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A kind of mbbr filler and preparation method thereof

A substrate, hydrophilic technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve COD removal rate, ammonia nitrogen removal rate is not high, hydrophilic and biological The problems of poor affinity and high film hanging capacity of MBBR fillers can achieve the effect of convenient long-distance transportation, excellent physical properties, and large porosity.

Active Publication Date: 2022-04-19
安徽环境科技集团股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For existing MBBR fillers with poor hydrophilicity and bio-affinity, not easy to degrade, and component specific gravity greater than 1g / cm 3 , COD removal rate and ammonia nitrogen removal rate are not high, and the effluent COD is too high. This solution provides a hydrophilic substrate, MBBR filler and its preparation method. The prepared MBBR filler not only has a high film-hanging amount, but also has a fast rate. , and excellent hydrophilicity and bio-affinity, easy to degrade, packing density of 0.96-0.98g / cm 3 , and the effluent COD of the sewage treated with this packing is lower than 30mg / L

Method used

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  • A kind of mbbr filler and preparation method thereof
  • A kind of mbbr filler and preparation method thereof
  • A kind of mbbr filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Take the raw materials according to the components and proportions (parts by weight) of Example 1 in Table 1.

[0035] (2) Mix in high mixer for 5min, mix above-mentioned raw materials evenly, the blend after mixing is extruded and granulated by twin-screw extruder, wherein density regulator is added from side feeding port, the extruder The temperature of each zone is 130°C, 150°C, 165°C, 165°C, 165°C, 170°C, 175°C, 180°C, 180°C and 185°C from the feeding section to the head temperature in sequence. The length-to-diameter ratio of the extruder screw is 40, the extrusion screw speed is 350 rpm.

[0036] (3) The suspended filler base material obtained in step (2) is molded by an extruder, wherein the mouth film of the extruder is in a prescribed structural shape, and then cut to a prescribed length to obtain the final MBBR suspended filler.

Embodiment 2

[0038] (1) Take the raw materials by weighing the components and proportions (parts by weight) of Example 2 in Table 1.

[0039] (2) Mix in high mixer for 10min, mix the above-mentioned raw materials evenly, extrude the mixed blend by twin-screw extruder to granulate, wherein the density modifier is added from the side feeding port, and the The temperature of each zone is 150°C, 165°C, 185°C, 185°C, 185°C, 190°C, 195°C, 200°C, 200°C and 200°C from the feeding section to the head temperature in sequence. The length-to-diameter ratio of the extruder screw is 36. The extrusion screw speed is 350 rpm.

[0040] (3) The suspension filler base material obtained in step (2) is injected into the final MBBR suspension filler by injection molding machine

Embodiment 3

[0042] (1) Take the raw materials by weighing the components and proportions (parts by weight) of Example 3 in Table 1.

[0043] (2) Mix in high mixer for 15min, mix above-mentioned raw materials evenly, the blend after mixing is extruded and granulated by twin-screw extruder, wherein density modifier is added from side feeding port, the extruder The temperature of each zone is 140°C, 160°C, 180°C, 180°C, 180°C, 185°C, 185°C, 190°C, 190°C and 195°C from the feeding section to the die head, and the length-to-diameter ratio of the extrusion screw is 36 , the extrusion screw speed is 300 rpm.

[0044] (3) The suspended filler base material obtained in step (2) is molded by an extruder, wherein the mouth film of the extruder is in a prescribed structural shape, and then cut to a prescribed length to obtain the final MBBR suspended filler.

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Abstract

The invention belongs to the technical field of macromolecular materials and water treatment, and discloses an MBBR filler whose components include a hydrophilic base material, a toughening agent, light calcium carbonate, a density regulator, a biological nutrient salt, a biological active agent and a biological Enzyme activator. The toughening agent is copolymer grafted maleic anhydride; at the same time, hollow glass microspheres are selected as the density regulator, which not only solves the high density of the inorganic filler of the hydrophilic filler, but also solves the interface problem between the inorganic filler and the base material. The proposal also discloses its preparation method, and the prepared MBBR filler has better hydrophilicity and bio-affinity than polyethylene fillers. Used in MBBR process, COD removal rate> 85%, ammonia nitrogen removal rate> 95%, effluent COD<30mg / L, suitable for various types of sewage treatment with different carbon / nitrogen and ammonia / nitrogen ratios, is a high-efficiency, Highly effective and versatile MBBR filler.

Description

technical field [0001] The invention relates to a suspension filler for water treatment, which belongs to the technical field of polymer materials and water treatment, and more specifically relates to an MBBR filler and a preparation method thereof. Background technique [0002] In recent years, with the gradual promulgation and implementation of the national environmental protection policy, the improvement of people's awareness of environmental protection and the improvement of their attention, my country's sewage treatment has become more and more intensive, and various new treatment technologies and products have become more and more widely used. applied to sewage treatment. MBBR is a newly developed sewage treatment process in recent years. This process can purify sewage through the metabolism of anaerobic microorganisms and aerobic microorganisms. It is a relatively cost-effective sewage treatment method. The core of the MBBR process is the two interrelated biological e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/302C02F2101/16
Inventor 方降龙丁运生董献彬张强王平廖雄兵周意杨孙晓红葛倪林夏本成杜广礼蒋佩娟孔殿超张青
Owner 安徽环境科技集团股份有限公司
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