Diameter-increasing filtering device and method for suspended solids in mariculture

Abstract

The invention belongs to the field of aquaculture engineering, and particularly relates to a diameter-increasing filtering device and method for suspended solids in mariculture. The device comprises an electronic controller, and an electric flocculation reactor, a coagulation stabilizer and a micro-filter which are connected with the electronic controller. The electric flocculation reactor is provided with an electric flocculation reactor water inlet and a water outlet pipeline, and the water outlet pipeline of the electric flocculation reactor is connected into the coagulation stabilizer and used for conducting diameter increasing treatment on the suspended solids of the culture water body; one side of the coagulation stabilizer is connected with an electric flocculation reaction system, and the other side of the coagulation stabilizer is provided with a pipeline connected into a microfiltration control system, so that the suspended solids in the culture water body are subjected to aeration treatment; the micro-filter is used for physically filtering the suspended solids in the culture water body; and the electronic controller is used for controlling the coagulation stabilizer to work so as to realize aeration treatment of suspended solids in the culture water body. The particle size of the suspended solids is increased through an electric flocculation technology, and the removal efficiency of the suspended solids in the culture water body can be improved under the condition that the filtering pore diameter of original filtering equipment is not changed.

Description

technical field [0001] The invention belongs to the field of aquaculture engineering, in particular to a diameter-increasing filtering device and method for suspended matter in seawater aquaculture. Background technique [0002] In the process of recirculating aquaculture, a large amount of residual bait and feces will be produced, which are mainly removed by physical filtration. At present, the common physical filtration equipment in the circulating aquaculture system mainly includes microfilters, high-speed filter sand tanks, curved screens, precision filters, etc. Among them, the drum microfilter has strong processing capacity, small footprint, and adaptability. Strong, small head loss and other advantages are favored. As the first step in the water treatment process of the recirculating aquaculture system, physical filtration determines the scale and energy consumption of subsequent water treatment units. The smaller the filter pore size of the drum microfilter, the hi...

AI Technical Summary

Problems solved by technology

The Chinese utility model patent with the patent number CN210481103U published on May 8, 2020 discloses a wastewater purification treatment system based on electrocoagulation technology; after electrocoagulation treatment, the sewage of this device is solidified by inclined plate precipitation method. Liquid-liquid separation, although the effect of solid-liquid separation in water is good, but there are problems such as uneven distribution of incoming and outgoing water and easy storage of dirt.

The Chinese utility model patent with the patent number CN210683305U published on June 5, 2020 discloses an industrial wastewater treatment equipment using electrocoagulation; in this device, the sewage is naturally settled in the equipment after being treated by electrocoagulation equipment To achieve solid-liquid separation, there is no mixing device inside which reduces the flocculation efficiency, the buffer capacity is relatively weak, and the water treatment capacity is small, so it is not suitable for industrial circulating aquaculture systems

The Chinese invention patent with the patent number CN111392927A published on July 10, 2020 discloses a domestic wastewater treatment method based on electrocoagulation and its device; Flat ceramic membrane filtration, after disinfection, use precision filter to filter; this device can treat domestic sewage well, but it adopts intermittent treatment and the continuity is not strong, so it is not suitable for industrialized circulating aquaculture with continuous water circulation

In addition, the output current of the electrocoagulation reactor in the above patent cannot be adjusted according to the amount of pollutants in the actual sewage during operation, which may easily cause unnecessary power loss

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