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Ultrasonic deep algae removal device and method

An ultrasonic and deep technology, applied in the field of water treatment, can solve problems such as water quality and safety issues, and achieve continuous treatment and more humanized management

Inactive Publication Date: 2017-11-21
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional air flotation technology is widely used in my country to treat algae in the raw water of waterworks. However, due to the limitation of traditional air flotation equipment, the diameter of the bubbles generated during the air flotation process is relatively large (80-100μm), which makes it difficult to The effect of removing algae under the premise of adding coagulant (Ye Jianfeng. A micro-flotation algae removal device and its method for small water bodies: China, ZL201310299604.6[P].2013-09-25.), If the coagulant is added, it may cause water quality safety problems
Therefore, it is necessary to find a method for advanced treatment of water samples after air flotation, in order to achieve a high removal rate and prevent the release of harmful substances (cell contents, etc.) from the algae cell rupture and cause water quality safety problems, so as to better meet water demand

Method used

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  • Ultrasonic deep algae removal device and method
  • Ultrasonic deep algae removal device and method
  • Ultrasonic deep algae removal device and method

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Embodiment 1

[0027] The water bloom Microcystis collected in Meiliang Bay of Taihu Lake in summer (more than 90% of the phytoplankton belong to the genus Microcystis), and the raw water of Taihu Lake filtered with a 0.45 μm filter membrane was reconstituted into a low algae cell density (OD680 of 0.2) The suspension is the experimental algae species, and the algae removal effect experiment is carried out in the laboratory.

[0028] (1) Take 200mL of the above-mentioned algae suspension and place it in a 400mL beaker, sonicate for 5, 10, 30, 60 and 300s. Blank control group. Then the algae samples were evenly transferred to four colorimetric tubes, and placed in a biological incubator for static culture. The culture light intensity is 30 μmol (photons) m -2 the s -1 , the temperature is 25°C, and the light-to-dark ratio is 12h:12h. Three parallels were set for each of the above treatments, and the average value was taken. The chlorophyll a content of the algae suspension after being cu...

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Abstract

The invention discloses a device which comprises an air floatation tank, an algae removal pipeline and a plurality of algae settling tanks connected in parallel, wherein the air floatation tank, the algae removal pipeline and the algae settling tanks are sequentially connected. Ultrasonic probes are arranged inside the algae removal pipeline, a mud scraper, a dump tank and a drain valve are arranged at the bottom of each algae settling tank, and water inlet valves are arranged between the air floatation tank and the algae removal pipeline and between the algae removal pipeline and each algae settling tank. The invention further provides a method for removing algae by the device. A water sample treated by an air floatation method is subjected to deep treatment, residual algae in water can be efficiently removed, water use requirements are met, substances such as algal toxin harmful to human bodies cannot be released due to algae cell rupture in the algae removal process, the whole device is automatically controlled by a PLC (programmable logic controller), maintenance of the ultrasonic probes can be facilitated by the layout mode of the ultrasonic probes inside the pipeline, and management of the whole device is more humanized.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an ultrasonic deep algae removal device and method. Background technique [0002] Large-scale Microcystis blooms are one of the major water environmental problems facing my country. Microcystis blooms not only affect the water body landscape, but also cause serious damage to the ecological environment of the water area, and may also produce algal toxins; if they occur in the water body of the water source, it may seriously endanger the operation of the water plant and the safety of drinking water. [0003] At present, common algae removal methods at home and abroad include physical methods (mechanical algae removal method, manual salvage, dredging method for water exchange, etc., these methods are not only costly but also low in efficiency), chemical methods (mainly adding sodium hypochlorite, copper sulfate Such as chemical agents and flocculants, this metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/36C02F1/24
CPCC02F1/24C02F1/36
Inventor 谭啸戴凯文段志鹏刘倩倩舒筱倩顾惠卉
Owner HOHAI UNIV
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