Sludge curing agent and application thereof

A curing agent and sludge technology, which is applied in sludge treatment, fixed/solidified sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of landfill engineering geological disasters, high pollutant content and high treatment costs , to achieve the effect of reducing stacking area, reducing pollution and reducing moisture content

Active Publication Date: 2018-02-09
武汉鹏森环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high water content of sewage sludge and the high content of pollutants and complex components, the existing treatment methods generally have environmental pollution, high treatment costs, and long treatment time. At the same time, they are also likely to cause problems such as landfill engineering geological disasters.

Method used

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  • Sludge curing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A sewage sludge curing agent comprises the following raw materials in weight percentage: 35.4% of silicon-aluminum-iron-calcium oxide; 28.3% of calcium oxide; 21.3% of special cement; 14.2% of polyacrylamide;

[0039] Wherein, the silicon-aluminum-iron-calcium oxide is formed by mixing fly ash and fine coal slag at a mass ratio of 1:1.

[0040] The particle size of the polyacrylamide is 0.6-1mm, the particle size of the silicon-aluminum-iron-calcium oxide is ≤1mm, and the specific surface area of ​​the special cement is ≧350m 2 / kg.

[0041] The application of the sludge solidifying agent comprises the following steps: adding 14.1% by mass percentage of the sludge solidifying agent to the water-containing sludge and stirring evenly; extruding with a plate and frame filter press under a pressure of 30 MPa to realize solid-liquid separation.

Embodiment 2

[0043] A kind of sewage sludge curing agent and application thereof, compared with Example 1, the difference is that the addition ratio of the sewage sludge curing agent accounts for 11% of the total weight of the water-containing sludge, and the silicon-aluminum-iron-calcium oxide is powder Coal ash and fine coal cinder are mixed in a mass ratio of 1:1.5.

Embodiment 3

[0045] A kind of sewage sludge curing agent and application thereof, compared with Example 1, the difference is that the addition ratio of the sewage sludge curing agent accounts for 20% of the total weight of the water-containing sludge, and the silicon-aluminum-iron-calcium oxide is coal gangue.

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Abstract

The invention discloses a sludge curing agent and application thereof. The sludge curing agent is suitable for curing treatment on high-water-content sludge in town sewage treatment plants, rivers andlakes. The sludge curing agent comprises the following raw materials in percentage by weight: 26 to 44 percent of silicon aluminum iron calcium oxide, 19 to 37 percent of calcium oxide, 13 to 30 percent of special cement, 5 to 25 percent of polyacrylamide and 0.2 to 3 percent of chitosan. The sludge curing agent realizes sludge curing and stabilization through the chemical property of the industrial waste and the mutual activity excitation; the water content of the sludge is effectively reduced, the early-stage compressive strength and the flexural strength of the sludge are improved, and mechanical operation during backfilling is facilitated; heavy metal in the sludge is adsorbed by the chitosan, organic matters are degraded, the pathogene is deactivated, pollution is reduced and stink can be eliminated; and the sludge curing agent is low in price and simple in curing process, and the cured sludge does not cause secondary pollution.

Description

technical field [0001] The invention relates to a chemical solidifying agent for sewage sludge, in particular to a solidification method and application for drainage sewage sludge of urban sewage treatment plants and river and lake sewage sludge. Background technique [0002] Sludge is a viscous substance produced in the process of sewage treatment. It is mainly composed of aerobic and anaerobic microorganisms. It is a complex mixture of organic matter, metals, germs, insect eggs, colloids, etc. For large urban sewage treatment plants and rivers and lakes in cities, due to the large amount of industrial wastewater discharged into the system, the sewage sludge contains a large number of microorganisms, pathogens, heavy metals and organic pollutants, and the water content is generally 80%. Above, if not handled properly, it will cause serious secondary pollution. [0003] China CN201510779534.3 patent application for a dewatered sludge solidifying agent, preparation method a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/14
CPCC02F11/008C02F11/14C02F2303/02
Inventor 杨珈乐王景芸
Owner 武汉鹏森环境科技有限公司
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