CN203187454U

CN203187454U - Biological filtering tank

Info

Publication number: CN203187454U
Application number: CN2013201572850U
Authority: CN
Inventors: 罗国芝; 姚陈; 谭洪新; 朱浩; 刘文畅; 李文清; 邓棚文
Original assignee: Shanghai Maritime University
Current assignee: Shanghai Maritime University; Shanghai Ocean University
Priority date: 2013-04-01
Filing date: 2013-04-01
Publication date: 2013-09-11
Anticipated expiration: 2023-04-01

Abstract

The utility model discloses a biological filtering tank, and relates to a water quality treatment device in a recirculating aquaculture system. According to the utility model, a filtering tank and a filtering material are adopted. The biological filtering tank is characterized in that the filtering tank is internally provided with two baffle plates which separate the filtering tank into a first unit, a second unit and a third unit; the volumes of the first unit and the second unit are respectively 1.2m<3>, and the volume of the third unit is 0.45m<3>; the first unit and the second unit are internally filled with the filtering material; the upper part of the first unit is connected with a water inlet of a water outlet pipe of a solid-liquid separator, and the middle and lower parts of the two baffle plates are both provided with filtering holes; aeration holes and aeration stones of an air inflating pipe are distributed and connected to the bottoms of tanks of the first unit and the second unit; the lower part of the third unit is provided with a water outlet pipe connectd with a dropping-filtering-type microbead biological filter; the upper part of the third unit is provided with an overflow pipe which is connected with the dropping-filtering-type microbead biological filter; the upper part of the first unit is also provided with a water intake pipe; the upper part of the third unit is also provided with an overflow port containing the overflow pipe of the dropping-filtering-type microbead biological filter. The biological filtering tank provided by the utility model is used for water quality purification treatment in the aquaculture system.

Description

A kind of biological filter

Technical field

The utility model relates to the treatment device for water in the circulating water culture system.

Background technology

In the operational process of circulating water culture system, because the metabolism of fish and the accumulation of residual bait can cause water quality to be ruined, growing up healthy and sound of object cultured in influence.Conventional solid-liquid separation is filtered the solid pollutant that can remove effectively in the aquaculture water, but a large amount of inorganic nitrogens (mainly is: ammonia-state nitrogen (NH ₄ ⁺-N), nitrite nitrogen (NO ₂ ^--N), nitric nitrogen (NO ₃ ^--N)) be dissolved in the growth that influences fish in the aquaculture water.Molecular nitrogen (NH wherein ₃), fish there is very strong toxicity, even concentration is very low, also can suppress its growth, can cause fish kills when serious, one of approach of solution is the nitrification by microorganism, and ammonia-state nitrogen is converted into nitric nitrogen, reduces culturing the harm of object.Types of biological strainers such as existing immersion, a filter formula can transform ammonia nitrogen, but it is low to handle load.Their inner stuffing is placed in the container of a sealing, forms a static filter bed.Current from top to bottom (or from bottom to top) through out-of-date, ammonia nitrogen is transformed by the microbial film bacterial flora of filling surface, simultaneously the part suspended substance is removed by the static depth filtration, deep bed filtration of this layer.But after the suspended substance that is accumulated when the space between filtrate took, strainer needed back flushing to remove suspended substance.This mode has many head loss, easily stop up and cause the current short circuit, and processing is loaded and processing efficiency is not high.

Summary of the invention

The purpose of this utility model is to provide a kind of nitrification effect good, and it is high to handle load, does not need back flushing, the simple to operate and low biological filter of consuming energy.

The utility model adopts filter tank, filtrate, it is characterized in that establishing in the filter tank twice dividing plate filter tank is divided into first module, Unit second and Unit the 3rd, and the volume of first module, Unit second respectively is 1.2m ³, the volume of Unit the 3rd is 0.45 m ³Fill filtrate in first module and the Unit second; The water-in of admitting the solid-liquid separating machine rising pipe is arranged at first module top, all is provided with filter opening in the middle and lower part of twice dividing plate; Distribute at the bottom of first module and second unit cells and be connected solarization air cap and the aeration stone of gas-filled valve; Bottom, Unit the 3rd has and drips the filter rising pipe that the pearl biofilter is connected that declines; There is upflow tube on top, Unit the 3rd and drips the filter pearl biofilter that declines and is connected; First module top also is provided with water inlet pipe; Top, Unit the 3rd also is provided with to admit drips the overflow port of filtering the pearl biofilter upflow tube that declines.

The utility model is divided into three unit with the filter tank increases hydraulic detention time, guarantees that water body can reduce the cost that breeding wastewater is handled effectively by microbiological treatment, avoids stopping up and reducing head loss.Equipment does not need back flushing, and is easy and simple to handle, improved water treatment efficiency.

Description of drawings

Fig. 1 is the synoptic diagram of biological filter of the present utility model.

Embodiment

Establish the twice dividing plate in the utility model (referring to accompanying drawing) filter tank the filter tank is divided into first module 10, second unit 11 and the 3rd unit 12, the volume of first module, Unit second respectively is 1.2m ³, the volume of Unit the 3rd is 0.45 m ³All fill the filtrate 3 for the microorganism species apposition growth in first module and the Unit second; The water-in 2 of admitting the solid-liquid separating machine rising pipe is arranged at the first module top in filter tank, breeding wastewater flows in the filter tank by water-in, middle and lower part at the twice dividing plate all is provided with filter opening 4,5, and water flows into next unit by the filter opening on the dividing plate, flows into the 3rd unit at last; Distributing at the bottom of first module and second unit cells is connected solarization air cap and the aeration stone of gas-filled valve 6, and under the effect of gas blower, filtrate and water are complete admixture in the pond, utilizes the microorganism that grows on the filtrate to handle ammonia nitrogen in the water body; Bottom, Unit the 3rd has and drips the filter rising pipe 7 that the pearl biofilter is connected that declines, the water of handling through the filter tank is driven into by the recycle pump that links to each other with rising pipe to drip to filter in the pearl biofilter that declines and further processes, when system need safeguard, can be by the water in the rising pipe 7 eliminating ponds; There is upflow tube 8 on the top, Unit the 3rd in filter tank and drips the filter pearl biofilter that declines and is connected, and upflow tube can be got rid of water unnecessary in the filter tank; The first module top in filter tank also is provided with water inlet pipe 1, when the water yield in the filter tank is very few, opens water inlet pipe, can replenish the water yield in the filter tank, and the assurance filter tank is normally moved; The top, Unit the 3rd in filter tank also is provided with to admit drips the overflow port 9 of filtering the pearl biofilter upflow tube that declines, can the unnecessary water yield be entered in the filter tank by overflow port when filter declines pearl biofilter water excess when dripping, and avoids system to break down.

Claims

1. filter tank, filtrate are adopted in a biological filter, it is characterized in that establishing in the filter tank twice dividing plate filter tank is divided into first module, Unit second and Unit the 3rd, and the volume of first module, Unit second respectively is 1.2m ³, the volume of Unit the 3rd is 0.45 m ³Fill filtrate in first module and the Unit second; The water-in of admitting the solid-liquid separating machine rising pipe is arranged at first module top, all is provided with filter opening in the middle and lower part of twice dividing plate; Distribute at the bottom of first module and second unit cells and be connected solarization air cap and the aeration stone of gas-filled valve; Bottom, Unit the 3rd has and drips the filter rising pipe that the pearl biofilter is connected that declines; There is upflow tube on top, Unit the 3rd and drips the filter pearl biofilter that declines and is connected; First module top also is provided with water inlet pipe; Top, Unit the 3rd also is provided with to admit drips the overflow port of filtering the pearl biofilter upflow tube that declines.