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Technology for deep treatment of methane fluid

An advanced treatment and process technology, applied in the field of livestock and poultry breeding waste treatment, can solve problems such as rare fertilizer processing, and achieve the effects of strong anti-pollution ability, high effluent flux and long service life

Inactive Publication Date: 2017-03-08
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reverse osmosis, ultrafiltration and nanofiltration technologies have been widely used in wastewater treatment, but rarely in fertilizer processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Special ultrafiltration-reverse osmosis combined process

[0027] The process proceeds in the following steps:

[0028] (1) Special ultrafiltration treatment: the biogas slurry is treated with special ultrafiltration technology after flocculation pretreatment, and the treatment capacity is 0.5m 3 / h, UF membrane area 10m 2 , the operating pressure is 0.3MPa, and the water is ready for use;

[0029] (2) Reverse osmosis treatment: The effluent from step (1) is treated with reverse osmosis technology, with a treatment capacity of 0.5m 3 / h, reverse osmosis membrane area 100m 2 , operating pressure 1.0MPa, effluent COD Cr ≤380mg / L, ammonia nitrogen ≤70mg / L, total phosphorus ≤7mg / L, that is, the standard has been reached.

Embodiment 2

[0030] Example 2: Special ultrafiltration-nanofiltration-reverse osmosis combined process

[0031] The process proceeds in the following steps:

[0032] (1) Special ultrafiltration treatment: the biogas slurry is treated with special ultrafiltration technology after flocculation pretreatment, and the treatment capacity is 1.5m 3 / h, ultrafiltration membrane area 25m 2 , the operating pressure is 0.2MPa, and the water is used for standby;

[0033] (2) Nanofiltration treatment: The effluent from step (1) is treated with nanofiltration technology, with a treatment capacity of 1.5m 3 / h, nanofiltration membrane area 100m 2 , the operating pressure is 0.3MPa, and the water is ready for use;

[0034] (3) Reverse osmosis treatment: The effluent from step (2) is treated with reverse osmosis technology, with a treatment capacity of 1.5m 3 / h, reverse osmosis membrane area 150m 2 , operating pressure 2.0MPa, effluent COD Cr ≤380mg / L, ammonia nitrogen ≤70mg / L, total phosphorus ≤7m...

Embodiment 3

[0035] Embodiment 3: special ultrafiltration-nanofiltration

[0036] The process proceeds in the following steps:

[0037] (1) Special ultrafiltration treatment: the biogas slurry is treated with special ultrafiltration technology after flocculation pretreatment, and the treatment capacity is 2.0m 3 / h, ultrafiltration membrane area 80m 2 , the operating pressure is 0.4MPa, and the water is used for standby;

[0038] (2) Nanofiltration treatment: The effluent from step (1) is treated with nanofiltration technology, with a treatment capacity of 2.0m 3 / h, nanofiltration membrane area 200m 2 , operating pressure 1.5MPa, effluent COD Cr ≤380mg / L, ammonia nitrogen ≤70mg / L, total phosphorus ≤7mg / L, that is, the standard has been reached.

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PUM

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Abstract

The invention discloses a technology for deep treatment of methane fluid. The technology includes two or three of the steps sequentially according to different inflowing water qualities, and the steps include (1) special ultrafiltration, (2) nanofiltration and (3) reverse osmosis treatment. According to the technology for deep treatment of the methane fluid, a special ultrafiltration membrane has the advantages such as high water outflow flux, high anti-pollution capacity and long service life as compared with the conventional organic hollow fiber ultrafiltration membrane, and is capable of effectively removing colloids and suspended particulate matter in wastewater so that organic substance content is reduced effectively; a nanofiltration treatment unit is capable of intercepting metal ions and macromolecular organic substances in the wastewater effectively; nutrient substances such as nitrogen and phosphorus and organic matter are subjected to high-magnification enrichment concentration to be further used for preparing liquid organic fertilizers; a reverse osmosis treatment unit is capable of further decreasing outflow water quantity indexes below limiting values of national discharge standards.

Description

technical field [0001] The invention relates to the treatment technology of livestock and poultry breeding waste, in particular to the advanced treatment technology of biogas slurry. Background technique [0002] Anaerobic fermentation of livestock and poultry manure will produce a large amount of biogas slurry, which is a high pollutant and cannot be directly discharged to the environment. Standardized treatment through facilities will lead to increased construction and operation costs. Therefore, the difficulty of digesting biogas slurry directly limits biogas projects. Long-term stable operation and efficient production of breeding enterprises. In view of the problems of large biogas slurry yield, low nutrient content, high processing cost, and difficult storage and transportation, biogas slurry concentration and fertilizer technology have attracted increasing attention. Biogas slurry concentration can be reused in farmland to realize its high-value utilization. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F103/20
CPCC02F1/444C02F1/441C02F1/442C02F2103/20
Inventor 肖华王云龙奚辉喻曼
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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