Method for effectively removing residual aluminum in water by adopting flocculation process

A technology for removing water and residual aluminum, applied in the field of water treatment, can solve the problems of high cost and large addition amount, and achieve the effect of reducing the amount of use and improving the flocculation efficiency

Inactive Publication Date: 2012-02-15
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to find a safe flocculant, the application of microbial flocculants in water treatment is currently the most researched at home and abroad. Although microbial flocculants have th

Method used

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  • Method for effectively removing residual aluminum in water by adopting flocculation process
  • Method for effectively removing residual aluminum in water by adopting flocculation process

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for effectively removing residual aluminum in water by using a flocculation process, using a flocculation process with an aluminum-based flocculant as the main flocculant and a microbial flocculant as an auxiliary agent, comprising the following steps:

[0028] 1) Select aluminum-based flocculant polyaluminum chloride (PAC) as the main flocculant, and add polyaluminum chloride to the treated water at an amount of 50mg / L;

[0029] 2) Add the prepared microbial flocculant in the above-mentioned treated water, the addition amount is 15mg / L;

[0030] 3) The treated water after adding polyaluminium chloride and microbial flocculant was stirred rapidly at a stirring speed of 300rpm for 2 minutes, then the stirring speed was reduced to 50rpm, and then stirred at a slow speed for 20 minutes, and after standing still for 20 minutes, the supernatant was discharged. Can.

[0031] The test results show that the clarity in the supernatant is good, and the residual aluminum...

Embodiment 2

[0033] A method for effectively removing residual aluminum in water by using a flocculation process, using a flocculation process with an aluminum-based flocculant as the main flocculant and a microbial flocculant as an auxiliary agent, comprising the following steps:

[0034] 1) Select the aluminum-based flocculant polyaluminum chloride (PAC) as the main flocculant, and add polyaluminum chloride to the treated water at an amount of 80mg / L;

[0035] 2) Add the prepared microbial flocculant in the above-mentioned treated water, the addition amount is 6mg / L;

[0036] 3) The treated water after adding polyaluminum chloride and microbial flocculant was stirred rapidly at a stirring speed of 400rpm for 1min, then the stirring speed was reduced to 60rpm, and then stirred at a slow speed for 10min, and after standing still for 30min, the supernatant was discharged. Can.

[0037] The test results show that: the clarity in the supernatant is good, and the residual aluminum can be as l...

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Abstract

The invention relates to a method for effectively removing residual aluminum in water by adopting a flocculation process, which adopts the flocculation process by using aluminum series flocculating agents as main flocculating agents and microorganism flocculating agents as auxiliary agents and comprises the following steps of: 1) selecting aluminum series flocculating agent polyaluminium chloride (PAC) as the main flocculating agents; 2) selecting microorganism flocculating agent soy aspergillus sojae strains as the auxiliary agents; and 3) adding the PAC and the microorganism flocculating agents into water to be treated, respectively carrying out fast stirring and slow stirring, and discharging supernatant fluid after stillness. The method has the advantages that the chemical flocculating agent and microorganism flocculating agent compounding treatment method is adopted, the problem of secondary pollution caused by the application of the PAC in the prior art is solved, the consumption of the PAC is reduced, the flocculation efficiency is improved, the effect of effectively removing the residual aluminum is reached through the bonding of the microorganism flocculating agents and the PAC and the immeshing effect of the microorganism flocculating agents, and the method belongs to an economic and efficient flocculation method of removing the residual aluminum in the water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for effectively removing residual aluminum in water by adopting a flocculation process. Background technique [0002] Water is the origin of life, an indispensable substance for the survival of human beings and organisms, and an important condition for industrial development. With the rapid economic development and population growth, my country's annual water consumption and sewage discharge are also increasing, and the problems of water supply and sewage treatment are becoming increasingly severe. The development and engineering application of water treatment technology has become a necessary part of maintaining the sustainable development of society and economy. [0003] Flocculation technology is currently the main method used in water supply and wastewater treatment. In the history of flocculation technology development, chemical flocculant is t...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 王兰唐静
Owner NANKAI UNIV
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