CN107445407A - A kind of waste water treatment system for nursery and its processing method - Google Patents
A kind of waste water treatment system for nursery and its processing method Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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Abstract
The processing system and its processing method of a kind of animal farm wastewater.A kind of processing system of animal farm wastewater, including Ge Shan ﹑ coagulating sedimentation Chi ﹑ Fa Jiao Chi ﹑ sterilization pools, artificial swamp is established between fermentation vat and sterilization pool, the waste water stream enters grid, flow into again in coagulative precipitation tank, the supernatant after precipitation enters in fermentation vat, and the water after fermentation flows into artificial swamp, the supernatant of artificial swamp enters sterilization pool, water outlet.Compared with other method, advantageous effects are the present invention：Flase floor is installed in grid and effectively removes the bigger solid matter of oil removal, the colourity added in grid in decolorising agent reduction waste water, leavening is advantageous to poisonous and harmful substance of degrading in fermentation vat, accelerates sludge deodorization, dehydration, while caused biogas effectively comprehensively utilizes after fermentation, avoid secondary pollution, the plant of artificial swamp can also be that water body conveys oxygen, increase the activity of water body, while wetland plant is in control water pollution, COD ﹑ BOD value is reduced, reaches the effect of denitrogenation dephosphorizing.
Description
Technical field
The invention belongs to field of waste water treatment, and in particular to a kind of processing system of animal farm wastewater and its processing side
Method.
Background technology
With the rapid development of China's livestock and poultry cultivation, the poultry in China, pork, the increase of egg sustained production, scale is supported
Growing field energy enough reduces plant's cost, increases income.But scale also result in the fecaluria concentrations of plant, allow
Plant's surrounding environment subjects immense pressure.How the pollution situation very severe of animal farm wastewater, efficiently handle cultivation
Waste water, the pollution to caused by water body and soil of discharging wantonly of waste water is avoided to have become one and extremely urgent main ask
Topic.
Animal farm wastewater main source：Excrement leachates, place flushing water and urine.Complicated component is characterized in, it is organic
Thing concentration (COD8000 ~ 20000mg/L), suspension (>10000mg/L) and ammonia nitrogen dense (500 ~ 1400mg/L) is all very high, and
Contain certain antibiotic and heavy metal.The method for administering this kind of breeding wastewater mainly has Physical, chemical method, physical-chemical process
(abbreviation physico-chemical process), bioanalysis and its mutual combination technique etc..But in general physico-chemical process be difficult to processing and
Processing cost is high, easily brings secondary pollution, is not suitable for the meagre plant of profit.
Common animal farm wastewater processing mode is the processing mode of anaerobism+aerobic, auxiliary physico-chemical process and naturally processing side
Method.The present invention has found that animal farm wastewater carries out anaerobic digestion reaction, and COD removal rate can on the basis of analysis and experiment
To reach more than 70%, but the aerobic biodegradability of digestive juice is very poor, and further experiment finds to cause this phenomenon main cause
Be in anaerobic digestion process various pollutants degraded it is asynchronous, cause the out of proportion of the nutriments such as C/N, reduce digestion
Liquid biodegradability.For above-mentioned handling process all in the prevalence of sewage decoloring rate is low, harmful substance contents are high, it is secondary to be also easy to produce
The features such as pollution, and the water after processing is unable to qualified discharge.Therefore COD, BOD in a kind of percent of decolourization height, sewage are researched and developed
Clearance is high, animal farm wastewater " zero-emission " treatment technology of non-secondary pollution is imperative.
The content of the invention
The technical problems to be solved by the invention：For current animal farm wastewater handling process generally existing sewage decoloring rate
It is low, it is also easy to produce secondary pollution, the problem of COD, BOD clearance is not high in sewage, there is provided a kind of processing of animal farm wastewater
System and its processing method.
In order to solve the above technical problems, the present invention is using technical scheme as described below：
A kind of processing system of animal farm wastewater, including Ge Shan ﹑ coagulating sedimentation Chi ﹑ Fa Jiao Chi ﹑ sterilization pools, fermentation vat and sterilization pool
Between establish artificial swamp, the waste water stream enters grid, then flows into coagulative precipitation tank, and the supernatant after precipitation enters fermentation vat
In, the water after fermentation flows into artificial swamp, and the supernatant of artificial swamp enters sterilization pool, water outlet.
15 ~ 30mm of gap between flase floor in the grid.
The artificial swamp is to lay antiseep water barrier from bottom surface, fills the packing layer of 20 ~ 30cm depth, packing layer
Filler is pond sludge, surface grafting reed plant.
The method for sludge treatment of the processing system of the animal farm wastewater, this method comprise the following steps：
（1）Waste water is linked into grid, adds decolorising agent, stirring；
（2）Water after decolouring is entered into coagulative precipitation tank, adds coagulant, is stood；
（3）Supernatant after precipitation is flowed into fermentation vat, adds leavening, mixing, caused biogas is comprehensive after fermentation
Close and utilize；
（4）Reed is put into artificial swamp and cultivated, then the water after fermentation is squeezed into artificial swamp and handled；
（5）Water after processing is entered in sterilization pool and sterilized, water outlet.
The step（1）The method that in middle grid prepared by decolorising agent：
A. in mass ratio 1：0.8 ~ 1, calcium carbonate, diatomite are put into colloid mill and ground, 200 ~ 300 mesh sieves is crossed, is mixed
Particle；
B. xylitol, lecithin are put into glucose solution, after standing 10~15min, filtering, obtain filtrate；
C. count in parts by weight, take 70~80 parts of water, 30~40 parts of peptones, 17~23 parts of yeast extracts, 15~20 agar, 4~7
Part bacillus subtilis powder, 5~8 parts of filtrates, stands 10~15min, natural air drying, obtains air dry matter；
D. 3~6 parts of mixed 8~10 parts of a grain ﹑, 70~80 parts of water of air-dried thing ﹑ that close are mixed, filtering, obtains mixture, that is, taken off
Toner
The step（1）The input amount of decolorising agent is the 20% ~ 30% of breeding wastewater quality in middle grid.
The step（2）Coagulant in middle coagulative precipitation tank is that San Lvization Tie ﹑ Ju conjunction Lvization Lv ﹑ aluminum sulfate is any one
Kind, input amount is 25% ~ 30% of wastewater quality after decolouring.
The step（3）The preparation method of leavening in middle fermentation vat：
A. count in parts by weight, take 70 ~ 80 parts of the sludge of plant, 10 ~ 30 parts of saccharomycete, 1 ~ 2 part of glucose, acetobacter 10
~ 15 parts, 15 ~ 20 parts of lactic acid bacteria, it is well mixed, obtains mixture；
B. count in parts by weight, take 70 ~ 80 parts of water, 20 ~ 30 parts of peptones, 10 ~ 15 parts of sodium chloride, 4 ~ 10 parts of Qiong Zhi ﹑ 17~23
Part yeast extract, is well mixed, high-temperature sterilization, obtains nutrient solution；
C. in mass ratio 3：2, mixture is mixed with nutrient solution, obtains mixture a, xylitol, addition are added into mixture a
For the 30% ~ 40% of mixture a mass, 10 ~ 15min is stood, filtering, filtrate is collected, obtains leavening.
The step（3）The input amount of leavening is 30% ~ 35% of breeding wastewater quality after precipitation in middle fermentation vat.
Compared with other method, advantageous effects are the present invention：Flase floor is installed in grid and effectively removes oil removal ratio
Larger solid matter, decolorising agent is added in grid reduces colourity in waste water, and leavening is advantageous to degrade poisonous in fermentation vat
Harmful substance, accelerate sludge deodorization, dehydration, while caused biogas effectively comprehensively utilizes after fermentation, avoids secondary pollution, manually
The plant of wetland can also be that water body conveys oxygen, increase the activity of water body, while wetland plant is in control water pollution, reduction
COD ﹑ BOD value, reach the effect of denitrogenation dephosphorizing.
Brief description of the drawings
Fig. 1 is waste water treatment system for nursery schematic diagram of the present invention.
Embodiment
The invention will be described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, waste water treatment system for nursery sterilizes including Ge Shan ﹑ coagulating sedimentation Chi ﹑ Fa Jiao Chi ﹑ Ren work Shi Di ﹑
Pond, installs flase floor in grid, 15 ~ 30mm of gap between flase floor, after animal farm wastewater flows into grid by flase floor, by
Pump is promoted in coagulative precipitation tank, the discharge of sludge after precipitation, and supernatant, which is flowed into fermentation vat, to ferment, the water after fermentation squeeze into by
The pond manually built up, bottom surface laying antiseep water barrier, fills the packing layer of 20 ~ 30cm depth, the filler of packing layer is pond
Pool sludge, reed water plant is planted, dissolved oxygen is supplied by air blower, and plant roots area fully contacts and purified, after purification
Water flow into sterilization pool in sterilize, water outlet after sterilization.
Fig. 1 schematically shows the method for sludge treatment according to one embodiment of the present invention.
Method prepared by decolorising agent：
A. in mass ratio 1：0.8 ~ 1, calcium carbonate, diatomite are put into colloid mill and ground, 200 ~ 300 mesh sieves is crossed, is mixed
Particle；
B. in mass ratio 1：1：3, xylitol, lecithin are put into 1.2mol/L glucose solutions, after standing 10~15min,
Filtering, obtains filtrate；
C. count in parts by weight, take 70~80 parts of water, 30~40 parts of peptones, 17~23 parts of yeast extracts, 15~20 agar, 4~7
Part bacillus subtilis powder, 5~8 parts of filtrates, stands 10~15min, natural air drying, obtains air dry matter；
D. 3~6 parts of mixed 8~10 parts of a grain ﹑, 70~80 parts of water of air-dried thing ﹑ that close are mixed, filtering, obtains mixture, that is, taken off
Toner.
Coagulant be San Lvization Tie ﹑ Ju close Lvization Lv ﹑ aluminum sulfate any one.
The preparation method of leavening：
A. count in parts by weight, take 70 ~ 80 parts of the sludge of plant, 10 ~ 30 parts of saccharomycete, 1 ~ 2 part of glucose, acetobacter 10
~ 15 parts, 15 ~ 20 parts of lactic acid bacteria, it is well mixed, obtains mixture；
B. count in parts by weight, take 70 ~ 80 parts of water, 20 ~ 30 parts of peptones, 10 ~ 15 parts of sodium chloride, 4 ~ 10 parts of Qiong Zhi ﹑ 17~23
Part yeast extract, is well mixed, high-temperature sterilization, obtains nutrient solution；
C. in mass ratio 3：2, mixture is mixed with nutrient solution, obtains mixture a, xylitol, addition are added into mixture a
For the 30% ~ 40% of mixture a mass, 10 ~ 15min is stood, filtering, filtrate is collected, obtains leavening.
As shown in figure 1, suitable for the animal farm wastewater processing method of above-mentioned waste water treatment system for nursery, including following step
Suddenly：
（1）Waste water is linked into grid, adds the decolorising agent of wastewater quality 20% ~ 30%, stirring；
（2）Water after decolouring is entered into coagulative precipitation tank, 25% ~ 30% coagulant of wastewater quality after addition is decolourized, standing 25 ~
30min；
（3）Supernatant after precipitation is flowed into fermentation vat, adds the leavening of wastewater quality 30% ~ 35% after precipitation, is mixed, fermentation
Caused biogas comprehensive utilization afterwards；
（4）Reed is put into artificial swamp, cultivates 5 ~ 7d, then the water after fermentation is squeezed into aerobic place is carried out in artificial swamp
Reason, the dissolved oxygen needed for plant are supplied by air blower, and the flow of air blower is 0.3~0.5m3/min；
（5）Water after processing is entered in sterilization pool and sterilized, water outlet.
Example 1
Fig. 1 schematically shows the method for sludge treatment according to one embodiment of the present invention.
Method prepared by decolorising agent：
A. in mass ratio 1：0.8, calcium carbonate, diatomite are put into colloid mill and ground, 20 mesh sieves is crossed, obtains hybrid particles；
B. in mass ratio 1：1：3, xylitol, lecithin are put into 1.2mol/L glucose solutions, after standing 10min, filtering,
Obtain filtrate；
C. count in parts by weight, take 70 parts of water, 30 parts of peptones, 17 parts of yeast extracts, 15 agar, 4 parts of bacillus subtilis powders, 5
Part filter residue, stands 10min, natural air drying, obtains air dry matter；
D. 3 parts of mixed 8 parts of a grain ﹑, 70 parts of water of air-dried thing ﹑ that close are mixed, filtering, obtains mixture, that is, obtain decolorising agent.
Coagulant is ferric trichloride.
The preparation method of leavening：
A. count in parts by weight, take 70 parts of the sludge of plant, 10 parts of saccharomycete, 1 part of glucose, 10 parts of acetobacter, lactic acid
15 parts of bacterium, it is well mixed, obtains mixture；
B. count in parts by weight, take 70 parts of water, 20 parts of peptones, 10 parts of sodium chloride, 4 parts of Qiong Zhi ﹑, 17 parts of yeast extracts, mixing is
It is even, high-temperature sterilization, obtain nutrient solution；
C. in mass ratio 3：2, mixture is mixed with nutrient solution, obtains mixture a, xylitol, addition are added into mixture a
For the 30% of mixture a mass, 10min is stood, filtering, filtrate is collected, obtains leavening.
As shown in figure 1, suitable for the animal farm wastewater processing method of above-mentioned waste water treatment system for nursery, including following step
Suddenly：
（1）Waste water is linked into grid, adds the decolorising agent of breeding wastewater quality 20%, stirring；
（2）Water after decolouring is entered into coagulative precipitation tank, adds the coagulant of wastewater quality 25% after decolourizing, stands 25min；
（3）Supernatant after precipitation is flowed into fermentation vat, 30% leavening of wastewater quality after precipitation is added, mixing, is produced after fermentation
Raw biogas comprehensive utilization；
（4）Reed is put into artificial swamp, cultivates 5d, then the water after fermentation is squeezed into Aerobic Process for Treatment is carried out in artificial swamp,
Dissolved oxygen needed for plant is supplied by air blower, and the flow of air blower is 0.3m3/min；
（5）Water after processing is entered in sterilization pool and sterilized, water outlet.
Example 2
Fig. 1 schematically shows the method for sludge treatment according to one embodiment of the present invention.
Method prepared by decolorising agent：
A. calcium carbonate, diatomite are put into colloid mill and ground respectively, crossed 250 mesh sieves, obtain hybrid particles；
B. in mass ratio 1：1：3, xylitol, lecithin are put into 1.2mol/L glucose solutions, after standing 15min, filtering,
Obtain filtrate；
C. count in parts by weight, take 75 parts of water, 35 parts of peptones, 20 parts of yeast extracts, 18 agar, 5 parts of bacillus subtilis powders, 6
Part filter residue, stands 13min, natural air drying, obtains air dry matter；
D. 5 parts of mixed 9 parts of a grain ﹑, 75 parts of water of air-dried thing ﹑ that close are mixed, filtering, obtains mixture, that is, obtain decolorising agent.
Coagulant is aluminium polychloride.
The preparation method of leavening：
A. count in parts by weight, take 75 parts of the sludge of plant, 20 parts of saccharomycete, 1.5 parts of glucose, 13 parts of acetobacter, breast
Sour 18 parts of bacterium, it is well mixed, obtains mixture；
B. count in parts by weight, take 75 parts of water, 25 parts of peptones, 13 parts of sodium chloride, 6 parts of Qiong Zhi ﹑, 20 parts of yeast extracts, mixing is
It is even, high-temperature sterilization, obtain nutrient solution；
C. in mass ratio 3：2, mixture is mixed with nutrient solution, obtains mixture a, xylitol, addition are added into mixture a
For the 35% of mixture a mass, 13min is stood, filtering, filtrate is collected, obtains leavening.
As shown in figure 1, suitable for the animal farm wastewater processing method of above-mentioned waste water treatment system for nursery, including following step
Suddenly：
（1）Waste water is linked into grid, adds the decolorising agent of wastewater quality 25%, stirring；
（2）Water after decolouring is entered into coagulative precipitation tank, adds the coagulant of wastewater quality 28% after decolourizing, stands 28min；
（3）Supernatant after precipitation is flowed into fermentation vat, 33% leavening of wastewater quality after precipitation is added, mixing, is produced after fermentation
Raw biogas comprehensive utilization；
（4）Reed is put into artificial swamp, cultivates 6d, then the water after fermentation is squeezed into Aerobic Process for Treatment is carried out in artificial swamp,
Dissolved oxygen needed for plant is supplied by air blower, and the flow of air blower is 0.4m3/min；
（5）Water after processing is entered in sterilization pool and sterilized, water outlet.
Example 3
The method for sludge treatment of one embodiment of the present invention.
Method prepared by decolorising agent：
A. calcium carbonate, diatomite are put into colloid mill and ground respectively, crossed 300 mesh sieves, obtain hybrid particles；
B. in mass ratio 1：1：3, xylitol, lecithin are put into 1.2mol/L glucose solutions, after standing 13min, filtering,
Obtain filtrate；
C. count in parts by weight, take 80 parts of water, 40 parts of peptones, 23 parts of yeast extracts, 20 agar, 7 parts of bacillus subtilis powders, 8
Part filter residue, stands 15min, natural air drying, obtains air dry matter；
D. 6 parts of mixed 10 parts of a grain ﹑, 80 parts of water of air-dried thing ﹑ that close are mixed, filtering, obtains mixture, that is, obtain decolorising agent.
Coagulant is aluminum sulfate.
The preparation method of leavening：
A. count in parts by weight, take 80 parts of the sludge of plant, 30 parts of saccharomycete, 2 parts of glucose, 15 parts of acetobacter, lactic acid
20 parts of bacterium, it is well mixed, obtains mixture；
B. count in parts by weight, take 80 parts of water, 30 parts of peptones, 15 parts of sodium chloride, 10 parts of Qiong Zhi ﹑, 23 parts of yeast extracts, mixing is
It is even, high-temperature sterilization, obtain nutrient solution；
C. in mass ratio 3：2, mixture is mixed with nutrient solution, obtains mixture a, xylitol, addition are added into mixture a
For the 40% of mixture a mass, 15min is stood, filtering, filtrate is collected, obtains leavening.
As shown in figure 1, suitable for the animal farm wastewater processing method of above-mentioned waste water treatment system for nursery, including following step
Suddenly：
（1）Waste water is linked into grid, adds 30% decolorising agent of wastewater quality, is stirred；
（2）Water after decolouring is entered into coagulative precipitation tank, adds the coagulant of wastewater quality 30% after decolourizing, stands 30min；
（3）Supernatant after precipitation is flowed into fermentation vat, the leavening of wastewater quality 35% after precipitation is added, mixing, is produced after fermentation
Raw biogas comprehensive utilization；
（4）Reed is put into artificial swamp, cultivates 7d, then the water after fermentation is squeezed into Aerobic Process for Treatment is carried out in artificial swamp,
Dissolved oxygen needed for plant is supplied by air blower, and the flow of air blower is 0.5m3/min；
（5）Water after processing is entered in sterilization pool and sterilized, water outlet.
Reference examples：Traditional animal farm wastewater processing mode is the processing mode of anaerobism+aerobic.
Detection method：Above-described embodiment and the composition in animal farm wastewater after reference examples processing are detected.
Organic concentration (COD8000 ~ 20000mg/L) in before processing animal farm wastewater, BOD concentration（2~6000mg/
L）, ammonia nitrogen concentration (500 ~ 1400mg/L), content of beary metal (32.3 ~ 730.1mg/L).
As a result as indicated with 1.
As seen from the above table, a kind of waste water treatment system for nursery of the present invention has that percent of decolourization is high, harmful substance contents are low, without secondary
Pollute, COD, BOD clearance are high in sewage, meet requirement, are worth of widely use.
Claims (9)
1. a kind of processing system of animal farm wastewater, including Ge Shan ﹑ coagulating sedimentation Chi ﹑ Fa Jiao Chi ﹑ sterilization pools, it is special
Sign is, artificial swamp is established between fermentation vat and sterilization pool, the waste water stream enters grid, then flows into coagulative precipitation tank
In, the supernatant after precipitation enters in fermentation vat, and the water after fermentation flows into artificial swamp, and the supernatant of artificial swamp enters sterilization
Pond, water outlet.
2. the processing system system of animal farm wastewater according to claim 1, it is characterised in that the flase floor in the grid
Between gap be 15 ~ 30mm.
3. the processing system of animal farm wastewater according to claim 1, it is characterised in that the artificial swamp is from bottom surface
Antiseep water barrier is laid, fills the packing layer of 20 ~ 30cm depth, the filler of packing layer is pond sludge, surface grafting reed
Plant.
A kind of 4. method for sludge treatment of the processing system of animal farm wastewater as claimed in claim 1, it is characterised in that this method
Comprise the following steps：
（1）Waste water is linked into grid, adds decolorising agent, stirring；
（2）Water after decolouring is entered into coagulative precipitation tank, adds coagulant, is stood；
（3）Supernatant after precipitation is flowed into fermentation vat, adds leavening, mixing, caused biogas is comprehensive after fermentation
Close and utilize；
（4）Reed is put into artificial swamp and cultivated, then the water after fermentation is squeezed into artificial swamp and handled；
（5）Water after processing is entered in sterilization pool and sterilized, water outlet.
5. the method for animal farm wastewater processing according to claim 4, it is characterised in that the step（1）Taken off in middle grid
Method prepared by toner：
A. in mass ratio 1：0.8 ~ 1, calcium carbonate, diatomite are put into colloid mill and ground, 200 ~ 300 mesh sieves is crossed, is mixed
Particle；
B. xylitol, lecithin are put into glucose solution, after standing 10~15min, filtering, obtain filtrate；
C. count in parts by weight, take 70~80 parts of water, 30~40 parts of peptones, 17~23 parts of yeast extracts, 15~20 agar, 4~7
Part bacillus subtilis powder, 5~8 parts of filtrates, stands 10~15min, natural air drying, obtains air dry matter；
D. 3~6 parts of mixed 8~10 parts of a grain ﹑, 70~80 parts of water of air-dried thing ﹑ that close are mixed, filtering, obtains mixture, that is, taken off
Toner.
6. the method for animal farm wastewater processing according to claim 4, it is characterised in that the step（1）Taken off in middle grid
The input amount of toner is the 20% ~ 30% of breeding wastewater quality.
7. the method for animal farm wastewater processing according to claim 4, it is characterised in that the step（2）Middle coagulating sedimentation
Coagulant in pond be San Lvization Tie ﹑ Ju close Lvization Lv ﹑ aluminum sulfate any one, input amount is breeding wastewater quality after decolourizing
25%~30%。
8. method for sludge treatment according to claim 4, it is characterised in that the step（3）Leavening in middle fermentation vat
Preparation method：
A. count in parts by weight, take 70 ~ 80 parts of the sludge of plant, 10 ~ 30 parts of saccharomycete, 1 ~ 2 part of glucose, acetobacter 10
~ 15 parts, 15 ~ 20 parts of lactic acid bacteria, it is well mixed, obtains mixture；
B. count in parts by weight, take 70 ~ 80 parts of water, 20 ~ 30 parts of peptones, 10 ~ 15 parts of sodium chloride, 4 ~ 10 parts of Qiong Zhi ﹑ 17~23
Part yeast extract, is well mixed, high-temperature sterilization, obtains nutrient solution；
C. in mass ratio 3：2, mixture is mixed with nutrient solution, obtains mixture a, xylitol, addition are added into mixture a
For the 30% ~ 40% of mixture a mass, 2 ~ 3d is stood, filtering, filtrate is collected, obtains leavening.
9. method for sludge treatment according to claim 4, it is characterised in that the step（3）Leavening in middle fermentation vat
Input amount is 30% ~ 35% of breeding wastewater quality after precipitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710803934.2A CN107445407A (en) | 2017-09-08 | 2017-09-08 | A kind of waste water treatment system for nursery and its processing method |
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| CN108623098A (en) * | 2018-05-30 | 2018-10-09 | 蒋春霞 | A kind of method of breeding wastewater decoloration |
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