * | 2005-03-25 | 2005-10-26 | 田魁祥 | Method for desalting bitter through ice making by using natural cold source |
| CN202022818U (en) * | 2011-03-17 | 2011-11-02 | 杜文娟 | Facility utilizing natural resources to produce ice to desalt seawater and produce salt |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045154A (en) * | 2016-07-12 | 2016-10-26 | 山东胜伟园林科技有限公司 | Process for treating wastewater generated after saline-alkali soil improvement |
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| CN103303988B (en) | 2015-01-07 |
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