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Blend containing PHBV and rice husks, and preparation method and use thereof

A blend, rice husk technology, applied in chemical instruments and methods, biological water/sewage treatment, special compound water treatment, etc., can solve the problem of no rice husk application, achieve excellent biodegradation performance, and improve technical practicability , the effect of reducing manufacturing costs

Inactive Publication Date: 2018-04-20
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing technologies disclosed in these three patents all use rice husks for adsorption, specifically for the adsorption of heavy metals such as lead, etc., and there is no product that uses rice husks for solid-phase denitrification of wastewater. middle

Method used

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  • Blend containing PHBV and rice husks, and preparation method and use thereof
  • Blend containing PHBV and rice husks, and preparation method and use thereof
  • Blend containing PHBV and rice husks, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of blend, comprises:

[0036] The PHBV (molecular weight 50000) of 32 weight parts, the rice husk (particle diameter 120 μm) of 35 weight parts, the water of 2 weight parts and the KH-550 of 1 weight part are put into the reactor and stirred; Extrude and granulate at 175°C in the extruder to obtain a blend.

Embodiment 2

[0038] The preparation method of blend, comprises:

[0039] Put 45 parts by weight of PHBV (molecular weight 80000), 33 parts by weight of rice husk (150 μm in particle size), 5 parts by weight of water and 2 parts by weight of KH-560 into the reactor and stir evenly, then add to the twin-screw extruder Extrude and granulate at 172°C in the extruder to obtain a blend.

Embodiment 3

[0041] The preparation method of blend, comprises:

[0042] Put 40 parts by weight of PHBV (molecular weight 70000), 45 parts by weight of rice husk (150 μm in particle size), 2 parts by weight of water and 3 parts by weight of KH-570 into the reactor and stir evenly, then add to the twin-screw extruder Extrude and granulate at 175°C in the extruder to obtain a blend.

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Abstract

The invention discloses a blend containing PHBV and rice husks, and a preparation method and a use thereof. The blend contains a PHBV polymer, the rice husks, water and a silane coupling agent. The preparation method of the blend comprises the following steps: uniformly stirring the PHBV, rice husks, water, and the silane coupling agent, and carrying out extrusion granulation on the obtained mixture to obtain the blend. The blend can be used as a solid carbon source and a biofilm carrier to reduce the industrial production cost of the solid carbon source, solve the economic bottleneck of a solid phase denitrification technology, overcome the problem of difficulty in control of the addition amount of a traditional liquid carbon source in the denitrification process and shorten the start-uptime of the solid denitrification technology, and can be used in the denitrification of low-carbon-to-nitrogen ratio sewage.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a blend containing PHBV and rice husk, a preparation method and application thereof. Background technique [0002] Point source pollution such as tail water of sewage treatment plants and non-point source pollution such as agricultural wastewater through surface confluence have caused my country's surface water, mainly nitrate, to exceed the standard of nitrogen, which has become a prominent problem faced by the water treatment industry. At the same time, nitrate is the main The content of pollution indicators in the groundwater of the country is relatively prominent, and has a rising trend year after year. Nitrate nitrogen is mainly removed by microbial denitrification, but the content of organic matter in point source pollution such as tail water of sewage treatment plants and non-point source pollution of agricultural wastewater is not enough to provide sufficient ca...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L1/02C08K5/544C08K5/5425C08K5/5435C02F3/34C02F3/28
CPCC02F3/28C02F3/34C02F2305/06C08L67/04C08L2201/06C08L1/02C08K5/544C08K5/5435C08K5/5425
Inventor 吴为中孙海盟杨忠臣
Owner PEKING UNIV
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