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Electric flocculation device for separation and collection of industrial air-assisted microalgae water

A technology of algal water separation and electrocoagulation, applied in water/sewage treatment, chemical instruments and methods, flotation water/sewage treatment, etc., can solve problems such as low efficiency, high energy consumption, instability, etc., and achieve enhanced mass transfer , increase the electrode surface area, improve the effect of electrocoagulation efficiency

Active Publication Date: 2013-04-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide an electrocoagulation device for gas-assisted algae water separation and collection, so as to overcome the defects of low efficiency, high energy consumption and instability of current microalgae electrocoagulation equipment

Method used

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  • Electric flocculation device for separation and collection of industrial air-assisted microalgae water
  • Electric flocculation device for separation and collection of industrial air-assisted microalgae water
  • Electric flocculation device for separation and collection of industrial air-assisted microalgae water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: Algae hydroelectric flocculation separation and air flotation collection of microalgae in chlorella culture solution

[0052] This embodiment adopts the following device: the device includes a tower body 10, a main shaft 1, a side connecting rod 5, a turntable electrode plate 8, an annular electrode plate 9, a gas distributor 12 and an air supply device 14; plate 8, the same pole annular electrode plate 9 fixed to the side connecting rod 5 adjacent to the inner wall of the tower is alternately distributed, the main shaft 1 and the turntable electrode plate 8 can rotate under the drive of the motor; the main shaft 1 and the side connecting rod 5 pass through copper The wire 18 is connected to the positive and negative poles of the DC power supply 19; the gas distributor 12 is arranged under the concentric cylinder at the lower part of the tower body 10, and is connected to the bottom of the main shaft 1; gas; the side of the upper enlarged section 3 of the tow...

Embodiment 2

[0054] Example 2: Separation of algae by hydroelectric flocculation of algae in spirulina culture solution Hydroelectric flocculation separation of algae

[0055] The device used in this embodiment is the same as in Embodiment 1.

[0056] The experimental process is as follows: the culture solution containing spirulina enters from the feed liquid inlet 17, and the turntable electrode plate 8 fixedly connected to the main shaft 1 is driven by external power, relative to the annular electrode plate 9 fixedly connected to the side connecting rod 5. Rotating motion; after electrification, the spirulina in the feed liquid produces flocculation, agglomeration and sedimentation under the action of the electric field; the air supply device 14 sends air through the gas distributor 12 at the lower part of the tower body 10 to generate air bubbles; the rising bubble surface absorbs the flocculated spirulina and carries the spirulina The algae moves to the top of the tower body 10; the re...

Embodiment 3

[0057] Example 3: Separation of algal hydroelectric flocculation and air flotation collection of cyanobacteria in Kunming Dianchi Lake

[0058] The device used in this embodiment is the same as in Embodiment 1.

[0059] The experiment process is as follows: Dianchi Lake water containing cyanobacteria enters from the feed liquid inlet 17, and the rotating disk electrode plate 8 fixedly connected to the main shaft 1 is driven by external power relative to the annular electrode plate 9 fixedly connected to the side connecting rod 5. Rotational movement; after electrification, the cyanobacteria in the water produce flocculation, agglomeration and settlement under the action of the electric field; the air supply device 14 supplies air through the gas distributor 12 at the lower part of the tower body 10 to generate air bubbles; Movement; the reunited cyanobacteria are brought to the liquid surface at the upper part of the tower body 10 by the air bubbles; the liquid level at the up...

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Abstract

The invention relates to an electric flocculation device for the separation and collection of industrial air-assisted microalgae water, and a use method thereof. The device comprises a tower body, a main shaft, a lateral connecting rod, rotary table type electrode plates, ring-shaped electrode plates, a gas distributor, a gas feed device and auxiliary equipment, wherein the same-electrode rotary table type electrode plates fixed on the main shaft and the same-electrode ring-shaped electrode plates fixed on the lateral connecting rod on side of the tower body are distributed in a staggered manner; the main shaft and the rotary table type electrode plates rotate under the action of a mechanical rotation device; and the main shaft and the lateral connecting rod are mode of conductive metal and are respectively connected with the two poles of a direct-current power supply. According to the invention, as the pole plates have large superficial areas, the electric flocculation efficiency is high; a sieve plate is in a rotating state so as to effectively avoid adsorption precipitation of the microalgae on the surfaces of the electrodes; and the liquid in the tower body flows in the direction opposite to the precipitation direction of the microalgae, forming a cross flow which increases mass transfer and improves the electric flocculation efficiency. Therefore, the device is suitable for large scale industrial production.

Description

technical field [0001] The invention relates to an electric flocculation device for microalgae, in particular to an electric flocculation device and method for industrial gas-assisted algae water separation and collection. Background technique [0002] From the perspective of bioenergy applications, microalgae cultivation has been widely used in the fields of mariculture, food, pharmaceuticals, and energy. However, the separation and collection of microalgae has become one of the main factors restricting the large-scale expansion of microalgae cultivation. From the perspective of environmental protection, with the acceleration of urbanization and industrial development, the nutrients of ammonia, nitrogen and phosphorus in water bodies are increasing continuously. In lake water bodies, microbial algae such as blue-green algae multiply explosively in large areas, and discharge toxic metabolites into water bodies. The ecological environment and human production and life are adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/463C02F1/24
Inventor 杨良嵘邢慧芳王丽李昊剑刘会洲
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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