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Water treatment composite material

A composite material and water treatment technology, applied in the direction of anaerobic digestion treatment, etc., can solve the problems of small specific surface area of ​​particles, unsuitable application, low treatment efficiency, etc., to avoid secondary pollution, good recyclability, convenient delivery and The effect of recycling

Active Publication Date: 2014-12-03
TIANAN BIOLOGIC MATERIAL NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthetic polymers (PLA, PHA, etc.) currently used in water treatment are all granular. Although they can form bacterial films on their surfaces, the specific surface area of ​​the particles is small, the treatment efficiency is low, the controllability is poor, and it is difficult to recycle. Not suitable for application in large water bodies

Method used

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  • Water treatment composite material
  • Water treatment composite material
  • Water treatment composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take poly 3-hydroxybutyrate (P-3HB) with a weight average molecular weight of 570,000, polylactic acid (PLA) with a weight average molecular weight of 60,000, a molar content of L optical isomer of 42%, and a melt index of 25g / 10min of polyethylene (PE) for vacuum drying, the drying temperature is 60 ± 5 o C. The drying time is 16 hours, and the vacuum is 100 Pa; take 49.5 kg of dried P-3HB and 40.5 kg of dried PLA and physically mix them into a skin layer mixture in a high-speed mixer; mix the skin layer mixture (carbon source material) and After drying, 10 kg of PE (support material) is injected into the corresponding screw of the skin layer component and the corresponding screw of the core layer component of the two-component melt spinning machine to melt, and is spun on the skin layer through a metering pump and a skin-core composite special-shaped spinneret. temperature is 190 o C, core layer spinning temperature is 220 o C. Extrude into fibers at a spinning spe...

Embodiment 2

[0042] Take poly 3-hydroxybutyrate (P-3HB) with a weight average molecular weight of 1.05 million, polylactic acid (PLA) with a weight average molecular weight of 120,000, a molar content of L optical isomer of 98%, and a melt index of 41g / 10min of polypropylene (PP) for vacuum drying, the drying temperature is 60 ± 5 o C. The drying time is 16 hours, and the vacuum degree is 100Pa; take 15 kg of dried P-3HB and 35 kg of dried PLA and physically mix them into a mixture in a high-speed mixer; mix the mixture (carbon source material) and the dried 50 kg of PP (support material) were respectively injected into the corresponding screw of the two-component melt spinning machine to be melted, and the carbon source material spinning temperature was 211 through the metering pump and the parallel composite spinneret o C, supporting material spinning temperature is 240 o C. Extrude into composite fibers at a spinning speed of 1500m / min; at 60 o C draft 2.5 times, and then at 63 o C ...

Embodiment 3

[0044] Take poly 3-hydroxybutyrate (P-3HB) with a weight average molecular weight of 90,000 and polylactic acid (PLA) with a weight average molecular weight of 180,000 and a molar content of L optical isomer of 70% for vacuum drying. 60±5 o C. The drying time is 16 hours, the vacuum degree is 100Pa, and the PTT with a melt index of 9g / 10min is used for vacuum drying, and the drying temperature is 110±5 o C. The drying time is 16 hours, and the vacuum degree is 100 Pa; take 0.5 kg of dried P-3HB and 9.5 kg of dried PLA and physically mix them into a skin layer mixture in a high-speed mixer; mix the skin layer mixture (carbon source material) and 90 kg of dried PTT (support material) is respectively injected into the corresponding screw of the cortex component and the corresponding screw of the core component of the two-component melt spinning machine to be melted. for 225 o C, core layer spinning temperature is 260 o C. Extrude into fibers at a spinning speed of 2500m / min; a...

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Abstract

The invention relates to a water treatment composite material. Synthetic polymers used in water treatment at present are granular in shape, and have the disadvantages of low treatment efficiency, bad controllability and difficult recovery. The water treatment composite material is a fabric formed by weaving a composite fiber, or is a non-woven fabric or felt formed by the composite fiber, wherein the composite fiber is formed by a continuous support material and a carbon source material, the carbon source material completely or partially covers outside the support material, or the support material and the carbon source material are arranged in parallel. The carbon source material provides an organic carbon source and a biofilm carrier for denitrifying bacteria, the specific surface area is increased through adopting the fiber mode, and the support material cannot be biodegraded in the water treatment process to maintain the integrity of the form of the composite material, has a good recycling ability, and can be momentarily conveniently added and recovered. The composite material has the advantages of high treatment efficiency, cost reduction and effective avoiding of the secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of water treatment materials, and in particular relates to a composite material for water treatment. Background technique [0002] With the development of industry and agriculture, water bodies in many countries and regions are polluted by nitrates, leading to potential dangers such as "carcinogenic, mutagenic, and teratogenic". The pollution indicators of my country's main water systems, lakes and groundwater all contain total nitrogen, and nitrate, as an important indicator, continues to rise year after year. Since the organic carbon content in surface water or groundwater is low, it cannot meet the carbon source demand of biological denitrification and denitrification, so an additional carbon source must be added. [0003] The currently reported liquid or solid carbon sources, such as methanol, ethanol, and cellulose, all have problems such as uncontrollable dosage, low denitrification efficiency, and se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
Inventor 陈鹏陈学军凌东鹰顾群李佳灵
Owner TIANAN BIOLOGIC MATERIAL NINGBO