Aquaculture wastewater treatment system

Abstract

The utility model discloses an aquaculture wastewater treatment system which comprises a water quality on-line monitoring system, a control system, in-situ treatment equipment, a solid-liquid separation device, a photocatalytic disinfection device, an ultrafiltration system and a reverse osmosis / nanofiltration system, the control system is in electric signal connection with the water quality on-line monitoring system, the in-situ treatment equipment is communicated with an aquaculture pond body, and the solid-liquid separation device is communicated with the reverse osmosis / nanofiltration system. The solid-liquid separation device is communicated with the in-situ treatment equipment, the photocatalytic disinfection device is respectively communicated with the in-situ treatment equipment and the solid-liquid separation device, the ultrafiltration system is communicated with the in-situ treatment equipment, and the reverse osmosis / nanofiltration system is communicated with the ultrafiltration system. In-situ treatment equipment, a solid-liquid separation device, a photocatalytic disinfection device, an ultrafiltration system and a reverse osmosis / nanofiltration system are integrated into the system, various pollutants in aquaculture wastewater can be treated, and automatic process matching can be achieved through a water quality online monitoring system and a control system; and near-zero emission of aquaculture wastewater is realized through the design of a water return structure.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to an aquaculture wastewater treatment system. Background Art

[0002] With the rapid development of my country's aquaculture industry, the environmental problems caused by the arbitrary discharge of aquaculture wastewater have become a matter of great concern to the country and the industry. In high-density aquaculture water bodies, fish and shrimp excrement and bait residues will deteriorate rapidly under the decomposition of bacteria. If the wastewater generated during the aquaculture process is not treated in time, it will not only affect the quantity and quality of the aquaculture organisms, but also cause serious environmental pollution if discharged at will.

[0003] At present, typical aquaculture wastewater treatment processes include physical filtration, ecological wetland method, multi-stage filtration method, ecological recirculating aquaculture method, etc. The physical filtration method cannot remove ammonia, nitrogen, and phosphorus, and the filler replacement is inconvenient. The ecological wetland method is not suitable for high-density aquaculture industry. The multi-stage filtration method has not solved the problem of excessive COD and ammonia nitrogen. The ecological recirculating aquaculture method is limited by seasonality and regionality. Utility Model Content

[0004] The embodiment of the present application provides an aquaculture wastewater treatment system, which is used to provide an aquaculture wastewater treatment solution with a wider range of applications and less wastewater discharge.

[0005] The present application embodiment provides an aquaculture wastewater treatment system, comprising:

[0006] The water quality online monitoring system is used to detect the composition of aquaculture wastewater in aquaculture ponds;

[0007] A control system, connected to the water quality online monitoring system by electrical signals, for receiving data information transmitted by the water quality online monitoring system;

[0008] An in-situ treatment device, connected to the aquaculture pond, for filtering impurities in the aquaculture wastewater;

[0009] A solid-liquid separation device, connected to the in-situ treatment equipment, for separating solids from liquids in the aquaculture wastewater;

[0010] A photocatalytic disinfection device, which is connected to the in-situ treatment equipment and the solid-liquid separation device, respectively, and is used to decompose organic toxins, organic matter and ammonia nitrogen;

[0011] An ultrafiltration system, connected to the in-situ treatment equipment, for filtering colloids, viruses, bacteria, and microorganisms in the aquaculture wastewater;

[0012] A reverse osmosis / nanofiltration system, connected to the ultrafiltration system, for desalinating, removing salt, antibiotics, and pesticides from the aquaculture wastewater;

[0013] Among them, the in-situ treatment equipment, photocatalytic disinfection device, ultrafiltration system, reverse osmosis / nanofiltration system are all connected to the aquaculture pond body through a return pipe, and the control system is also electrically connected to the in-situ treatment equipment, solid-liquid separation device, photocatalytic disinfection device, ultrafiltration system, reverse osmosis / nanofiltration system.

[0014] The beneficial effects of the above embodiments are: the in-situ treatment equipment, solid-liquid separation device, photocatalytic disinfection device, ultrafiltration system, reverse osmosis / nanofiltration system are integrated into the system, various pollutants in aquaculture wastewater can be treated, and process automation matching can be achieved through the online water quality monitoring system and control system. The operation is simple and near-zero discharge of aquaculture wastewater can be achieved through the design of the return water structure.

[0015] Based on the above embodiments, the embodiments of the present application may also be improved as follows:

[0016] In one of the embodiments of the present application: it also includes: a vacuum decompression drying device, which is connected to the solid-liquid separation device and the reverse osmosis / nanofiltration system respectively, and the vacuum decompression drying device is used to separate and dry the insoluble suspended matter.

[0017] In one of the embodiments of the present application: the in-situ treatment equipment adopts a self-cleaning filter, the solid-liquid separation device adopts a sedimentation centrifuge, and the photocatalytic disinfection device adopts a photocatalytic ultraviolet disinfection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 This is a structural diagram of an aquaculture wastewater treatment system.

[0020] Among them, 1 is an online water quality monitoring system, 2 is a control system, 3 is an in-situ treatment equipment, 4 is a solid-liquid separation device, 5 is a photocatalytic disinfection device, 6 is an ultrafiltration system, 7 is a reverse osmosis / nanofiltration system, 8 is an aquaculture pond, and 9 is a vacuum decompression drying device. DETAILED DESCRIPTION

[0021] In this application, unless otherwise clearly specified and limited, the terms in this application should be understood in a broad sense, such as connection can be fixed connection, detachable connection or integration, direct connection, or indirect connection through an intermediate medium; if it involves the electrical field, it can also be electrical connection or communication signal connection, etc. For ordinary technicians in this field, the specific meanings of different terms in this utility model can be understood according to specific circumstances, and the scope of the specific meaning should be limited to realizing the functions of this application.

[0022] A system for treating aquaculture wastewater, comprising: an online water quality monitoring system 1, a control system 2, an in-situ treatment device 3, a solid-liquid separation device 4, a photocatalytic disinfection device 5, an ultrafiltration system 6, and a reverse osmosis / nanofiltration system 7, wherein the online water quality monitoring system is used to detect the components of aquaculture wastewater in an aquaculture pond 8, the control system is connected to the online water quality monitoring system by electrical signals, the control system is used to receive data information transmitted by the online water quality monitoring system, the in-situ treatment device is connected to the aquaculture pond, the in-situ treatment device is used to filter impurities in the aquaculture wastewater, the solid-liquid separation device is connected to the in-situ treatment device, the solid-liquid separation device is used to separate solids from liquids in the aquaculture wastewater, and the photocatalytic disinfection device is used to separate solids from liquids in the aquaculture wastewater. The chemical disinfection device is connected to the in-situ treatment equipment and the solid-liquid separation device respectively, the photocatalytic disinfection device is used to decompose organic toxins, organic matter and ammonia nitrogen, the ultrafiltration system is connected to the in-situ treatment equipment, the ultrafiltration system is used to filter colloids, viruses, bacteria, and microorganisms in the aquaculture wastewater, the reverse osmosis / nanofiltration system is connected to the ultrafiltration system, and the reverse osmosis / nanofiltration system is used to desalinate, remove salt, remove antibiotics, and remove pesticides from the aquaculture wastewater; among them, the in-situ treatment equipment, the photocatalytic disinfection device, the ultrafiltration system, and the reverse osmosis / nanofiltration system are all connected to the aquaculture pond body through the return pipe, and the control system is also electrically connected to the in-situ treatment equipment, the solid-liquid separation device, the photocatalytic disinfection device, the ultrafiltration system, and the reverse osmosis / nanofiltration system.

[0023] In some embodiments of the present application, online water quality monitoring systems, control systems, in-situ treatment equipment, solid-liquid separation devices, photocatalytic disinfection devices, ultrafiltration systems, reverse osmosis / nanofiltration systems, and vacuum decompression drying devices are all products in the prior art.

[0024] In some embodiments of the present application, the aquaculture pond body may be aquaculture equipment such as aquaculture boxes and aquaculture ponds.

[0025] In some embodiments of the present application, the control system uses a device with control functions such as a computer or an industrial computer to detect the composition and value of pollutants in the aquaculture wastewater through an online water quality monitoring system. When the detected value reaches the set value required for the corresponding equipment or system to work, the corresponding device or system is turned on through the control system, thereby realizing online intelligent matching of the process, that is, intelligently selecting the treatment process and emergency process plan according to the customer's aquaculture type and the farm environment.

[0026] In some embodiments of the present application, the aquaculture wastewater treatment system also includes: a vacuum decompression drying device 9, which is respectively connected to the solid-liquid separation device and the reverse osmosis / nanofiltration system, and the vacuum decompression drying device is used to separate and dry insoluble suspended matter.

[0027] In some embodiments of the present application, the in-situ treatment equipment adopts a self-cleaning filter, the solid-liquid separation device adopts a sedimentation centrifuge, and the photocatalytic disinfection device adopts a photocatalytic ultraviolet disinfection device.

[0028] When the aquaculture wastewater treatment system is working, the aquaculture wastewater is tested through the online water quality monitoring system, and the test results are fed back to the control system. The control system forms an intelligent process pairing at the terminal according to the test data. For example, if it is detected that the suspended solids and organic matter exceed the standard, the in-situ treatment equipment, solid-liquid separation device and ultrafiltration system will be turned on; after the control system starts the corresponding equipment, the aquaculture wastewater is passed into the corresponding equipment for purification treatment, the solid waste generated by the vacuum decompression drying device is transported out for treatment, and the water resources generated by the in-situ treatment equipment, photocatalytic disinfection device, ultrafiltration system or reverse osmosis / nanofiltration system are returned to the aquaculture pond for recycling, so as to achieve near-zero discharge of wastewater.

[0029] The above are only embodiments of the utility model. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. An aquaculture wastewater treatment system, characterized in that: include: The water quality online monitoring system is used to detect the composition of aquaculture wastewater in aquaculture ponds; A control system, connected to the water quality online monitoring system by electrical signals, for receiving data information transmitted by the water quality online monitoring system; An in-situ treatment device, connected to the aquaculture pond, for filtering impurities in the aquaculture wastewater; A solid-liquid separation device, connected to the in-situ treatment equipment, for separating solids from liquids in the aquaculture wastewater; A photocatalytic disinfection device, which is connected to the in-situ treatment equipment and the solid-liquid separation device, respectively, and is used to decompose organic toxins, organic matter and ammonia nitrogen; An ultrafiltration system, connected to the in-situ treatment equipment, for filtering colloids, viruses, bacteria, and microorganisms in the aquaculture wastewater; A reverse osmosis / nanofiltration system, connected to the ultrafiltration system, for desalinating, removing salt, antibiotics, and pesticides from the aquaculture wastewater; Among them, the in-situ treatment equipment, photocatalytic disinfection device, ultrafiltration system, reverse osmosis / nanofiltration system are all connected to the aquaculture pond body through a return pipe, and the control system is also electrically connected to the in-situ treatment equipment, solid-liquid separation device, photocatalytic disinfection device, ultrafiltration system, reverse osmosis / nanofiltration system.

2. The aquaculture wastewater treatment system according to claim 1, characterized in that: Also includes: The vacuum decompression drying device is connected to the solid-liquid separation device and the reverse osmosis / nanofiltration system respectively, and the vacuum decompression drying device is used to separate and dry insoluble suspended matter.

3. The aquaculture wastewater treatment system according to claim 2, characterized in that: The in-situ treatment equipment adopts a self-cleaning filter, the solid-liquid separation device adopts a sedimentation centrifuge, and the photocatalytic disinfection device adopts a photocatalytic ultraviolet disinfection device.

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