CN101157502A - Method for in-situ treatment of eutrophic ground water - Google Patents
Method for in-situ treatment of eutrophic ground water Download PDFInfo
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- CN101157502A CN101157502A CNA2007100712538A CN200710071253A CN101157502A CN 101157502 A CN101157502 A CN 101157502A CN A2007100712538 A CNA2007100712538 A CN A2007100712538A CN 200710071253 A CN200710071253 A CN 200710071253A CN 101157502 A CN101157502 A CN 101157502A
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention discloses a method for in-situ treatment of eutrophicated surface water. The method comprises the following steps: firstly, carrier preparation; secondly, semen coicis pre-culture; thirdly, secondary semen coicis culture; fourthly, seedbed preparation, which refers to spreading the semen coicis seeds uniformly according to a proportion of 24.5-25.5 dry weight per/m<2> on wetted seedbed carriers for shoot plants; fifthly, treatment of eutrophicated surface water, namely, when the semen coicis on the seedbed grows 7-10cm tall, transplanting the seedbeds into the surface of a water area to be treated with 0.2-0.3 square meter seedbed/cubic meter water area. The method of the invention adopts the special plant of semen coicis, and can quickly remove nitrogen and phosphorus in eutrophicated water to purify the water quality without the production of secondary pollution.
Description
Technical field
The present invention relates to the method for a kind of enriched surface water resource utilization and ecological management.
Background technology
In recent years, the quantity discharged of China's sanitary sewage improves year by year, and the pressure of B-grade sewage treatment plant causes the potential threat of body eutrophication also in continuous raising.The eutrophication of water body has become one of problem that contemporary many national government and the public pay close attention to the most gradually.An investigation according to United Nations Environment Programme (UNEP) (UNEP) shows that the lake of 30%-40% and reservoir have suffered the influence of eutrophication in various degree in the world.In 131 main lakes of China, the lake that has reached the eutrophy degree has 67, accounts for 51.2%; In 39 representative reservoirs, reach have 12 of eutrophy degree, account for 30%.
Present stage is mainly adopted physics, chemistry and biology and integrated processes to the processing of eutrophication.Utilizing chemical process mainly is to utilize pharmaceutical chemicals to kill algae the period or utilize its chemical ingredients to promote the self-purification capacity of water body at alga eruption.Physical method mainly is the materials that influence water quality that utilization has adsorbing matrix to come nutritive substance such as nitrogen phosphorus in the planar water or a large amount of breedings such as algae in the water to be produced.Biological method be a kind of eco-friendly, can thoroughly effectively handle and method with low cost, the branch of microbial process and plant-microorganism reparation is arranged.Pass through serike, plant can absorb nitrogen phosphorus in the water body on the one hand, also provide carrier and organic nutrient substance on the other hand for microorganism, the root of plant can also play the effect of the nutritive substance in the adsorbed water body simultaneously, and plant degraded easily itself, can not cause secondary pollution, add the starting material that some plant can be used as industry and medicine, the method for therefore utilizing phytoremediation is the important directions of current development.In addition, so far, utilize eutrophication water to come scale operation feed or cash crop not to appear in the newspapers as nutritional resource.Major cause:
(1), eutrophication water pH is higher, nutritional imbalance much has the plant of economic worth can not adapt to growth.Therefore, must just can find plant germplasm strong to eutrophication water adaptability, that biomass big, nitrogen phosphorus is removed the efficient height, had certain economic benefit through a large amount of screening and experiments.
(2), the cost-effective plant floating bed carrier technique that is applicable to scale operation does not break through.So far most investigators adopt plastic foamboard as floating bed, and it is the cost height not only, and also have secondary pollution, are unwell to large-scale production.
Mi Ren (Coix lacrymajabi L) is the ancient a kind of grain medicine dual-purpose plant of China for the annual gramineae plant.Because the production potential of Mi Ren are very big, and are also very big to the demand of nitrogen and phosphorous nutrient.Simultaneously Mi Ren has that growth is fast, output is high, adaptability is strong, the characteristics of grain medicine dual-purpose, trace elements such as rich in proteins, mineral substance, VITAMIN and iron zinc in its body, the hay crude protein content can be up to more than 20%, and plant is a good forage grass of raising various domestic animals and herbivorous fishes.It is conventional Chinese medicine that the seed of Mi Ren contains special component, and effects such as diuresis, invigorating the spleen, tonifying lung, clearing damp heat, consumer edema, row are dense, antidiarrheal are arranged.
Therefore, if can overcome the difficult problem of plantation Mi Ren in eutrophication water, the handling problem that not only can solve sanitary sewage can also realize large-scale planting rice benevolence; Therefore have important Significance for Environment and good economic worth, be worthy to be popularized.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of in-situ treatment of eutrophic ground water, and this method utilizes one meter benevolence of special plant can remove nitrogen phosphorus in the eutrophication water quickly, thereby purifies water, and can not produce secondary pollution.
In order to solve the problems of the technologies described above, the invention provides a kind of method of in-situ treatment of eutrophic ground water, may further comprise the steps:
1), carrier is made: foam beads evenly is set in the flat cloth bag of the sealing that water-absorbing material is made forms the seedbed carrying agent; The height of flat cloth bag is 5～8cm;
2), rice benevolence is cultivated in advance: after rice benevolence seed is soaked in water, place in the incubator again and cultivated under 28～32 ℃ temperature 22～26 hours;
3), rice benevolence second incubation: the rice benevolence seed after the above-mentioned pre-cultivation processing is directly placed in the incubator, under 28～32 ℃ temperature, cultivated 34～38 hours;
4), the seedbed makes: the rice benevolence seed after above-mentioned second incubation is handled is according to 24.5～25.5g dry weight/m
2Ratio evenly be sprinkling upon and train seedling on the carrier of wetted seedbed, make the seedbed of lawn-type;
5), administer enriched surface water: when treating that Mi Ren on the above-mentioned seedbed grows to 7～10cm, described seedbed moved into administered the surface, waters, utilize the root system of Mi Ren to absorb nitrogen and phosphorous nutrient and organic substance superfluous in the water; Administered the waters for every cube and placed 0.2～0.3 square metre of described seedbed.
In step 2 of the present invention) in, water changed once in per about 8 hours.
Improvement as the inventive method: after the step 5), gather in when treating that Mi Ren grows to 90～110cm or every 30～50 days.
Further improvement as the inventive method: Mi Ren's is 15～25cm by harvesting height.
Further improvement as the inventive method: in the step 1), 5000～8000 gram foam beads are set evenly in every cubic metre of flat cloth bag.
Further improvement as the inventive method: earlier the seedbed is fixed on the fixed frame that can float on the water surface, above-mentioned seedbed is positioned over is administered the surface, waters again.
Further improvement as the inventive method: the skin of flat cloth bag is that latticed nylon cloth, internal layer are the spandex material with strong absorptive.
The method of in-situ treatment of eutrophic ground water of the present invention comes down to a kind of method of utilizing meter benevolence to remove nitrogen phosphorus in the eutrophication water.It utilizes artificial carrier's Water cultivating rice benevolence, and the root system by the prosperity of rice benevolence absorbs the nitrogen and phosphorous nutrient in the eutrophication water in a large number, and upwards is transported to roots of plants top; Regularly or the growing height of looking Mi Ren gather in, and with the overground part material transfer of harvesting to the processing of elsewhere pooling of resources, cane can be made livestock and poultry feed or as the raw material of cultivating mushroom.Therefore the method for in-situ treatment of eutrophic ground water of the present invention can be taken away a large amount of nitrogen and phosphorous nutrients, thereby purify water from sewage; Simultaneously can also reduce COD in water body, realize the target of sewage phytoremediation.Compare with traditional improvement method, method of the present invention is set up good circulating system between " environment-plant-animal-mankind "; Non-secondary pollution, and can afforest and beautify environment.
The present invention selects for use outer for latticed nylon cloth, internal layer are that the spandex material with strong absorptive is made carrier, therefore has the characteristics that cost is low, corrosion-resistant, infiltration is strong, is easy to the growth of Mi Ren; Guaranteed that Mi Ren can provide suff water when germinateing.The seedbed is fixed on the fixed frame, can makes the seedbed keep horizontality, the Mi Renneng on the seedbed is evenly grown.When the wave is high by improvement waters surface wind, several fixed frames can be bundled, can prevent effectively that the seedbed is by the threat of stormy waves overturning.The method of in-situ treatment of eutrophic ground water of the present invention also has less investment, maintenance cost is low, quantities is suitable, administrative skill requires advantages such as low; The Mi Ren of gained carries out recycling can also bring certain economic benefits.
The method of in-situ treatment of eutrophic ground water of the present invention adopts the more intense plant of rice this class environmental compatibility of benevolence, and quilt is throughout the country administered all suitable plantings of waters.
Show through our test: the concentration of being administered nitrogen in the waters is 5.0～9.0 o'clock in the concentration of 0.5～20mg/L, phosphorus at 0.05～5mg/L, pH, and rice benevolence can both normal growth, so can absorb the nitrogen phosphorus of surplus in the water body efficiently.Aspect the time, with regard to Hangzhou area, adopt the method for in-situ treatment of eutrophic ground water of the present invention, from April to November rice benevolence can grow well; After harvesting in winter (only staying root), after the plastic greenhouse covering, root can also be grown in 1 year.This green plants of Water cultivating rice benevolence also is a kind of view technology of beautifying the waters that has development potentiality simultaneously, can also bring people fine visual effect when harnessing the river.
The actual regulation effect of method in order to prove in-situ treatment of eutrophic ground water of the present invention, carried out following example of practical application:
Example 1,
Dispose of sewage and take from the tail water of Zhejiang Hangzhou sewage work, as serious rice-nutrient water.Carry out sewage disposal according to the method for in-situ treatment of eutrophic ground water of the present invention and be called the invention group, a blank (promptly not doing any processing) of not establishing plant is called control group.Administered the waters for every cube and placed 0.3 square metre of described lawn.Invention group experiment carries out that water quality has clear improvement after about 60 days: TN reduces 87%, and TP reduces 79%, and concrete numerical value sees Table 1.In addition, plant quality and the safety index of the Mi Ren that gathers in the crops all reach the animal-feed standard, can also provide feed for animal.
Table 1, Mi Ren are to the decontamination effect improving of severe eutrophic water
| The water quality reference index | TN (mg/l) | TP (mg/l) | DP (mg/l) | NH 4 +-N (mg/l) | NO 2 --N (mg/l) | COD Cr(mg/l) | PH |
| Initially | 22.247 | 3.112 | 2.867 | 14.368 | 1.356 | 85 | 8.07 |
| Control group after 60 days | 14.534 | 2.567 | 2.396 | 9.35 | 0.668 | 61 | 7.92 |
| Invention group after 60 days | 2.839 | 0.636 | 0.602 | 2.135 | 0.306 | 48 | 6.81 |
In the table 1: TN represents that total nitrogen, TP represent that total phosphorus, DP represent titanium pigment, NH
4 +-N represents ammonia nitrogen, NO
2 --N represents nitrite nitrogen, COD
CrThe expression chemical oxygen demand (COD), PH represents pH-value.
Example 2,
Dispose of sewage and take from Hua Jiachi water, as the moderate eutrophic water.Handle according to the method for improvement eutrophic water of the present invention and to be called the invention group, a blank (promptly not doing any processing) of not establishing plant is called control group.Administered the waters for every cube and placed 0.27 square metre of described Mi Ren seedbed.Invention group experiment carries out that water quality has clear improvement after about 70 days: TN reduces 75%, and TP reduces 69%, and concrete numerical value sees Table 2.
Table 2, Mi Ren are to the treatment effect of light eutrophic water
| The water quality reference index | TN (mg/l) | TP (mg/l) | DP (mg/l) | NH 4 +-N (mg/l) | NO 2 --N (mg/l) | COD Mn (mg/l) | PH |
| Initially | 2.547 | 0.182 | 0.166 | 1.168 | 0.256 | 13.456 | 8.57 |
| Control group after 70 days | 1.534 | 0.137 | 0.116 | 0.835 | 0.188 | 11.287 | 8.12 |
| Invention group after 70 days | 0.639 | 0.056 | 0.047 | 0.065 | 0.006 | 9.234 | 7.41 |
In the table 2: TN represents that total nitrogen, TP represent that total phosphorus, DP represent titanium pigment, NH
4 +-N represents ammonia nitrogen, NO
2 --N represents nitrite nitrogen, COD
MnExpression potassium permanganate salt index, PH represents pH-value.
Example 3,
Adopt method of the present invention to carry out Linan sewage treatment plant tail water plant ecosystem dephosphorization denitrogenation engineering demonstration, the plant ecosystem of being built goes to fall tail water nitrogen phosphorus efficient and reaches 80%.Utilize rice benevolence floating bed to be planted in the intensive recycling treatment subsystem of the tail water district, we find that meter benevolence plant-growth is vigorous, if do not gather in, plant height can reach more than 2 meters.Fast every day vegetative period phase every square metre of dry-matter accumulation 138 grams, nitrogen accumulation 8 grams, phosphorus 0.5 gram (table 3).Rice benevolence is removed the efficiency ratio aquatic macrophyte such as the Canna generalis Bailey of nitrogen phosphorus in the sewage and is wanted high more than 2 times again.
Table 3, Mi Ren grow and nitrogen phosphorus accumulation ability in Linan sewage treatment plant tail water (serious rice-nutrient water body)
| The transplanting phase | Transplanted back 15 days | Transplanted back 30 days | Transplanted back 45 days | Transplanted back 60 days | |
| Dry weight (g/m 2) | 6.25 | 71.00 | 395.78 | 2308.8 | 4390.4 |
| Phosphorus content (%) | 0.13 | 0.20 | 0.28 | 0.34 | 0.35 |
| Nitrogen content (%) | 2.49 | 2.97 | 3.21 | 3.78 | 4.52 |
| Phosphorus accumulation volume (g/m 2) | 0.01 | 0.14 | 1.11 | 7.85 | 15.37 |
| Nitrogen accumulation (g/m 2) | 0.16 | 2.11 | 12.70 | 87.27 | 198.45 |
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the structural representation of employed fixed frame in the method for the present invention.
Embodiment
The method of embodiment 1, a kind of in-situ treatment of eutrophic ground water, carry out following steps successively:
1), carrier is made:
At first adopt latticed nylon cloth to be sewn into 1.5 meters wide, 4.0 rice is long, 0.08 the flat cloth bag that rice is high, at the bibulous spandex material of the upper and lower surface liner of cloth bag, foam beads evenly is set in cloth bag again, generally is controlled at 5000～8000 gram foam beads evenly are set in every cubic metre the cloth bag; On cloth bag, evenly add some lines of seam at last, cloth bag is divided into several zonules, play fixedly to shakeout cloth bag, move with the foam beads that prevents the cloth bag the inside.Like this, the seedbed carrying agent has just been made.
2), make fixed frame:
As shown in Figure 1, fixed frame is the rectangle 1 of wide 1.5 meters and long 4.0 meters, is that the pvc pipe system of enclosing by external diameter 8cm forms.In this rectangle 1, pasting the bottom of rectangle 1, every 80cm be provided with 1 wide 3 centimetres, long 1.5 meters, high 2 centimetres mao bamboon bar 2 supports.
The fixed frame of Xing Chenging can float on the water surface like this; When the seedbed carrying agent is placed thereon, can guarantee that the seedbed carrying agent is fixed straightly.
3), rice benevolence is cultivated in advance: after rice benevolence seed is soaked in water, place in the incubator in cultivating about 24 hours under 28～32 ℃ the temperature again; In these 24 hours, to change one time water every 8 hours.
4), rice benevolence second incubation: outwell the water that soaks seed, the rice benevolence seed that is about to after above-mentioned pre-cultivation is handled directly places in the incubator, in cultivating about 36 hours under 28～32 ℃ the temperature; In these 36 hours, to stir meter benevolence seed once every 8 hours, in case stop bit is bad and rotten in following rice benevolence seed air permeability.After these 36 hours, there are many seeds to germinate.
5), the seedbed makes: the rice benevolence seed after above-mentioned second incubation is handled evenly is sprinkling upon trains seedling on the carrier of wetted seedbed, makes the seedbed of lawn-type, then the very thin peat of lid layer in the above; The sowing ratio is: the rice benevolence planting seed of per 25 gram dry weights is on 1 square metre seedbed carrier; The rice benevolence seed of dry weight refers to the rice benevolence seed before the pre-cultivation.The training seedling will also need timely moisturizing about 30 ℃, carry out under the competent illumination condition, finally makes the evenly lawn of growth of seedling.
6), administer enriched surface water: when treating that Mi Ren on the above-mentioned seedbed grows to 7～10cm (about 4 leaves), this seedbed is moved on on the fixed frame; Can seedbed and fixed frame be fixed with band; This seedbed is moved into together with fixed frame again and administered the surface, waters, Mi Ren just can be by the growth of bubbling through the water column of carrying agent system like this.On the big water surface, can also hitch several fixed frames mutually, can prevent stormy waves; Because can form Mi Ren in blocks like this, in case Mi Ren is subjected to stormy waves after growing tall and lodges.
Utilize the root system of Mi Ren to absorb nitrogen and phosphorous nutrient and organic substance in the water, with nutritive salt in the in-situ extraction eutrophication surface flow water body, reduce nitrogen phosphorus isoconcentration in the water body, root system discharges allelochemicals in addition, to suppress algal grown; Thereby reach the purpose of administering eutrophic water.Administered the waters for every cube and placed 0.2～0.3 square metre of described seedbed.
Gather in when 7), treating that Mi Ren on the seedbed grows to 90～110cm or every 30～50 days.During harvesting, prescind the height of 15～25cm at every turn.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (6)
1. the method for an in-situ treatment of eutrophic ground water is characterized in that may further comprise the steps:
1), carrier is made: foam beads evenly is set in the flat cloth bag of the sealing that water-absorbing material is made forms the seedbed carrying agent; The height of described flat cloth bag is 5～8cm;
2), rice benevolence is cultivated in advance: after rice benevolence seed is soaked in water, place in the incubator again and cultivated under 28～32 ℃ temperature 22～26 hours;
3), rice benevolence second incubation: the rice benevolence seed after the above-mentioned pre-cultivation processing is directly placed in the incubator, under 28～32 ℃ temperature, cultivated 34～38 hours;
4), the seedbed makes: the rice benevolence seed after above-mentioned second incubation is handled is according to 24.5～25.5g dry weight/m
2Ratio evenly be sprinkling upon and train seedling on the carrier of wetted seedbed, make the seedbed of lawn-type;
5), administer enriched surface water: when treating that Mi Ren on the above-mentioned seedbed grows to 7～10cm, described seedbed moved into administered the surface, waters, utilize the root system of Mi Ren to absorb nitrogen and phosphorous nutrient and organic substance superfluous in the water; Administered the waters for every cube and placed 0.2～0.3 square metre of described seedbed.
2. the method for in-situ treatment of eutrophic ground water according to claim 1 is characterized in that: after the described step 5), gather in when treating that described rice benevolence is grown to 90～110cm or every 30～50 days.
3. the method for in-situ treatment of eutrophic ground water according to claim 2, it is characterized in that: Mi Ren's is 15～25cm by harvesting height.
4. the method for in-situ treatment of eutrophic ground water according to claim 3 is characterized in that: in the step 1), 5000～8000 gram foam beads are set evenly in every cubic metre of flat cloth bag.
5. the method for in-situ treatment of eutrophic ground water according to claim 4 is characterized in that: earlier the seedbed is fixed on the fixed frame that can float on the water surface, above-mentioned seedbed is positioned over is administered the surface, waters again.
6. the method for in-situ treatment of eutrophic ground water according to claim 5, it is characterized in that: the skin of described flat cloth bag is that latticed nylon cloth, internal layer are the spandex material with strong absorptive.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100712538A CN101157502A (en) | 2007-09-17 | 2007-09-17 | Method for in-situ treatment of eutrophic ground water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104229997A (en) * | 2014-08-21 | 2014-12-24 | 四川农业大学 | Method for in-situ repair of eutrophic water body by using coix aquatic roxn |
| CN110627216A (en) * | 2019-09-16 | 2019-12-31 | 武汉市天泉慧源环保科技有限公司 | Submerged turf planting method for improving ecology of hard riverways and pond ponds |
-
2007
- 2007-09-17 CN CNA2007100712538A patent/CN101157502A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104229997A (en) * | 2014-08-21 | 2014-12-24 | 四川农业大学 | Method for in-situ repair of eutrophic water body by using coix aquatic roxn |
| CN104229997B (en) * | 2014-08-21 | 2015-10-28 | 四川农业大学 | Utilize the method for Coix aquatica in-situ immobilization eutrophication water |
| CN110627216A (en) * | 2019-09-16 | 2019-12-31 | 武汉市天泉慧源环保科技有限公司 | Submerged turf planting method for improving ecology of hard riverways and pond ponds |
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