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A method of coupling high-aluminum iron sludge and industrial waste in water plants to treat landfill leachate

A technology of landfill leachate and industrial waste, applied in the field of waste reuse, can solve the problems of difficult to achieve material balance, production waste gas, high content of humic acid and sulfur ions, non-removable and other problems, and reduce waste increment , reduce expensive costs, and increase the separation speed

Active Publication Date: 2022-07-12
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 2. The content of humic acid and sulfur ions in the leachate is high, which requires a large amount of aluminum and iron flocculants to remove, resulting in higher costs
[0015] Obviously, the ability of gypsum and high-iron minerals to remove humic acid and hydrogen sulfide is easy to be known in the industry, but it is difficult to understand simply when it is coupled with the second step of treatment and the division of labor removes different types of pollutants. Even if it is associated, it is difficult to realize The balance of materials and the overall solution of production waste gas
In this way, low-cost deodorization and safety issues during deodorization can be solved, thus forming a substantive breakthrough process route in a non-detachable and integral manner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Use red pyrite slag (specific surface area greater than 1 square meter / g), gypsum mold fragments, and hemihydrate gypsum to be mixed at 1:2:1 by weight, and then squeezed into granular fillers after adding water;

[0050] (2) The fillers are built in loose ecological bags to form a percolation dam, with a total of 3 dams, of which 2 are at the inlet end and 1 at the outlet end of the landfill leachate. The purpose of choosing the ecological bag is that its water permeability can make the landfill leachate penetrate slowly and gradually. Then, the landfill leachate was collected at the water outlet for ion detection, and then compared with the ion concentration of the landfill leachate upstream of the water inlet. Apparently, the water color of landfill leachate has changed from dark brown turbid to brown and clearer, which reflects the strong pre-purification ability of the leachate dam;

[0051] When the effluent goes through the lime stripping process, the amount...

Embodiment 2

[0056] (1) Use 1 part by weight of low-grade limonite powder (specific surface area greater than 5 square meters / g, approximately muddy), 2 parts by weight of desulfurization gypsum, 1 part of hemihydrate gypsum and adhesion promoter (appropriate amount of polyacrylamide solution) Mixed, and then extruded and solidified to form a loose flocculation mixture filler;

[0057] (2) Put the filler into the ecological bag pre-installed with branches as the skeleton to form a loose infiltration dam body. The dosage of the reactant is the same as that in Example 1, and 3 channels are also set. The purpose of choosing the ecological bag is that it is permeable. Sexuality can make landfill leachate infiltrate slowly and gradually. Then, the landfill leachate was collected at the water outlet for ion detection, and then compared with the ion concentration of the landfill leachate upstream of the water inlet. Visually, the water color of landfill leachate changed from dark brown turbid to...

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Abstract

The invention discloses a method for treating landfill leachate by coupling high-alumina iron sludge and industrial waste from a water plant, which is used for deodorization and purification of landfill leachate. After the gypsum is mixed, water is added to solidify, and then added to the extruder to be processed into granular reactive fillers; (2) The prepared reactive fillers are loosely stacked into several percolating bodies, and then the landfill leachate is infiltrated in sequence Filter several leachates to obtain primary treatment landfill leachate; (3) Mix high-alumina iron sludge waste with chlorine or chloride-containing waste sulfuric acid to obtain siliceous mud acid aluminum iron sulfate, and the production waste gas is introduced into The leachate neutralizes the alkalinity. Then, the siliceous mud containing acidic aluminum ferric sulfate is dissolved and added to the primary treatment of landfill percolation for reaction to form flocculation sediments. After the flocculation sediments are separated, the deodorized and purified landfill leachate is obtained. The solution of the invention has low cost, realizes the utilization of waste resources, is environmentally friendly, and is reliable and effective in implementation.

Description

technical field [0001] The invention relates to the technical field of waste recycling, in particular to a method for treating landfill leachate by coupling high-aluminum iron sludge and industrial waste from water plants. Background technique [0002] At present, many domestic water plants mainly use aluminum ferric bicarbonate, polyaluminum chloride, aluminum sulfate, etc. as the main water purification agents, and few use polyacrylamide, polydimethyldiallyl ammonium chloride, etc. , cities with poor water quality correspondingly produce a large amount of high-aluminum iron sludge. The high-aluminum iron sludge itself has obvious aluminum toxicity, and usually also contains a large number of impurities such as manganese, organic matter, algae, humic acid, etc. The current environmental protection policy is strict. It is difficult to find a landfill under the control, which is the original motivation of the present invention; sulfuric acid needs to be used to absorb the moi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/06C02F101/34C02F101/20C02F101/16C02F101/10
CPCC02F9/00C02F1/66C02F1/5236C02F1/20C02F1/72C02F2101/16C02F2101/20C02F2101/101C02F2101/34C02F2103/06C02F2303/02
Inventor 陈楷翰辛朝晖陈志伟
Owner QUANZHOU NORMAL UNIV
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