CN102173531B - In-situ processing method of alkaline land washing water - Google Patents
In-situ processing method of alkaline land washing water Download PDFInfo
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- CN102173531B CN102173531B CN 201110004862 CN201110004862A CN102173531B CN 102173531 B CN102173531 B CN 102173531B CN 201110004862 CN201110004862 CN 201110004862 CN 201110004862 A CN201110004862 A CN 201110004862A CN 102173531 B CN102173531 B CN 102173531B
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Abstract
The invention discloses an in-situ processing method of alkaline land washing water. The method comprises the following steps: (1) the alkaline land washing water flows through a wet land with a salt absorption filtering function, wherein the wet land is sequentially divided into the following areas according to the washing water flow direction: a washing water buffer regulation area, a physical filtering area, a wet land planting area, a secondary physical adsorption filtering area and a washing water outlet buffer area; and (2) the washing water processed in the step (1) flows through an alkali discharge channel additionally provided with an adsorption bed. The method processes the alkaline land washing water by use of the alkali discharge channel and alkali discharge pool, has low cost and avoids environmental pollution; the processed washing water can be reused, and the processed adsorption material can be used as a building material to prepare coatings, building thermal insulation materials and the like; and the method not only improves performance, but also realizes cyclic use of resources.
Description
Technical field
The present invention relates to a kind of saltings wash water treatment process, particularly relate to a kind of utilization row alkali canal, row's alkali pond, in the process of saltings washing water discharge and collection, realize in-situ treatment, save the saltings wash water treatment process of investment and working cost.
Background technology
At present, the treatment process of saltings wash water mainly contains following several both at home and abroad:
(1) lime-soda ash tenderizer: can effectively remove main component such as calcium, magnesium, phosphoric acid salt and silicon-dioxide etc. in the water, and the suspended substance in the water, corrosion product and microorganism viscosity mud etc. are removed in precipitation and filtration procedure, easily dewater but produce body refuse;
(2) chemical deionization (ion exchange method): need the industrial raw material such as soda acid of a large amount of ion exchange resin and regeneration usefulness, therefore not only working cost is very high, and the discharging of acid-base waste fluid also can pollute;
(3) membrane separation technique desalination (electrodialysis and reverse osmosis method): the requirement to film and influent quality is very high, and the operation of operation and maintenance bothers in addition;
(4) heating power desalination (distillation method): comprise multiple-effect evaporation, multistage flash evaporation, calm the anger distillation, membrane distillation, but power consumption is high, water producing cost is quite high, can not satisfy a large amount of industrial process waters, is difficult to realize industrialization.
(5) biological method: less energy consumption, processing efficiency is high, can process high slat-containing wastewater, but by less salt to high salt, microorganism has an adaptive phase.During from fresh water environment to hypersaline environment, because the variation of salt may cause the change of microbial metabolism approach, the result that bacterial classification is selected makes the bacterial classification that adapts to high salt less, only have when microorganism after cultivating domestication, could produce the bacterial classification that adapts to high salt, to tolerate certain salt concn.
(6) electro-adsorption method: external: H.I.Becker is after nineteen fifty-seven has been obtained with the patent of invention of gac as the double layer electrodes material, begin to utilize this type of electrode desalination from slightly alkaline water the sixties in 20th century, this is the earliest application of adsorption technology in the desalination field.Domestic: the electro-adsorption technology starts to walk evening at home, Chen Fu contract quotation road with porous broad-area electrode electro-adsorption except anhydrating the method for intermediate ion.Yang Huiyun etc. utilize active carbon fiber electrode that NaCl solution is carried out the capacitive character desalination.The large-scale sewage disposal electrode adsorption of domestic first cover ton device was constructed and put into operation in Taiyuan water factory of Chemical Industry Group Co., Ltd in 2007 7 years 27 days, and backwater can reach Chemical Manufacture process water standard.But this technical system exists, and industrial route is long, present stage engineering reliability, technical costs, problem that production cost is high.
In the measures of improvement saline-alkali soil, from renovation dynamics, the salt discharge effect in saltings with promote the use of scope, irrigation, draining, flushing soil salt and strict controlling groundwater level are the essential measures of improvement saltings and prevention Secondary Saline.There is following problem objectively in this filling row engineering: 1. desalinization of soil by flooding or leaching draining consumes too much water resources, generally needs 4500-7500m
3/ hm
2Large irrigation quota, irrigation water use is high, the saltings appears at again the arid and semi-arid lands mostly, Freshwater resources are unusual preciousness especially; 2. it is large to wash ground drainage system amount, and drainage system drops into high, general ten thousand yuan/hm of 0.9-1.2
2, uneconomical, and the engineering construction of the row of filling is loaded down with trivial details; 3. after washing ground, waste water directly enters the ecosystem, without any processing, has destroyed the balance of water system.
The water resources of China is not abundant, total about 2.7Tm of owning amount
3, can be 1-1.1Tm for the Freshwater resources amount of development and use
3, by per capita, be about the world per capita the water yield 1/4, classify the 110th in the world as.This agriculture production big country of China, the cultivated soil irrigation water use all occupies high-leveled and difficult lower always, agro-farming with water resources in the water resources utilized of present China shared ratio up to 70% about.The water yield that is used for the improvement saltings has accounted for again 80% of agro-farming total water amount.Vast Xinjiang, the Gansu province of China's area particularly, it is typical arid and semi-arid area, lack of water is particularly serious, and the light and heat condition of this area is particularly suitable for the growth of economic farm crop, these areas, high light heat-flash condition and strong evaporation have caused again big area, general saline Land, and these have the crop land in the vast zone of good light heat condition, must expend again the fresh water of a large amount of preciousnesses when utilizing in the soil and remove water-soluble objectionable constituent in the saltings.
Summary of the invention
Technical problem to be solved by this invention provides a kind of saltings wash water treatment process, the saltings wash water is processed in the method utilization row alkali canal, row's alkali pond, cost is low, environmentally safe, but the wash water reuse after the processing, the sorbing material after the processing can be used as material of construction, makes coating, building thermal insulation material etc., not only performance improves, and resource has obtained recycle.
Technical scheme provided by the invention is: a kind of saltings wash water in-situ treatment method, and the method is as follows:
(1) the saltings wash water flows through and has the salt of suction filtering function wetland, and described wetland is followed successively by according to the wash water water (flow) direction: wash water dash adjustment district, physical filtering district, wetland growing area, secondary physical adsorption filtration district, wash water outlet buffer zone;
(2) wash water after (1) step processed flows through the row's alkali channel that has additional adsorption bed.
In above-mentioned (1) step, in described physical filtering district and secondary physical adsorption filtration district, pile up the physical filtering layer, the filtering layer material is: granularity is one or more in the zeolite, cinder, sepiolite of 0.2～15cm.
Above-mentioned method, described filtering layer material is zeolite and cinder, the ratio of zeolite and cinder is 4.5-6: 1, optimum proportion is 4.5: 1.
Above-mentioned method, described filtering layer material is zeolite, cinder and sepiolite, the ratio of zeolite, cinder and sepiolite is 4.5-3: 1: 4.5-6.
Above-mentioned method, in (1) step, at the wetland growing area, plantation salt tolerant, the algae that inhales salt plant and cultivation salt tolerant, described salt tolerant, to inhale the salt plant be that Chenopodiaceae, Atriplex triangularis, Atyiplex canescen, alkali are fluffy, and the algae of salt tolerant is Nitzschia palea, Dunaliella salina, diatom.
Above-mentioned method, in (2) step, the filler of described adsorption bed bed body is layered silicate, attapulgite, sepiolite, wilkinite, and comparatively preferably, described silicate, attapulgite, sepiolite, bentonitic weight ratio are 1: 0.8-1.4: 0.45-0.6: 0.3-0.55.
Above-mentioned method, in (2) step, described row's alkali channel is preferably row's alkali canal of original saltings wash water.
The present invention has following beneficial effect:
Build easy row's alkali canal artificial bio-membrane and inhale the salt wetland, the good salt microorganism, the aquatic plant of good salt that add ecological safety, at functional wetland Region, set up the good salt of an ecologic biological pre-treatment district, make wetland improve the removal that the near field ecotope is finished first step salinity simultaneously, salinity clearance about 15%.The row's of utilization alkali canal is built series absorption desalting process civil engineering equipment, carry out multistage physical adsorption desalination, finish the technical requirements of removing of different salinities, preliminary testing data shows: this technological process needs the series connection adsorption process of 3-5 different physical absorbents, reaches comprehensive salinity clearance about 75%.Physisorption material among the present invention after the absorption is used for material of construction, makes coating, building thermal insulation material etc., and not only performance improves, and resource has obtained recycle.The comprehensive cost that adopts the inventive method to process the saltings wash water is: 0.08-0.15 unit/cubic meter wash water.
Description of drawings
Fig. 1 is the inventive method process flow sheet.
Fig. 2 is function wetland structure subregion synoptic diagram among the present invention.
Fig. 3 is that synoptic diagram is looked at row's alkali canal mansion among the present invention.
Fig. 4 is row's alkali canal flow direction median synoptic diagram among the present invention.
Wherein, arrow is water (flow) direction, and B1 is wash water dash adjustment district, and the A1 district is the physical filtering district, and the A2 district is the wetland growing area, and A3 is secondary physical adsorption filtration district, this wash water outlet buffer zone of B2,1-row alkali canal, 2-adsorption bed.
Embodiment
Detailed description below by embodiment is further illustrated the present invention, but is not limitation of the present invention, only does the example explanation.
1, foundation has the salt of suction filtering function wetland
See also accompanying drawing 2, build its structural division of function wetland in the district that gathers of large stretch of saltings wash water:
The B1 district: wash water dash adjustment district, satisfy the saltings and washed residence time 1-2 hour.
The A1 district: the physical filtering district, pile up the physical filtering layer, material is: granularity is one or more in the zeolite, cinder, sepiolite of 0.2～15cm.The filtering layer material is zeolite and cinder in the present embodiment, and by weight, the ratio of zeolite and cinder is 4.5: 1, thickness 0.6-1.2 rice, and filtering layer 4-8 layer is good.
The A2 district: the wetland growing area, the plantation salt tolerant, inhale the salt plant, fluffy etc. such as: Chenopodiaceae, Atriplex triangularis, Atyiplex canescen, alkali; Cultivate the algae of salt tolerant, as: Nitzschia palea, Dunaliella salina, diatom.
The A3 district: secondary physical adsorption filtration district, the function sill is with the A1 district.
The B2 district: wash water outlet buffer zone satisfies the 05-1.5 hour wash water residence time.
2, set up channeltype dynamic adsorption bed
Utilize row's alkali canal 1 of original saltings, saltings area wash water to be transformed into as shown in Figure 3, Figure 4 channeltype dynamic adsorption bed 2.
The filler of 2 bodies of adsorption bed is layered silicate, attapulgite, sepiolite, wilkinite, and in the present embodiment, silicate, attapulgite, sepiolite, bentonitic weight ratio are 1: 1: 0.5: 0.4.The quantity of adsorption bed 2 can be decided according to the water quality situation in row's alkali canal 1, is 3 series connection adsorption beds in the present embodiment.
The saltings wash water flows through wash water dash adjustment district B1 successively, physical filtering district A1, and wetland growing area A2, secondary physical adsorption filtration district A3, then wash water outlet buffer zone B2 flows through the row's alkali canal 2 that has additional adsorption bed 2.See also Fig. 1, wash water after the inventive method is processed can reach dense and reach agricultural fresh water standard with the fresh water standard or after allotment, absorption material in filtering layer and the adsorption bed is after absorption reaches capacity, to adsorb the starting material displacement, put into new sorbing material, the sorbing material that cements out is done the material of construction comprehensive utilization, for example: make building coating; Filling material of polymers etc.The sorbing material time swap is generally definite by process environments, when adsorptive value reaches the first saturated adsorption value 30%, and the displacement sorption material; And the saturated adsorption value is with envrionment conditions, and condition of water quality changes to some extent, determines by technique is live.
Claims (7)
1. saltings wash water in-situ treatment method is characterized in that the method is as follows:
(1) the saltings wash water flows through and has the salt of suction filtering function wetland, and described wetland is followed successively by according to the wash water water (flow) direction: wash water dash adjustment district, physical filtering district, wetland growing area, secondary physical adsorption filtration district, wash water outlet buffer zone;
(2) wash water after (1) step processed flows through the row's alkali channel that has additional adsorption bed;
Wherein, in (1) step, in described physical filtering district and secondary physical adsorption filtration district, pile up the physical filtering layer, the granularity of filtering layer material is 0.2 ~ 15cm, and described filtering layer material is zeolite and cinder, and the ratio of zeolite and cinder is 4.5-6:1, perhaps described filtering layer material is zeolite, cinder and sepiolite, and the ratio of zeolite, cinder and sepiolite is 4.5-3:1:4.5-6.
2. method according to claim 1, it is characterized in that: described filtering layer material is zeolite and cinder, the ratio of described zeolite and cinder is 4.5:1.
3. method according to claim 1 is characterized in that: in (1) step, at the wetland growing area, plant the algae of salt tolerant, suction salt plant and cultivation salt tolerant.
4. method according to claim 3 is characterized in that: described salt tolerant, to inhale the salt plant be that Atriplex triangularis, Atyiplex canescen, alkali are fluffy, and the algae of salt tolerant is Nitzschia palea, Dunaliella salina, diatom.
5. method according to claim 1 is characterized in that: in (2) step, the filler of described adsorption bed bed body is layered silicate, attapulgite, sepiolite, wilkinite.
6. method according to claim 5, it is characterized in that: described silicate, attapulgite, sepiolite, bentonitic weight ratio are 1:0.8-1.4:0.45-0.6:0.3-0.55.
7. method according to claim 1 is characterized in that: in (2) step, and row's alkali canal that described row's alkali channel is original saltings wash water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110004862 CN102173531B (en) | 2011-01-12 | 2011-01-12 | In-situ processing method of alkaline land washing water |
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| CN 201110004862 CN102173531B (en) | 2011-01-12 | 2011-01-12 | In-situ processing method of alkaline land washing water |
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| CN102173531B true CN102173531B (en) | 2013-10-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN106171094A (en) * | 2016-07-19 | 2016-12-07 | 莆田秀屿区群韬农业技术开发有限公司 | A kind of modification method in salt-soda soil, sea area |
| CN106592732A (en) * | 2017-01-05 | 2017-04-26 | 天津大学 | Saline-alkali soil drainage, storage, purifying, and recycling system based on sponge city |
| CN108978784A (en) * | 2018-10-11 | 2018-12-11 | 南京林业大学 | Saline alkali land drainage accumulation, purification and cyclic utilization system based on sponge city |
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| US20080156731A1 (en) * | 2002-10-08 | 2008-07-03 | Water Standard Company, Llc | Water desalination systems and methods |
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| Title |
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| 陈兰等.盐碱地洗水回收利用研究(Ⅰ).《现代农业科技》.2010,(第16期),第263-265、270. * |
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Address after: 101512, Beijing, Miyun Town, Weng village, North Village, 1000 meters high Applicant after: BEIJING HENGYUAN JIADA TECHNOLOGY Co.,Ltd. Address before: 101500, Beijing, Miyun before the town of Jia Jia Jia Cun north Applicant before: Beijing Hengyuan Jiada Technology Co.,Ltd. |
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