CN106630159A - Method for treating chromium-containing wastewater with low concentration through Leersia hexandra Swartz cultivation - Google Patents
Method for treating chromium-containing wastewater with low concentration through Leersia hexandra Swartz cultivation Download PDFInfo
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- CN106630159A CN106630159A CN201610990416.1A CN201610990416A CN106630159A CN 106630159 A CN106630159 A CN 106630159A CN 201610990416 A CN201610990416 A CN 201610990416A CN 106630159 A CN106630159 A CN 106630159A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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Abstract
The invention relates to a method for treating chromium-containing wastewater with low concentration through Leersia hexandra Swartz cultivation and belongs to the field of wastewater treatment. According to the method, Leersia hexandra Swartz seedlings are utilized to absorb ferrous ions, hexavalent chromium is firstly reduced into trivalent chromium by the aid of the ferrous ions, water molecules around chromium ions are adsorbed by hydrophilic carboxyl in cultivating soil, the chromium ions are enabled to be exposed, finally, the exposed chromium ions are adsorbed and enriched through photosynthesis of Leersia hexandra Swartz and by root hair and stems of the Leersia hexandra Swartz, and accordingly, the purpose of chromium-containing wastewater treatment is achieved; the method for treating the chromium-containing wastewater adopts a simple treatment process and available raw materials, has high removal rate of the chromium-containing wastewater with low concentration, produces no secondary pollution and has broad application prospect.
Description
Technical field
The present invention relates to a kind of method that Leersia Sw cultivation processes low-concentration chromate waste water, belongs to waste water treatment field.
Background technology
Chromium is a kind of main pollutant in environment, and its important sources are exactly electroplating wastewater.With science and technology
Development, the scale of electroplating industry is increasing, and the chromate waste water amount of discharge is consequently increased, if effectively do not processed,
Greatly harm will be caused to environment.Valence state of the chromium in water environment is more, mainly based on trivalent chromium and Cr VI.Cr VI
Toxicity it is stronger, be generally acknowledged carcinogen, have high risks to human body.Trivalent chromium toxicity is weaker, is that a kind of humans and animals are required
Trace element.
The processing method of chromate waste water can be divided into three major types according to the key link adopted in processing procedure：Physical,
Chemical method and bioanalysises.Absorption method is that the chromium in chromate waste water is adsorbed in into surface using porous adsorbent, is reached from water
Detached purpose.But most of adsorbent needs to be used under the conditions of comparatively acidic, and adsorption time is longer, and the rate of adsorption is relatively low,
Adsorption capacity is not high, and absorption method is that chromium is transferred to from water body adsorbent surface, the adsorbent after adsorption saturation
Waste liqouor or harmless treatment must be carried out, if dealing with improperly, easily causes secondary pollution.The original of chemical Treatment chromate waste water
Manage under proper condition, the higher chromium of toxicity to be reduced into into low price chromium using chemical reducing agent, the shape for making chromium ion to precipitate
Formula is removed from water body, reaches the purpose of solid-liquid separation, the discharged wastewater met the national standard after process.Chemical precipitation method is produced and contain in a large number chromium
Sludge, if without dealing carefully with, secondary pollution will be caused to environment.Biochemical method chromate waste water is mainly by artificial sieve
Choosing, purification, turn out and can reduce or adsorb the function stem of chromium ion and be prepared into biological reductant or biological flocculant is used.
Prior art shows higher removal efficiency when high concentration heavy metal pollution is processed, but low concentration and it is near in
Under the conditions of property, removal efficiency is decreased obviously.Biosorption technology is to pass through physico-chemical process using organism or natural biology
Remove soil and the heavy metal in water body.Biosorption technology has the characteristics that compared with other common technologies：Biosorption process
With at low concentrations process heavy metal effect it is good, adsorption capacity is big, speed is fast, adsorption plant is simple, it is easy to operate the features such as, weight
Want, biological adsorption agent raw material sources are extensive, low price, have many to be industry, agricultural, the garbage of forestry.Used
The purpose of the treatment of wastes with processes of wastes against one another is can reach in the process of sewage, while being conducive to reclaiming valuable heavy metal.
The content of the invention
Present invention mainly solves technical problem, at present common processing method when high-concentration chromium-containing wastewater is processed
Higher removal efficiency is shown, but under low concentration and near-neutral sulfite deinking, removal efficiency is decreased obviously, and most treatment effect is not
It is good, be also easy to produce the defect of secondary pollution, there is provided a kind of ferrous culture fluid of utilization sulfur acid cultivates Leersia Sw seedling, then by its
Plant in the soil of the cultivation rich in hydrophilic matrix, the method with enriching heavy metal chromium, present invention profit are absorbed using Leersia Sw
Ferrous ion is absorbed with Leersia Sw seedling, cultivating soil is recycled into trivalent chromium first by hexavalent chrome reduction by ferrous ion
In hydrophilic carboxylic hydroxyl the hydrone around chromium ion is adsorbed, make chromium ion exposed, finally using the light of Leersia Sw
Cooperation with and root hair and stem absorption enrichment is carried out to exposed chromium ion, reach the purpose of processing waste water containing chrome, the present invention
The method of processing waste water containing chrome, handling process is simple, and raw material is easy to get, and high to the removal efficiency of low-concentration chromate waste water, does not have
Any secondary pollution is produced, and is had broad application prospects.
In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）The Leersia Sw seed deionized water of selection full grains is taken out after soaking 2～3 days, and the seed after immersion is sowed
In entering the soil turned over, when germination length is to 5～7cm of plant height, Leersia Sw Seedling is taken out, greenhouse is moved it into, in temperature
Under conditions of 20～25 DEG C, 8～10h of light application time, 1300～1400Lux of intensity of illumination and relative air humidity 60～70%
Cultivate to 8～10cm of height of seedling；
（2）Count by weight, weigh 90～92 parts of calcium nitrates, 50～55 parts of potassium nitrate, 11～12 parts of ammonium dihydrogen phosphates and 10
～20 parts of ferrous sulfate are dissolved in 1000～1500 parts of distilled water, culture fluid are obtained after being stirred with Glass rod, by above-mentioned temperature
The seedlings of cereal crops after cultivating in room are moved in culture fluid, continue to cultivate 7～10 days under room temperature, until a large amount of white palpuses occurs in seedlings of cereal crops root
Root, obtains the pretreatment seedlings of cereal crops, standby；
（3）Dig out the process of continuous 3 long 20m, width 10m and depth 1.5m from top to bottom on the slope that the gradient is 10 °～20 °
Pond, it is 1,2, No. 3 processing ponds from top to bottom successively to number processing pond, with the steel pipe of a diameter of 1m between every two neighboring processing pond
It is connected, and outlet is set in No. 3 processing ponds；
（4）Count by weight, weigh 50～60 parts of bed-silts, 5～10 parts of hyaluronic acids, 3～5 parts of Fructus Ananadis comosis, 8～10 parts of water
Accumulate and banked up fermentation 14～20 days after grass mixing, by fermented product and black soil of Northeast China by waiting mass ratio to be planted after mixing after fermentation ends
Ridging earth；
（5）Uniform laying depth is the above-mentioned cultivating soil of 0.5m in each processing pond, and the standby pretreatment seedlings of cereal crops are pressed into 80
～85 plants/m2Planting density planted, whne Leersia Sw length to plant height be 90～120cm when, to No. 1 processing pond implantation concentration
For 430～450mg/L chromate waste waters, waste water realizes connection by the steel pipe between processing pond, until filling waste water in No. 1 processing pond
After stop water filling, absorption enrichment is carried out to chromium ion in waste water by the photosynthesis and root of Leersia Sw；
（6）After chromate waste water Jing after the Leersia Sw in No. 1 pond is processed 25～30 days, continue to be passed through in No. 1 pond concentration for 430～
450mg/L chromate waste waters, make Jing No. 1 pond the waste water after processing diffuse in No. 2 ponds, continue to process 25 by the Leersia Sw in No. 2 ponds～
30 days, then it is that the chromate waste water after 430～450mg/L chromate waste waters are processed up to No. 2 ponds is diffused in continue to be passed through concentration to No. 1 pond
No. 3 ponds, after continuing with 25～30 days by Leersia Sw in No. 3 ponds, reaching after the water body of discharge is processed in final No. 3 ponds
Mark water.
The application process of the present invention：After chromate waste water Jing after the Leersia Sw in No. 1 pond is processed 25～30 days, continue to No. 1
It is 430～450mg/L chromate waste waters that concentration is passed through in pond, makes Jing No. 1 pond the waste water after processing diffuse in No. 2 ponds, is continued by No. 2 ponds
In Leersia Sw process 25～30 days, then continue to be passed through concentration for 430～450mg/L chromate waste waters until No. 2 Chi Chu to No. 1 pond
Chromate waste water after reason diffuses in No. 3 ponds, after being continued with 25～30 days by Leersia Sw in No. 3 ponds by qualified discharge.
The invention has the beneficial effects as follows：
（1）The processing method that the present invention is provided improves treatment effeciency, the obvious processing effect to low-concentration chromate waste water, Jing inspections
Survey, the chromate waste water after process, Cr6+Concentration 4～5mg/L, Cr are down to by 430 original～450mg/L6+Clearance reach
More than 98.8%；
（2）The processing method that the present invention is provided simplifies processing procedure, saves chemical cost, reduces processing cost.
Specific embodiment
The Leersia Sw seed deionized water of selection full grains is taken out after soaking 2～3 days, and the seed after immersion is sowed
In entering the soil turned over, when germination length is to 5～7cm of plant height, Leersia Sw Seedling is taken out, greenhouse is moved it into, in temperature
Under conditions of 20～25 DEG C, 8～10h of light application time, 1300～1400Lux of intensity of illumination and relative air humidity 60～70%
Cultivate to 8～10cm of height of seedling；Count by weight, weigh 90～92 parts of calcium nitrates, 50～55 parts of potassium nitrate, 11～12 parts of phosphoric acid
Ammonium dihydrogen and 10～20 parts of ferrous sulfate are dissolved in 1000～1500 parts of distilled water, and culture is obtained after being stirred with Glass rod
Liquid, the seedlings of cereal crops after cultivating in above-mentioned greenhouse are moved in culture fluid, continue to cultivate 7～10 days under room temperature, until seedlings of cereal crops root goes out
Now a large amount of white fibrous roots, obtain the pretreatment seedlings of cereal crops, standby；Continuous 3 are dug out from top to bottom on the slope that the gradient is 10 °～20 °
The processing pond of individual long 20m, width 10m and depth 1.5m, it is 1,2, No. 3 processing ponds from top to bottom successively to number processing pond, per adjacent
It is connected with the steel pipe of a diameter of 1m between two processing ponds, and outlet is set in No. 3 processing ponds；Count by weight, weigh
Bank up after 50～60 parts of bed-silts, 5～10 parts of hyaluronic acids, 3～5 parts of Fructus Ananadis comosis, 8～10 parts of waterweeds' mixing fermentation 14～20
My god, after fermentation ends by fermented product and black soil of Northeast China by etc. obtain cultivating soil after mass ratio mixing；In each processing pond
Even laying depth is the above-mentioned cultivating soil of 0.5m, and the standby pretreatment seedlings of cereal crops are pressed into 80～85 plants/m2Planting density carry out
Plantation, is 430～450mg/L chromate waste waters to No. 1 processing pond implantation concentration when Leersia Sw length to plant height is 90～120cm,
Waste water realizes connection by the steel pipe between processing pond, until fill in No. 1 processing pond stop after waste water water filling, by Leersia Sw
Photosynthesis and root carry out absorption enrichment to chromium ion in waste water；Treat Leersia Sw in No. 1 pond of chromate waste water Jing process 25～
After 30 days, continue to be passed through in No. 1 pond concentration for 430～450mg/L chromate waste waters, make Jing No. 1 pond the waste water after processing diffuse in 2
Number pond, continues to be processed 25～30 days by the Leersia Sw in No. 2 ponds, then continues to be passed through concentration to No. 1 pond and contain for 430～450mg/L
Chromate waste water after chrome waste water is processed up to No. 2 ponds diffuses in No. 3 ponds, after being continued with 25～30 days by Leersia Sw in No. 3 ponds i.e.
Can, the water up to standard after the water body of discharge is processed in final No. 3 ponds.
Example 1
Choose full grains Leersia Sw seed deionized water soak 2 days after take out, the seed after immersion is sowed into turning over
In the soil crossed, when germination length is to plant height 5cm, Leersia Sw Seedling is taken out, move it into greenhouse, be 20 DEG C, light in temperature
According to cultivating to height of seedling 8cm under conditions of time 8h, intensity of illumination 1300Lux and relative air humidity 60%；Count by weight,
Weigh 90 parts of calcium nitrates, 50 parts of potassium nitrate, 11 parts of ammonium dihydrogen phosphates and 10 parts of ferrous sulfate to be dissolved in 1000 parts of distilled water, use glass
Glass rod is obtained culture fluid after stirring, and the seedlings of cereal crops after cultivating in above-mentioned greenhouse are moved in culture fluid, continues to cultivate 7 under room temperature
My god, until a large amount of white fibrous roots occurs in seedlings of cereal crops root, the pretreatment seedlings of cereal crops are obtained, it is standby；On the slope that the gradient is 10 ° on and
Under dig out the processing pond of continuous 3 long 20m, width 10m and depth 1.5m, by processing pond numbering be successively from top to bottom at 1,2, No. 3
Reason pond, is connected between every two neighboring processing pond with the steel pipe of a diameter of 1m, and arranges outlet in No. 3 processing ponds；By weight
Number meter, weighs fermentation 14 days of banking up after 50 parts of bed-silts, 5 parts of hyaluronic acids, 3 parts of Fructus Ananadis comosis, 8 parts of waterweed's mixing, fermentation
After end by fermented product and black soil of Northeast China by etc. obtain cultivating soil after mass ratio mixing；Uniform laying is thick in each processing pond
The above-mentioned cultivating soil for 0.5m is spent, the standby pretreatment seedlings of cereal crops are pressed into 80 plants/m2Planting density planted, treat Leersia Sw
It is 430mg/L chromate waste waters to No. 1 processing pond implantation concentration when length to plant height is 90cm, waste water is by the steel pipe between processing pond
Connection is realized, until fill in No. 1 processing pond stop after waste water water filling, by the photosynthesis and root of Leersia Sw in waste water
Chromium ion carries out absorption enrichment；After chromate waste water Jing after the Leersia Sw in No. 1 pond is processed 25 days, continue to be passed through in No. 1 pond dense
Spend for 430mg/L chromate waste waters, make Jing No. 1 pond the waste water after processing diffuse in No. 2 ponds, continue to be processed by the Leersia Sw in No. 2 ponds
25 days, then continue to be passed through concentration for 430mg/L chromate waste waters to No. 1 pond until the chromate waste water after No. 2 ponds are processed diffuses in No. 3
Pond, the water up to standard after continuing with 25 days by Leersia Sw in No. 3 ponds, after the water body of discharge is processed in final No. 3 ponds.
Pending waste water is passed through in No. 1 processing pond, it is first after first processing 25 days to reduce waste strength, obtain middle concentration and give up
Water, then middle concentration waste water is passed through into No. 2 ponds, secondary reduction concentration obtains low concentration wastewater, finally by low concentration wastewater Jing 3
Pond can qualified discharge after processing.The processing method that the present invention is provided improves treatment effeciency, the place to low-concentration chromate waste water
Reason effect is significant, after testing, the chromate waste water after process, Cr6+Concentration 4mg/L, Cr are down to by original 430mg/L6+Go
Except rate is up to 99.06%.
Example 2
Choose full grains Leersia Sw seed deionized water soak 3 days after take out, the seed after immersion is sowed into turning over
In the soil crossed, when germination length is to plant height 6cm, Leersia Sw Seedling is taken out, move it into greenhouse, be 23 DEG C, light in temperature
According to cultivating to height of seedling 9cm under conditions of time 9h, intensity of illumination 1350Lux and relative air humidity 65%；Count by weight,
Weigh 91 parts of calcium nitrates, 53 parts of potassium nitrate, 11 parts of ammonium dihydrogen phosphates and 15 parts of ferrous sulfate to be dissolved in 1300 parts of distilled water, use glass
Glass rod is obtained culture fluid after stirring, and the seedlings of cereal crops after cultivating in above-mentioned greenhouse are moved in culture fluid, continues to cultivate 9 under room temperature
My god, until a large amount of white fibrous roots occurs in seedlings of cereal crops root, the pretreatment seedlings of cereal crops are obtained, it is standby；On the slope that the gradient is 15 ° on and
Under dig out the processing pond of continuous 3 long 20m, width 10m and depth 1.5m, by processing pond numbering be successively from top to bottom at 1,2, No. 3
Reason pond, is connected between every two neighboring processing pond with the steel pipe of a diameter of 1m, and arranges outlet in No. 3 processing ponds；By weight
Number meter, weighs fermentation 17 days of banking up after 55 parts of bed-silts, 8 parts of hyaluronic acids, 4 parts of Fructus Ananadis comosis, 9 parts of waterweed's mixing, fermentation
After end by fermented product and black soil of Northeast China by etc. obtain cultivating soil after mass ratio mixing；Uniform laying is thick in each processing pond
The above-mentioned cultivating soil for 0.5m is spent, the standby pretreatment seedlings of cereal crops are pressed into 83 plants/m2Planting density planted, treat Leersia Sw
It is 440mg/L chromate waste waters to No. 1 processing pond implantation concentration when length to plant height is 105cm, waste water is by the steel pipe between processing pond
Connection is realized, until fill in No. 1 processing pond stop after waste water water filling, by the photosynthesis and root of Leersia Sw in waste water
Chromium ion carries out absorption enrichment；After chromate waste water Jing after the Leersia Sw in No. 1 pond is processed 28 days, continue to be passed through in No. 1 pond dense
Spend for 440mg/L chromate waste waters, make Jing No. 1 pond the waste water after processing diffuse in No. 2 ponds, continue to be processed by the Leersia Sw in No. 2 ponds
28 days, then continue to be passed through concentration for 440mg/L chromate waste waters to No. 1 pond until the chromate waste water after No. 2 ponds are processed diffuses in No. 3
Pond, the water up to standard after continuing with 28 days by Leersia Sw in No. 3 ponds, after the water body of discharge is processed in final No. 3 ponds.
Pending waste water is passed through in No. 1 processing pond, it is first after first processing 30 days to reduce waste strength, obtain middle concentration and give up
Water, then middle concentration waste water is passed through into No. 2 ponds, secondary reduction concentration obtains low concentration wastewater, finally by low concentration wastewater Jing 3
Pond can qualified discharge after processing.The processing method that the present invention is provided improves treatment effeciency, the place to low-concentration chromate waste water
Reason effect is significant, after testing, the chromate waste water after process, Cr6+Concentration 4mg/L, Cr are down to by original 450mg/L6+Go
Except rate is up to 99.11%.
Example 3
Choose full grains Leersia Sw seed deionized water soak 3 days after take out, the seed after immersion is sowed into turning over
In the soil crossed, when germination length is to plant height 7cm, Leersia Sw Seedling is taken out, move it into greenhouse, be 25 DEG C, light in temperature
According to cultivating to height of seedling 10cm under conditions of time 10h, intensity of illumination 1400Lux and relative air humidity 70%；By weight
Meter, weighs 92 parts of calcium nitrates, 55 parts of potassium nitrate, 12 parts of ammonium dihydrogen phosphates and 20 parts of ferrous sulfate and is dissolved in 1500 parts of distilled water,
Culture fluid is obtained after being stirred with Glass rod, the seedlings of cereal crops after cultivating in above-mentioned greenhouse are moved in culture fluid, continued under room temperature
Culture 10 days, until a large amount of white fibrous roots occurs in seedlings of cereal crops root, obtains the pretreatment seedlings of cereal crops, standby；On the slope that the gradient is 20 °
Dig out the processing pond of continuous 3 long 20m, width 10m and depth 1.5m from top to bottom, from top to bottom successively by processing pond numbering be 1,2,
No. 3 processing ponds, are connected between every two neighboring processing pond with the steel pipe of a diameter of 1m, and arrange outlet in No. 3 processing ponds；Press
Parts by weight meter, weighs fermentation 20 of banking up after 60 parts of bed-silts, 10 parts of hyaluronic acids, 5 parts of Fructus Ananadis comosis, 10 parts of waterweed's mixing
My god, after fermentation ends by fermented product and black soil of Northeast China by etc. obtain cultivating soil after mass ratio mixing；In each processing pond
Even laying depth is the above-mentioned cultivating soil of 0.5m, and the standby pretreatment seedlings of cereal crops are pressed into 85 plants/m2Planting density planted,
It is 450mg/L chromate waste waters to No. 1 processing pond implantation concentration when Leersia Sw length to plant height is 120cm, waste water passes through processing pond
Between steel pipe realize connection, until fill in No. 1 processing pond stop after waste water water filling, by the photosynthesis and root of Leersia Sw
Absorption enrichment is carried out to chromium ion in waste water；After chromate waste water Jing after the Leersia Sw in No. 1 pond is processed 30 days, continue to No. 1 pond
In be passed through concentration for 450mg/L chromate waste waters, make Jing No. 1 pond the waste water after processing diffuse in No. 2 ponds, continue by Lee in No. 2 ponds
Family name's standing grain is processed 30 days, then continues to be passed through concentration for 450mg/L chromate waste waters to No. 1 pond until the chromate waste water after No. 2 ponds are processed
No. 3 ponds are diffused in, after continuing with 30 days by Leersia Sw in No. 3 ponds, reaching after the water body of discharge is processed in final No. 3 ponds
Mark water.
Pending waste water is passed through in No. 1 processing pond, it is first after first processing 28 days to reduce waste strength, obtain middle concentration and give up
Water, then middle concentration waste water is passed through into No. 2 ponds, secondary reduction concentration obtains low concentration wastewater, finally by low concentration wastewater Jing 3
Pond can qualified discharge after processing.The processing method that the present invention is provided improves treatment effeciency, the place to low-concentration chromate waste water
Reason effect is significant, after testing, the chromate waste water after process, Cr6+Concentration 5mg/L, Cr are down to by original 450mg/L6+Go
Except rate is up to 98.88%.
Claims (1)
1. a kind of method that Leersia Sw cultivation processes low-concentration chromate waste water, it is characterised in that specifically preparation process is：
（1）The Leersia Sw seed deionized water of selection full grains is taken out after soaking 2～3 days, and the seed after immersion is sowed
In entering the soil turned over, when germination length is to 5～7cm of plant height, Leersia Sw Seedling is taken out, greenhouse is moved it into, in temperature
Under conditions of 20～25 DEG C, 8～10h of light application time, 1300～1400Lux of intensity of illumination and relative air humidity 60～70%
Cultivate to 8～10cm of height of seedling；
（2）Count by weight, weigh 90～92 parts of calcium nitrates, 50～55 parts of potassium nitrate, 11～12 parts of ammonium dihydrogen phosphates and 10
～20 parts of ferrous sulfate are dissolved in 1000～1500 parts of distilled water, culture fluid are obtained after being stirred with Glass rod, by above-mentioned temperature
The seedlings of cereal crops after cultivating in room are moved in culture fluid, continue to cultivate 7～10 days under room temperature, until a large amount of white palpuses occurs in seedlings of cereal crops root
Root, obtains the pretreatment seedlings of cereal crops, standby；
（3）Dig out the process of continuous 3 long 20m, width 10m and depth 1.5m from top to bottom on the slope that the gradient is 10 °～20 °
Pond, it is 1,2, No. 3 processing ponds from top to bottom successively to number processing pond, with the steel pipe of a diameter of 1m between every two neighboring processing pond
It is connected, and outlet is set in No. 3 processing ponds；
（4）Count by weight, weigh 50～60 parts of bed-silts, 5～10 parts of hyaluronic acids, 3～5 parts of Fructus Ananadis comosis, 8～10 parts of water
Accumulate and banked up fermentation 14～20 days after grass mixing, to obtain cultivation after mass ratio mixing native by waiting by fermented product and soil after fermentation ends
Earth；
（5）Uniform laying depth is the above-mentioned cultivating soil of 0.5m in each processing pond, and the standby pretreatment seedlings of cereal crops are pressed into 80
～85 plants/m2Planting density planted, whne Leersia Sw length to plant height be 90～120cm when, to No. 1 processing pond implantation concentration
For 430～450mg/L chromate waste waters, waste water realizes connection by the steel pipe between processing pond, until filling waste water in No. 1 processing pond
After stop water filling, absorption enrichment is carried out to chromium ion in waste water by the photosynthesis and root of Leersia Sw；
（6）After chromate waste water Jing after the Leersia Sw in No. 1 pond is processed 25～30 days, continue to be passed through in No. 1 pond concentration for 430～
450mg/L chromate waste waters, make Jing No. 1 pond the waste water after processing diffuse in No. 2 ponds, continue to process 25 by the Leersia Sw in No. 2 ponds～
30 days, then it is that the chromate waste water after 430～450mg/L chromate waste waters are processed up to No. 2 ponds is diffused in continue to be passed through concentration to No. 1 pond
No. 3 ponds, after continuing with 25～30 days by Leersia Sw in No. 3 ponds, reaching after the water body of discharge is processed in final No. 3 ponds
Mark water.
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| CN201610990416.1A CN106630159A (en) | 2016-11-10 | 2016-11-10 | Method for treating chromium-containing wastewater with low concentration through Leersia hexandra Swartz cultivation |
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| CN201610990416.1A CN106630159A (en) | 2016-11-10 | 2016-11-10 | Method for treating chromium-containing wastewater with low concentration through Leersia hexandra Swartz cultivation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107895798A (en) * | 2017-12-17 | 2018-04-10 | 李巧珍 | A kind of preparation method of carbon nano-fiber lithium ion battery negative material |
| CN115231709A (en) * | 2022-07-20 | 2022-10-25 | 桂林电子科技大学 | Application of iron film in improving super-enriched plant Leersia hexandra Swartz in restoring heavy metal chromium polluted water body |
-
2016
- 2016-11-10 CN CN201610990416.1A patent/CN106630159A/en not_active Withdrawn
Cited By (4)
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| CN107895798A (en) * | 2017-12-17 | 2018-04-10 | 李巧珍 | A kind of preparation method of carbon nano-fiber lithium ion battery negative material |
| CN107895798B (en) * | 2017-12-17 | 2020-03-06 | 佛山能高环保有限公司 | Preparation method of nano carbon fiber lithium ion battery anode material |
| CN115231709A (en) * | 2022-07-20 | 2022-10-25 | 桂林电子科技大学 | Application of iron film in improving super-enriched plant Leersia hexandra Swartz in restoring heavy metal chromium polluted water body |
| CN115231709B (en) * | 2022-07-20 | 2024-04-26 | 桂林电子科技大学 | Application of iron film in improving restoration of heavy metal chromium-polluted water body by super-enriched plant Leersia hexandra |
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Application publication date: 20170510 |