Title:
METHOD FOR IMPROVING ALKALINE SOIL AND ENHANCING CARBON CAPTURE BY USING SLUDGE STABILIZATION PRODUCT
Document Type and Number:
WIPO Patent Application WO/2023/222070
Kind Code:
A1
Abstract:
The present invention relates to a method for improving an alkaline soil and enhancing carbon capture by using a sludge stabilization product. The method comprises the following steps: (1) performing aerobic composting on sludge to obtain a stabilization product A; (2) using a part of the stabilization product A to extract a humus B, using the remaining part of the stabilization product A to hydrothermally extract a dissolved organic matter rich in amino acids and organic salts, and obtaining a mixture C after distilling to dryness; (3) performing pyrolysis on residues obtained in the process of extracting the humus B and the mixture C to prepare biochar D rich in metal oxides; (4) fully mixing the stabilization product A, the humus B, the mixture C, and the biochar D to obtain a soil conditioner E; and (5) applying the soil conditioner E to an alkaline soil surface layer, and planting plants. Compared with the prior art, the present invention can synchronously implement sludge recycling, alkaline soil improvement, and carbon capture enhancement, has no secondary pollution, avoids soil erosion, and has a long-lasting carbon capture function.
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Inventors:
DONG BIN (CN)
CHEN SISI (CN)
GAO JUN (CN)
XU ZUXIN (CN)
CHEN SISI (CN)
GAO JUN (CN)
XU ZUXIN (CN)
Application Number:
PCT/CN2023/094963
Publication Date:
November 23, 2023
Filing Date:
May 18, 2023
Export Citation:
Assignee:
UNIV TONGJI (CN)
International Classes:
C09K17/40; B09C1/08; C05G3/80
Foreign References:
| CN114920608A | 2022-08-19 | |||
| CN103539511A | 2014-01-29 | |||
| CN101684050A | 2010-03-31 | |||
| CN111908756A | 2020-11-10 | |||
| CN104973990A | 2015-10-14 | |||
| CN111687195A | 2020-09-22 | |||
| CN107382603A | 2017-11-24 | |||
| JP2005060608A | 2005-03-10 | |||
| JP2012139108A | 2012-07-26 |
Other References:
MEI XIAOJIE, TANG JIANGUO, ZHANG YUE: "Transformation mechanism of the sludge stabilization process and the products value in municipal wastewater treatment plant", WATER ＆ WASTEWATER ENGINEERING., vol. 54, no. 11, 1 November 2018 (2018-11-01), pages 11 - 19, XP093109332, DOI: 10.13789/j.cnki.wwe1964.2018.0436
DONG ZHIWEI, ZUO NING, WANG YAN, ZHOU YUWEI, CHEN FANGYUAN: "Research progress in chemical properties and environmental effects of pyrolysis sludge biochar", ENVIRONMENTAL POLLUTION ＆ CONTROL., vol. 41, no. 4, 1 April 2019 (2019-04-01), pages 479 - 484, XP093109335, DOI: 10.15985/j.cnki.1001-3865.2019.04.021
LIU HONGTAO; GUO XIAOXIA; LIU XIAOJIE; LEI MEI: "Long-Term Effect of Sludge Compost Amendment on the Temporal Pattern of Nitrogen Supply in Its Amended Soil", WASTE AND BIOMASS VALORIZATION, SPRINGER NETHERLANDS, NL, vol. 11, no. 5, 31 October 2018 (2018-10-31), NL , pages 1953 - 1959, XP037082293, ISSN: 1877-2641, DOI: 10.1007/s12649-018-0491-7
DONG ZHIWEI, ZUO NING, WANG YAN, ZHOU YUWEI, CHEN FANGYUAN: "Research progress in chemical properties and environmental effects of pyrolysis sludge biochar", ENVIRONMENTAL POLLUTION ＆ CONTROL., vol. 41, no. 4, 1 April 2019 (2019-04-01), pages 479 - 484, XP093109335, DOI: 10.15985/j.cnki.1001-3865.2019.04.021
LIU HONGTAO; GUO XIAOXIA; LIU XIAOJIE; LEI MEI: "Long-Term Effect of Sludge Compost Amendment on the Temporal Pattern of Nitrogen Supply in Its Amended Soil", WASTE AND BIOMASS VALORIZATION, SPRINGER NETHERLANDS, NL, vol. 11, no. 5, 31 October 2018 (2018-10-31), NL , pages 1953 - 1959, XP037082293, ISSN: 1877-2641, DOI: 10.1007/s12649-018-0491-7
Attorney, Agent or Firm:
BEIJING FINELAND IP FIRM (CN)
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