Suspending porous biological carrier and preparation

A biological carrier and carrier technology, applied in sustainable biological treatment, biological water/sewage treatment, chemical instruments and methods, etc., can solve the problems of large specific gravity and high manufacturing cost, achieve good buoyancy retention and shorten colonization time. Effect

Active Publication Date: 2008-03-26
JIANGSU YULONG ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This carrier is obviously not suitable for use as a suspension carrier because the specific gravity is greater than water; secondly, the manufacturing cost of the carrier is relat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: with 40 order rubber tire powder 42wt%, graft modified starch 5wt%, zinc oxide 1wt%, magnesium hydroxide 1.5wt%, paraffin 1wt%, barium stearate 1.5wt%, tremolite powder 7wt% Put it into a high-speed mixer, heat mix at a high speed, control the temperature at 100-120°C, after mixing evenly, cool down to below 60°C, add 1wt% of dinitrosopentamethylenetetramine, cold mix at a low speed until uniform, add polyethylene 40wt% mixed well. Put the mixture into the single-screw extruder, co-extrude it into tubes, sheets, and rods (depending on the shape of the die) at 90-190 ° C, measure the specific gravity, and transport it to the tunnel heating furnace through the conveyor belt. After 120 Bake at ~170°C for 1-20 minutes to the required specific gravity, and cut into small pieces according to the required length after water cooling.

Embodiment 2

[0028] Embodiment 2: 40 order waste rubber powder 70wt%, agar 1wt%, manganese oxide 0.05wt%, light calcium carbonate 0.55wt%, liquid paraffin 1.3wt%, stearic acid 1wt% add in the high-speed mixer, high-speed thermal mixing, Control the temperature at 100-120°C, after mixing evenly, lower the temperature to below 60°C, add 0.1wt% of 4,4'-oxobisbenzenesulfonyl hydrazide, mix at low speed until uniform, add 26wt% of polypropylene and mix evenly, move into Single-screw extruder, blending and extruding tubes, sheets, and rods at 90-190°C, then sent to a tunnel-type heating furnace, baked at 120-170°C for 1-20 minutes to the required specific gravity, and cooled by water according to the required length Cut into segments.

Embodiment 3

[0029] Embodiment 3: 40 order waste rubber powder 56wt%, polylactic acid 1wt%, manganese oxide 0.3wt%, light calcium carbonate 0.4wt%, tremolite 4wt%, N, N '-ethylene bis stearamide 3wt% , after stirring and mixing evenly, add 0.3wt% of 4,4'-oxobisbenzenesulfonyl hydrazide and mix evenly, add soft polyvinyl chloride powder 35wt% and mix evenly, move it into a single-screw extruder, heat through 90-190°C Blend and extrude tubes, sheets, and rods, send them to a tunnel-type heating furnace and bake at 120-170°C for 1-20 minutes to the required specific gravity, and cut into sections according to the required length after water cooling. The temperature control is roughly the same as before.

[0030] In addition, the microbial nutrients and processing modifiers of the present invention can also be added externally, that is, added by weight outside the component materials. Resin Resin can also be used. The ratio of resin to rubber powder can be selected arbitrarily within the sco...

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PUM

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Abstract

The present invention relates to one kind of suspended microbial carrier for biological waste water treatment. The mixture of rubber powder in 35-70 wt%, resin in 25-55 wt%, chemical foaming agent in 0.1-5 wt% and specific weight regulating material in 0-10 wt% is hot extruded to form shaped body of 0.90-1.1 g/cu cm specific weight and with great amount of closed bubbles. The suspended microbial carrier has great buoyancy, and can maintain suspension state in treated water after microbe attachment. In addition, nutritious matter may be added into the carrier material for promoting the colonization and growth of microbe.

Description

technical field [0001] The invention relates to a suspended microbial carrier for wastewater biological treatment, in particular to the improvement of a rubber powder-bonded suspended biological carrier and a preparation method. Background technique [0002] Various suspension carriers are often used as microbial carriers in sewage biological treatment. Rubber powder-bonded suspension carriers are valued because of their unique characteristics, such as high strength, good wear resistance, strong chemical resistance, appropriate specific gravity, and high porosity. . [0003] The granular carrier for wastewater treatment disclosed in Chinese patent CN96120357.9 has 100 parts by weight of tire powder; 30-50 parts by weight of EVA or its derivative binder, 5-10 parts by weight of activated carbon or the equivalent of inorganic superfine powder , Add EVA to the molten mixture at 100-250°C, stick activated carbon on the surface of the mixture, extrude and cut the mixture, and th...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 黄东辉
Owner JIANGSU YULONG ENVIRONMENTAL PROTECTION
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