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Title:
METHOD AND DEVICE FOR CYCLICALLY TREATING FARMING WASTEWATER AND/OR IMPROVING SOIL BY UTILIZING LIVESTOCK AND POULTRY MANURE
Document Type and Number:
WIPO Patent Application WO/2021/189791
Kind Code:
A1
Abstract:
Disclosed are a method and device for cyclically treating farming wastewater and/or improving soil by utilizing livestock and poultry manure. The method comprises the steps of: adding a conditioner into livestock and poultry manure for mixing and conditioning; then pre-drying and dehydrating same at a low temperature to reduce the moisture content to less than 10 percent to obtain dried livestock and poultry manure, then indirectly heating the livestock and poultry manure in a pyrolysis and carbonization device, then indirectly cooling the obtained bio-charcoal powder, and adding the obtained cooled bio-charcoal into farming wastewater. The present invention can be used for preparing bio-charcoal particles, which can be directly used for soil improvement; or is used for the deep adsorption and purification of farming wastewater before tail water thereof is discharged. Some COD, ammonia nitrogen, phosphorus and other effective elements and antibiotics and other micropollutants can be removed, and the biochemical treatment load of the farming wastewater is reduced. By means of the method and device, pollution caused by simple composting of livestock and poultry manure is avoided, comprehensive treatment of farming waste is fully achieved, and good social benefits, economic benefits and environmental benefits are achieved.

Inventors:
YU GUANGWEI (CN)
WANG YIN (CN)
ZHU YONGGUAN (CN)
Application Number:
PCT/CN2020/117593
Publication Date:
September 30, 2021
Filing Date:
September 25, 2020
Export Citation:
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Assignee:
INST URBAN ENVIRONMENT CAS (CN)
International Classes:
C02F11/143; B01J20/20; C02F9/02; C02F11/10; C02F11/13
Foreign References:
CN111423096A2020-07-17
CN103951149A2014-07-30
CN109879576A2019-06-14
CN110240386A2019-09-17
CN105418171A2016-03-23
US20170362135A12017-12-21
Attorney, Agent or Firm:
XIAMEN JINGCHENGXINCHUANG INTELLECTUAL PROPERTY AGENCY CO. LTD. (CN)
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