Preparation and application of in-situ high efficient degradation carbon based materials of VOCs in landfill based on waste recycling

US11491444B2 · kind B2 · utility

Assignee

• Institute of Rock and Soil Mechanics, Chinese Academy of Sciences · CN

Inventors

• Yong Wan · Beijing, CN
• Lei Liu · Thousand Oaks, US
• Linbo Qin · 红钢城街道, CN
• Jiangshan Li · 红钢城街道, CN
• Yijun Chen · Madison, US

Key dates

• Filing date: Jan 21, 2020
• Grant date: Nov 8, 2022
• Expiry date: Apr 8, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2258/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention discloses a preparation method and application of in-situ high-efficiency degradation carbon based material of VOCs in landfill based on waste regeneration, which comprises the following steps: air drying the agricultural and forestry wastes to a moisture content of 0.001 wt %˜20 wt %, and the agricultural and forestry wastes mainly include: straw, wheat straw, leaves, branches, weeds, crushing them to a particle size of 0-50 mm with a grinder, and then using urea or amide as modifier The nitrogen enriched biochar was prepared by mixing the crushed agricultural and forestry wastes with a mass ratio of 1:50-1:10; the nitrogen enriched biochar was prepared by retorting the nitrogen doped agricultural and forestry wastes at 300-600° C. for 20-60 min, and then cooling them rapidly; the nitrogen enriched biochar was mixed with the sewage sludge with a moisture content of 90-98 wt. % with a weight ratio of 20:1-10:1 to get the nitrogen enriched microorganism The degradation efficiency of TVOCs in landfill is 96.74%˜99.70%.