CN102010064A - Sodium removing technology for secondary processing sewage - Google Patents
Sodium removing technology for secondary processing sewage Download PDFInfo
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- CN102010064A CN102010064A CN2009101698857A CN200910169885A CN102010064A CN 102010064 A CN102010064 A CN 102010064A CN 2009101698857 A CN2009101698857 A CN 2009101698857A CN 200910169885 A CN200910169885 A CN 200910169885A CN 102010064 A CN102010064 A CN 102010064A
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- wilkinite
- sodium
- bentonite
- removing technology
- stage treatment
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Abstract
The invention relates to a sodium removing technology for secondary processing sewage, particularly comprising three steps of bentonite crushing degree selection, a compound sodium removing technology for bentonite sands and plants and a bentonite adsorption matrix regenerated technology. By adopting the sodium removing technology, the average removal rate of sodium can reach more than 50%, and the problems of high saltness of secondary processing sewage, high deep processing cost and secondary salinization of soil easily caused by farmland irrigation are solved. The sodium removing technology for secondary processing sewage belongs to the technical field of the agricultural biology.
Description
Technical field
The present invention relates to the sodium technology of removing of second-stage treatment sewage.Specifically comprise compound sodium technology, 3 steps of wilkinite absorption matrix regeneration techniques removed of the selection of wilkinite pulverizing degree, wilkinite fine sand and plant, remove the sodium technology by this, solve second-stage treatment sewage saltiness height, advanced treatment expense height, irrigated farmland easily cause the problem of soil secondary salinization.Belong to agricultural biological technical field.
Background technology
Second-stage treatment sewage is meant the water of waste water through discharging after the second-stage treatment.It has removed the organic pollutant that is colloidal state in the waste water significantly than the water inlet before handling.Its organic clearance can reach more than 90%, BOD in the water outlet and suspension solid content are all below 30mg is several, therefore but the removal ability to salt ion in the water body is very weak, utilizes second-stage treatment sewage to irrigate the accumulation that (especially steam output is big, rainfall is less, salt discharge is bad area) might cause soil salt for a long time.
Canada T.J.Hogg (1996) shows that with the data that reach 15 years irrigate green grassland with secondary treated wastewater, sodium and muriate increasing degree are bigger in the underground water.China Agricultural University yellow hat worn by a Taoist priest China (2002) etc. has carried out utilizing the test of the irrigation of domestic sewage turfgrass after husky filtration measure is handled, and discovers that tangible accumulation phenomenon has appearred in salinity in the grassland soil (especially sodium ion).The research of Wu Changlin (2006) also finds to utilize salinity in the soil of second-stage treatment sewage irrigation of second-stage treatment in various degree accumulation phenomenon also to occur, compare with the soil background values, water-soluble sodium cumulative comparison is obvious in the soil, and the second-stage treatment sewage irrigation is less to other salt contents influences in the soil.Left side great waves (2006) etc. are irrigated 5 kinds of turfgrasss (English grass, Festuca Arundinacea, jielu grass, buffalograss, Radix Liriopes) with secondary treated wastewater, and the result shows that the soil of second-stage treatment sewage irrigation has the saliferous trend of generation.Wang Yanchun, Zhang Juan etc. (2007) have studied the influence of second-stage treatment sewage irrigation to representational ornamental plant mineral element in Beijing area and soil property, point out under the second-stage treatment sewage irrigation condition that total salt quantity, water-soluble sodium, exchange state sodium and muriate all show rising trend in the soil.Yang Linlin etc. (2006) are by the method for indoor soil-column simulation test, studied the influence of second-stage treatment sewage irrigation to soil physico-chemical property, the result shows the increase along with second-stage treatment sewage irrigation number of times, P in soil H value reduces, total salt quantity increases, and each ionic concn has significant change in the soil solution.In sum, correlative study both at home and abroad shows that all with second-stage treatment sewage irrigation lawn, soil salt branch produces the accumulation phenomenon, mainly shows as the increase of sodium ion and chloride ion content.
Wilkinite is to be the clay of essential mineral composition with the montmorillonite, has very big specific surface area, and good adsorption performance and cation exchange capacity (CEC) have a lot of application aspect the heavy metal contaminants in planar water.Have another name called class and take off rock, be a kind of aqueous aluminosilicate earthy mineral, be white to olive-green, density is 2.4～2.8kg/dm3, and crystalline structure belongs to 2: 1 types, and its main component is montmorillonite (Al4Si8O23 (OH) nH2O), be electronegativity, have some cationic ability of absorption, except that some positively charged ions were adsorbed in inside, appearance was also adsorbed some positively charged ions.These positively charged ions and crystalline connect very insecure, are easily replaced by ion at a low price, carry out between crystal layer, do not influence bentonitic structure.According to this principle, add positively charged ions such as some lithiums, sodium, calcium, magnesium and potassium artificially, thereby realized alta-mud modification.People such as Ma Yong have studied the performance of the organic-pillared modified alta-mud processing waste water containing chrome of aluminium Ti-inorganic, and the result shows that organic-inorganic pillared modification wilkinite is fine to the treatment effect of waste water, and the wilkinite clearance of organic-pillared modification reaches.People such as Wang Daizhi have studied the bentonite in treatment lead waste water of sour modification, the result shows that plumbous clearance is greater than 99%, with the Na2CO3 modification time, the ion-exchange of Na+ and Ca2+ is peeled off the montmorillonite generation wafer in the clay, and the montmorillonite surface is electronegative under alkaline condition.
Summary of the invention
The objective of the invention is to set up second-stage treatment sewage and remove the sodium technical system.
Content of the present invention comprises the selection of wilkinite pulverizing degree, the compound recovery technique of plants of bentonite, wilkinite regeneration techniques.
Second-stage treatment sewage of the present invention removes the sodium technology, simple to operate, expense is low, the clearance of sodium can reach more than 50%, sewage work is when carrying out second-stage treatment to sewage, the second-stage treatment sewage that utilization this method is handled can be directly used in field irrigation, and does not have the saliferous danger of frequency.
(1) wilkinite pulverizing degree is selected optional following one: order A.30; B.50 order; C.100 order.
(2) the optional following one of plants of bentonite complex configuration: A: wilkinite+Festuca Arundinacea; B: wilkinite+fine sand+Festuca Arundinacea.
(3) the optional following one of wilkinite absorption matrix regeneration techniques: A: stop to import 1 week of moisture; B: tap water and wilkinite absorption matrix carry out drip washing with 1: 1 amount.
The present invention carries out rational proportion with fine sand, and has increased phytoremediation technology after bentonite modified, removes sodium efficient height, and expense is low, has novelty.
The scheme of technical solution problem of the present invention divides following five steps to finish:
(1) gather the wilkinite raw ore, carry out pulverization process after fetching, pulverizing the back particle diameter is 30 orders, 50 orders and 100 orders.
(2) wilkinite after the pulverization process is air-dry, carries out proportioning with fine sand and is filled to down in the pvc pipe post of water outlet.
(3) inhale the salt plant seeding, thickness of sowing is 15g/m
2, be sprayed to tap water every day and emerge.
(4) all emerge after, with tap water wilkinite is adsorbed matrix and waters, then with 25.5L/min/m to saturated
3Flow velocity input second-stage treatment sewage, and collect water outlet in the pvc pipe bottom.
(5) the fill ratio reaches at 2.5: 1 o'clock and stops to import second-stage treatment sewage in the input water yield and the tubing string, and it is all or carry out drip washing with tap water to stop to import moisture 1, continues with 25.5L/min/m afterwards
3Flow velocity carry out water treatment.
Embodiment
Further illustrate the present invention in the following embodiments, this does not limit the scope of the invention.
Embodiment 1
On June 11st, 2009 was gathered second-stage treatment sewage in Hebei province's Cangzhou City sewage work, the sodium content of this water outlet is 434.44mg/kg, carry out adsorption treatment after fetching at once, adopt wilkinite pulverizing degree for passing through 50 mesh sieves, with 1: 1 proportioning of fine sand, the plantation Festuca Arundinacea, flooding quantity is 25.5L/min/m
3Gather water sample every day and carry out the mensuration of water outlet sodium content, the clearance of first day sodium on average reaches 80%, the average removal rate of second day sodium reaches 76.4%, continue to the 4th day clearance and reach 40%, stopped afterwards handling 7 days, and proceeded adsorption treatment then, the clearance that continues 4 days sodium all can reach more than 50%.
Embodiment 2
Wilkinite is pulverized degree and flooding quantity carries out according to embodiment 1, institute's difference is that the plants of bentonite complex configuration is wilkinite+Festuca Arundinacea, the clearance of first day sodium on average reaches 75%, continue the 4th day clearance and reach 47.5%, stop to import one week of moisture afterwards, proceed adsorption treatment then, the clearance that continues four days sodium all can reach more than 54%.
Embodiment 3
Wilkinite is pulverized degree, flooding quantity and plant complex configuration and is all undertaken by embodiment 2, institute's difference is to continue to handle after 4 days, with carrying out drip washing with wilkinite absorption matrix with the tap water of 1: 1 amount, the clearance that continues four days sodium afterwards on average can reach 58%.
Claims (5)
1. second-stage treatment sewage removes the sodium technology, and this method comprises the selection of wilkinite pulverizing degree, the compound recovery technique of plants of bentonite, wilkinite regeneration techniques.
2. according to the described method of claim 1, it is characterized in that the wilkinite particle diameter selects optional following one: order A.30; B.50 order; C.100 order.
3. according to the described method of claim 1, it is characterized in that the optional following one of wilkinite and fine sand proportioning: A.1: 0; B.1: 1.
4. according to the described method of claim 1, it is characterized in that the optional following one of plants of bentonite complex configuration: A: wilkinite+Festuca Arundinacea; B: wilkinite+fine sand+Festuca Arundinacea.
5. according to the described method of claim 1, it is characterized in that the optional following one of wilkinite absorption matrix regeneration techniques: A: stop to import 1 week of moisture; B: tap water and wilkinite absorption matrix carry out drip washing with 1: 1 amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101698857A CN102010064A (en) | 2009-09-08 | 2009-09-08 | Sodium removing technology for secondary processing sewage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101698857A CN102010064A (en) | 2009-09-08 | 2009-09-08 | Sodium removing technology for secondary processing sewage |
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| CN102010064A true CN102010064A (en) | 2011-04-13 |
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| CN2009101698857A Pending CN102010064A (en) | 2009-09-08 | 2009-09-08 | Sodium removing technology for secondary processing sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230931A (en) * | 2012-07-23 | 2013-08-07 | 浙江桃花源环保工程有限公司 | Polluted site underground water processing-soil ex-situ leaching restoration integral method |
-
2009
- 2009-09-08 CN CN2009101698857A patent/CN102010064A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230931A (en) * | 2012-07-23 | 2013-08-07 | 浙江桃花源环保工程有限公司 | Polluted site underground water processing-soil ex-situ leaching restoration integral method |
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Application publication date: 20110413 |