Biological filter material based on sulfur-containing tailings as well as preparation method and application thereof
A technology of biological filter material and tailings, which is applied in the direction of chemical instruments and methods, biological water/sewage treatment, water pollutants, etc. It can solve the problem of acidic wastewater affecting the surrounding ecological environment, without a good way to absorb it, and prone to weathering, etc. problems, to achieve the effect of omitting the sintering procedure, reducing the thickness and increasing the microbial biomass
A technology of biological filter material and tailings, which is applied in the direction of chemical instruments and methods, biological water/sewage treatment, water pollutants, etc. It can solve the problem of acidic wastewater affecting the surrounding ecological environment, without a good way to absorb it, and prone to weathering, etc. problems, to achieve the effect of omitting the sintering procedure, reducing the thickness and increasing the microbial biomass
CN110818077AActive Publication Date: 2020-02-21ANHUI UNIVERSITY OF ARCHITECTURE +1
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Embodiment 1
[0035] The present embodiment provides a kind of preparation method based on sulfur-containing tailings biological filter material, and the steps include:
[0036] (1) Activation treatment of sulfur-containing tailings
[0037] In this embodiment, alum tailings are selected as raw materials, but not limited thereto, and other types of sulfur-containing tailings are also suitable for the present invention. After crushing and ball milling, the alum ore tailings are mixed evenly with limestone at a mass ratio of 9:1, and chemically activated at 400°C for 2 hours under a nitrogen atmosphere, and the activated tailings are ball milled for later use.
[0038] (2) Preparation of sludge biochar
[0039]Take the remaining sludge from the sewage treatment process, dry it at 105°C, soak it in 2-5mol / L zinc chloride solution for activation treatment, then dry it at 105°C, and put it in a nitrogen atmosphere furnace. Carbonize at 600°C and keep warm for 2 hours to obtain sludge biochar, ...
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Abstract
The invention relates to a biological filter material based on sulfur-containing tailings as well as a preparation method and application of the biological filter material, and belongs to the technical field of sewage treatment. The biological filter material is prepared by taking sulfur-containing tailings as a raw material, carrying out mechanical force treatment, chemical activation and thermalactivation, compounding the sulfur-containing tailings with sludge biochar prepared from excess sludge, and limestone, and taking aluminum dihydrogen phosphate as a binder. The biological filter material can be used for advanced treatment of secondary effluent with low C / N, no additional organic carbon source is needed, thiobacillus denitrificans are adopted to utilize sulfur in tailings for self-oxidation denitrification, the TN concentration can be reduced to 5 mg / L or below, and the purpose of treating waste with waste is achieved. The sulfur-containing tailings activated by limestone andsludge biochar are used as biofilm carriers, so that the specific surface area of the biological filter material is increased, and the self-oxidation denitrification mass transfer rate of microorganisms is also increased; and aluminum dihydrogen phosphate is used as a binder, so that the operation is convenient, the biological filter material can form a uniform structure, the structural defects ofthe biological filter material are reduced, and the application prospect is good.
Description
technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a biological filter material based on sulfur-containing tailings and its preparation method and application. Background technique [0002] Excessive use of nitrogen fertilizers in agriculture and the discharge of domestic sewage and industrial wastewater lead to a large amount of nitrogen entering the water environment. High levels of nitrogen cause water eutrophication and degradation of water environment quality, threatening human health. In order to strengthen urban domestic pollution control and speed up the construction and renovation of urban sewage treatment facilities, a series of water environment treatment work has been launched, including comprehensive treatment of human lakes and rivers, urban non-point source pollution control, and upgrading of sewage treatment plants. Among them, the upgrading and transformation of urban sewage treatment plants is to furthe...
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Patent Timeline
21 Feb 2020
Publication
CN110818077A
- IPC
- C02F3/28; C02F101/16
- CPC
- C02F3/2806; C02F2101/16; C02F2209/15; C02F2209/16
- Inventors
- 凌琪; 伍昌年