CN111762974A

CN111762974A - COD (chemical oxygen demand) and ammonia nitrogen treatment method and system in culture wastewater

Info

Publication number: CN111762974A
Application number: CN202010665690.8A
Authority: CN
Inventors: 李平; 赵子宁; 钟建筑; 张德斌
Original assignee: Jingshan Junping Electromechanical Technology Co ltd
Current assignee: Jingshan Junping Electromechanical Technology Co ltd
Priority date: 2020-07-11
Filing date: 2020-07-11
Publication date: 2020-10-13

Abstract

The invention provides a method and a system for treating COD (chemical oxygen demand) and ammonia nitrogen in aquaculture wastewater, wherein the method for treating the COD and the ammonia nitrogen in the aquaculture wastewater comprises the following steps: carrying out coarse filtration treatment on the culture wastewater; carrying out solid-liquid separation on the aquaculture wastewater subjected to the pre-coarse filtration treatment; collecting and storing the solid-liquid separated wastewater liquid, and adjusting the wastewater flow introduced into the subsequent process; the regulated wastewater liquid enters an anaerobic tank for reaction; introducing the wastewater liquid subjected to anaerobic treatment into an aerobic tank for treatment; settling and filtering the wastewater liquid after aerobic treatment; carrying out advanced treatment on the wastewater liquid after sedimentation and filtration through multi-stage ammonia nitrogen remover adding equipment; carrying out advanced biochemical treatment and advanced adsorption treatment on the wastewater subjected to the advanced treatment of ammonia nitrogen; sterilizing and discharging after reaching the standard. The technical scheme of the invention solves the problem that the COD and ammonia nitrogen content of the treated aquaculture wastewater is still relatively high in the prior art.

Description

COD (chemical oxygen demand) and ammonia nitrogen treatment method and system in culture wastewater

Technical Field

The invention relates to the technical field of aquaculture wastewater treatment, in particular to a method and a system for treating COD (chemical oxygen demand) and ammonia nitrogen in aquaculture wastewater.

Background

The breeding wastewater mainly comes from livestock and poultry house flushing water, dripping drinking water, cooling water, farm domestic sewage and the like. The wastewater discharged by the large-scale farm every day is large and concentrated, and the wastewater contains a large amount of pollutants, particularly ammonia nitrogen and COD (chemical oxygen demand), which are seriously out of limits, wherein the COD refers to the oxygen amount required by oxidizing organic pollutants in water by using chemical oxidants, so that if the wastewater is discharged into the environment without treatment or is directly used for agriculture, the wastewater can cause serious pollution to the local ecological environment and farmlands.

The existing culture wastewater treatment methods mainly comprise the following steps: firstly, an energy comprehensive utilization scheme aims at the maximum economic benefit, biogas residues and biogas slurry are comprehensively utilized through anaerobic fermentation, the biogas is reused in a plant area after power generation, and the biogas residues and the biogas slurry are good organic fertilizers; and secondly, an energy source and energy saving and emission reduction scheme is adopted, energy saving and emission reduction are taken as main purposes, economic benefits are taken as auxiliary purposes, and suspended matters, COD (chemical oxygen demand) and ammonia nitrogen in the wastewater are removed by carrying out integral pretreatment and improved biological treatment on the wastewater, so that the wastewater reaches the standard of direct discharge. And thirdly, according to the sewage recycling scheme, aiming at the characteristics of long poultry breeding period and strong drainage intermittency, the wastewater is recycled for washing the poultry house after pretreatment, mixed treatment and disinfection.

In the prior art, in the treatment and standard discharge or treatment and recycling of the aquaculture wastewater, after the aquaculture wastewater is subjected to secondary biochemical treatment and other water purification treatment, compared with clean water sources such as tap water, the COD and ammonia nitrogen content in the aquaculture wastewater is still higher, so that the long-term accumulation inevitably causes influence or damage to the environment.

Disclosure of Invention

The invention mainly aims to provide a method and a system for treating COD (chemical oxygen demand) and ammonia nitrogen in aquaculture wastewater, so as to solve the problem that the COD and ammonia nitrogen content of the aquaculture wastewater after treatment are still relatively high in the prior art.

In order to achieve the above object, according to one aspect of the present application, there is provided a method for treating COD and ammonia nitrogen in aquaculture wastewater, comprising the steps of:

s10, pre-coarse filtration treatment, coarse filtration treatment of the culture wastewater, and wastewater storage;

s20, performing solid-liquid separation, namely performing solid-liquid separation on the aquaculture wastewater subjected to the preliminary coarse filtration treatment, discharging solid biogas residues, and continuously treating the wastewater liquid in the next step;

s30, collecting and adjusting water, collecting and storing the wastewater liquid after solid-liquid separation, and adjusting the wastewater flow introduced into the subsequent process;

s40, anaerobic treatment, and allowing the regulated wastewater liquid to enter an anaerobic tank for reaction;

s50, aerobic treatment, namely introducing the wastewater liquid subjected to the anaerobic treatment into an aerobic tank for treatment;

s60, settling and filtering the wastewater liquid after aerobic treatment, discharging settled substances, and continuing the next step of treatment of the wastewater liquid;

s70, performing ammonia nitrogen advanced treatment, namely performing advanced treatment on the wastewater liquid after sedimentation and filtration through multi-stage ammonia nitrogen remover adding equipment;

s80, COD advanced treatment, namely carrying out advanced biochemical treatment and advanced adsorption treatment on the wastewater subjected to the ammonia nitrogen advanced treatment;

and s90, sterilizing, and finally discharging the wastewater after reaching the standard through the sterilization treatment of a dosing system.

Further, step s70 includes the steps of:

s71, detecting the ammonia nitrogen concentration, namely detecting the ammonia nitrogen content in the wastewater to obtain the ammonia nitrogen concentration in the wastewater;

s72, determining the dosage and the speed of the remover, and determining the dosage and the speed of the ammonia nitrogen remover put into the wastewater according to the ammonia nitrogen concentration;

and s73, stirring in multiple batches in stages, adding the ammonia nitrogen remover in multiple batches in multiple stages at set dosage and set speed, and continuously mixing and stirring.

Further, step s80 includes the steps of:

s81, introducing ozone into the wastewater liquid;

s82, filtering by using a biological membrane, and carrying out biological membrane filtration treatment on the wastewater subjected to ozone inoculation;

and s83, adsorbing by using activated carbon, and carrying out activated carbon adsorption treatment on the wastewater filtered by the biological membrane.

Further, the biomembrane filtering method of step s82 adopts a biomembrane method using biological ceramsite as a carrier;

step s81 includes the following steps:

s811, detecting COD concentration in the wastewater, and recording;

s812, adjusting the dosage and the speed of ozone, and adjusting the dosage and the speed of ozone introduced into the wastewater according to the concentration of COD in the wastewater;

and s813, fully mixing the ozone and the wastewater, introducing the ozone into the bottom of the wastewater, and fully mixing and stirring at the bottom of the wastewater.

Further, step s10 includes removing large particulate matter, removing suspended matter, removing floating grease, and adsorbing ferrous metals in the water by mechanical grating; step s40, arranging high-efficiency biological elastic filler as a bacterial carrier in the anaerobic pool, and adding facultative microorganisms; the aerobic pool of s50 is divided into a front section and a rear section, a large number of microbial communities of different species are arranged on the filler arranged in the front section, the microbial communities participate in the biochemical degradation and adsorption of organic substances, the rear section degrades ammonia nitrogen in sewage under the condition of sufficient oxygen content through the action of nitrobacteria, and simultaneously, the COD value in the sewage is reduced. .

According to another aspect of this application, provide COD and ammonia nitrogen processing system in breed waste water, include: the pre-treatment device is used for carrying out coarse filtration treatment on the culture wastewater; the solid-liquid separator is connected with the pre-treatment device and is used for carrying out solid-liquid separation on the culture wastewater so as to continuously treat the separated liquid; the water collecting adjusting tank is connected with the solid-liquid separator, and is used for collecting and storing the wastewater liquid subjected to solid-liquid separation and adjusting the flow of wastewater introduced into the subsequent process; the biochemical pool comprises an anaerobic pool and an aerobic pool, the anaerobic pool is connected with the water collecting adjusting pool, the aerobic pool is connected with the anaerobic pool, the anaerobic pool is used for carrying out anaerobic treatment on the wastewater, and the aerobic pool is used for carrying out aerobic treatment on the wastewater treated by the anaerobic pool; the sedimentation tank is connected with the aerobic tank and is used for settling and filtering the wastewater liquid subjected to aerobic treatment; the ammonia nitrogen advanced treatment device is connected with the sedimentation tank and is used for deeply removing ammonia nitrogen by using an ammonia nitrogen remover; the COD advanced treatment device is connected with the ammonia nitrogen advanced treatment device and is used for carrying out advanced biochemical treatment and advanced adsorption treatment on the wastewater; and the disinfection discharge pool is connected with the COD advanced treatment device and is used for adding chemicals into the wastewater for sterilization.

Further, the ammonia nitrogen advanced treatment unit includes: the ammonia nitrogen treatment bin comprises a plurality of partitions, and the partitions are sequentially communicated; the ammonia nitrogen detection assembly comprises an ammonia nitrogen detector, and the ammonia nitrogen detector is arranged at a water inlet of the ammonia nitrogen advanced treatment device; the remover blanking assembly comprises a hopper, a discharge port and a vibrator, the lower end of the hopper is connected with the discharge port, and the vibrator is arranged on the side wall of the hopper; the mixing and stirring assembly comprises a first stirrer and a second stirrer, and the rotation axes of the first stirrer and the second stirrer are perpendicular to each other; the ammonia nitrogen treatment controller is electrically connected with the ammonia nitrogen detection assembly, the remover blanking assembly and the mixing and stirring assembly; the upper part of each subarea is respectively provided with a group of remover blanking components, and the inside of each subarea is respectively provided with a group of mixing and stirring components.

Further, the COD advanced treatment unit comprises: the COD detector is arranged at the water inlet of the COD advanced treatment device; the ozone access assembly comprises an ozone treatment bin, and an air inlet of the ozone access assembly is formed in the bottom of the ozone treatment bin; the biological membrane filtering component comprises a filtering bin and a biological membrane filtering device, and the biological membrane filtering device is detachably arranged in the filtering bin; an activated carbon adsorption component; the activated carbon adsorption component comprises an adsorption bin and an activated carbon adsorption device, and the activated carbon adsorption device is detachably arranged in the adsorption bin; the COD treatment controller is electrically connected with the COD detector and the ozone access assembly.

Furthermore, the filtering bin comprises a filtering water storage area and a biological filtering area, the bottom of the filtering water storage area is communicated with the bottom of the biological filtering area, and the water outlet end of the biological filtering area is lower than the water inlet end of the filtering water storage area; the biological membrane filtering device comprises a supporting net, biological boxes, biological ceramsite and filtering organisms, wherein the filtering organisms and the biological ceramsite are all placed in the biological boxes, and the biological boxes are uniformly arranged on the supporting net; the plurality of the biological membrane filtering devices are horizontally arranged in the biological filtering area in parallel.

Furthermore, the adsorption bin comprises an adsorption water storage area and an active carbon adsorption area, the bottoms of the adsorption water storage area and the active carbon adsorption area are communicated, a water inlet of the adsorption water storage area is a water outlet end of the biological filtration area, and a water outlet end of the active carbon adsorption area is lower than a water inlet end of the adsorption water storage area; the active carbon adsorption device has a plurality ofly, and the setting that a plurality of active carbon adsorption device levels and be parallel to each other is in the active carbon adsorption district.

By applying the technical scheme of the invention, firstly, the aquaculture wastewater is subjected to coarse filtration treatment by the pre-treatment device to remove soft entanglement, larger solid particle sundries and floating objects in domestic sewage, thereby protecting the service life of a subsequent working water pump and reducing the system treatment workload. And (4) carrying out solid-liquid separation on the wastewater after the coarse filtration by using a solid-liquid separator, discharging solid biogas residues, and continuously treating the wastewater liquid by the next step. The wastewater liquid enters the water collecting adjusting tank to adjust and homogenize the water quantity and the water quality, so that the balance and stability of the water quantity and the water quality of a subsequent biochemical treatment system are ensured, a certain degradation effect on organic matters in the sewage is achieved, and the impact resistance and the treatment effect of the whole system are improved.

Secondly, the waste water in the regulating reservoir that catchments gets into biochemical pond in proper order and handles, further mixes the sewage in the anaerobism pond, high-efficient biological elastic filler in the make full use of pond is as the bacterium carrier, relies on the facultative aerobe to turn into indissolvable organic matter in the sewage, hydrolysises macromolecule organic matter into the micromolecule organic matter to do benefit to the further oxidative decomposition of good oxygen pond, simultaneously through the nitrocarbon nitrogen of backward flow under the effect of nitrobacteria, can carry out partial nitrification and denitrification, get rid of the ammonia nitrogen. The waste water of anaerobism pond processing gets into good oxygen pond immediately, good oxygen pond anterior segment is under higher organic load, through biochemical degradation and the adsorption of being attached to the microbial community of a large amount of different species on the filler under participating in jointly, remove various organic substance in the sewage, make the organic matter content in the sewage reduce by a wide margin, the back end is under the lower condition of organic load, through the effect of nitrobacteria, descend the ammonia nitrogen of decomposing in the sewage under the sufficient condition of oxygen content, also make the COD value in the sewage reduce to lower level simultaneously, make sewage purify. The wastewater treated by the biochemical tank enters a sedimentation tank for solid-liquid separation to remove a biofilm and suspended sludge peeled off from the biochemical tank, so that the wastewater is really purified.

And finally, the method is also the most important link and carries out advanced treatment on ammonia nitrogen and COD. And (3) introducing the wastewater after sedimentation into an ammonia nitrogen advanced treatment device, and carrying out advanced treatment on the wastewater liquid after sedimentation and filtration through multi-stage ammonia nitrogen remover adding equipment, wherein the ammonia nitrogen remover has obvious removal effect and short time. And then, the wastewater without ammonia nitrogen enters a COD advanced treatment device, and the wastewater is subjected to advanced biochemical and activated carbon advanced adsorption combined treatment in the COD advanced treatment device, so that the COD is reduced to lower concentration. Finally, the wastewater is disinfected and sterilized in a disinfection discharge pool, so that the wastewater reaches the standard and is discharged.

The technical scheme of the invention effectively solves the problem that the COD and ammonia nitrogen content of the treated aquaculture wastewater is still relatively high in the prior art.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a flow chart of a method for treating COD and ammonia nitrogen in aquaculture wastewater according to an embodiment of the invention;

FIG. 2 shows a flow chart of ammonia nitrogen deep treatment;

FIG. 3 shows a flow chart of COD advanced treatment;

FIG. 4 shows an ozone access flow chart of COD advanced treatment;

FIG. 5 shows a system block diagram of a COD and ammonia nitrogen treatment system in aquaculture wastewater according to an embodiment of the invention;

FIG. 6 is a schematic diagram showing the structure of the ammonia nitrogen advanced treatment device in FIG. 5;

FIG. 7 is a schematic view showing the structure of the COD advanced treatment apparatus shown in FIG. 5.

Wherein the figures include the following reference numerals:

10. a pre-processing device; 20. a solid-liquid separator; 30. a water collecting and adjusting tank; 40. a biochemical pool; 41. an anaerobic tank; 42. an aerobic tank; 50. a sedimentation tank; 60. an ammonia nitrogen deep treatment device; 61. an ammonia nitrogen treatment bin; 611. partitioning; 62. an ammonia nitrogen detection component; 621. an ammonia nitrogen detector; 63. a remover blanking assembly; 631. a hopper; 632. a discharge port; 633. a vibrator; 64. a mixing and stirring component; 641. a first stirrer; 642. a second agitator; 65. an ammonia nitrogen treatment controller; 70. a COD advanced treatment device; 71. a COD detector; 72. an ozone access assembly; 721. an ozone treatment bin; 73. a biofilm filtration module; 731. a filtering bin; 7311. filtering the water storage area; 7312. a biological filtration zone; 732. a biofilm filtration device; 7321. a support net; 7322. a biological cassette; 7323. biological ceramsite; 74. an activated carbon adsorption component; 741. an adsorption bin; 7411. an adsorption water storage area; 7412. an activated carbon adsorption zone; 742. an activated carbon adsorption unit; 75. a COD treatment controller; 80. and (4) disinfecting the discharge pool.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.

As shown in fig. 1-4, an embodiment of the present invention provides a method for treating COD and ammonia nitrogen in aquaculture wastewater, and fig. 1 is a flow chart of the method for treating COD and ammonia nitrogen in aquaculture wastewater, wherein the flow chart comprises the following steps:

As shown in fig. 2, fig. 2 is a further method flow of step s70, that is, a process of ammonia nitrogen advanced treatment, specifically including the following steps:

As shown in fig. 3, fig. 3 is a further method flow of step s80, that is, a process of COD deep treatment, which specifically includes the following steps:

s81, introducing ozone into the wastewater liquid;

s83, performing activated carbon adsorption, and performing activated carbon adsorption treatment on the wastewater filtered by the biological membrane;

further, in the technical solution of this embodiment, the biofilm filtering method in step s82 adopts a biofilm method using bio-ceramsite as a carrier.

As shown in fig. 4, fig. 4 is a further method flow of step s81, which is a process of ozone access, and specifically includes the following steps:

s811, detecting COD concentration in the wastewater, and recording;

Further, in the technical solution of this embodiment, step s10 includes removing large particulate matter, removing suspended matter, removing floating grease, and adsorbing ferrous metal in water by a mechanical grid; step s40, arranging high-efficiency biological elastic filler as a bacterial carrier in the anaerobic pool, and adding facultative microorganisms; the aerobic tank in the step s50 is divided into a front section and a rear section, a large number of microbial communities of different species are arranged on the filler arranged in the front section, the microbial communities participate in the biochemical degradation and adsorption of organic substances, and the rear section degrades ammonia nitrogen in the sewage under the condition of sufficient oxygen through the action of nitrobacteria and simultaneously reduces the COD value in the sewage.

The embodiment of the invention also provides a COD and ammonia nitrogen treatment system in the aquaculture wastewater, and the COD and ammonia nitrogen treatment system in the aquaculture wastewater can be used for executing the COD and ammonia nitrogen treatment method in the aquaculture wastewater provided by the embodiment of the invention. The COD and ammonia nitrogen treatment system provided by the embodiment of the invention is introduced below.

As shown in fig. 5-7, an embodiment of the present invention provides a system for treating COD and ammonia nitrogen in aquaculture wastewater, including: the pre-treatment device 10 is used for carrying out coarse filtration treatment on the aquaculture wastewater by the pre-treatment device 10; the solid-liquid separator 20, the solid-liquid separator 20 is connected with the pre-treatment device 10, the solid-liquid separator 20 carries out solid-liquid separation on the breeding wastewater, and the separated liquid is treated continuously; the water collecting adjusting tank 30 is connected with the solid-liquid separator 20, and the water collecting adjusting tank 30 collects and stores the wastewater liquid subjected to solid-liquid separation and adjusts the flow of wastewater introduced into the subsequent process; the biochemical tank 40 comprises an anaerobic tank 41 and an aerobic tank 42, the anaerobic tank 41 is connected with the water collecting adjusting tank 30, the aerobic tank 42 is connected with the anaerobic tank 41, the anaerobic tank 41 is used for carrying out anaerobic treatment on the wastewater, and the aerobic tank 42 is used for carrying out aerobic treatment on the wastewater treated by the anaerobic tank 41; a sedimentation tank 50, wherein the sedimentation tank 50 is connected with the aerobic tank 42, and the sedimentation tank 50 is used for settling and filtering the wastewater liquid subjected to aerobic treatment; the ammonia nitrogen advanced treatment device 60 is characterized in that the ammonia nitrogen advanced treatment device 60 is connected with the sedimentation tank 50, and the ammonia nitrogen advanced treatment device 60 deeply removes ammonia nitrogen by using an ammonia nitrogen remover; the COD advanced treatment device 70 is connected with the ammonia nitrogen advanced treatment device 60, and the COD advanced treatment device 70 carries out advanced biochemical treatment and advanced adsorption treatment on the wastewater; and the disinfection discharge tank 80 is connected with the COD advanced treatment device 70, and the disinfection discharge tank 80 adds drugs to the wastewater for sterilization.

By applying the technical scheme of the invention, firstly, the aquaculture wastewater enters the pre-treatment device 10 for coarse filtration treatment to remove soft entanglement, larger solid particle sundries and floating objects in the domestic wastewater, thereby protecting the service life of a subsequent working water pump and reducing the system treatment workload. The wastewater after the coarse filtration is subjected to solid-liquid separation by a solid-liquid separator 20, solid biogas residues are discharged, and the wastewater liquid is continuously treated in the next step. The wastewater liquid enters the water collecting adjusting tank 30 to adjust and homogenize the water quantity and the water quality, so that the balance and stability of the water quantity and the water quality of a subsequent biochemical treatment system are ensured, a certain degradation effect on organic matters in the wastewater is achieved, and the impact resistance and the treatment effect of the whole system are improved. Secondly, the waste water in the water collecting adjusting tank 30 sequentially enters the biochemical tank 40 for treatment, the sewage is further mixed in the anaerobic tank 41, the high-efficiency biological elastic filler in the tank is fully utilized as a bacteria carrier, the indissolvable organic matters in the sewage are converted into soluble organic matters by facultative microorganisms, and the macromolecular organic matters are hydrolyzed into micromolecular organic matters so as to be beneficial to further oxidative decomposition of the aerobic tank 42, and meanwhile, partial nitrification and denitrification can be carried out through the returned nitrocarbon nitrogen under the action of nitrobacteria to remove ammonia nitrogen. The waste water that the anaerobism pond 41 was handled gets into good oxygen pond 42 immediately, good oxygen pond 42 anterior segment is under higher organic load, through biochemical degradation and the adsorption of attaching to the microbial community of a large amount of different species on the filler under participating in jointly, remove various organic substance in the sewage, make the organic matter content in the sewage reduce by a wide margin, the back end is under the lower condition of organic load, through the effect of nitrobacteria, the ammonia nitrogen in the sewage is decomposed in the sufficient condition of oxygen content, also make the COD value in the sewage reduce to lower level simultaneously, make sewage purify. The wastewater treated by the biochemical tank 40 enters a sedimentation tank 50 for solid-liquid separation to remove a biofilm and suspended sludge peeled off from the biochemical tank, so that the wastewater is really purified. And finally, the method is also the most important link and carries out advanced treatment on ammonia nitrogen and COD. The wastewater after sedimentation is introduced into an ammonia nitrogen advanced treatment device 60, and the wastewater liquid after sedimentation and filtration is subjected to advanced treatment by a multi-stage ammonia nitrogen remover adding device, so that the ammonia nitrogen remover has obvious removal effect and short time. Then, the wastewater without ammonia nitrogen enters the COD advanced treatment device 70, and the advanced biochemical treatment and the advanced adsorption treatment of activated carbon are carried out on the wastewater in the COD advanced treatment device 70, so that the COD is reduced to lower concentration. Finally, the wastewater is disinfected and sterilized in a disinfection discharge pool, so that the wastewater reaches the standard and is discharged. The technical scheme of the invention effectively solves the problem that the COD and ammonia nitrogen content of the treated aquaculture wastewater is still relatively high in the prior art.

It should be noted that, a submersible sewage pump is arranged in the water collection regulating tank 30, after the sewage is uniformly measured, the homogenized sewage is lifted to the post-stage treatment, two submersible sewage pumps (one for one) are arranged, a liquid level control system is adopted, and a non-blocking tearing sundry pump is adopted as a water pump. The anaerobic tank 41 is internally provided with high-efficiency biological elastic filler, has a hydrolysis acidification function, and can be adjusted into an O-level biological oxidation tank to increase biochemical retention time and improve treatment efficiency. The number of the aerobic tanks 42 is at least one, and two or more tanks may be provided for better aerobic effect. The good oxygen pond comprises cell body, filler, water distribution device and oxygenating aeration system etc. part, this pond uses biofilm process as the owner, have the characteristics of activated sludge process concurrently, the filler adopts elasticity three-dimensional combination filler in the pond, this filler has specific surface area big, long service life, it is easy to hang corrosion-resistant the blocking of agglomerating of membrane, the filler freely stretches out in aqueous, do multi-level cutting to the aquatic bubble, the aeration effect has more increased relatively, the filler becomes cage installation, it is convenient to dismantle, overhaul, this pond divides the second grade, make quality of water degrade into the gradient, reach good treatment effect, corresponding water conservancy diversion turbulent flow measure is adopted in the simultaneous design, make overall design more rationalize, aeration pipeline chooses for use high-quality ABS pipe in the pond, it is corrosion-resistant, unblock, oxygen utilization rate is high. The sedimentation tank 50 is maliciously designed into a vertical flow sedimentation tank, the sludge degradation effect is good, sludge is discharged to the sludge tank at regular time by adopting an air stripping method, a sludge air stripping reflux device is arranged, part of sludge flows back to the anaerobic tank 41 to be nitrified and denitrified, the generation of sludge is reduced, and the removal of ammonia nitrogen in sewage is facilitated.

As shown in fig. 6, in the technical solution of this embodiment, the ammonia nitrogen advanced treatment device 60 includes: the ammonia nitrogen treatment bin 61 comprises a plurality of partitions 611, and the bottoms of the partitions 611 are sequentially communicated; the ammonia nitrogen detection assembly 62 comprises an ammonia nitrogen detector 621, and the ammonia nitrogen detector 621 is arranged at a water inlet of the ammonia nitrogen advanced treatment device 60; the remover blanking assembly 63 comprises a hopper 631, a discharge port 632 and a vibrator 633, the lower end of the hopper 631 is connected with the discharge port 632, and the vibrator 633 is arranged on the side wall of the hopper 631; a mixing and stirring assembly 64 including a first stirrer 641 and a second stirrer 642, the rotation axes of the first stirrer 641 and the second stirrer 642 being perpendicular to each other; the ammonia nitrogen treatment controller 65 is electrically connected with the ammonia nitrogen detection component 62, the remover blanking component 63 and the mixing and stirring component 64; a group of remover blanking assemblies 63 are arranged at the upper part of each subarea 611, and a group of mixing and stirring assemblies 64 are arranged inside each subarea.

It should be noted that, in the above embodiment, the setting of the plurality of partitions 611 makes the removal effect of the ammonia nitrogen remover better, and can form a multi-level and multi-level removal agent addition effect, so that the ammonia nitrogen remover can react with the wastewater more sufficiently, and the ammonia nitrogen remover and the wastewater are fully mixed, thereby reducing the waste of the ammonia nitrogen remover and relatively reducing the usage amount of the ammonia nitrogen remover. The first and

second agitators

641 and 642 of the mixing and agitating assembly 64 agitate vertically with respect to each other so that the agitation is more complete. The first agitators 641 of the plurality of partitions 611 are connected in series and driven by one driving means, and the second agitators 642 of the plurality of partitions 611 are driven by different driving means, respectively. The remover blanking assembly 63 sets the blanking amount and the blanking speed according to the detection of the ammonia nitrogen content by the ammonia nitrogen detector 621, and the blanking mode is gradual, so that the reaction effect is better. The ammonia nitrogen is removed by adding the ammonia nitrogen remover, the ammonia nitrogen removal rate is high, and the effect is good.

As shown in fig. 7, in the present embodiment, the COD deep treatment apparatus 70 includes: a COD detector 71, wherein the COD detector 71 is arranged at the water inlet of the COD advanced treatment device 70; the ozone access assembly 72, the ozone access assembly 72 includes an ozone treatment bin 721, and an air inlet of the ozone access assembly 72 is arranged at the bottom of the ozone treatment bin 721; a biofilm filtering assembly 73, wherein the biofilm filtering assembly 73 comprises a filtering bin 731 and a biofilm filtering device 732, and the biofilm filtering device 732 is detachably arranged in the filtering bin 731; an activated carbon adsorption module 74; the activated carbon adsorption component 74 comprises an adsorption bin 741 and an activated carbon adsorption device 742, and the activated carbon adsorption device 742 is detachably arranged in the adsorption bin 741; the COD treatment controller 75 and the COD treatment controller 75 are electrically connected with the COD detector 71 and the ozone access component 72. The ozone access assembly 72 comprises an ozone treatment bin 721, an ozone generator, an ozone spray pipe and a stirring device, wherein the stirring device is arranged in the ozone treatment bin 721, a nozzle of the ozone spray pipe is arranged at the bottom of the ozone bin, the ozone generator is connected with the ozone spray pipe, the ozone access assembly 72 further comprises an electric pump, and the electric pump is arranged between the ozone generator and the ozone spray pipe.

It should be noted that, because ozone is a strong oxidant, it can oxidize many complex organic matters into simple organic matters, so that non-biodegradable components are converted into biodegradable components, ozone is decomposed into oxygen, and no other harmful substances are generated, and the ozone access assembly 72 realizes the above process. The ozone air inlet sets up in the bottom makes the contact of ozone and waste water simultaneously, can play the intensive mixing effect. After ozone is added, organic matters which are difficult to degrade or can not be biochemically degraded are decomposed to a certain degree and are converted into biodegradable organic matters, so that the biodegradability of the sewage is improved. Then enters the biological membrane filtering component 73 for biochemical treatment, so that the organic matters added after the ozone treatment are further degraded, and the COD in the water is further reduced. However, the most economical treatment process for further degrading COD in sewage by adopting biochemical treatment has the disadvantages that the COD concentration of treated effluent is difficult to reach a very low level, and when the required COD value is very low, other measures are still needed. Therefore, the wastewater treated by the biofilm filter assembly 73 enters the activated carbon adsorption assembly 74 for adsorption, and the huge surface area of the activated carbon is used for adsorbing organic matters in the water, so that the COD in the water is reduced to a lower degree.

As shown in fig. 7, in the technical solution of this embodiment, the filtering bin 731 includes a filtering water storage area 7311 and a biological filtering area 7312, the filtering water storage area 7311 is communicated with the bottom of the biological filtering area 7312, and the water outlet end of the biological filtering area 7312 is lower than the water inlet end of the filtering water storage area 7311; the biofilm filtering device 732 comprises a supporting net 7321, biological boxes 7322, biological ceramsite 7323 and filtering organisms, wherein the filtering organisms and the biological ceramsite 7323 are all placed in the biological boxes 7322, and a plurality of biological boxes 7322 are uniformly arranged on the supporting net 7321; the plurality of biofilm filtering devices 732 are disposed in the biofiltering zone 7312 horizontally and in parallel. The filtering water storage area 7311 and the biological filtering area 7312 form a communicating vessel, so that the waste water is stored after entering the filtering bin 731, and then the water level is raised slowly, so that the retention time of the waste water in the filtering bin 731 is prolonged, and the biological membrane filtering device 732 is arranged in parallel in the biological filtering area 7312, so that the biological membrane filtering device 732 is fully contacted with the waste water, and the biochemical effect is effectively improved.

As shown in fig. 7, in the technical solution of this embodiment, the adsorption bin 741 includes an adsorption water storage area 7411 and an activated carbon adsorption area 7412, the bottoms of the adsorption water storage area 7411 and the activated carbon adsorption area 7412 are communicated, a water inlet of the adsorption water storage area 7411 is a water outlet of the biological filtering area 7312, and a water outlet of the activated carbon adsorption area 7412 is lower than a water inlet of the adsorption water storage area 7411; there are a plurality of activated carbon adsorption devices 742, and the plurality of activated carbon adsorption devices 742 are horizontally and parallel to each other in the activated carbon adsorption zone 7412. Adsorb the form that water storage area 7411 and active carbon adsorption district 7412 constitute the linker to make waste water get into after adsorbing the storehouse 741, store earlier, then the water level slowly risees, waste water detention time is prolonged in adsorbing the storehouse 741 like this, through the active carbon adsorption device 742 of mutual parallel arrangement in active carbon adsorption district 7412, thereby make active carbon adsorption device 742 and waste water fully contact, effective active carbon adsorption effect, make COD in the waste water drop to lower level.

It should be noted that the embodiments of the present application may be provided as a method, system, apparatus implementing a system, or computer program product, as will be appreciated by one of skill in the art. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A treatment method of COD and ammonia nitrogen in aquaculture wastewater is characterized by comprising the following steps:

2. The method for treating COD and ammonia nitrogen in aquaculture wastewater according to claim 1, wherein the step s70 comprises the following steps:

3. The method for treating COD and ammonia nitrogen in aquaculture wastewater according to claim 1, wherein the step s80 comprises the following steps:

s81, introducing ozone into the wastewater liquid;

4. The method for treating COD and ammonia nitrogen in aquaculture wastewater according to claim 3, wherein the biofilm filtration method in step s82 adopts a biofilm method with biological ceramsite as a carrier;

said step s81 comprises the steps of:

s811, detecting COD concentration in the wastewater, and recording;

5. The treatment method of COD and ammonia nitrogen in aquaculture wastewater according to claim 1, wherein the step s10 comprises removing large particulate matter, removing suspended matter, removing floating grease and adsorbing ferrous metals in water by mechanical grid; the anaerobic pool of the step s40 is internally provided with high-efficiency biological elastic filler as a bacterial carrier, and facultative microorganisms are put in; the aerobic tank of the s50 is divided into a front section and a rear section, a large number of microbial communities of different species are arranged on the filler arranged in the front section, the microbial communities participate in the biochemical degradation and adsorption of organic substances, and the rear section degrades ammonia nitrogen in sewage under the condition of sufficient oxygen content through the action of nitrobacteria and simultaneously reduces the COD value in the sewage.

6. The utility model provides a COD and ammonia nitrogen processing system in breed waste water which characterized in that includes:

the pre-treatment device (10), the pre-treatment device (10) carries out coarse filtration treatment on the breeding wastewater;

the solid-liquid separator (20), the solid-liquid separator (20) is connected with the pre-treatment device (10), the solid-liquid separator (20) performs solid-liquid separation on the culture wastewater, and the separated liquid is treated continuously;

the water collecting adjusting tank (30), the water collecting adjusting tank (30) is connected with the solid-liquid separator (20), the water collecting adjusting tank (30) collects and stores the wastewater liquid after solid-liquid separation, and adjusts the wastewater flow introduced into the subsequent process;

the biochemical tank (40) comprises an anaerobic tank (41) and an aerobic tank (42), the anaerobic tank (41) is connected with the water collecting adjusting tank (30), the aerobic tank (42) is connected with the anaerobic tank (41), the anaerobic tank (41) is used for carrying out anaerobic treatment on wastewater, and the aerobic tank (42) is used for carrying out aerobic treatment on the wastewater treated by the anaerobic tank (41);

the sedimentation tank (50), the sedimentation tank (50) is connected with the aerobic tank (42), and the sedimentation tank (50) is used for settling and filtering the wastewater liquid subjected to aerobic treatment;

the ammonia nitrogen advanced treatment device (60) is connected with the sedimentation tank (50), and the ammonia nitrogen advanced treatment device (60) is used for deeply removing ammonia nitrogen by using an ammonia nitrogen remover;

the COD advanced treatment device (70), the COD advanced treatment device (70) is connected with the ammonia nitrogen advanced treatment device (60), and the COD advanced treatment device (70) carries out advanced biochemical treatment and advanced adsorption treatment on the wastewater;

the device comprises a disinfection discharge tank (80), wherein the disinfection discharge tank (80) is connected with the COD advanced treatment device (70), and the disinfection discharge tank (80) is used for adding drugs and sterilizing wastewater.

7. The COD and ammonia nitrogen treatment system in aquaculture wastewater according to claim 6, wherein the ammonia nitrogen advanced treatment device (60) comprises:

the ammonia nitrogen treatment bin (61) comprises a plurality of partitions (611), and the partitions (611) are sequentially communicated;

the ammonia nitrogen detection assembly (62), the ammonia nitrogen detection assembly (62) comprises an ammonia nitrogen detector (621), and the ammonia nitrogen detector (621) is arranged at a water inlet of the ammonia nitrogen deep treatment device (60);

the remover blanking assembly (63) comprises a hopper (631), a discharge port (632) and a vibrator (633), the lower end of the hopper (631) is connected with the discharge port (632), and the vibrator (633) is mounted on the side wall of the hopper (631);

a mixing and agitating assembly (64), the mixing and agitating assembly (64) comprising a first agitator (641) and a second agitator (642), the first agitator (641) and the second agitator (642) having rotational axes that are perpendicular to each other;

the ammonia nitrogen treatment controller (65), the ammonia nitrogen treatment controller (65) is electrically connected with the ammonia nitrogen detection component (62), the remover blanking component (63) and the mixing and stirring component (64);

a group of remover blanking assemblies (63) are arranged at the upper part of each subarea (611), and a group of mixing and stirring assemblies (64) are arranged in each subarea (611).

8. The system for treating COD and ammonia nitrogen in aquaculture wastewater according to claim 6, wherein the COD advanced treatment device (70) comprises:

the COD detector (71), the COD detector (71) is arranged at the water inlet of the COD advanced treatment device (70);

the ozone access assembly (72) comprises an ozone treatment bin (721), and an air inlet of the ozone access assembly (72) is formed in the bottom of the ozone treatment bin (721);

a biofilm filtration assembly (73), the biofilm filtration assembly (73) comprising a filtration cartridge (731) and a biofilm filtration device (732), the biofilm filtration device (732) being removably disposed within the filtration cartridge (731);

an activated carbon adsorption module (74); the activated carbon adsorption component (74) comprises an adsorption bin (741) and an activated carbon adsorption device (742), and the activated carbon adsorption device (742) is detachably arranged in the adsorption bin (741);

the COD treatment controller (75), COD treatment controller (75) with COD detector (71) with ozone access component (72) electric connection.

9. The COD and ammonia nitrogen treatment system in aquaculture wastewater according to claim 8, wherein the filtration bin (731) comprises a filtration water storage area (7311) and a biological filtration area (7312), the filtration water storage area (7311) is communicated with the bottom of the biological filtration area (7312), and the water outlet end of the biological filtration area (7312) is lower than the water inlet end of the filtration water storage area (7311); the biofilm filtering device (732) comprises a supporting net (7321), a biological box (7322), biological ceramsite (7323) and filtering organisms, wherein the filtering organisms and the biological ceramsite (7323) are placed in the biological box (7322), and a plurality of biological boxes (7322) are uniformly arranged on the supporting net (7321); the plurality of the biological membrane filtering devices (732) are arranged in the biological filtering area (7312) horizontally and in parallel.

10. The COD and ammonia nitrogen treatment system in aquaculture wastewater according to claim 9, wherein the adsorption bin (741) comprises an adsorption water storage area (7411) and an activated carbon adsorption area (7412), the adsorption water storage area (7411) is communicated with the bottom of the activated carbon adsorption area (7412), the water inlet of the adsorption water storage area (7411) is the water outlet end of the biological filtration area (7312), and the water outlet end of the activated carbon adsorption area (7412) is lower than the water inlet end of the adsorption water storage area (7411); the activated carbon adsorption devices (742) are arranged in the activated carbon adsorption area (7412) horizontally and in parallel.