A preparation method of slow-release polyurethane mesh carrier and its application in chemical wastewater treatment

Abstract

The invention discloses a preparation method of a slow-release polyurethane netlike carrier. The method includes the following steps that firstly, a polyurethane foam carrier is provided; secondly, ahigh-molecular mixed solution containing natural polymer polysaccharides, water and a enrichment culture medium is provided; thirdly, the high-molecular mixed solution is used for dipping the polyurethane foam carrier; fourthly, the polyurethane foam carrier obtained after dipping makes contact with a cross-linking agent to form reversible gel, and the slow-release polyurethane netlike carrier isobtained. The invention further provides application of the slow-release polyurethane netlike carrier in chemical wastewater treatment.

Description

technical field

[0001] The invention relates to a preparation method of a slow-release polyurethane mesh carrier and its application in chemical wastewater treatment. Background technique

[0002] With the rapid development of my country's chemical industry, high-concentration organic chemical wastewater accounts for an increasing proportion of my country's sewage components. For high-concentration chemical wastewater with high pollutant concentration, complex water quality components, high toxicity, and many biodegradable substances , low B / C ratio, and poor biodegradability. Therefore, how to efficiently and economically treat high-concentration organic chemical wastewater has become a difficult point in the field of water treatment.

[0003] Microbe immobilization technology is a new type of biological treatment developed in recent years. It uses the static electricity and surface tension between the microorganisms and the carrier to immobilize the microorganisms on the s...

Examples

Embodiment 1

[0042] Step 1, the preparation of the polyurethane foam carrier of net shape open cell water absorption performance:

[0043]

[0044] After mixing the above-mentioned raw materials in sequence, mechanically stir (6000r / min) at 35-45°C for 3-5 minutes until uniform to obtain Component ①.

[0045] Component ②: Polyether 330: 20-35 parts

[0046] Diphenylmethane diisocyanate: 50-65 parts.

[0047] After mixing the above raw materials in sequence, stir (6000r / min) at 35-45°C for 2 minutes until uniform, and obtain Component ②.

[0048] Mix component ① with component ②, stir mechanically (200r / min), stop stirring after 10-30 seconds after foaming, foam at room temperature for 12-24 hours, and obtain a polyurethane foam carrier with net-shaped open cells and water-absorbing properties. Then cut into cuboid small pieces with a specification of 20×15×15mm.

[0049] Step 2, mix guar gum (GG) with deionized water, dissolve it completely at 80°C, let it stand and cool to 50°C, add...

Embodiment 2

[0075] Step 1, the preparation of the polyurethane foam carrier of net shape open cell water absorption performance:

[0076]

[0077] After mixing the above-mentioned raw materials in sequence, mechanically stir (6000r / min) at 35-45°C for 3-5 minutes until uniform to obtain Component ①.

[0078] Component ②: Polyether 330: 20-35 parts

[0079] Diphenylmethane diisocyanate: 50-65 parts.

[0080] After mixing the above raw materials in sequence, stir (6000r / min) at 35-45°C for 2 minutes until uniform, and obtain Component ②.

[0081] Mix component ① with component ②, stir mechanically (200r / min), stop stirring after 10-30 seconds after foaming, foam at room temperature for 12-24 hours, and obtain a polyurethane foam carrier with net-shaped open cells and water-absorbing properties. Then cut into cuboid small pieces with a specification of 20×15×15mm.

[0082] Step 2, mix sodium alginate (SA) with deionized water, dissolve it completely at 90°C, let it stand and cool to 40...

Embodiment 3

[0086] Step 1, the preparation of the polyurethane foam carrier of net shape open cell water absorption performance:

[0087]

[0088] After mixing the above-mentioned raw materials in sequence, mechanically stir (6000r / min) at 35-45°C for 3-5 minutes until uniform to obtain Component ①.

[0089] Component ②: Polyether 330: 20-35 parts

[0090] Diphenylmethane diisocyanate: 50-65 parts.

[0091] After mixing the above raw materials in sequence, stir (6000r / min) at 35-45°C for 2 minutes until uniform, and obtain Component ②.

[0092] Mix component ① with component ②, stir mechanically (200r / min), stop stirring after 10-30 seconds after foaming, foam at room temperature for 12-24 hours, and obtain a polyurethane foam carrier with net-shaped open cells and water-absorbing properties. Then cut into cuboid small pieces with a specification of 20×15×15mm.

[0093] Step 2, mix triacetyl cellulose (TCA) with deionized water, dissolve completely at 90°C, let it stand and cool to ...

technical field

[0001] The invention relates to a preparation method of a slow-release polyurethane mesh carrier and its application in chemical wastewater treatment. Background technique

[0002] With the rapid development of my country's chemical industry, high-concentration organic chemical wastewater accounts for an increasing proportion of my country's sewage components. For high-concentration chemical wastewater with high pollutant concentration, complex water quality components, high toxicity, and many biodegradable substances , low B / C ratio, and poor biodegradability. Therefore, how to efficiently and economically treat high-concentration organic chemical wastewater has become a difficult point in the field of water treatment.

[0003] Microbe immobilization technology is a new type of biological treatment developed in recent years. It uses the static electricity and surface tension between the microorganisms and the carrier to immobilize the microorganisms on the s...

Examples

Embodiment 1

[0042] Step 1, the preparation of the polyurethane foam carrier of net shape open cell water absorption performance:

[0043]

[0044] After mixing the above-mentioned raw materials in sequence, mechanically stir (6000r / min) at 35-45°C for 3-5 minutes until uniform to obtain Component ①.

[0045] Component ②: Polyether 330: 20-35 parts

[0046] Diphenylmethane diisocyanate: 50-65 parts.

[0047] After mixing the above raw materials in sequence, stir (6000r / min) at 35-45°C for 2 minutes until uniform, and obtain Component ②.

[0048] Mix component ① with component ②, stir mechanically (200r / min), stop stirring after 10-30 seconds after foaming, foam at room temperature for 12-24 hours, and obtain a polyurethane foam carrier with net-shaped open cells and water-absorbing properties. Then cut into cuboid small pieces with a specification of 20×15×15mm.

[0049] Step 2, mix guar gum (GG) with deionized water, dissolve it completely at 80°C, let it stand and cool to 50°C, add...

Embodiment 2

[0075] Step 1, the preparation of the polyurethane foam carrier of net shape open cell water absorption performance:

[0076]

[0077] After mixing the above-mentioned raw materials in sequence, mechanically stir (6000r / min) at 35-45°C for 3-5 minutes until uniform to obtain Component ①.

[0078] Component ②: Polyether 330: 20-35 parts

[0079] Diphenylmethane diisocyanate: 50-65 parts.

[0080] After mixing the above raw materials in sequence, stir (6000r / min) at 35-45°C for 2 minutes until uniform, and obtain Component ②.

[0081] Mix component ① with component ②, stir mechanically (200r / min), stop stirring after 10-30 seconds after foaming, foam at room temperature for 12-24 hours, and obtain a polyurethane foam carrier with net-shaped open cells and water-absorbing properties. Then cut into cuboid small pieces with a specification of 20×15×15mm.

[0082] Step 2, mix sodium alginate (SA) with deionized water, dissolve it completely at 90°C, let it stand and cool to 40...

Embodiment 3

[0086] Step 1, the preparation of the polyurethane foam carrier of net shape open cell water absorption performance:

[0087]

[0088] After mixing the above-mentioned raw materials in sequence, mechanically stir (6000r / min) at 35-45°C for 3-5 minutes until uniform to obtain Component ①.

[0089] Component ②: Polyether 330: 20-35 parts

[0090] Diphenylmethane diisocyanate: 50-65 parts.

[0091] After mixing the above raw materials in sequence, stir (6000r / min) at 35-45°C for 2 minutes until uniform, and obtain Component ②.

[0092] Mix component ① with component ②, stir mechanically (200r / min), stop stirring after 10-30 seconds after foaming, foam at room temperature for 12-24 hours, and obtain a polyurethane foam carrier with net-shaped open cells and water-absorbing properties. Then cut into cuboid small pieces with a specification of 20×15×15mm.

[0093] Step 2, mix triacetyl cellulose (TCA) with deionized water, dissolve completely at 90°C, let it stand and cool to ...

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