ELECTRON DONOR BIOFILM CARRIER AND PREPARATION METHOD THEREOF

Abstract

The present disclosure provides an electron donor biofilm carrier and preparation method thereof. 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 My are used as the functional material for preparation of electron donorbiofilm carrier. The electron donor biofilm carrier may contribute to the enrichment of the biofilm functional bacteria and the improvement on treatment performance of the anaerobic or anoxic suspended carrier biofilm reactor.

Claims

1. An electron donor biofilm carrier, wherein comprising an organic polymer basic raw material and functional modifiers; wherein the organic polymer basic raw material is polyethylene or polypropylene, the functional modifiers are electron donors that have a standard electrode potential below 100 mV, the grain sizes of the functional modifiers are more than 200 meshes, and the mass fraction ratio of functional modifiers and organic polymer basic raw material is 0.5-15:100.

2. The electron donor biofilm carrier according to claim 1, wherein the electron donor biofilm carrier further comprises excipients, the excipients are polyquaternary ammonium salt-10 and talc; wherein the polyquaternary ammonium salt-10 can improve the eletrophilicity and hydrophilicity of biofilm carrier, the grain size of the polyquaternary ammonium salt-10 is more than 100 meshes, the talc can enhance the tensile toughness of the organic polymer basic raw material, which makes melt flow or extrusion easily, the grain size of the talc is more than 200 meshes; the mass fraction ratio of polyquaternary ammonium salt-10, talc and organic polymer basic raw material is 0.5-6:0.5-4:100.

3. A method for preparing the electron donor biofilm carrier of claim 1, wherein, comprising the following steps: step 1: organic polymer basic raw material and functional modifiers are proportioned in the range of set-point; step 2: mix the materials of the step 1 fully in a mixing container; step 3: mixtures of the step 2 are fed into the screw extruder and processed into bar-type material, then cut the bar-type material into granules with the cutting machine; step 4: granules of the step 3 are fed into the screw extruder and processed into pipes of various shapes according to the selected screw extruder heads, then cut the pipes according to the required size; in the extrusion process, the setting temperature of each barrel zone of the screw extruder is 120-250 C.

4. A method for preparing the electron donor biofilm carrier of claim 2, wherein, comprising the following steps: step 1: organic polymer basic raw material, functional modifiers and excipients are proportioned in the range of set-point; step 2: mix the materials of the step 1 fully in a mixing container; step 3: mixtures of the step 2 are fed into the screw extruder and processed into bar-type material, then cut the bar-type material into granules with the cutting machine; step 4: granules of the step 3 are fed into the screw extruder and processed into pipes of various shapes according to the selected screw extruder heads, then cut the pipes according to the required size; in the extrusion process, the setting temperature of each barrel zone of the screw extruder is 120-250 C.

Description

DETAILED DESCRIPTION

[0017] Detailed embodiments of the present invention are described below in conjunction with the technical solutions.

Embodiment 1

[0018] 200 g extrusion-grade high density polyethylene (HDPE) powder as the basic raw material, 2 g zero-valent zinc as the functional modifier, 4 g PQAS-10 and 2 g talc as the excipients were added in the sealed container in turn. After mix them fully, the mixtures as raw-material 1. The raw-material 1 was fed into the screw extruder and processed into bar-type material. In the extrusion process, the setting temperature of the screw extruder's barrel zone 1, barrel zone 2, barrel zone 3 and head zone were160 C., 170 C., 180 C. and 160 C. respectively. The bar-type material extruded from the extruder head was cooled with an air cooling system and cut into granules (called raw-material 2) with the cutting machine. The raw-material 2 was fed into the screw extruder and processed into pipes. In the extrusion process, the setting temperature of the screw extruder's barrel zone 1, barrel zone 2, barrel zone 3 and headzone were 135 C., 160 C., 180 C. and 155 C. respectively. The pipes extruded from the extruder head were shaped and sized by a vacuum setting sleeve with vacuum degree of 0.03 MPa and cooled with a water cooling system. At last, the pipes were cut according to the required size. The end product is the electron donor biofilm carrier.

Embodiment 2

[0019] 200 g extrusion-grade HDPE powder as the basic raw material, 4 g zero-valent zinc as the functional modifier, 4 g PQAS-10 and 2 g talc as the excipients were added in the sealed container in turn. After mix them fully, the mixtures as raw-material 1. The raw-material 1 was fed into the screw extruder and processed into bar-type material. In the extrusion process, the setting temperature of the screw extruder's barrel zone 1, barrel zone 2, barrel zone 3 and headzone were 160 C., 170 C., 180 C. and 160 C. respectively. The bar-type material extruded from the extruder head was cooled with an air cooling system and cut into granules (called raw-material 2) with the cutting machine. The raw-material 2 was fed into the screw extruder and processed into pipes. In the extrusion process, the setting temperature of the screw extruder's barrel zone 1, barrel zone 2, barrel zone 3 and head zone were 135 C., 160 C., 180 C. and 155 C. respectively. The pipes extruded from the extruder head were shaped and sized by a vacuum setting sleeve with vacuum degree of 0.03 MPa and cooled with a water cooling system. At last, the pipes were cut according to the required size. The end product is the electron donor biofilm carrier.

Embodiment 3

[0020] 200 g extrusion-grade HDPE powder as the basic raw material, 2 g sodium sulfide as the functional modifier, 4 g PQAS-10 and 2 g talc as the excipients were added in the sealed container in turn. After mix them fully, the mixtures as raw-material 1. The raw-material 1 was fed into the screw extruder and processed into bar-type material. In the extrusion process, the setting temperature of the screw extruder's barrel zone 1, barrel zone 2, barrel zone 3 and headzonewere 160 C., 170 C., 180 C. and 160 C. respectively. The bar-type material extruded from the extruder head was cooled with an air cooling system and cut into granules (called raw-material 2) with the cutting machine. The raw-material 2 was fed into the screw extruder and processed into pipes. In the extrusion process, the setting temperature of the screw extruder's barrel zone 1, barrel zone 2, barrel zone 3 and head zone were 135 C., 160 C., 180 C. and 155 C. respectively. The pipes extruded from the extruder head were shaped and sized by a vacuum setting sleeve with vacuum degree of 0.03 MPa and cooled with a water cooling system. At last, the pipes were cut according to the required size. The end product is the electron donor biofilm carrier.

Embodiment 4

[0021] 200 g extrusion-grade HDPE powder as the basic raw material, 4 g pyruvate as the functional modifier, 4 g PQAS-10 and 2 g talc as the excipients were added in the sealed container in turn. After mix them fully, the mixtures as raw-material 1. The raw-material 1 was fed into the screw extruder and processed into bar-type material. In the extrusion process, the setting temperature of the screw extruder's barrel zone 1, barrel zone 2, barrel zone 3 and headzone were 160 C., 170 C., 180 C. and 160 C. respectively. The bar-type material extruded from the extruder head was cooled with an air cooling system and cut into granules (called raw-material 2) with the cutting machine. The raw-material 2 was fed into the screw extruder and processed into pipes. In the extrusion process, the setting temperature of the screw extruder's barrel zone 1, barrel zone 2, barrel zone 3 and head zone were 135 C., 160 C., 180 C. and 155 C. respectively. The pipes extruded from the extruder head were shaped and sized by a vacuum setting sleeve with vacuum degree of 0.03 MPa and cooled with a water cooling system. At last, the pipes were cut according to the required size. The end product was the electron donor biofilm carrier.