CN212222570U - Mariculture wastewater treatment and cyclic utilization system - Google Patents
Mariculture wastewater treatment and cyclic utilization system Download PDFInfo
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Abstract
The utility model discloses a mariculture waste water treatment and cyclic utilization system utilizes ecological theory, through combining together plant, microorganism, living beings matrix and traditional physics (oxygenation) chemistry (filtration and adsorption) method, carries out multistage circulation to enclosing pond marine product aquaculture waste water and handles, makes aquaculture waste water reach deep purification and handles, has reduced the eutrophication pollution risk in coastal waters sea area. The utility model provides a traditional marine product farming waste water treatment's technological problem, the ecological treatment method and the hydrologic cycle theory of proposing to cooperation wisdom control system, the cost is reduced has especially improved efficiency.
Description
Technical Field
The utility model relates to a waste water treatment technical field, concretely relates to mariculture waste water treatment and cyclic utilization system.
Background
Although the mariculture can bring considerable income to farmers, the tail water of the mariculture also has great influence on the water environment. In recent years, with the continuous development of social economy, the demand of people on marine products is increasing day by day, and in order to meet the rapidly increasing supply demand, the marine culture along the coast of China increases the culture density to improve the yield, so that a large amount of residual baits and excrement are discharged into a water body, the content of nitrogen and phosphorus in the water of a culture pond is rapidly increased, and the eutrophication of seawater is caused. Therefore, the culture environment is deteriorated, the produced culture tail water can cause bad influence on the water quality of offshore areas and the marine ecological environment, and the red tide can be caused frequently.
For fresh water aquaculture, seawater aquaculture mostly takes offshore area pond-enclosing aquaculture or aquaculture net cages as the main thing, and the unified collection of its aquaculture waste water is comparatively difficult, and surplus nitrogen phosphorus pollutant deposits in the bottom layer of offshore area, and along with the continuous accumulation of time, the endogenous phosphorus pollution of deposit in the sediment progressively increases, and the nitrogen pollution of overlying water also constantly increases. The long-term high-density culture water circulation can cause the seawater pollution load of the pond culture area adjacent to the coastal sea area to be too heavy, further destroy the ecological system of the coastal zone, cause the self-cleaning capacity of the ocean to be reduced for a long time, cause the frequent red tide even by the serious seawater eutrophication, and cause more social harm.
The mariculture wastewater is used as high salinity wastewater, and the traditional treatment methods comprise a physical method, a chemical method and a biological method. In practical engineering applications, people usually combine a physical method and a chemical method to treat seawater wastewater, and mainly add a medicament into the seawater wastewater to remove pollutants in the seawater wastewater through the adsorption, flocculation, precipitation and other actions of the medicament.
The patent specification with the publication number of CN 106186548A discloses a mariculture wastewater treatment system and a treatment method, which combines an A/O biological contact oxidation process and an adsorption phosphorus removal technology to be applied to the field of seawater treatment. The patent specification with publication number CN 204281505U discloses a treatment system for mariculture wastewater, which adopts a process of 'air flotation + SBR'. The above patent technologies are all based on the biological method for treating the mariculture wastewater, and the biological method has more prominent limitation in the field of seawater wastewater treatment, namely, a specific salt-tolerant microbial inoculum needs to be cultured to purify organic matters and nitrogen and phosphorus pollutants in the seawater wastewater.
The traditional treatment method has relatively low treatment efficiency and relatively large treatment cost investment, and most importantly, the diffusion area of mariculture is too large, which also causes certain difficulty in the treatment of mariculture wastewater.
Therefore, it is very important and urgent to develop a new treatment method and water circulation system for marine culture wastewater in the offshore area pond.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists in the field, the utility model provides a mariculture waste water treatment and cyclic utilization system utilizes ecological theory, through combining together plant, microorganism, living beings matrix and traditional physics (oxygenation) chemistry (filtration and adsorption) method, carries out multistage circulation to enclosing pond marine aquaculture waste water and handles, makes aquaculture waste water reach deep purification and handles, has reduced the eutrophication pollution risk in coastal waters sea area.
A mariculture wastewater treatment and recycling system comprises:
a aquaculture wastewater treatment area for receiving the mariculture wastewater through a water inlet pump; the interior of the aquaculture wastewater treatment area is divided into a plurality of aquaculture wastewater treatment units which are mutually communicated through a structure retaining wall, and a plurality of biomass filler filter dams and salt-tolerant aquatic plant ecosystems are arranged in each aquaculture wastewater treatment unit;
the aeration pipe network system connected with the aeration equipment comprises a main pipe network system and branch pipe network systems which are arranged in the culture wastewater treatment area and correspond to the culture wastewater treatment units one by one, wherein the branch pipe network systems are connected in parallel into the main pipe network system and are provided with air flow adjusting devices;
the tail water deep purification area is used for receiving tail water of the aquaculture wastewater treatment area, and effluent is recycled for mariculture; the interior of the tail water deep purification area is divided into a plurality of ecological ditch intercepting areas which are communicated with each other through a structure retaining wall, and ecological ditch plant communities are planted in each ecological ditch intercepting area.
Preferably, the adjacent aquaculture wastewater treatment units are communicated through water passing holes, and the water passing hole for water inlet and the water passing hole for water outlet of each aquaculture wastewater treatment unit are respectively positioned at two opposite sides and are respectively close to the two opposite ends;
and each water through hole leads the water outlet end to be close to the bottom of the next cultivation wastewater treatment unit through a pipeline.
The water through holes with the preferred design can ensure sufficient hydraulic retention time.
Preferably, the biomass filler filtering dam and the salt-tolerant aquatic plant ecosystem are arranged at intervals.
Preferably, the biomass filler filter dam is formed by modifying and processing a biomass material matrix, wherein the biomass material matrix is Ca2+The group modified material comprises at least one of crushing, calcining and acid-base treatment; the Ca2+Group-based modified materialThe material has good permeability and high adsorbability, such as oyster shell; the biomass material matrix treated by modification has good permeability and considerable specific surface area, and Ca2+The activity of the group can be obviously enhanced so as to improve the removal rate of the total phosphorus in the wastewater.
Preferably, the water surface area of the salt-tolerant aquatic plant ecosystem accounts for 8-15% so as to ensure that the synergistic effect of the filler matrix, the aquatic plants and the microorganisms is fully exerted in the wastewater treatment process.
Preferably, the salt-tolerant aquatic plant ecosystem comprises a salt-tolerant aquatic plant planting area and a solidified microbial preparation slow-release area, wherein the salt-tolerant aquatic plant planting area is filled with planting matrixes and planted with salt-tolerant aquatic plants, and the solidified microbial preparation slow-release area is arranged at the root system position of the salt-tolerant aquatic plants and filled with solidified slow-release microbial preparations. The salt-tolerant aquatic plant is emergent aquatic plant, and can be Salicornia bigelovii et al.
After the biomass filler filtering dam is modified, the specific surface area of the biomass filler filtering dam is increased, the microbial biofilm formation is facilitated, the modified multi-micro-hollow structure enables the biomass filler filtering dam to have good permeability, a microenvironment in each micro-porous finite element of the biomass filler filtering dam has certain dissolved oxygen, the growth of salt-tolerant aquatic plants in a salt-tolerant aquatic plant ecosystem can continuously remove nitrogen and phosphorus in water as nutrient substances, meanwhile, a solidified slow-release microbial preparation arranged on root systems of the salt-tolerant aquatic plants can continuously adjust the microbial flora structure in the water for a long time, and the water treatment conditions are continuously optimized through intelligent control aeration oxygenation.
Preferably, each aeration branch pipe of the branch pipe network system is arranged at a certain distance, and an anti-clogging aeration head is arranged on a single aeration branch pipe at a certain distance.
Preferably, the water channels between the intercepting areas of the ecological ditches are transformed into baffling channels through a structure retaining wall in the tail water deep purification area so as to prolong the hydraulic retention time.
The baffling channel is designed in an arc shape to reduce dead water areas and reduce water flow resistance to keep water flow smooth.
Preferably, the ecological ditch plant community comprises a plant planting and cultivating substrate and salt-tolerant submerged plants planted on the plant planting and cultivating substrate, and is favorable for further deep purification treatment of tail water.
Preferably, a plurality of reflux pumps are arranged in the tail water deep purification area, and an outlet of each reflux pump is connected with a plurality of reflux ports respectively communicated with the different aquaculture wastewater treatment units;
the tail water deep purification area is characterized in that a regulating pump is arranged at the water outlet end of the tail water deep purification area, the outlet of the regulating pump is connected with two pipelines, one pipeline is communicated with the water inlet end of the aquaculture wastewater treatment area through a communication port, and the other pipeline is used for seawater aquaculture.
Mainly embody the principle that is ecological irrigation canals and ditches in the tail water degree of depth purification region, not only purify the nitrogen phosphorus that coats the aquatic through every grade of plant community, can also further strengthen getting rid of the nitrogen phosphorus in the substrate through the submerged plant, prevent that surplus nitrogen phosphorus from depositing in the substrate to avoid rivers disturbance to cause nitrogen phosphorus in the substrate to release to coat aquatic formation quality of water to worsen. The tail water deep purification area can enhance the stability of the system and the process and keep stable and excellent purification treatment effect.
In addition, phosphorus can not form nitrogen gas through various reactions like nitrogen to overflow, so that a complete ecological system is formed by the biomass filler filter dam, the salt-tolerant aquatic plant ecological system and the ecological ditch plant community, and the comprehensive action effect is realized through the organic combination of physics, chemistry and biology.
The utility model discloses a multistage setting of backward flow further promotes the effect of getting rid of nitrogen phosphorus.
Preferably, the mariculture wastewater treatment and recycling system further comprises a plurality of flowmeters and water quality monitoring sensor probes, wherein the flowmeters are respectively arranged at the water inlet end of the aquaculture wastewater treatment area, the water outlet end of the tail water deep purification area, the communication ports and the backflow ports, the water quality monitoring sensor probes are respectively arranged at the water inlet end of the aquaculture wastewater treatment area and the water outlet end of the tail water deep purification area.
Preferably, the mariculture wastewater treatment and recycling system further comprises a control system, and the control system is used for controlling the oxygenation aeration equipment, the air flow adjusting device, the water inlet pump, the reflux pump and the adjusting pump according to monitoring data of the flow meters and the water quality monitoring sensor probes.
The utility model discloses introduce wisdom control system, it is right the utility model discloses in the electrical equipment that relates carry out from feedback control to reach the continuous optimization promotion of technology. The control system can be a modularized device which is embedded into intelligent control system software and is based on a PRC electric control principle, and self-feedback real-time control can be carried out on the whole process flow and the operation can be optimized through the intelligent control system and according to water quality and water quantity monitoring data.
The mariculture wastewater treatment and recycling process of the mariculture wastewater treatment and recycling system comprises the following steps: after the mariculture wastewater sequentially passes through the aquaculture wastewater treatment area and the tail water deep purification area, the mariculture wastewater is controlled to flow back to enter the aquaculture wastewater treatment area again or be reused for mariculture according to the actual condition of the effluent.
Preferably, the corresponding aquaculture wastewater treatment units are alternately in anaerobic, aerobic and facultative environments by controlling the reflux amount of each reflux port and each air flow adjusting device.
Compared with the prior art, the utility model, main advantage includes:
the utility model provides a set of brand-new pond marine aquaculture wastewater treatment and cyclic utilization system and technology of enclosing suitable for coastal waters region, the high-efficient deep purification who breeds waste water of marine products has been realized, the difficult processing problem of marine product aquaculture waste water has been solved through the circulation framework of whole system, introduce wisdom control system simultaneously, obtain each electrical equipment of water yield quality of water data signal through the feedback in different functional areas, at first through controlling the intake pump, the intake gate, oxygenation aeration equipment, electrical equipment such as quality of water yield monitoring facilities, adjust the microenvironment condition among each treatment area, make marine product aquaculture waste water effectively purify, and the introduction of circulation structure system more makes stable up to standard of sewage treatment obtain the guarantee powerfully. Feeding back the measurement data of the dissolved oxygen in water through a water quality monitoring sensor (dissolved oxygen sensor) in a culture wastewater treatment area, controlling an oxygen aeration device and an air flow regulating valve of which a branch pipe network system is connected with a main pipe network system, and simultaneously controlling a reflux pump and a gate of a multi-stage reflux port to ensure reasonable reflux quantity and reflux level so as to ensure that a plurality of units in the culture wastewater treatment area alternately generate anaerobic, aerobic and facultative environments according to requirements, and alternately performing nitrification and denitrification to remove total nitrogen in sewage, and simultaneously fully playing the roles of a salt-tolerant aquatic plant ecosystem and underwater solidification slow-release microorganisms thereof, improving the activity of biofilm microorganisms of a biomass packing filter dam, improving the absorption and removal of phosphorus in the sewage, and preventing the phosphorus from depositing in bottom sludge to form continuous endogenous pollution due to long-term pond culture; and in the tail water deep purification area, a water outlet gate of a water outlet, an adjusting pump and a water passing gate of a communication port are controlled through water quantity and water quality data signals fed back by a liquid level meter and a water quality monitoring sensor, and whether the discharged water is discharged into the sea or is continuously reprocessed by circulating reflux is judged according to the water quality condition.
The utility model provides a traditional marine product farming waste water treatment's technological problem, the ecological treatment method and the hydrologic cycle theory of proposing to cooperation wisdom control system, the cost is reduced has especially improved efficiency.
Drawings
FIG. 1 is a schematic top view of a mariculture wastewater treatment and recycling system according to an embodiment;
FIG. 2 is a schematic diagram of a longitudinal cross-sectional structure of the mariculture wastewater treatment and recycling system according to the embodiment;
in the figure: 1-a water inlet; 2-constructing a retaining wall; 3-a cultivation wastewater treatment area; 4-tail water deep purification area; 5-water outlet; 6-a communication port; 7-control middle atrium; 8-online monitoring equipment for water quality and water quantity; 9-oxygenation aeration equipment; 10-an intelligent control system; 11-water through holes; 12-filtering dam with biomass filler; 13-a salt tolerant aquatic plant ecosystem; 14-oxygenation aeration pipe network system; 15-gas flow regulating valve; 16-water passing channel; 17-ecological ditch plant community; 18-multiple stage reflux ports.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.
The mariculture wastewater treatment and recycling system of the embodiment is shown in fig. 1 and 2, and comprises a water inlet 1, a structure retaining wall 2, a culture wastewater treatment area 3, a tail water deep purification area 4, a water outlet 5, a communication port 6, a control atrium 7, a water quality and water quantity online monitoring device 8, an oxygen aeration device 9, an intelligent control system 10, a water passing hole 11, a biomass filler filtering dam 12, a salt-tolerant aquatic plant ecosystem 13, an oxygen aeration pipe network system 14, an air quantity regulating valve 15, a water passing channel 16, an ecological channel plant community 17 and a multi-stage return port 18.
Wherein, the control center chamber 7 is provided with an online water quality and water quantity monitoring device 8, an oxygen aeration device 9 and an intelligent control system 10. The water quality and water quantity online monitoring equipment 8 is connected with flow meters and water quality monitoring sensor probes, each flow meter is respectively positioned at a water inlet 1, a water outlet 5, a communication port 6 and a multi-stage backflow port 18, each water quality monitoring sensor probe is respectively positioned at the tail end of each stage of treatment units of the aquaculture wastewater treatment area 3 and the tail water deep purification area 4, and specific monitoring water quality indexes can be defined according to actual requirements. The intake pump is located water inlet 1 outside marine product cultivation regional end, and the level gauge is located cultivation waste water treatment zone 3, all is connected to wisdom control system 10. The adjusting pump is positioned at the tail end of the tail water deep purification area 4 and is connected with two pipelines, one pipeline is communicated to the outer side of the water outlet 5, and the other pipeline is communicated to the front end of the aquaculture wastewater treatment area 3 through the communication port 6. The reflux pump is positioned at the middle end of the tail water deep purification area 4 and is connected with three pipelines, and the reflux pump respectively leads to different stages of aquaculture wastewater treatment units of the aquaculture wastewater treatment area 3 through different multistage reflux ports 18. The water quality and water quantity online monitoring device 8 and the oxygenation aeration device 9 are connected with the intelligent control system 10, the water inlet pump, the regulating pump, the reflux pump and the oxygenation aeration device 9 are controlled by the intelligent control system 10 through water quality and water quantity data signals, the intelligent control system 10 can control the water quality and water quantity online monitoring device 8 according to actual needs, the problem of technical parameters such as monitoring frequency is determined, and the self-feedback control capability of the intelligent control system 10 is continuously optimized.
The aquaculture wastewater treatment area 3 is internally provided with an oxygenation aeration pipe network system 14 connected with oxygenation aeration equipment 9, each branch pipe network system is connected with a main pipe network system through a gas flow regulating valve 15, self-feedback control can be performed on the gas flow regulating valve 15 through an intelligent control system 10 according to water quality data obtained by a water quality monitoring sensor probe arranged in the aquaculture wastewater treatment area 3 so as to ensure that anaerobic, aerobic and facultative environments alternately appear in the aquaculture wastewater treatment area 3, meanwhile, a reflux pump and a one-way reflux type water passing gate of a multi-stage reflux port 18 are accurately controlled according to water quantity and water quality data of each area monitored in real time, a proper amount of multi-stage reflux water flow is ensured, reaction environment conditions of nitrification and denitrification are continuously optimized, and the total nitrogen removal capacity of the system is enhanced.
The aquaculture wastewater treatment area 3 comprises a plurality of levels of aquaculture wastewater treatment units, adjacent units are mutually communicated through water holes 11, the water hole planes of the water holes for passing in and out of each aquaculture wastewater treatment unit are arranged in diagonal positions, and each water hole is communicated to the near bottom of each flow direction unit through a pipeline as shown in figure 2. Each cultivation wastewater treatment unit is provided with a biomass filler filtering dam 12 and a salt-tolerant aquatic plant ecosystem 13, and the material of the biomass filler filtering dam 12 is Ca with good permeability and high adsorbability2+The group modified filler, salt-tolerant offshore aquatic plants such as canopies and the like are planted in the salt-tolerant aquatic plant ecosystem 13, and a root system container is filled with a solidified slow-release microbial preparation.
The tail end of the aquaculture wastewater treatment area 3 is communicated with the tail water deep purification area 4 through a water channel 16, a structure retaining wall 2 is arranged to form a baffling channel, an ecological ditch plant community 17 is planted in an ecological ditch intercepting area in the tail water deep purification area 4, and the planting density of the ecological ditch plant community can be configured according to actual engineering requirements.
When the liquid level of the aquaculture wastewater treatment area 3 is too low and the water amount is small, the intelligent control system starts a water inlet of the water inlet pump to ensure continuous and uniform water inlet; when the water quality at the tail end of the tail water deep purification area 4 cannot reach seawater quality standard (GB3097-1997), the intelligent control system opens a pipeline of a communicating port of the regulating pump, tail water at the tail end is pumped back to the aquaculture wastewater treatment area 3 for recycling treatment, and when the seawater quality standard (GB3097-1997) is met, the intelligent control system opens a pipeline of a water outlet of the regulating pump, and tail water at the tail end is discharged to the external offshore sea environment; when water quality indexes such as dissolved oxygen, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and the like in a culture wastewater treatment area and a tail water deep purification area lose dynamic balance, the intelligent control system starts the multi-stage backflow port of the backflow pump to ensure the reaction microenvironment of each area unit, so that each water quality index of each area reaches the optimum, the removal rate of total nitrogen in wastewater is improved, and the specific backflow amount and the backflow level are controlled according to actual conditions.
The technological process of the mariculture wastewater treatment and recycling system is as follows,
the system is built in a coastal sea area beach area, a water inlet 1 and a water outlet 5 of the system are adjacent to the coastal sea area, and the height of a peripheral retaining wall of the system is determined by fully considering the tidal condition of a building site.
1 department of water inlet sets up the gate, breed the level gauge that 3 front ends of wastewater treatment region set up, data transmission to wisdom control system 10 that water quality monitoring sensor probe will acquire in real time is taken into account to the flowmeter, through wisdom feedback real time control intake pump and water inlet gate, guarantee that aquaculture wastewater evenly lasts and gets into multistage wastewater treatment regional unit, and the water hole 11 of crossing that is linked together through multistage wastewater treatment regional unit flows step by step, it can refer to sewage treatment plant design to cross water hole 11, be located barricade upper end opening and all access to the nearly bottom position of wastewater treatment unit through the pipeline, all there is sufficient water conservancy dwell time with guaranteeing every grade of wastewater treatment unit.
Vertical biomass filler filtering dams 12 with proper permeability and high adsorbability are arranged at intervals in each stage of wastewater treatment unit, salt-tolerant aquatic plant ecosystems 13 are arranged in water areas among the biomass filtering dams and planted in salicornia and other salt-tolerant aquatic plants, a solidified microorganism slow-release device is arranged at root systems under the water surface and filled with a solidified slow-release microbial preparation, and nitrogen and phosphorus in wastewater are absorbed through synergistic effect of filler substrates, plants and microorganisms. Each wastewater treatment unit is provided with an oxygenation aeration branch pipe network system, each branch pipe network system is uniformly connected to the shore-side oxygenation aeration equipment 9 through a main pipe network, an air flow regulating valve 15 is arranged at the joint of each branch pipe network system and the main pipe network, and the oxygenation aeration equipment 9 and the air flow regulating valve 15 are subjected to real-time feedback control through an intelligent control system 10 according to obtained water quality and water quantity monitoring data so as to ensure that anaerobic, aerobic and facultative environments alternately appear and remove total nitrogen in wastewater.
The tail water treated by the aquaculture wastewater treatment area 3 enters the tail water deep purification area 4 through a water passing channel 16 communicated with the tail water deep purification area 4 through the aquaculture wastewater treatment area 3, the water passing channel 16 is a water channel type open channel positioned at the upper part of the retaining wall so as to ensure that the tail water uniformly flows into an ecological ditch plant community 17 in the tail water deep purification area 4, a baffling type channel is arranged in the area so as to prolong the hydraulic retention time of the wastewater in an ecological ditch, salt-tolerant submerged plants are planted on a river channel culture substrate in the area, and the tail water is further deeply purified.
The tail water deep purification area 4 is internally provided with a multi-stage return port 18 which is communicated with different stages of aquaculture wastewater treatment units of the aquaculture wastewater treatment area 3 and is provided with a water passing gate, a return pump and a flow meter. Controlling the reflux amount according to the water quantity and water quality data monitored in real time, so that the water quality indexes of dissolved oxygen, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and the like in each region reach dynamic balance, and the removal rate of total nitrogen in the wastewater is improved.
The tail end of the tail water deep purification area 4 is connected with a water inlet area of the aquaculture wastewater treatment area 3 and is separated through a water passing gate, the tail water deep purification area 4 is provided with a water outlet 5 and is provided with a water outlet gate, the tail end of the water outlet is provided with an adjusting pump, a liquid level meter, a flow meter and a water quality monitoring sensor probe, the adjusting pump, the water outlet gate and the water passing gate are controlled through data results, water can be discharged into an external offshore area when reaching seawater quality standard (GB3097-1997), and the water can flow back to the aquaculture wastewater treatment area through the water passing gate to be recycled if the water quality does not reach the standard.
The actual case field pilot-scale project is located at a pond-enclosing cultivation base at a certain position near the sea area in Zhejiang province, the cultivated marine products mainly comprise razor clams, blue crabs, prawns and the like, and the cultivation mode is comprehensive three-dimensional cultivation. The hydraulic retention time of the whole system was 36h, the sludge age was 90 days (d), and the raw water quality at the end of the mariculture area was as shown in table 1 below.
TABLE 1 mariculture wastewater quality
The carbon-nitrogen ratio (C/N ratio) in the mariculture wastewater is usually relatively low, but the salt content is relatively high, and the organic matters such as protein, fat and the like are relatively high and have certain biodegradability. COD in wastewater can be increased by three-dimensional high-density culture and bait feeding in field pilot plant engineeringCrThe culture domestication of the salt-tolerant microbial inoculum improves the feasibility of biochemical treatment of the wastewater, and the hydraulic retention time is respectively 18h, 24h, 30h, 36h, 42h and 48 h. Continuous monitoring shows that when the hydraulic retention time is 36 hours, the lowest recycling rate of the tail water by the adjusting pump is only about 10%, the backflow of different levels of the backflow pump is less than 10%, an intermittent starting mode is adopted according to the water quality index data monitored in real time, the final effluent has the best stable standard-reaching rate, and excessively short and excessively long hydraulic retention time can affect the wastewater treatment effect and increase the system operation energy consumption.
Through a quarterly continuous test monitoring, when the water temperature is 20 ℃, after the multi-stage circulating treatment, the treated water tends to be stable, and the COD isCrThe average removal rate of the catalyst is 97 percent, and the average effluent value is 10.86 mg/L; CODMnThe average removal rate of the catalyst is 97 percent, and the average effluent value is 2.19 mg/L; NH (NH)4 +The average removal rate of-N was 98%, the average effluent value was 0.2mg/L, and the nonionic ammonia concentration was 6.7X 10 by the nonionic ammonia conversion method-3mg/L；NO3 --N and NO2 -The effluent concentration of N decreases continuously; the average removal rate of Total Nitrogen (TN) is 58%, and the average effluent value is 18.45 mg/L; obtaining the inorganic nitrogen concentration of 0.03mg/L according to an inorganic nitrogen calculation method; the average removal rate of Total Phosphorus (TP) is 98%, the average value of effluent is 0.1mg/L, and the concentration of active phosphate is 0.02 mg/L; the temperature, the salt content and the pH value change are not obvious. Wherein the effluent concentration of TN has a continuous descending trend.
According to the index of seawater quality Standard (GB3097-1997), COD is used for evaluationMnThe non-ionic ammonia, the inorganic nitrogen, the active phosphate and the like are used as main assessment indexes, the water quality after treatment meets corresponding standards, the water quality standard of second-class seawater is achieved, the water quality is continuously excellent, and partial indexes are superior to the first-class standards.
Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the above description of the present invention, and such equivalents also fall within the scope of the appended claims.
Claims (8)
1. A mariculture waste water treatment and cyclic utilization system, its characterized in that includes:
a aquaculture wastewater treatment area for receiving the mariculture wastewater through a water inlet pump; the interior of the aquaculture wastewater treatment area is divided into a plurality of aquaculture wastewater treatment units which are mutually communicated through a structure retaining wall, and a plurality of biomass filler filter dams and salt-tolerant aquatic plant ecosystems are arranged in each aquaculture wastewater treatment unit;
the aeration pipe network system connected with the aeration equipment comprises a main pipe network system and branch pipe network systems which are arranged in the culture wastewater treatment area and correspond to the culture wastewater treatment units one by one, wherein each branch pipe network system is connected in parallel into the main pipe network system and is provided with a gas flow regulating device;
the tail water deep purification area is used for receiving tail water of the aquaculture wastewater treatment area, and effluent is recycled for mariculture; the interior of the tail water deep purification area is divided into a plurality of ecological ditch intercepting areas which are communicated with each other through a structure retaining wall, and ecological ditch plant communities are planted in each ecological ditch intercepting area.
2. The mariculture wastewater treatment and recycling system according to claim 1, wherein the adjacent mariculture wastewater treatment units are communicated through water passing holes, and the water passing hole for water inlet and the water passing hole for water outlet of each mariculture wastewater treatment unit are respectively located at two opposite sides and respectively close to the two opposite ends;
and each water through hole leads the water outlet end to be close to the bottom of the next cultivation wastewater treatment unit through a pipeline.
3. The mariculture wastewater treatment and recycling system according to claim 1, wherein the biomass packing filter dam and the salt-tolerant aquatic plant ecosystem are arranged at an interval;
the biomass filler filtering dam is formed by modifying and processing a biomass material matrix, wherein the biomass material matrix is Ca2+The group modified material comprises at least one of crushing, calcining and acid-base treatment;
the water surface area of the salt-tolerant aquatic plant ecosystem accounts for 8-15%;
the salt-tolerant aquatic plant ecosystem comprises a salt-tolerant aquatic plant planting area and a solidified microbial preparation slow-release area, wherein the salt-tolerant aquatic plant planting area is filled with planting matrixes and planted with salt-tolerant aquatic plants, and the solidified microbial preparation slow-release area is arranged at the root system position of the salt-tolerant aquatic plants and filled with solidified slow-release microbial preparation.
4. The mariculture wastewater treatment and recycling system according to claim 1, wherein the aeration branch pipes of the branch pipe network system are arranged at a certain distance, and the anti-clogging aeration heads are arranged on a single aeration branch pipe at a certain distance.
5. The mariculture wastewater treatment and recycling system according to claim 1, wherein the inside of the tail water deep purification area is provided with a structure retaining wall to transform the water channel between the ecological ditch intercepting areas into a baffling channel;
the baffling channel is designed in an arc shape;
the ecological ditch plant community comprises a plant planting and cultivating substrate and salt-tolerant submerged plants planted on the plant planting and cultivating substrate.
6. The mariculture wastewater treatment and recycling system according to any one of claims 1 to 5, wherein a plurality of reflux pumps are arranged in the tail water deep purification area, and an outlet of each reflux pump is connected with a plurality of reflux ports respectively communicated with different mariculture wastewater treatment units;
the tail water deep purification area is characterized in that a regulating pump is arranged at the water outlet end of the tail water deep purification area, the outlet of the regulating pump is connected with two pipelines, one pipeline is communicated with the water inlet end of the aquaculture wastewater treatment area through a communication port, and the other pipeline is used for seawater aquaculture.
7. The mariculture wastewater treatment and recycling system according to claim 6, further comprising a plurality of flowmeters and water quality monitoring sensor probes, wherein the flowmeters are respectively disposed at the water inlet end of the aquaculture wastewater treatment area, the water outlet end of the tail water deep purification area, the communication ports and the backflow ports, and the water quality monitoring sensor probes are respectively disposed at the water inlet end of the aquaculture wastewater treatment area, in each aquaculture wastewater treatment unit, and at the water outlet end of the tail water deep purification area.
8. The mariculture wastewater treatment and recycling system according to claim 7, further comprising a control system for controlling the aeration device, the gas flow adjusting device, the water inlet pump, the reflux pump and the adjusting pump according to the monitoring data of each flow meter and the water quality monitoring sensor probe.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800648A (en) * | 2021-10-14 | 2021-12-17 | 自然资源部天津海水淡化与综合利用研究所 | In-situ ecological treatment system and method for seawater culture tail water |
| CN117361812A (en) * | 2023-12-07 | 2024-01-09 | 广州市水之道环境科技有限公司 | Low-load aquaculture pond tail water recycling system |
-
2020
- 2020-02-28 CN CN202020225297.2U patent/CN212222570U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800648A (en) * | 2021-10-14 | 2021-12-17 | 自然资源部天津海水淡化与综合利用研究所 | In-situ ecological treatment system and method for seawater culture tail water |
| CN117361812A (en) * | 2023-12-07 | 2024-01-09 | 广州市水之道环境科技有限公司 | Low-load aquaculture pond tail water recycling system |
| CN117361812B (en) * | 2023-12-07 | 2024-03-15 | 广州市水之道环境科技有限公司 | Low-load aquaculture pond tail water recycling system |
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