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Biogas slurry filtration column and use thereof

A filter column and biogas slurry technology, applied in the field of environmental engineering, can solve problems such as high suspended solids and blockage, achieve the effects of saving water resources, prolonging effective operating time, and ensuring long-term stable operation

Active Publication Date: 2015-02-04
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a biogas slurry filter column and its application. The present invention solves the problem of high suspended matter in the biogas slurry, which is easy to cause blockage in the process of drip irrigation and membrane concentration; and the filter material in the biogas slurry filter column does not need Repeated washing, the used filter material can be recycled

Method used

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  • Biogas slurry filtration column and use thereof
  • Biogas slurry filtration column and use thereof
  • Biogas slurry filtration column and use thereof

Examples

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Effect test

Embodiment 1

[0032] Example 1. Biogas slurry filter column filled with single-size corn stalks and its application

[0033] 1. Preparation of biogas slurry filter column filled with single particle size corn stalks

[0034] Pretreatment of corn stalks:

[0035] Take naturally air-dried corn stalks with a mass moisture content of 9%, and pulverize them into small pieces of 45-50 mm with a small grinder with a pitch of 50 mm between toothed rollers, and sieve out granular corn stalks with a particle size of less than 50 mm.

[0036] Preparation of biogas slurry filter column:

[0037] The prepared granular corn stalks were loaded into a stainless steel filter column with an inner diameter of 10 cm and a height of 100 cm. Fill the corn stalks directly into the filter column, the filling height is 85cm, at this time, the bulk density of the corn stalks in the filter column is 0.1628g·cm -3 .

[0038] The biogas slurry filter column prepared above is connected to figure 1 In the schematic ...

Embodiment 2

[0047] Example 2, the filter column packed with multi-stage particle size corn stalks and its application

[0048] 1. Preparation of biogas slurry filter column filled with multi-stage particle size corn stalks

[0049] Pretreatment of corn stalks:

[0050] Take naturally air-dried corn stalks, the mass moisture content of which is 9%. First, use a small pulverizer with a toothed roller spacing of 50 mm to pulverize it into small sections of 45 to 50 mm, and then sieve it with a sieve with an aperture of 50 mm. The straw filter material with a coarse particle size (50mm) is used for standby, and the undersieve is crushed to a smaller particle size of 15-20mm by a grinder with a toothed roller spacing of 20mm; The powdered corn stalks are sieved out, and the sieve is used as straw filter material with a fine particle size (20mm) for later use.

[0051] Preparation of biogas slurry filter column:

[0052] The prepared corn stalks with two particle sizes were loaded into a sta...

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Abstract

The invention discloses a biogas slurry filtration column and use thereof. The biogas slurry filtration column includes a column body and corn stalk filled in the column body; and the corn stalk diameter is 20mm-100mm. A biogas slurry filtration method comprises the following steps: flowing to-be-filtered biogas slurry through at least one biogas slurry filtration columns, and collecting filtrate at biogas slurry filtration column outlets for realization of the biogas slurry filtration. The biogas slurry filtration columns or the corn stalk is used in biogas slurry filtration. The invention has the following advantages: the corn stalk is cheap and easy to get, the first recycling of the corn stalk is realized; after biogas slurry filtration, the corn stalk needs no washing, the water resource is saved, waste corn stalk can be directly used for aerobic composting to achieve the second recycling of the corn stalk; the problems that the biogas slurry is high in suspended matters and clogging is easy to cause in the drip irrigation and film concentration treatment process can be solved, the filtering process is purely physical filtration, original various nutrients in the biogas slurry can be greatly kept, and long-term stable operation of the treatment means can be ensured.

Description

technical field [0001] The invention relates to a biogas slurry filter column and its application, belonging to the field of environmental engineering. Background technique [0002] With the rapid development of large-scale livestock and poultry breeding industry, how to deal with livestock and poultry manure is particularly important. As a treatment method, biogas engineering is widely used because it can produce clean energy gas through fermentation. But at the same time, a large amount of residual liquid after fermentation - biogas slurry is also produced. Biogas slurry is rich in nutrients needed for crop growth, including nitrogen, phosphorus, potassium and other macro elements, iron, boron, molybdenum, magnesium and other trace elements, and rich in various amino acids, proteins, vitamins, and various enzymes , plant growth hormones and substances that resist stress and pests. Therefore, biogas slurry is a very good organic fertilizer, and a large number of research...

Claims

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Application Information

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IPC IPC(8): B01D24/10C05F3/06
CPCY02A40/20Y02E50/30Y02W30/40
Inventor 李国学张智烨袁京杜龙龙
Owner CHINA AGRI UNIV
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