Method for preparing electron donor biofilm carrier

Patent metadata

Field	Value
Publication number	US-11565957-B2
Application number	US-201816611151-A
Country	US
Kind code	B2
Filing date	Feb 5, 2018
Priority date	Feb 5, 2018
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A method for preparing an electron donor biofilm carrier includes proportioning organic polymer basic raw material and functional modifiers in a range of set-point, mixing the materials, feeding the mixtures into a screw extruder, processing them into a bar-type material, and then cut the bar-type material into granules with the cutting machine, and feeding the granules into the screw extruder, processing them into pipes of various shapes according to the selected screw extruder heads, and then cutting the pipes according to the required size. The electron donor biofilm carrier is mainly used in anaerobic or anoxic suspended carrier biofilm technologies. Electron donors with a standard electrode potential below 100 Mv are used as the functional material for preparation of electron donor biofilm carrier.

First claim

The invention claimed is:

1. A method for preparing an electron donor biofilm carrier, the electron donor biofilm carrier comprising an organic polymer basic raw material and functional modifiers, wherein the organic polymer basic raw material is polyethylene or polypropylene, wherein the functional modifiers are electron donors that have an electrode potential below 100 mV, wherein grain sizes of the functional modifiers are more than 200 meshes, and wherein a mass fraction ratio of the functional modifiers and the organic polymer basic raw material is 0.5-15:100, the method comprising:
proportioning the organic polymer basic raw material and the functional modifiers in a range of set-point;
mixing the organic polymer basic raw material and the functional modifiers fully in a mixing container to obtain a mixture;
feeding the mixture into a screw extruder, processing the mixture into a bar, and then cutting the bar into granules with a cutting machine, during said processing the mixture into the bar, a setting temperature of a first barrel zone, a second barrel zone, a third barrel zone and a head zone is 160° C., 170° C., 180° C. and 160° C., respectively; and
feeding the granules into the screw extruder, processing the granules into pipes of various shapes according to selected screw extruder heads, and then cutting the pipes according to a predetermined size, during said processing the granules into pipes, a setting temperature of a first barrel zone, a second barrel zone, a third barrel zone and a head zone is 135° C., 160° C., 180° C. and 155° C., respectively,
wherein the pipes extruded from the screw extruder are shaped by a vacuum setting sleeve with a vacuum degree of 0.03 MPa.

2. A method for preparing an electron donor biofilm carrier, the electron donor biofilm carrier comprising an organic polymer basic raw material, functional modifiers and excipients, wherein the organic polymer basic raw material is polyethylene or polypropylene, the functional modifiers are electron donors that have an electrode potential below 100 mV, grain sizes of the functional modifiers are more than 200 meshes, and a mass fraction ratio of the functional modifiers and the organic polymer basic raw material is 0.5-15:100, wherein the excipients are polyquaternary ammonium salt-10 and talc, wherein a grain size of the polyquaternary ammonium salt-10 is more than 100 meshes, wherein a grain size of the talc is more than 200 meshes, wherein a mass fraction ratio of the polyquaternary ammonium salt-10, the talc and the organic polymer basic raw material is 0.5-6:0.5-4:100, the method comprising:
proportioning the organic polymer basic raw material, the functional modifiers and the excipients in a range of set-point;
mixing the organic polymer basic raw material, the functional modifiers and the excipients fully in a mixing container to obtain a mixture;
feeding the mixture into a screw extruder, processing the mixture into a bar, and then cutting the bar into granules with a cutting machine, during said processing the mixture into the bar, a setting temperature of a first barrel zone, a second barrel zone, a third barrel zone and a head zone is 160° C., 170° C., 180° C. and 160° C., respectively; and
feeding the granules into the screw extruder, processing the granules into pipes of various shapes according to selected screw extruder heads, and then cutting the pipes according to a predetermined size, during said processing the granules into pipes, a setting temperature of a first barrel zone, a second barrel zone, a third barrel zone and a head zone is 135° C., 160° C., 180° C. and 155° C., respectively,
wherein the pipes extruded from the screw extruder are shaped by a vacuum setting sleeve with a vacuum degree of 0.03 MPa.

3. An electron donor biofilm carrier, comprising:
an organic polymer basic raw material; and
functional modifiers,
wherein the organic polymer basic raw material is polyethylene or polypropylene,
wherein the functional modifiers are electron donors that have an electrode potential below 100 mV,
wherein grain sizes of the functional modifiers are more than 200 meshes, and
wherein a mass fraction ratio of the functional modifiers and the organic polymer basic raw material is 0.5-15:100, the electron donor biofilm carrier being formed by a method comprising:
proportioning the organic polymer basic raw material and the functional modifiers in a range of set-point;
mixing the organic polymer basic raw material and the functional modifiers fully in a mixing container to obtain a mixture;
feeding the mixture into a screw extruder, processing the mixture into a bar, and then cutting the bar into granules with a cutting machine, during said processing the mixture into the bar, a setting temperature of a first barrel zone, a second barrel zone, a third barrel zone and a head zone is 160° C., 170° C., 180° C. and 160° C., respectively; and
feeding the granules into the screw extruder, processing the granules into pipes of various shapes according to selected screw extruder heads, and then cutting the pipes according to a predetermined size, during said processing the granules into pipes, a setting temperature of a first barrel zone, a second barrel zone, a third barrel zone and a head zone is 135° C., 160° C., 180° C. and 155° C., respectively,
wherein the pipes extruded from the screw extruder are shaped by a vacuum setting sleeve with a vacuum degree of 0.03 MPa.

4. The electron donor biofilm carrier according to claim 3 , wherein the electron donor biofilm carrier further comprises excipients,
wherein the excipients are polyquaternary ammonium salt-10 and talc,
wherein a grain size of the polyquaternary ammonium salt-10 is more than 100 meshes, and
wherein a grain size of the talc is more than 200 meshes; a mass fraction ratio of the polyquaternary ammonium salt-10, the talc and the organic polymer basic raw material is 0.5-6:0.5-4:100.

Assignees

• Univ Dalian Tech

Inventors

• Quan Xie
• Shi Yanping
• Chen Shuo
• Zhang Yaobin
• Liu Tao

Classifications

• C02F3/2806 Primary

  Anaerobic processes using solid supports for microorganisms · CPC title

• B29K2023/06

  PE, i.e. polyethylene · CPC title

• B29K2023/12

  PP, i.e. polypropylene · CPC title

• B29C48/0022

  combined with cutting · CPC title

• C02F2203/006

  details of construction, e.g. specially adapted seals, modules, connections · CPC title