Multi-hole foam glass carrier for fast mass transfer biological fluidized bed and preparation method and application thereof

Abstract

The invention relates to a multi-hole foam glass carrier for a fast mass transfer biological fluidized bed and a preparation method and application thereof, which belong to sewage disposal technology. The multi-hole foam glass carrier is prepared by using waste glass as a raw material to be composited with volcanic rocks, coal ash, coal gangue, furnace clinker, iron powder, aluminum powder, binding agents, foaming agents, foam stabilizer and fluxing agents by weight, and multi-hole foam glass is obtained by stages of preheating, fast sintering, foaming, fast cooling and annealing. The preparation process of the multi-hole foam glass carrier is simple in route, easy to control and low in cost, and the prepared carrier is stable in performance, high in porosity, large in specific surface area, resisting in impact, good in mechanical performance, high in biocompatibility, favorable to efficient fixing of the microorganism, and suitable to the fast mass transfer biological fluidized bed. The multi-hole foam glass carrier solves the problem that biological immobilization carriers in the prior art are easy to abrade, small in bio-film formation amount, low in mass transfer effects and the like in the fast mass transfer biological fluidized bed. The preparation method opens up new approaches for preparing the biological carriers, and fills blank spaces in using of foam glass materials in sewage disposal.

Description

technical field

[0001] The invention relates to a porous foam glass carrier used for rapid mass transfer biological fluidized bed and its preparation method and application, belonging to the sewage treatment technology. The porous foam glass carrier GM-2 with suitable density is made from waste glass, volcanic rock, slag and other wastes through a simple process. It has low cost and stable performance, and is suitable for rapid mass transfer biological fluidized bed. Background technique

[0002] Biological fluidized bed (FBR) wastewater treatment technology is a high-efficiency wastewater biological treatment process developed in the 1970s. It increases the gas-liquid-solid three The relative flow velocity between phases is poor, which accelerates the mass transfer between phases and the replacement of old and new microorganisms, thereby greatly improving the efficiency of biological wastewater treatment. Compared with other bioreactors, the biological fluidized bed has hi...

Examples

Embodiment 1

[0049] Clean the bottle glass, and after drying, ball-mill it into glass powder below 200 mesh; mix 5Kg of bottle glass powder, 1.68Kg of volcanic rock, 0.8Kg of fly ash, 0.2Kg of coal gangue, 0.5Kg of slag, Put 1Kg of iron powder, 0.5Kg of aluminum powder, 0.1Kg of polyethylene glycol-400, 0.1Kg of silicon carbide, 0.06Kg of sodium phosphate and 0.06Kg of mullite into a ball mill jar and mill to 200 mesh The following steps are added to the mold for foaming: in the preheating stage, the temperature is raised from room temperature to 300°C at a rate of 5°C / min and kept for 20 minutes; in the rapid sintering stage, the temperature is raised from 300°C to 730°C at a rate of 15°C / min and Keep warm for 10 minutes; in the foaming stage, raise the temperature from 730°C to 850°C at a rate of 9°C / min and hold for 20 minutes; After annealing to 400°C, the temperature is rapidly lowered at a rate of 12°C / min to obtain a porous foam glass carrier for rapid mass transfer biological fluid...

Embodiment 2

[0054] Clean the flat glass, and after drying, ball-mill it into glass powder below 200 mesh; mix 5Kg of flat glass powder, 1.2Kg of volcanic rock, 0.87Kg of fly ash, 0.2Kg of coal gangue, 0.7Kg of slag, and 1.07Kg of Iron powder, 0.55Kg of aluminum powder, 0.12Kg of polyvinyl alcohol, 0.14Kg of carbon black, 0.07Kg of sodium dihydrogen phosphate and 0.08Kg of borax mixture are put into a ball mill jar, and ball milled to below 200 mesh and added to a mold for Foaming: In the preheating stage, raise the temperature from room temperature to 300°C at a rate of 6°C / min and keep it warm for 25 minutes; In the soaking stage, the temperature was raised from 730°C to 860°C at a heating rate of 10°C / min and held for 25 minutes; in the rapid cooling stage, the cooling rate was 14°C / min, and the temperature was dropped to 615°C for 35 minutes; in the annealing stage, the cooling rate was 1°C / min. min, after annealing to 410°C, the temperature was rapidly lowered at a rate of 18°C / min to...

Embodiment 3

[0059] Clean the glass of discarded laboratory instruments, and ball-mill it into glass powder below 200 mesh after drying; 3Kg of discarded laboratory instrument glass glass powder, 1.5Kg of volcanic rock, 1.6Kg of fly ash, 0.8Kg of coal gangue, Put 0.65Kg of slag, 1.45Kg of iron powder, 0.65Kg of aluminum powder, 0.1Kg of polyvinyl alcohol, 0.1Kg of carbon black, 0.08Kg of sodium dihydrogen phosphate and 0.07Kg of borax mixture into the ball mill tank, and ball mill Fill the mold below 200 mesh for foaming: in the preheating stage, raise the temperature from room temperature to 310°C at a rate of 7°C / min and keep it warm for 25 minutes; in the stage of rapid sintering, raise the temperature from 310°C to 740°C and hold for 15 minutes; in the foaming stage, raise the temperature from 740°C to 870°C at a rate of 11°C / min and hold for 23 minutes; in the rapid cooling stage, cool down to 620°C and hold for 37 minutes at a rate of 15°C / min; in the annealing stage , the cooling ra...

technical field

[0001] The invention relates to a porous foam glass carrier used for rapid mass transfer biological fluidized bed and its preparation method and application, belonging to the sewage treatment technology. The porous foam glass carrier GM-2 with suitable density is made from waste glass, volcanic rock, slag and other wastes through a simple process. It has low cost and stable performance, and is suitable for rapid mass transfer biological fluidized bed. Background technique

[0002] Biological fluidized bed (FBR) wastewater treatment technology is a high-efficiency wastewater biological treatment process developed in the 1970s. It increases the gas-liquid-solid three The relative flow velocity between phases is poor, which accelerates the mass transfer between phases and the replacement of old and new microorganisms, thereby greatly improving the efficiency of biological wastewater treatment. Compared with other bioreactors, the biological fluidized bed has hi...

Examples

Embodiment 1

[0049] Clean the bottle glass, and after drying, ball-mill it into glass powder below 200 mesh; mix 5Kg of bottle glass powder, 1.68Kg of volcanic rock, 0.8Kg of fly ash, 0.2Kg of coal gangue, 0.5Kg of slag, Put 1Kg of iron powder, 0.5Kg of aluminum powder, 0.1Kg of polyethylene glycol-400, 0.1Kg of silicon carbide, 0.06Kg of sodium phosphate and 0.06Kg of mullite into a ball mill jar and mill to 200 mesh The following steps are added to the mold for foaming: in the preheating stage, the temperature is raised from room temperature to 300°C at a rate of 5°C / min and kept for 20 minutes; in the rapid sintering stage, the temperature is raised from 300°C to 730°C at a rate of 15°C / min and Keep warm for 10 minutes; in the foaming stage, raise the temperature from 730°C to 850°C at a rate of 9°C / min and hold for 20 minutes; After annealing to 400°C, the temperature is rapidly lowered at a rate of 12°C / min to obtain a porous foam glass carrier for rapid mass transfer biological fluid...

Embodiment 2

[0054] Clean the flat glass, and after drying, ball-mill it into glass powder below 200 mesh; mix 5Kg of flat glass powder, 1.2Kg of volcanic rock, 0.87Kg of fly ash, 0.2Kg of coal gangue, 0.7Kg of slag, and 1.07Kg of Iron powder, 0.55Kg of aluminum powder, 0.12Kg of polyvinyl alcohol, 0.14Kg of carbon black, 0.07Kg of sodium dihydrogen phosphate and 0.08Kg of borax mixture are put into a ball mill jar, and ball milled to below 200 mesh and added to a mold for Foaming: In the preheating stage, raise the temperature from room temperature to 300°C at a rate of 6°C / min and keep it warm for 25 minutes; In the soaking stage, the temperature was raised from 730°C to 860°C at a heating rate of 10°C / min and held for 25 minutes; in the rapid cooling stage, the cooling rate was 14°C / min, and the temperature was dropped to 615°C for 35 minutes; in the annealing stage, the cooling rate was 1°C / min. min, after annealing to 410°C, the temperature was rapidly lowered at a rate of 18°C / min to...

Embodiment 3

[0059] Clean the glass of discarded laboratory instruments, and ball-mill it into glass powder below 200 mesh after drying; 3Kg of discarded laboratory instrument glass glass powder, 1.5Kg of volcanic rock, 1.6Kg of fly ash, 0.8Kg of coal gangue, Put 0.65Kg of slag, 1.45Kg of iron powder, 0.65Kg of aluminum powder, 0.1Kg of polyvinyl alcohol, 0.1Kg of carbon black, 0.08Kg of sodium dihydrogen phosphate and 0.07Kg of borax mixture into the ball mill tank, and ball mill Fill the mold below 200 mesh for foaming: in the preheating stage, raise the temperature from room temperature to 310°C at a rate of 7°C / min and keep it warm for 25 minutes; in the stage of rapid sintering, raise the temperature from 310°C to 740°C and hold for 15 minutes; in the foaming stage, raise the temperature from 740°C to 870°C at a rate of 11°C / min and hold for 23 minutes; in the rapid cooling stage, cool down to 620°C and hold for 37 minutes at a rate of 15°C / min; in the annealing stage , the cooling ra...

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