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Method for preparing floccules coating packing type percolation dam convenient for landfill volume reduction

A technology of seepage dam and packing type, which is applied in the field of preparation of floc-coated packing type seepage dam for pollution control, which can solve the problem that the reactive seepage dam cannot achieve good results, the surface properties change drastically, and it is difficult to peel off the pollution. To achieve the effect of realizing secondary economic value, guaranteeing anti-scouring and simplifying sewage treatment facilities

Active Publication Date: 2019-09-24
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the ion exchange resin is crushed into powder, the experiment found that the residence time can be greatly reduced, but the resin bed is easy to leak, clog, and the used resin is difficult to collect
[0006] One method that colleagues can easily think of is the general backwashing idea, that is, the method of adding aeration pipes and flushing pipes to the sand filter tank to reduce the clogging of the reaction bed by reactants. The effect of the reaction bed is good, but it can’t play a good effect on the reaction type infiltration dam in theory, especially for the reaction infiltration dam with waste gypsum-high-iron mineral powder as raw material, after the reaction, the gypsum is basically whole Converted into calcium carbonate, the high iron minerals are basically converted into ferrous sulfide as a whole. There are a large amount of calcium humate deposited on the surface of the above minerals, the volume expands and there is an obvious tendency to embed and compact. The surface properties of the reactants all change drastically, and the mineral particles are extremely large. Small and there are a lot of colloidal substances on the surface, it is difficult to remove pollutants by backwashing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Case study of biodegradable floc packing reactive infiltration dam for pretreatment of landfill leachate in simple landfill

[0036] Address and background: In a garbage pit in a village in Hebei, a large amount of foul-smelling garbage leachate flows out along the ditch.

[0037] Solution: Design 2 gypsum hematite powder floc packing type reactive infiltration dams for pretreatment, sandwich a hydrogen peroxide-ferrous iron for Fenton treatment, and the effluent after pretreatment is introduced into the forest near the garbage pit for ecological ditch infiltration purify.

[0038] Among them, there are 2 gypsum hematite powder flocculation-filled reaction infiltration dams. The production process is: take 3 parts by weight of desulfurized gypsum powder from thermal power plants, and mix 1.2 parts by weight of hematite powder, and then mix them in an approximate volume ratio of 1 1 part of mixed mineral powder: 3 parts of straw fragments are stirred into a reaction mat...

Embodiment 2

[0042] Case study of degradable floc packing type reactive infiltration dam for pre-discharge treatment of black and odorous water in rural areas

[0043] Address and background: The drainage of a village in the outer suburbs of Quanzhou, because of the poor quality of the waste water from free-range pigs, the villagers used it to irrigate the vegetable fields.

[0044] Proposal: During the technical transformation of treatment, two reactive infiltration dams of degradable floc packing type are placed close to both sides of the ditch as water supply infiltration dams.

[0045] Among them, the inside of the infiltration dam is calcined alum stone powder / straw degradable floc filler type reactive infiltration dam (also uses the potassium in calcined alum stone powder to fertilize vegetable fields), and the outside is blast furnace water slag powder (which is an alkaline Porous and loose industrial waste, which can be used as filter material and neutralizes the weak acid function...

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Abstract

The invention discloses a method for preparing a floccules coating packing type percolation dam convenient for landfill volume reduction. The method comprises the following steps: (1) mixing a high-iron ore with waste gypsum so as to obtain a mixed material, further adding plant light packing-like chippings, carrying out mixing, adding water, carrying out stirring, further adding a polyacrylamide solution, carrying out a flocculation reaction on the mixed system, further adding an aluminum ion cross-linking agent, carrying out a mixing reaction, pouring the mixed material into a biological bag, and filtering off moisture in the reaction material so as to obtain a percolation dam piling unit; and (2) mutually overlapping a plurality of the percolation dam piling units, so as to form the percolation dam. The scheme is low in cost, environment-friendly and capable of achieving waste resource recycling.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a preparation method of a floc-coated filler type seepage dam for pollution control which is convenient for landfill volume reduction. Background technique [0002] The landfillable capacity reduction reaction seepage dam is different from the traditional seepage dam, and its characteristic is that the filling medium is gradually consumed by reaction during use and nearby landfill disposal, supplemented by adsorption and filtration functions. The traditional seepage dam filling medium is used as a filter material and microbial matrix, and the adsorption and filtration functions are the main reaction function, and the common porous materials are activated carbon, diatomaceous earth, cinder, steel slag, and volcanic ash. [0003] Among them, the reactants of the former are converted in situ, and the loose packing material is easy to biodegrade after being landfi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
CPCC02F1/00C02F2103/06C02F2303/02
Inventor 陈楷翰辛朝晖陈志伟
Owner QUANZHOU NORMAL UNIV