Carrier immobilized microorganism sewage treatment agent and preparation method thereof

Abstract

Compared with the scheme that zero-valent iron and microorganisms are loaded on the same carrier in the prior art, the carrier-immobilized microorganism sewage treatment agent is provided with a graphite carrier A and a graphite carrier B, the graphite carrier A is used for loading the zero-valent iron, and the graphite carrier B is used for loading the microorganisms; through the arrangement of the graphite carrier A and the graphite carrier B, the attachment contact between the microorganisms and the zero-valent iron is reduced, so that the influence of the zero-valent iron on the microorganisms is effectively avoided; the invention discloses a carrier immobilized microorganism sewage treatment agent and a preparation method thereof, the process design is reasonable, the operation is simple, and the prepared sewage treatment agent has an excellent treatment effect on hexavalent chromium wastewater, is low in cost and high in efficiency, can be widely applied to sewage treatment of hexavalent chromium wastewater, and has relatively high practicability.

Description

technical field

[0001] The invention relates to the field of sewage treatment, in particular to a carrier-solidified microbial sewage treatment agent and a preparation method thereof. Background technique

[0002] Chromium and its compounds are widely used in industry. A series of industries such as metallurgy, chemical industry, mineral engineering, electroplating, chromium production, pigments, pharmaceuticals, light industry textiles, chromium salts and chromium compounds will produce a large amount of chromium. Wastewater, and chromium has extremely serious harm to the ecological environment and human health, so the removal of chromium-containing wastewater has become one of the hot topics that have attracted attention today.

[0003] Zero-valent iron is a material widely used in the removal of chromium in wastewater. It has the characteristics of low cost, strong reducing ability, and good biocompatibility. Under anaerobic conditions, zero-valent iron can react with wat...

Examples

Embodiment 1

[0040] A preparation method for carrier-solidified microbial sewage treatment agent, comprising the following steps:

[0041] (1) Take flake graphite, place it in a mixed solution of nitric acid and phosphoric acid, add potassium permanganate, mix and stir for 20 minutes, react in a water bath at 20°C for 1 hour, wash and filter with deionized water, and dry in vacuum to obtain pretreated graphite;

[0042] (2) Take the pretreated graphite, preheat it at 800°C for 3 minutes, then dissolve it in a mixed solution of deionized water and absolute ethanol, stir it ultrasonically for 2 hours, add epoxy silane coupling agent, and place it in a constant temperature water bath at 75°C Stir for 8 hours, wash and filter with suction, and dry under vacuum at 80°C to obtain graphite carrier A; the epoxy silane coupling agent is KH-560.

[0043] (3) Take graphite carrier A and metal chloride, put them in a ball mill for ball milling for 2 hours, then transfer them to a vacuum tube furnace, ev...

Embodiment 2

[0050] A preparation method for carrier-solidified microbial sewage treatment agent, comprising the following steps:

[0051] (1) Take graphite flakes, place them in a mixed solution of nitric acid and phosphoric acid, add potassium permanganate, mix and stir for 25 minutes, react in a water bath at 25°C for 0.6 hours, wash and filter with deionized water, and dry in vacuum to obtain pretreated graphite;

[0052] (2) Take the pretreated graphite, preheat it at 850°C for 2 minutes, then dissolve it in a mixed solution of deionized water and absolute ethanol, stir it ultrasonically for 2.2 hours, add epoxy silane coupling agent, and place it in a constant temperature water bath at 78°C Stir at low temperature for 7.5 hours, wash and filter with suction, and dry under vacuum at 83°C to obtain graphite carrier A; the epoxy silane coupling agent is KH-560.

[0053] (3) Take graphite carrier A and metal chloride, put them in a ball mill for ball milling for 2.5 hours, then transfer ...

Embodiment 3

[0060] A preparation method for carrier-solidified microbial sewage treatment agent, comprising the following steps:

[0061] (1) Take flake graphite, place it in a mixed solution of nitric acid and phosphoric acid, add potassium permanganate, mix and stir for 30 minutes, react in a water bath at 30°C for 1 hour, wash and filter with deionized water, and dry in vacuum to obtain pretreated graphite;

[0062] (2) Take the pretreated graphite, preheat it at 900°C for 3 minutes, then dissolve it in a mixed solution of deionized water and absolute ethanol, stir it ultrasonically for 2.5 hours, add epoxy silane coupling agent, and place it in a constant temperature water bath at 80°C Stir at low temperature for 8 hours, wash and filter with suction, and dry under vacuum at 85°C to obtain graphite carrier A; the epoxy silane coupling agent is KH-560.

[0063] (3) Take the graphite carrier A and the metal chloride, put them in a ball mill and mill them for 3 hours, then transfer them ...

technical field

[0001] The invention relates to the field of sewage treatment, in particular to a carrier-solidified microbial sewage treatment agent and a preparation method thereof. Background technique

[0002] Chromium and its compounds are widely used in industry. A series of industries such as metallurgy, chemical industry, mineral engineering, electroplating, chromium production, pigments, pharmaceuticals, light industry textiles, chromium salts and chromium compounds will produce a large amount of chromium. Wastewater, and chromium has extremely serious harm to the ecological environment and human health, so the removal of chromium-containing wastewater has become one of the hot topics that have attracted attention today.

[0003] Zero-valent iron is a material widely used in the removal of chromium in wastewater. It has the characteristics of low cost, strong reducing ability, and good biocompatibility. Under anaerobic conditions, zero-valent iron can react with wat...

Examples

Embodiment 1

[0040] A preparation method for carrier-solidified microbial sewage treatment agent, comprising the following steps:

[0041] (1) Take flake graphite, place it in a mixed solution of nitric acid and phosphoric acid, add potassium permanganate, mix and stir for 20 minutes, react in a water bath at 20°C for 1 hour, wash and filter with deionized water, and dry in vacuum to obtain pretreated graphite;

[0042] (2) Take the pretreated graphite, preheat it at 800°C for 3 minutes, then dissolve it in a mixed solution of deionized water and absolute ethanol, stir it ultrasonically for 2 hours, add epoxy silane coupling agent, and place it in a constant temperature water bath at 75°C Stir for 8 hours, wash and filter with suction, and dry under vacuum at 80°C to obtain graphite carrier A; the epoxy silane coupling agent is KH-560.

[0043] (3) Take graphite carrier A and metal chloride, put them in a ball mill for ball milling for 2 hours, then transfer them to a vacuum tube furnace, ev...

Embodiment 2

[0050] A preparation method for carrier-solidified microbial sewage treatment agent, comprising the following steps:

[0051] (1) Take graphite flakes, place them in a mixed solution of nitric acid and phosphoric acid, add potassium permanganate, mix and stir for 25 minutes, react in a water bath at 25°C for 0.6 hours, wash and filter with deionized water, and dry in vacuum to obtain pretreated graphite;

[0052] (2) Take the pretreated graphite, preheat it at 850°C for 2 minutes, then dissolve it in a mixed solution of deionized water and absolute ethanol, stir it ultrasonically for 2.2 hours, add epoxy silane coupling agent, and place it in a constant temperature water bath at 78°C Stir at low temperature for 7.5 hours, wash and filter with suction, and dry under vacuum at 83°C to obtain graphite carrier A; the epoxy silane coupling agent is KH-560.

[0053] (3) Take graphite carrier A and metal chloride, put them in a ball mill for ball milling for 2.5 hours, then transfer ...

Embodiment 3

[0060] A preparation method for carrier-solidified microbial sewage treatment agent, comprising the following steps:

[0061] (1) Take flake graphite, place it in a mixed solution of nitric acid and phosphoric acid, add potassium permanganate, mix and stir for 30 minutes, react in a water bath at 30°C for 1 hour, wash and filter with deionized water, and dry in vacuum to obtain pretreated graphite;

[0062] (2) Take the pretreated graphite, preheat it at 900°C for 3 minutes, then dissolve it in a mixed solution of deionized water and absolute ethanol, stir it ultrasonically for 2.5 hours, add epoxy silane coupling agent, and place it in a constant temperature water bath at 80°C Stir at low temperature for 8 hours, wash and filter with suction, and dry under vacuum at 85°C to obtain graphite carrier A; the epoxy silane coupling agent is KH-560.

[0063] (3) Take the graphite carrier A and the metal chloride, put them in a ball mill and mill them for 3 hours, then transfer them ...