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MBBR filler and preparation method thereof

A technology of toughening agent and base material, which is applied in the field of MBBR filler and its preparation, can solve the problems of low COD removal rate, ammonia nitrogen removal rate, poor hydrophilicity and bio-affinity, and high film-hanging amount of MBBR filler, achieving Convenient for long-distance transportation, excellent physical properties, high porosity

Active Publication Date: 2020-05-29
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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  • MBBR filler and preparation method thereof
  • MBBR filler and preparation method thereof
  • 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 high polymer materials and water treatment, and discloses an MBBR (Moving Bed Biofilm Reactor) filler which comprises the following components: a hydrophilic substrate, a toughening agent, light calcium carbonate, a density regulator, biological nutritive salt, a biological active agent and a biological enzyme activator. The toughening agent is copolymer grafted maleic anhydride, and meanwhile, hollow glass beads are selected as the density regulator, so that the problems of high density of inorganic filler of a hydrophilic filler agent and interface between the inorganic filler and a base material are solved. The invention also discloses a preparation method of the MBBR filler. Compared with polyethylene fillers, the prepared MBBR filler hasbetter hydrophilicity and biocompatibility. When the MBBR filler is used in an MBBR process, the COD removal rate is more than 85%, the ammonia nitrogen removal rate is more than 95% and the effluentCOD is less than 30mg / L. The MBBR filler is suitable for treatment of various sewage with different carbon / nitrogen and ammonia / nitrogen ratios, and is high in efficiency, high in aging and strong inuniversality.

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 Applications(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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