CN102020358B - Application of centella asiatica in treatment of livestock and poultry breeding wastewater - Google Patents

Application of centella asiatica in treatment of livestock and poultry breeding wastewater Download PDF

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Publication number
CN102020358B
CN102020358B CN2010106082651A CN201010608265A CN102020358B CN 102020358 B CN102020358 B CN 102020358B CN 2010106082651 A CN2010106082651 A CN 2010106082651A CN 201010608265 A CN201010608265 A CN 201010608265A CN 102020358 B CN102020358 B CN 102020358B
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breeding wastewater
herba centellae
livestock breeding
livestock
plant
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CN102020358A (en
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阳路芳
邓仕槐
黄鑫
沈飞
李黎
王应军
肖鸿
彭宏
张延宗
李远伟
张小洪
漆辉
伍钧
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Sichuan Agricultural University
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Sichuan Agricultural University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention discloses a method for treating livestock and poultry breeding wastewater, which comprises: planting centella asiatica in a livestock and poultry breeding wastewater polluted environment. Because the centella asiatica has the characteristics of absorbing and removing pollutants, such as total nitrogen, total phosphorus, ammonia nitrogen and the like, from the livestock and poultry breeding wastewater, the centella asiatica is planted in the livestock and poultry breeding wastewater polluted environment to absorb and remove the pollutants, such as total nitrogen, total phosphorus, ammonia nitrogen and the like, from the livestock and poultry breeding wastewater so as to fulfill the aim of purifying the livestock and poultry breeding wastewater. Because the centella asiatica has great vitality and does not need to be specially managed in the growing process thereof, the method is low in cost and low in operation fee and has a good effect and strong operability; at the same time, the centella asiatica has relatively high medicinal values, can be used as medicaments entirely and has the effects of clearing heat, promoting diuresis, dispelling swelling, detoxifying and treating acute filthy diseases, stomachache, heat diarrhea, dysentery, damp and hot jaundice, difficulty and pain in micturition, haematemesis, hemoptysis, hot eyes, swollen throat, rubella, acariasis, boils, pyogenic infections, traumatic injury and the like.

Description

The application of Herba Centellae in handling livestock breeding wastewater
Technical field
The invention belongs to the natural biology degradation technique field of livestock breeding wastewater, the particularly application of Herba Centellae in handling livestock breeding wastewater.
Background technology
Livestock breeding wastewater pollutes and has chronicity and non-reversibility, and its features of pollution is high suspended matter, high organism and high ammonia nitrogen, and biodegradability is strong, and stink is big.
Poultry industry is the important component part of China's agricultural and rural economy; It also is the one of the main reasons that causes China's rural area pollution of area source; It is serious day by day that livestock and poultry breeding industry is greatly developed the problem of environmental pollution that is brought; Not only influence Economic development, and jeopardize ecological security, become the social concern of people's common concern.The severe contamination that ight soil that livestock and poultry farm produces and sewage cause surface water, underground water, soil and ambient air has directly influenced people's healthy and ordinary production life.The method of handling the livestock breeding wastewater pollution at present mainly contains natural biology degradation technique (like soil treating, oxidation pond processing, artificial swamp processing etc.), anaerobic treatment technology (like anaerobic filter, up-flow anaerobic sludge blanket, flow lifting type solid reactor etc.), aerobic treatment technology (like biological filter, blodisc, sequencing batch active sludge, A/O technology and oxidation ditch etc.) etc.These methods all have certain characteristics, and can reduce the pollution level of livestock breeding wastewater to a certain extent.
Adopt anaerobism or aerobic biologic treating technique, its effluent quality is difficult to reach corresponding emission standard, lets alone sewage comprehensive discharge primary standard, if adopt compulsory physical chemistry measure intensifying treatment effect, often cost is too high.And natural biology degradation technique, the particularly characteristics of artificial swamp treatment technology can remedy the limitation that the aquaculture economic capability is limited, lack the technician that certain operation and level of management are arranged just, especially are fit to be located in the plant of Rural areas.Adopt the artificial swamp treatment technology to strengthen the treatment effect of livestock breeding wastewater pollution treatment system, a kind of suitable treatment technology of can yet be regarded as.
The artificial swamp treatment technology is a method of utilizing ecological engineering; The specific wetland plant of plantation is set up artificial Wetlands ecosystems on certain filler, when water passes through system; Pollution substance wherein and nutritive substance are absorbed by system or decompose, and water quality is purified.Beginning of the nineties late 1980s; Held the artificial swamp conference of disposing of sewage in succession in the U.S., Britain; Proposed the relevant purification mechanism of artificial swamp and design specifications and the data that some can be for reference, indicated that artificial swamp gets into environmental science as a kind of Sewage treatment systems that shows unique characteristics.In recent years, researchs such as the practical applications of artificial swamp and purification mechanism more and more receive people's attention.Artificial swamp can not only effectively be removed suspended substance, organic pollutant, nitrogen and the phosphorus etc. in the sewage; And can effectively remove exogenous bioactive substances such as pathogenic bacteria, heavy metal, algae toxin; It is low to have construction cost, and power consumption is few, and working cost is low and effective and do not cause multifrequency nature such as secondary pollution; Higher nitrogen, tp removal rate are not only arranged, also have the effect of beautifying the environment.Along with water pollute become whole world people one of the serious environmental problem that will face; Artificial swamp has obtained long term growth because of its special advantages; Especially shown great potentiality in polluting purifying livestock breeding wastewater, become and begin the research focus paid close attention in recent years.
Wetland plant is the important component part of artificial swamp, and being used at present to handle the plant that livestock breeding wastewater pollutes has FENGCHECAO, chrysanthemum Canna generalis Bailey, wilson iris, calamus, wild rice stem, reed etc.But in the face of the present serious day by day problem of bringing of livestock breeding wastewater pollution of greatly developing owing to livestock and poultry cultivation; Above-mentionedly can be used for handling the plant variety resource that livestock breeding wastewater pollutes and seem very limited; Be difficult to satisfy actual needs; Still await further reasonable development and can be used in a large number handling the plant variety resource that livestock breeding wastewater pollutes, to adapt to the needs of wastewater treatments such as different areas, different quality soil property.
In addition; The plant that present great majority are used to purify waste water is an annual herb, and winter hardiness is poor, and winter is withered; This has not only influenced the decontamination effect improving of winter to livestock breeding wastewater; And in the litter entering water, can bring secondary pollution to water body, thereby cause undesirable to the decontamination effect improving of livestock breeding wastewater in the winter time.
Herba Centellae ( Centella asiaticaL.) another name collapses jorum, Herba Calthae Membranaceae, crow bowl, copper coin grass, Longhairy Antenoron Herb, money teeth groove, iron oil lamp.Perennial herb, stem is crawled, and is elongated, takes root on the joint.Blade is membranous to herbaceous stem, circle, kidney shape or the shape of a hoof, and long 1-2.8 centimetre, wide 1.5-5 centimetre, there is crenation at the edge, the wealthy heart of base portion, the two sides does not have hair or dredges living pubescence on the train of thought overleaf; Palmate vein 5-7, two sides protuberance, arteries and veins top bifurcated; The long 1.5-27 of petiole centimetre is not had hair or pubescence is arranged at top, and the base portion leaf sheath is transparent, and is membranous.2-4 on umbel stalk, consor long 0.2-1.5 centimetre, has or does not have hair in axil; Bract is common 2, and seldom 3, avette, membranous, long 3-4 millimeter, wide 2.1-3 millimeter; Each umbel has colored 3-4, assembles to be head flower stockless or the short handle of 1 millimeters long is arranged; Petal is avette, and red-purple or oyster white are membranous, long 1.2-1.5 millimeter, wide 1.1-1.2 millimeter; Style is about 0.6 millimeter filigree and is shorter than petal, and is isometric with style.Fruit two flat-sided pressures, orange, base portion is heart-shaped to truncate shape, long 2.1-3 millimeter, wide 2.2-3.6 millimeter, every side have vertical rib several, tangible small crossvein is arranged between rib, netted, surperficial hairiness or smoothly.The flowering fruit bearing stage 4-10 month.Substep in Shaanxi, provinces and regions such as Jiangsu, Anhui, Zhejiang, Jiangxi, Hunan, Hubei, Fujian, Taiwan, Guangdong, Guangxi, Sichuan, Yunnan.Dark and damp meadow or limit, ditch are born in happiness; Height above sea level 200-1900 rice.Non-in India, Sri Lanka, Malaysia, Indonesia, archipelago, Oceania, Japan, Australian the reaching, South Africa (Azania) also has distribution.
The application of Herba Centellae is following: (1) is edible: the Herba Centellae quality is tender, good palatability, can eat raw, often it is drunk as cold tea in that China south is among the people, and is all that Herba Centellae is edible as vegetables on South East Asia and other places; (2) lawn: the Herba Centellae creeper is taken root successively, leaf grace, grass layer are smooth and fine and close, has higher value of beautifying with environment purification.Its vitality is strong, be easy to breeding, becomes the level ground fast, and viewing period is long, is convenient to manage.Use it in the turf establishment, both overcome evergreen kind of problem of getting over the summer difficulty in south of cold ground type, avoided the short shortcoming of some warm ground type grass seeds green periods again; (3) cover plant: Herba Centellae can form the fine and close face of land and cover, and has the good effect that prevents the soil erosion, can be used for conserving water and soil, and prevents moisture evaporation in the soil; (4). medicinal: the Herba Centellae all herbal medicine, clearing away heat-damp and promoting diuresis, subduing swelling and detoxicating control that acute diseases such as cholera and sunstroke xenon stomachache, administration are rushed down, dysentery, jaundice due to damp-heat, sand drenches, and haematemesis, hemoptysis, hot eyes, larynx are swollen, rubella, mange, malignant boil carbuncle pyogenic infections, wound etc.
Summary of the invention
The contriver finds that Herba Centellae can effectively reduce ammonia nitrogen, total phosphorus, total nitrogen, COD in the livestock breeding wastewater in long-term great deal of experimental process CrDeng the content of pollutent, purify livestock breeding wastewater thereby be expected to be used for the artificial swamp treatment technology; Therefore, the objective of the invention is to handle the insufficient problem of plant resources that livestock breeding wastewater pollutes, provide a kind of new can be used for to handle the plant resources that livestock breeding wastewater pollutes to can be used in the above-mentioned prior art; Plant resources provided by the invention has that planting cost is low, maintenance cost is low, workable, characteristics such as treatment effect is good.
In order to realize the foregoing invention purpose, the technical scheme below the present invention has adopted:
The application of Herba Centellae in handling livestock breeding wastewater is characterized in that: on the artificial swamp bed of packings of introducing livestock breeding wastewater, plant Herba Centellae, form artificial wet land system, livestock breeding wastewater is carried out purifying treatment.
Utilize Herba Centellae to the ammonia nitrogen (NH in the livestock breeding wastewater 4 +– N), total phosphorus (TP), total nitrogen (TN), chemical oxygen demand (COD Cr) wait pollutent to adsorb and remove, reach the purpose that purifies livestock breeding wastewater.
Said Herba Centellae is adopted the piecemeal method for transplanting when plantation.
Said Herba Centellae adopts creeper to bury native planting method when plantation.
Said Herba Centellae is adopted seeding method when plantation.
Described Herba Centellae is in the application of handling livestock breeding wastewater, and concrete steps are following:
(1) transplant Herba Centellae:
Under the natural condition, with Herba Centellae seedling direct transplanting to the artificial swamp bed of packings;
(2) stablize plant,
Under the natural condition, water is stable transplanted the Herba Centellae plant 15 days;
(3) utilize artificial swamp to handle livestock breeding wastewater:
After treating that plant is stable, make livestock breeding wastewater flow into kind of an artificial wet land system that is implanted with Herba Centellae and handle.
The artificial swamp bed of packings comprises gravel bed, sand bed, pedosphere described in the step (1); The bottom of bed of packings is provided with water pipe; The water pipe top is equipped with the gravel bed that thickness is 5cm; The diameter range of said gravel is 2-5cm, and laying depth is the sand bed of 10cm on the gravel bed, and sand bed upper berth thickness is the pedosphere of 10cm.
Utilize artificial swamp to handle in the step (3) and pass through in the livestock breeding wastewater process to gather under the different flooding quantitys of water determination, the different hydraulic detention time condition, artificial wet land system is to the NH4 in the sewage +-N, COD Cr, pollutents such as TP, TN removal effect, to confirm the best flooding quantity and the optimal water power standing time of pouring livestock breeding wastewater.
By laboratory test results, livestock breeding wastewater is 7 days at the optimal water power standing time that kind is implanted with in the artificial wet land system of Herba Centellae, and the best flooding quantity of best flooding quantity calculates by following formula:
In the formula: Q--designs wastewater flow, m 3/ d;
The land area that the F--artificial swamp takies, hm 2
The q--hydraulic load, in m/ week, getting q is 20cm/d;
T--working time (whole year operation week number), week/a;
0.0365--reduction factor.
Herba Centellae is suitable for acid rich soil, and its vitality is very vigorous, is prone to into alively, can carry out direct transplanting; Can survive under field conditions (factors), in its whole growth process, need not carry out special management; Can be through the top of regular toothing harvesting plant, its root can continue survival, growth, and the natural propagation growth is fast, does not need annual plantation, and is simple in operation; Simultaneously, Herba Centellae has higher pharmaceutical use, all herbal medicine, and clearing away heat-damp and promoting diuresis, subduing swelling and detoxicating, acute diseases such as cholera and sunstroke xenon stomachache, administration rush down, dysentery, jaundice due to damp-heat, sand are drenched, and haematemesis, hemoptysis, hot eyes, larynx are swollen, rubella, mange, malignant boil carbuncle pyogenic infections, wound etc.
And, can effectively remove ammonia nitrogen in the livestock breeding wastewater, total phosphorus, total nitrogen, COD through regularly measuring to collection water sample in the livestock breeding wastewater of having planted Herba Centellae and to its effluent quality CrThe content of pollutents such as (chemical oxygen demands that adopts SRM 935a to determine) as oxygenant, thus purify livestock breeding wastewater.
The present invention is used to handle the Herba Centellae of livestock breeding wastewater, is umbelliferae Centella per nnial herb, mainly total nitrogen, total phosphorus, ammonia nitrogen etc. in the livestock breeding wastewater is had absorption and removes characteristic.The present invention has made full use of Herba Centellae to ammonia nitrogen, total phosphorus, total nitrogen, COD in the above-mentioned livestock breeding wastewater CrAbsorption and removal characteristic Deng pollutent are transplanted in the livestock breeding wastewater contaminate environment ammonia nitrogen, total phosphorus, total nitrogen, COD in the absorption and accumulation livestock breeding wastewater CrDeng pollutent, thereby reduce ammonia nitrogen, total phosphorus, total nitrogen, COD in the livestock breeding wastewater CrDeng the content of pollutent, during certain biomass to be formed, just can reach and reduce ammonia nitrogen, total phosphorus, total nitrogen, COD in the livestock breeding wastewater CrPurpose Deng the content of pollutent further purifies livestock breeding wastewater.
Compared with prior art, the present invention has following beneficial effect: Herba Centellae mainly has absorption and removes characteristic, effectively ammonia nitrogen, total phosphorus, total nitrogen, COD in the absorption and accumulation livestock breeding wastewater total nitrogen, total phosphorus, ammonia nitrogen etc. in the livestock breeding wastewater CrDeng pollutent, thereby reduce ammonia nitrogen, total phosphorus, total nitrogen, COD in the livestock breeding wastewater CrContent Deng pollutent; Herba Centellae is a perennial plant, and vitality is very vigorous, is easy to into alively, does not need annual plantation, in its whole growth process, need not carry out special management, thus cost is low, working cost is low, effective, workable; New plant resource variety has been developed in the processing of also polluting for livestock breeding wastewater simultaneously, and the deep development of handling the livestock breeding wastewater pollution for constructed wetland plant has brought new progress and development space.
Description of drawings
Fig. 1 is that Herba Centellae is to NH4 in the livestock breeding wastewater +The treatment effect synoptic diagram of – N;
Fig. 2 is the treatment effect synoptic diagram of Herba Centellae to TP in the livestock breeding wastewater;
Fig. 3 is the treatment effect synoptic diagram of Herba Centellae to TN in the livestock breeding wastewater;
Fig. 4 is that Herba Centellae is to COD in the livestock breeding wastewater CrThe treatment effect synoptic diagram.
Embodiment
Below in conjunction with Test Example and embodiment the present invention is made further detailed description.But should this be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment, allly all belong to scope of the present invention based on the technology that content of the present invention realized.
Embodiment 1:
Present embodiment is the concrete grammar that Herba Centellae is handled livestock breeding wastewater, may further comprise the steps:
(1) transplant Herba Centellae:
Under the natural condition; With the paramount 29cm of Herba Centellae seedling direct transplanting, in the rubber bucket of footpath, end 26cm, high 32cm, water distributor is established in the bottom of said rubber bucket; The gravel about diameter 2-5cm is placed in the bottom; Thickness is 5cm, and its upper berth thickness is the sand bed of 10cm, and thickness is the 10cm pedosphere of (counting roughly 8kg) on the sand bed upper berth at last;
(2) stablize plant:
Under the natural condition, water is stable transplanted the Herba Centellae plant 15 days;
(3) utilize artificial swamp to handle livestock breeding wastewater:
After treating that plant is stable, regularly water livestock breeding wastewater, make livestock breeding wastewater flow into kind of an artificial wet land system that is implanted with Herba Centellae and handle.And gather water sample and measure its effluent quality (wherein optimal water power standing time is 7 days); Through measuring under different flooding quantitys, different hydraulic detention time, the different plants number condition potted plant artificial wet land system to the NH4 in the sewage +-N, COD Cr, pollutents such as TP, TN removal effect, confirm that the best flooding quantity of pot experiment is that 2.2L, optimal water power standing time are that the number of Herba Centellae plant is 6 strain/buckets in 7 days, potted plant artificial swamp.
Wherein the pot experiment flooding quantity is measured according to following method: the estimation equation by Reed recommended calculates the pot experiment flooding quantity:
In the formula: Q---design wastewater flow, m 3/ d;
The land area that F---artificial swamp takies, hm 2
K---coefficient, 6.57 * 10 -3
Through calculating, the processing water yield of potted plant experiment is 1.22L.
Certificate
Formula gets, Q=2.2L
In the formula: Q, F are the same;
Q---hydraulic load, in m/ week, getting q is 20cm/d;
T---working time (whole year operation week number), week/a;
0.0365---reduction factor.
It is best flooding quantity that big flooding quantity 2.2L is selected in this experiment for use.
The mechanism that wet land system is removed ammonia nitrogen comprises that the assimilation of plant and mikrobe absorbs.Wetland plant absorbs the nutritive ingredient of a part of inorganic nitrogen as self, is used for organonitrogens such as synthesising plant protein, and then removes through the harvesting of plant.Plant is except directly absorbing pollutent; Also have important indirect action: oxygen is delivered to plant root from top, thereby near plant root, forms an aerobic environment, and along with the increase gradually from the root system distance; Anoxic, anaerobic state appear in the wetland successively; Such conditions favouring is in the growth of nitrifier and denitrifying bacteria, and then the nitrification and denitrification effect of enhancing wetland mikrobe, improves the purification efficiency of nitrogen in the sewage.Duration of test, Herba Centellae its variation tendency that goes out water concentration when influent ammonium concentration significantly increases tends to be steady, and its average purification efficiency reaches 89.11%, and the mean concns of its water inlet and water outlet is 33.98mgL -1And 3.41mgL -1
The existence form of phosphorus mainly contains three kinds in the wetland, i.e. organo phosphorous compounds, insoluble phosphate and soluble phosphate.Organo phosphorous compounds mainly is present in mikrobe and the plant materials, and insoluble phosphate is the main existence form of phosphorus, soluble phosphate be unique can be by the form of mikrobe and plant utilization.Phosphorus is the bioelement of plant-growth, and Herba Centellae is very obvious to the removal efficient of phosphorus, and av eff reaches 85.95%, and the mean concns of its water inlet and water outlet is 14.62mgL -1And 1.83mgL -1With the increase of influent concentration, plant is obviously to the removal efficient of phosphorus more.
The mechanism that wet land system is removed total nitrogen comprises plant absorbing assimilation total nitrogen and the nitrated denitrification of rhizospheric microorganism.At duration of test, the removal efficient of Herba Centellae is apparent in view, on average removes efficient and reaches 75.28%, and the mean concns of its water inlet and water outlet is 58.03mgL -1And 15.25mgL -1Along with the increase of water inlet TN concentration, plant also obviously increases the removal efficient of TN, and the increase removal efficient along with water inlet TN concentration after acquiring a certain degree obviously reduces.This living weight with plant is relevant, and the bigger accumulation ability to N of living weight is strong more, and removal effect is obvious more, and root system of plant is flourishing, and living weight is more greatly one of important measures that improve this system's nitrogen clearance.
Plant mainly is the effect realizations such as decomposition of root system of plant to mikrobe around absorption, absorption and the rhizosphere of dissolved organic matter to organic removal.Be absorbed into the intravital organism of plant and can be degraded to mineral compound.At duration of test, Herba Centellae is to COD in the waste water of livestock poultry CrClearance can reach 90.7%.At duration of test, the continuous rising with influent concentration goes out water concentration and tends towards stability gradually, and the mean concns of its water inlet and water outlet is 696.13mgL -1And 50.65mgL -1
In the whole test stage, Herba Centellae is to ammonia nitrogen, total phosphorus, total nitrogen, COD in the livestock breeding wastewater CrAverage purification efficiency be respectively: 89.11%, 85.95%, 75.28%, 90.7%; Its ammonia nitrogen, total phosphorus, total nitrogen, COD CrDeng the water inlet of pollutent with go out water concentration and see accompanying drawing 1-4 (mensuration of each pollutent and calculate) all with reference to the national standard measuring method.
Visible through the foregoing description, the present invention is utilized in the livestock breeding wastewater contaminate environment and plants Herba Centellae, to removing ammonia nitrogen, total phosphorus, total nitrogen, COD in the livestock breeding wastewater CrHave significant effect Deng pollutent, purify the purpose that livestock breeding wastewater pollutes thereby reach.

Claims (6)

1. the application of Herba Centellae in handling livestock breeding wastewater is characterized in that: on the artificial swamp bed of packings of introducing livestock breeding wastewater, plant Herba Centellae, form artificial wet land system, livestock breeding wastewater is carried out purifying treatment.
2. the application of Herba Centellae according to claim 1 in handling livestock breeding wastewater is characterized in that: said Herba Centellae is adopted the piecemeal method for transplanting when plantation.
3. the application of Herba Centellae according to claim 1 in handling livestock breeding wastewater is characterized in that: said Herba Centellae adopts creeper to bury native planting method when plantation.
4. the application of Herba Centellae according to claim 1 in handling livestock breeding wastewater is characterized in that: said Herba Centellae is adopted seeding method when plantation.
5. the application of Herba Centellae according to claim 1 in handling livestock breeding wastewater is characterized in that concrete steps are following:
(1) transplant Herba Centellae:
Under the natural condition, with Herba Centellae seedling direct transplanting to the artificial swamp bed of packings;
(2) stablize plant,
Under the natural condition, water is stable transplanted the Herba Centellae plant 15 days;
(3) utilize artificial swamp to handle livestock breeding wastewater:
After treating that plant is stable, make livestock breeding wastewater flow into kind of an artificial wet land system that is implanted with Herba Centellae and handle.
6. the application of Herba Centellae according to claim 5 in handling livestock breeding wastewater; It is characterized in that: the artificial swamp bed of packings comprises gravel bed, sand bed, pedosphere described in the step (1); The bottom of bed of packings is provided with water pipe, and the water pipe top is equipped with the gravel bed that thickness is 5cm, and the diameter range of said gravel is 2-5cm; Laying depth is the sand bed of 10cm on the gravel bed, and sand bed upper berth thickness is the pedosphere of 10cm.
CN2010106082651A 2010-12-28 2010-12-28 Application of centella asiatica in treatment of livestock and poultry breeding wastewater Expired - Fee Related CN102020358B (en)

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CN104891622A (en) * 2015-06-22 2015-09-09 缪琼华 Complexing agent for removing phenolic compounds in water
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CN104876317B (en) * 2015-06-22 2016-09-14 缪琼华 A kind of remove the water treatment agent of nitrobenzene compounds in water
CN109734190A (en) * 2019-02-13 2019-05-10 郑州轻工业学院 A kind of high-efficient denitrification and dephosphorization vertical flow constructed wetland device

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