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Method for synergistically removing activated sludge moisture from non-ferrous metal tailings

A technology of activated sludge and non-ferrous metals, which is applied in the direction of water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problems of limited amount of blended combustion and high water content of sludge, and achieve the goal of improving blending The effect of burning capacity, high degree of solidification, and not easy to contaminate production equipment

Inactive Publication Date: 2020-09-15
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem of deep dehydration of the sludge due to the limited blending amount caused by the high water content of the sludge when the cement kiln co-processes the activated sludge

Method used

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  • Method for synergistically removing activated sludge moisture from non-ferrous metal tailings
  • Method for synergistically removing activated sludge moisture from non-ferrous metal tailings
  • Method for synergistically removing activated sludge moisture from non-ferrous metal tailings

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Embodiment 1

[0018] (1) Source and composition of raw materials

[0019] The tailings raw material used is non-ferrous metal tin ore tailings from Dachang, Nandan, Guangxi, and its XRD crystal phase structure and SEM morphology are shown in the attached figure 2 and image 3 As shown, its main components are shown in Table 1; the activated sludge raw material used is dewatered activated sludge from a municipal sewage treatment plant in Guilin, Guangxi, and its appearance is shown in the attached Figure 4 As shown, the main inorganic components in the sludge moisture content and ash are shown in Table 2; the comparison table of the main components of typical cement raw materials is shown in Table 3.

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Abstract

The invention discloses a method for synergistically removing activated sludge moisture from non-ferrous metal tailings. The method is characterized in that a small amount of a chitosan demulsifier isadded for conditioning, microbial cells and capillary adhesive films in the activated sludge are destroyed under a certain pressure by utilizing high hardness and irregular acute angle morphology ofthe non-ferrous metal tailings, and meanwhile, the outflow resistance of water is improved by adding absolute ethyl alcohol, so that deep dehydration of the activated sludge is achieved. The solidification degree of a dehydration filter pressing cake is high, the comminution is good, the viscosity of the sludge is remarkably reduced, the sludge can be mixed with cement clay and other raw materials, the solid waste of the non-ferrous metal tailings is similar to cement materials in component, and conditions can be provided for improving the blending combustion amount and the comprehensive reduction treatment rate of cement kiln co-treatment blending combustion activated sludge and reducing comprehensive utilization of the non-ferrous metal tailings.

Description

technical field [0001] The invention relates to a method for synergistically removing moisture from activated sludge with non-ferrous metal tailings. It involves the destruction of sludge structure by non-ferrous metal tailings, which can realize the deep dehydration of activated sludge. Background technique [0002] Activated sludge is solid waste produced by domestic sewage treatment plants, papermaking and sugar industrial sewage plants, etc. The sludge output is relatively large, which can easily cause secondary pollution to the environment. The residual components after activated sludge incineration are mainly inorganic substances (SiO 2 、A1 2 o 3 , Fe 2 o 3 , CaO, MgO, etc.), for example, the main mineral components of activated sludge of a sewage treatment plant in Nanning, Guangxi account for nearly 25%, of which SiO 2 up to 15%, Al 2 o 3 , Fe 2 o 3 CaO and CaO accounted for 4%, 2% and 1% respectively, which are close to the components required by cement ma...

Claims

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Application Information

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IPC IPC(8): C02F11/147C02F11/122C04B7/24
CPCC02F11/147C02F11/122C04B7/24C02F2303/06Y02P40/10
Inventor 唐富顺韦夏夏谭宗勇张敏程成李磊
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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