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Biodegradable slow-release carbon source filler and preparation method thereof

A slow-release carbon source and biodegradation technology, applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc., can solve the problems of unfavorable microbial attachment, small specific surface area, single nutrition, etc., and achieve excellent physiological inertia , Improve the specific surface area, good flexibility

Active Publication Date: 2018-04-20
湖南长宏新能源材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the slow-release carbon sources produced in the prior art are lumps with high density and small specific surface area. Although they have high mechanical strength, they are not conducive to the attachment of microorganisms, and the nutrition is relatively simple.

Method used

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  • Biodegradable slow-release carbon source filler and preparation method thereof
  • Biodegradable slow-release carbon source filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A biodegradable slow-release carbon source filler mainly includes an external carbon source layer, an internal carbon source layer and a connecting colloid, and the mass ratio of the external carbon source layer, the internal carbon source layer and the connecting colloid is: 3:1: 2. The external carbon source layer wraps the internal carbon source layer through the connecting colloid to form a multi-layer spherical structure; the internal specific surface area of ​​the multi-layer structure is large, which is conducive to the attachment of microorganisms.

[0045] The external carbon source layer mainly includes: 25% biodegradable polymer (polyvinyl alcohol), 25% starch (common starch), 3% emulsifier (fatty acid polyglycerol ester), 0.8% catalyst, 6% graphite powder, 6% iron powder, and the balance is hard water;

[0046] Wherein, the preparation method of the external carbon source layer comprises the following steps:

[0047] S1: Mix the biodegradable polymer (polyv...

Embodiment 2

[0070] A biodegradable slow-release carbon source filler mainly includes an external carbon source layer, an internal carbon source layer and a connecting colloid, and the mass ratio of the external carbon source layer, the internal carbon source layer and the connecting colloid is: 4:1: 2.5. The external carbon source layer wraps the internal carbon source layer through the connecting colloid to form a multi-layer spherical structure; the internal specific surface area of ​​the multi-layer structure is large, which is conducive to the attachment of microorganisms.

[0071] The external carbon source layer mainly includes: 28% biodegradable polymer (polyvinyl alcohol), 28% starch (expanded glutinous rice flour), 4% emulsifier (sorbitol glyceride), 1.0% catalyst, 7% graphite powder, 7% iron powder, and the balance is hard water;

[0072] Wherein, the preparation method of the external carbon source layer comprises the following steps:

[0073] S1: Mix the biodegradable polymer...

Embodiment 3

[0096] A biodegradable slow-release carbon source filler mainly includes an external carbon source layer, an internal carbon source layer and a connecting colloid, and the mass ratio of the external carbon source layer, the internal carbon source layer and the connecting colloid is: 5:1: 3. The external carbon source layer wraps the internal carbon source layer through the connecting colloid to form a multi-layer spherical structure; the internal specific surface area of ​​the multi-layer structure is large, which is conducive to the attachment of microorganisms.

[0097] The outer carbon source layer mainly includes: 30% biodegradable polymer (polycaprolactone), 30% starch (acetate starch), 5% emulsifier (sorbitol glyceride), 1.2% catalyst , 8% graphite powder, 8% iron powder, and the balance is hard water;

[0098] Wherein, the preparation method of the external carbon source layer comprises the following steps:

[0099] S1: Mix the biodegradable polymer (polycaprolactone) ...

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Abstract

The invention discloses a biodegradable slow-release carbon source filler and a preparation method thereof, and belongs to the technical field of sewage treatment. The biodegradable slow-release carbon source filler comprises an external carbon source layer, an internal carbon source layer and a connecting colloid. The external carbon source layer mainly includes a biodegradable polymer, starch, and an emulsifier; the internal carbon source layer mainly includes agar powder, oat bran powder, a microbial nutrient, xanthan gum, and trehalose; and the connecting colloid mainly includes carbon nanotubes, polyvinylpyrrolidone and methyl cellulose. Based on the traditional method of blending the starch and the biodegradable polymer as a basic system to prepare a sustained release carbon source,an external carbon source is made into powder, and an internal carbon source is wrapped by multiple layers of connecting colloid. The biodegradable slow-release carbon source filler has good mechanical strength, stable carbon release rate, and high carbon source quality, and can provide a stable carbon source and growth metabolism site for microbial denitrification.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a biodegradable slow-release carbon source filler and a preparation method thereof. Background technique [0002] Studies have shown that insufficient or unstable supply of carbon sources has become an important factor restricting the efficiency of biological nitrogen removal, and sufficient carbon sources can provide sufficient nutrient sources for the growth and metabolism of microorganisms. Therefore, solving the problem of low nitrogen removal efficiency by adding carbon sources has gradually become a research hotspot in the field of water treatment. [0003] According to research reports on carbon source supplementation, liquid carbon sources are more mature and most widely used, such as methanol, ethanol, glucose and other short-chain organic carbon, but their high cost, toxicity, uncertain dosage and transportation Difficulties and other issues have a...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/28C02F101/30C02F101/16
CPCC02F3/2806C02F3/34C02F2101/163C02F2101/30C02F2209/08C02F2209/15C02F2305/06
Inventor 骆其金周秀秀谌建宇黄荣新林方敏黎京士赖后伟刘立
Owner 湖南长宏新能源材料有限责任公司
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