High-efficiency coagulation algae removal method for algae-containing raw water

A raw water and coagulation technology, applied in the field of water treatment, can solve problems such as poor coagulation and algae removal effect

Inactive Publication Date: 2019-09-10
茂名市水务投资集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the poor effect of coagulation and algae removal in the conventional drinking water treatment process

Method used

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  • High-efficiency coagulation algae removal method for algae-containing raw water
  • High-efficiency coagulation algae removal method for algae-containing raw water
  • High-efficiency coagulation algae removal method for algae-containing raw water

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Experimental program
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Embodiment

[0019] A kind of chitosan (CTS) and polyaluminum chloride (PAC) combine the method for efficient coagulation algae removal, comprise the following steps:

[0020] (1) The molecular weight of chitosan is 700,000-800,000, the viscosity is 60mpa·s, and the degree of deacetylation is ≥90.0% (the manufacturer is Shanghai Lanji Biological Co., Ltd.). Weigh 50mg of CTS and dissolve it in 5mL of 0.1mol / L hydrochloric acid solution. Stir on a magnetic stirrer for 30 minutes until completely dissolved, and dilute with deionized water to obtain a 0.05 g / L stock solution. Polyaluminum chloride is a first-class product of drinking water, and the concentration of the stock solution is 0.25g / L. Mix chitosan and polyaluminum chloride stock solution evenly before adding.

[0021] (2) Microcystis aeruginosa (FACHB-909) and Anabaena blooms (FACHB-245) were obtained from the Freshwater Algae Species Bank of the Chinese Academy of Sciences. In order to simulate the water quality of algal blooms ...

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Abstract

The invention discloses a high-efficiency coagulation algae removal method for algae-containing raw water, which is carried out according to the following steps: (1) preparing chitosan and polyaluminum chloride reserve solutions: 50 mg of chitosan is dissolved in 5 mL of 0.1 mol/L hydrochloric acid solution, stirring is carried out until chitosan is completely dissolved, and dilution is carried out with deionized water to obtain a 0.05 g/L chitosan reserve solution, and polyaluminum chloride is diluted with deionized water to obtain a 0.25 g/L polyaluminum chloride reserve solution; (2) completely mixing the chitosan reserve solution and the polyaluminum chloride reserve solution according to the required dosage; and (3) carrying out coagulation according to the following method: 1) 200r/min quick agitation is carried out for 10s to mix the algae-containing raw water uniformly; 2) 200 r/min quick agitation is carried out for 1 min after a coagulant is added; 3) 60 r/min medium-speed agitation is carried out for 10 min; 4) 30 r/min slow agitation is carried out for 15 min; and 5) the agitated solution is allowed to stand for 30 min. The method can realize high-efficiency and safe coagulation algae removal by combining chitosan and polyaluminum chloride for use , the algae removal effect is good, the effect is quick, the operation is simple and the application value is high.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a high-efficiency coagulation and algae removal method for raw water containing algae. Background technique [0002] The outbreak of algae in drinking water sources not only affects the normal operation of the drinking water treatment system, but also threatens the water safety of the general public. When algae proliferate in large quantities, different from general turbidity-causing substances, algae cells have low zeta potential, low density, and stable colloids, and algae organic matter is easy to undergo complexation reaction with coagulant, which affects the formation of flocs during coagulation. Increased the difficulty of water treatment. Researchers often use methods such as pre-oxidation, pre-ultrasound, and pre-pressure to strengthen coagulation to remove algae, but these methods have problems such as the release of algal toxins, the generation of disinfectio...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/52
CPCC02F1/5236C02F1/5263C02F1/56
Inventor 周锡文杨学强梁韩英潘伟斌
Owner 茂名市水务投资集团有限公司
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