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Modified red earth flocculant and method for preparing same

A flocculant, red soil technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of expensive flocculant, secondary pollution, toxicity, etc., to achieve non-toxic products, low dosage and low cost. Effect

Inactive Publication Date: 2015-04-01
YUXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a modified red soil flocculant and its preparation method for the existing flocculants which are expensive, difficult to degrade, toxic, and cause secondary pollution after use. The technical scheme is as follows:

Method used

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Examples

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Effect test

Embodiment 1

[0024] A modified red soil flocculant, which is composed of the following ratios of raw materials: 100 kg of red soil, 5 L of concentrated hydrochloric acid, and 25 L of tap water.

[0025] The preparation method of this flocculant is:

[0026] (a) Preparation of dilute acid: Measure 5L of 37% concentrated hydrochloric acid with a graduated cylinder, and 25L of tap water with a graduated cylinder. The pH value of the tap water is 6.34. Slowly mix the measured acid and tap water in the container, and stir evenly A dilute acid solution is obtained;

[0027] (b) Prepare red soil: select red soil, dry the selected red soil naturally, grind the dried red soil and pass through a 40-mesh sieve, weigh 100Kg of the red soil under the sieve, the main physical and chemical properties of the red soil are PH5.32, iron content 60.5g / kg, aluminum content 10.37g / kg, organic matter content 6.32 g / kg;

[0028] (c) Acid-soil mixing: put the weighed red soil into a container filled with a dilut...

Embodiment 2

[0036] A modified red soil flocculant is composed of raw materials in the following proportions: 100kg of red soil, 10L of glacial acetic acid, and 20L of tap water.

[0037] The preparation method of this flocculant is:

[0038] (a) Preparation of dilute acid: Measure 10L of 99.5% glacial acetic acid with a graduated cylinder, and 20L of tap water with a graduated cylinder. The pH value of the tap water is 6.34. Slowly mix the measured acid and tap water in the container, and stir evenly A dilute acid solution is obtained;

[0039] (b) Prepare red soil: select red soil, dry the selected red soil naturally, grind the dried red soil and pass through a 60-mesh sieve, weigh 100Kg of the red soil under the sieve, the main physical and chemical properties of the red soil are PH5.32, iron content 60.5g / kg, aluminum content 10.37g / kg, organic matter content 6.32 g / kg;

[0040] (c) Acid-soil mixing: put the weighed red soil into a container filled with a dilute acid solution, mix th...

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Abstract

The invention discloses a modified red earth flocculant and a method for preparing the same. Raw materials comprise red earth, acids and tap water. The method comprises the steps: firstly, the acids and the water are mixed to form a dilute acid according to a ratio; then the dilute acid and the red earth are mixed so as to obtain an acid and earth mixture; and the acid and earth mixture is dried, grinded and sieved, and the obtained undersize product is the modified red earth flocculant. The raw materials which are used according to the method disclosed by the invention are extensive, the production process is simple, the cost is low, and the product is non-toxic and does not generate secondary pollution. When the flocculant is used for treating sludge, the input of the flocculant is less, the settlement speed of the sludge is fast, and the moisture content of treated sludge is low. The flocculant also has a relatively good phosphorus removal effect, and is economical, practical and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and relates to a modified red soil flocculant for flocculating and precipitating sludge in the sewage treatment process and a preparation method thereof. Background technique [0002] In the process of sewage treatment, the residual sludge produced after water treatment has a high water content, the water content is close to 98%, and the volume is relatively large. During the mud treatment process, high-performance flocculants must be added to treat it to speed up its settling rate, reduce the moisture content of the sludge, and reduce the volume of the sludge. [0003] At present, the commonly used flocculants added in sludge treatment include: organic polymer flocculant polyacrylamide (PAM); inorganic flocculant polyaluminum (PAC) and polyiron (PFS); natural polymer flocculant chitosan and improved Starch; Composite flocculant, etc. [0004] Organic polymer flocculant has the advantages o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/54
Inventor 高小茵马俊李春杨善勇徐帮富赵敏慧
Owner YUXI NORMAL UNIV
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