CN108793584B - Macrobrachium rosenbergii seedling culture wastewater harmless treatment process - Google Patents
Macrobrachium rosenbergii seedling culture wastewater harmless treatment process Download PDFInfo
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- CN108793584B CN108793584B CN201810447980.8A CN201810447980A CN108793584B CN 108793584 B CN108793584 B CN 108793584B CN 201810447980 A CN201810447980 A CN 201810447980A CN 108793584 B CN108793584 B CN 108793584B
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- 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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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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
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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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Abstract
The invention belongs to the field of water ecological restoration, and particularly relates to a macrobrachium rosenbergii seedling culture wastewater harmless treatment process, which comprises the following steps: pretreatment and biochemical treatment. A pretreatment stage: removing solid bait residue and reverse osmosis salt in the seedling wastewater; and (3) biochemical treatment stage: comprises softening and flocculating treatment of high-salinity wastewater, separation of salt water and biological absorption of fresh water. The method can effectively remove the solid bait residual shells, simultaneously can keep the filter channel smooth for a long time, effectively prevent the solid residual shells from blocking a reverse osmosis system, simultaneously can effectively remove the pollutants such as salt, nitrogen and phosphorus in the seedling wastewater, reduce the salinization problem and the water eutrophication problem caused by the seedling wastewater, has ecological and environment-friendly treatment process, is energy-saving and efficient, does not cause secondary pollution, and accords with the concept of sustainable development.
Description
Technical Field
The invention belongs to the field of water ecological restoration, and particularly relates to a harmless treatment process for macrobrachium rosenbergii seedling culture wastewater.
Background
Aquaculture is an important industry for rural development in China. In recent years, the culture scale of macrobrachium rosenbergii is continuously enlarged, the breeding quantity is increased sharply, and water pollution in all aspects is accompanied. The conventional aquaculture wastewater treatment process is difficult to achieve an ideal treatment effect due to the fact that the macrobrachium rosenbergii seedling culture wastewater is rich in solid bait residual shells (residues), salt, nitrogen, phosphorus and other substances, and an efficient and economic treatment process is urgently needed to be explored so as to prevent peripheral soil salinization and water area eutrophication caused by direct discharge of the seedling culture wastewater, and ensure green, healthy and sustainable development of the industry.
Disclosure of Invention
In order to overcome the defects of the existing disposal mode, the invention provides a harmless treatment process of the macrobrachium rosenbergii seedling culture wastewater from the viewpoints of optimizing process combination, reducing comprehensive energy consumption and maintaining sustainable development, on one hand, solving the problem of how to effectively remove solid bait residual shells in the seedling culture wastewater and on the other hand, how to effectively remove salt, nitrogen, phosphorus and other nutrient substances in a water body.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a harmless treatment process for macrobrachium rosenbergii seedling culture wastewater comprises the following steps: two stages of pretreatment and biochemical treatment;
a pretreatment stage: removing solid bait residue and reverse osmosis salt in the seedling wastewater;
and (3) biochemical treatment stage: comprises softening and flocculating treatment of high-salinity wastewater, separation of salt water and biological absorption of fresh water.
As preferred, the useless shell of waste water solid bait that grows seedlings is got rid of and is adopted the incomplete shell separating centrifuge of solid, the separating centrifuge includes the rose box and is located the bag is collected to the incomplete shell of solid of rose box one side, the rose box includes the filter chamber and is located the collection chamber of filter chamber one side, the upper portion of filter chamber is provided with the filter screen, it is right to be provided with on the chamber wall of filter chamber the filter screen carries out driven vibrating structure, the filter screen top is provided with washes the structure, wash the structure with it is in relative setting to collect the chamber, be provided with in the filter chamber and be located the filter medium of filter screen below. The bait residual shells in the seedling raising wastewater can be effectively removed by adopting the separator, the removal rate reaches over 90 percent, the solid residual shells are effectively prevented from blocking a subsequent reverse osmosis system, and the reverse osmosis membrane is protected.
Preferably, the reverse osmosis salt removal process comprises: and the wastewater treated by the separator enters a reverse osmosis membrane, and is concentrated into high-salinity wastewater with a certain concentration and pure-fresh wastewater, wherein the concentration of the high-salinity wastewater is 40-60 per mill.
Preferably, the softening and flocculating treatment process of the high-salinity wastewater comprises the following steps: adding lime and soda ash into high-salinity wastewater obtained by reverse osmosis salinity removal, adding 8g of lime and 6g of soda ash into 1L of high-salinity wastewater, keeping the pH value at 10-11, reducing the hardness of water, and then adding aluminum sulfate serving as a flocculating agent according to the proportion of 1g/L to promote flocculation and precipitate suspended matters in water.
Preferably, the brine separation step comprises: and transferring the supernatant of the wastewater obtained by flocculation to an evaporation tank, heating, collecting salt crystals after evaporation, and effectively removing salt pollutants in the wastewater, wherein the evaporation tank adopts an outdoor cement tank which is heated with a ground.
Preferably, the fresh water bioabsorption step comprises: and carrying out microbial treatment on the pure and fresh wastewater obtained after the reverse osmosis salinity removing procedure, then carrying out aeration treatment on the pure and fresh wastewater in the artificial wetland, effectively removing nitrogen and phosphorus pollutants, and discharging or recycling the pure and fresh wastewater after reaching the discharge standard, so that the concept of sustainable development is met.
Preferably, the vibration structure includes a vibration shaft associated with the filter screen and a driving motor for driving the vibration shaft to vibrate.
Preferably, the driving motor is a variable frequency motor, so that the frequency is controlled, and the energy is saved and the efficiency is high.
Preferably, the flushing structure comprises a flushing pipe and a booster water pump connected with the flushing pipe, and the flushing pipe is provided with a plurality of flushing holes, so that the flushing effect is more uniform.
Preferably, the upper part of the filter box is positioned above the filter screen, baffles are formed on the periphery of the filter box, and the height of each baffle is 15-25 cm.
Further preferably, the height of the baffle is 20cm, so that residual shells or waste water is effectively prevented from being flushed out of the box body.
Preferably, the width of the collection cavity is 10-20 cm.
Further preferably, the width of the collecting cavity is 15cm, so that residual shells can be effectively collected, and no space is wasted.
Preferably, the filter screen is a 150-400-mesh polyethylene mesh sheet.
Further preferably, the filter screen is a 200-mesh polyethylene mesh sheet, so that a better filtering effect can be achieved, and the filter screen cannot be blocked quickly.
Preferably, the filter medium is quartz sand with different particle sizes.
Preferably, the evaporation tank heating means of the brine separation step is sunlight or a heating pipe to promote evaporation of water.
Preferably, the aeration treatment adopts oxygen-enriched aeration, so that the energy consumption is reduced, and the efficiency is improved.
In summary, the invention has the following beneficial effects:
1. this novel waste water treatment process of growing seedlings can keep the long-term unobstructed of filtration passageway when effectively getting rid of solid bait residual shell, prevents effectively that solid residual shell from blockking up reverse osmosis system, can effectively get rid of the pollutant such as salinity and nitrogen phosphorus in the waste water of growing seedlings simultaneously, reduces the salinization problem and the water eutrophication problem that the waste water of growing seedlings causes.
2. The novel seedling wastewater treatment process utilizes the frequency converter to control the filter screen and the flushing structure, utilizes sunlight to evaporate water, and meets the requirements of energy conservation and high efficiency through procedures such as oxygen-enriched aeration.
3. The novel seedling raising wastewater treatment process is ecological and environment-friendly, can cause secondary pollution, and accords with sustainable development.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a sectional view of a solid residue separator;
FIG. 3 is a flow chart of the present invention;
wherein, the device comprises 1-a filter screen, 2-a solid residue collecting bag, 3-a flushing hole, 4-a filter medium, 5-a vibration shaft, 6-a booster pump, 7-a collecting cavity, 8-a filter cavity, 9-a driving motor and 10-a baffle.
Detailed Description
The present embodiments are to be considered in all respects as illustrative and not restrictive. Any changes that may be made by one of ordinary skill in the art after reading the specification herein are, within the purview of the appended claims, to fall within the scope of the patent laws.
Example 1:
as shown in figure 3, the invention relates to a harmless treatment process of macrobrachium rosenbergii seedling raising wastewater, the seedling raising wastewater firstly enters a solid bait shell separating machine and a reverse osmosis membrane for pretreatment, and the obtained high-salinity wastewater and pure-fresh wastewater are subjected to biochemical treatment.
As shown in fig. 1 and 2, a solid residual shell separator comprises a 2m filter box and a solid residual shell collecting bag 2 arranged on one side of the filter box, the filter box comprises a filter chamber 8 and a collecting chamber 7 arranged on one side of the filter chamber 8, the width of the collecting chamber 7 is 15cm, the solid residual shell collecting bag 2 is arranged below the collecting chamber 7, the upper part of the filter chamber 8 is a filter screen 1, the aperture of the filter screen 1 is 200 meshes, seedling raising wastewater is discharged from the upper part of the filter box, a baffle 10 with the height of 20cm is arranged on the periphery of the upper part of the filter box above the filter screen 1, a flushing structure is arranged above the filter screen 1, the flushing structure comprises a flushing pipe arranged on the baffle and a booster pump 6 connected with the flushing pipe, the flushing pipe is arranged opposite to the collecting chamber 7, the flushing pipe is provided with a plurality of flushing holes 3, the flushing holes 3 are arranged at intervals of 10 cm, the initial flushing direction of the flushing holes 3 is parallel to the filter screen 1, the flushing pipe is connected with a pressurizing water pump 6, the filter screen 1 is connected with a vibrating shaft 5, the vibrating shaft 5 and the pressurizing water pump are connected with a driving motor 9 simultaneously, raw water enters a filter cavity 8 filled with quartz sand with different particle sizes through the filter screen 1 and is discharged after secondary filtration, the driving motor 9 is a frequency conversion motor preferably, the vibrating shaft 5 and the pressurizing water pump 6 can be periodically driven, energy is saved, efficiency is high, the filter screen 1 is driven by the vibrating shaft 5 to take up solid residual shells on the surface, water flow jetted out from the flushing hole 3 simultaneously flushes the solid residual shells to a collecting cavity 7, and finally the solid residual shells enter a solid residual shell collecting bag 2. After the separator is used, more than 90% of solid bait residual shells can be removed, meanwhile, a filter screen of the separator is stable and free of blockage due to a vibration cleaning structure, long-term filtering effect can be kept by matching with secondary filtering of quartz sand, and the effect of protecting a subsequent reverse osmosis membrane can be well achieved.
The wastewater passing through the separator enters a reverse osmosis membrane to respectively obtain 50 per mill of concentrated high-salinity wastewater and pure-fresh wastewater.
The hardness of the high-salt wastewater in a water body is effectively reduced by softening the high-salt wastewater by lime soda (8 g of quicklime and 6g of sodium carbonate are added into every 1L of the high-salt wastewater, the pH value is kept between 10 and 11), then 1g of aluminum sulfate is added into every 1L of the wastewater to promote flocculation, the supernatant is transferred into a terrestrial cement pond with a ground heater, the water is evaporated by sunlight, salt crystals are collected, and the method is environment-friendly and energy-saving.
And the pure and light wastewater is subjected to microbial treatment and then flows into the artificial wetland for oxygen-enriched aeration treatment, and is discharged or recycled after reaching the standard.
Example 2:
different from the embodiment 1, some parameters of the separator are changed, and others are not changed.
As shown in fig. 1 and 2, a solid residual shell separator comprises a 2m filter box and a solid residual shell collecting bag 2 arranged on one side of the filter box, the filter box comprises a filter chamber 8 and a collecting chamber 7 arranged on one side of the filter chamber 8, the width of the collecting chamber 7 is 20cm, the solid residual shell collecting bag 2 is arranged below the collecting chamber 7, the upper part of the filter chamber 8 is a filter screen 1, the aperture of the filter screen 1 is 150 meshes, seedling raising wastewater is discharged from the upper part of the filter box, a baffle 10 with the height of 20cm is arranged on the periphery of the upper part of the filter box above the filter screen 1, a flushing structure is arranged above the filter screen 1, the flushing structure comprises a flushing pipe arranged on the baffle and a booster pump 6 connected with the flushing pipe, the flushing pipe is arranged opposite to the collecting chamber 7, the flushing pipe is provided with a plurality of flushing holes 3, the flushing holes 3 are arranged at intervals of 8 cm, the initial flushing direction of the flushing holes 3 is parallel to the filter screen 1, the flushing pipe is connected with a pressurizing water pump 6, the filter screen 1 is connected with a vibrating shaft 5, the vibrating shaft 5 and the pressurizing water pump are connected with a driving motor 9 simultaneously, raw water enters a filter cavity 8 filled with quartz sand with different particle sizes through the filter screen 1 and is discharged after secondary filtration, the driving motor 9 is a frequency conversion motor preferably, the vibrating shaft 5 and the pressurizing water pump 6 can be periodically driven, energy is saved, efficiency is high, the filter screen 1 is driven by the vibrating shaft 5 to take up solid residual shells on the surface, water flow jetted out from the flushing hole 3 simultaneously flushes the solid residual shells to a collecting cavity 7, and finally the solid residual shells enter a solid residual shell collecting bag 2. After the separator is used, more than 90% of solid bait residual shells can be removed, meanwhile, a filter screen of the separator is stable and free of blockage due to a vibration cleaning structure, long-term filtering effect can be kept by matching with secondary filtering of quartz sand, and the effect of protecting a subsequent reverse osmosis membrane can be well achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A harmless treatment process for macrobrachium rosenbergii seedling culture wastewater is characterized by comprising the following steps: two stages of pretreatment and biochemical treatment;
a pretreatment stage: removing solid bait residue and reverse osmosis salt in the seedling wastewater;
and (3) biochemical treatment stage: comprises softening and flocculating treatment of high-salinity wastewater, separation of salt water and biological absorption of fresh water;
the solid residue shell separating machine is used for removing solid bait residue shells in the seedling raising wastewater, the separating machine comprises a filter box and a solid residue shell collecting bag positioned on one side of the filter box, the filter box comprises a filter cavity and a collecting cavity positioned on one side of the filter cavity, a filter screen is arranged on the upper portion of the filter cavity, a vibrating structure for driving the filter screen is arranged on the cavity wall of the filter cavity, a flushing structure is arranged above the filter screen, the flushing structure and the collecting cavity are oppositely arranged, and a filtering medium positioned below the filter screen is arranged in the filter cavity;
the softening and flocculating treatment process of the high-salinity wastewater comprises the following steps: adding lime and soda into the high-salinity wastewater obtained by reverse osmosis salinity removal, keeping the pH value at 10-11, continuously adding flocculating agent aluminum sulfate according to the proportion of 1g/L, and precipitating suspended matters in water to obtain flocculated wastewater;
the fresh water biological absorption process comprises the following steps: and carrying out microbial treatment on the pure and light wastewater obtained after the reverse osmosis salinity removing procedure, then introducing the pure and light wastewater into an artificial wetland for aeration treatment, and discharging or recycling the pure and light wastewater after the pure and light wastewater reaches the discharge standard.
2. The harmless treatment process of the macrobrachium rosenbergii seedling raising wastewater as claimed in claim 1, wherein the reverse osmosis salinity removing process comprises the following steps: and the wastewater treated by the separator enters a reverse osmosis membrane, and is concentrated into high-salinity wastewater with a certain concentration and pure-fresh wastewater, wherein the concentration of the high-salinity wastewater is 40-60 per mill.
3. The harmless treatment process of the macrobrachium rosenbergii seedling raising wastewater as claimed in claim 1, wherein the brine separation process comprises: and transferring the supernatant of the flocculated wastewater into an evaporation tank, and collecting salt crystals after evaporation by heating, wherein the evaporation tank adopts an open cement tank which is heated with a ground.
4. The harmless treatment process of the macrobrachium rosenbergii seedling raising wastewater as claimed in claim 1, wherein the filter screen adopts a polyethylene mesh sheet with 150-400 meshes.
5. The harmless treatment process of the macrobrachium rosenbergii seedling raising wastewater as claimed in claim 1, wherein the filter medium is quartz sand with different grain sizes.
6. The harmless treatment process of the macrobrachium rosenbergii seedling raising wastewater as claimed in claim 3, wherein the heating means adopts a heating pipe.
7. The harmless treatment process of the macrobrachium rosenbergii seedling raising wastewater as claimed in claim 1, wherein the aeration treatment adopts oxygen-enriched aeration.
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| CN111066704A (en) * | 2019-12-10 | 2020-04-28 | 浙江省淡水水产研究所 | Method for thickening macrobrachium rosenbergii seedlings by using double-layer greenhouse |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203634920U (en) * | 2013-12-24 | 2014-06-11 | 连云港锐华化工有限公司 | Filter device used for 5-dichloronitrobenzene production |
| CN106007201A (en) * | 2016-07-05 | 2016-10-12 | 嘉兴悟净环保科技有限公司 | Livestock and poultry breeding wastewater treating technology |
| WO2017007830A1 (en) * | 2015-07-06 | 2017-01-12 | Parabel Ltd. | Methods and systems for extracting a polysaccharide product from a microcrop and compositions thereof |
| CN107759041A (en) * | 2017-11-30 | 2018-03-06 | 福建帝凯农业综合开发有限公司 | A kind of sewage microbe treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203634920U (en) * | 2013-12-24 | 2014-06-11 | 连云港锐华化工有限公司 | Filter device used for 5-dichloronitrobenzene production |
| WO2017007830A1 (en) * | 2015-07-06 | 2017-01-12 | Parabel Ltd. | Methods and systems for extracting a polysaccharide product from a microcrop and compositions thereof |
| CN106007201A (en) * | 2016-07-05 | 2016-10-12 | 嘉兴悟净环保科技有限公司 | Livestock and poultry breeding wastewater treating technology |
| CN107759041A (en) * | 2017-11-30 | 2018-03-06 | 福建帝凯农业综合开发有限公司 | A kind of sewage microbe treatment system |
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