Journal
BIOMASS CONVERSION AND BIOREFINERY
Volume -, Issue -, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13399-021-01510-0
Keywords
Biogas residue; Biochar; Ammonia nitrogen; COD; Adsorption
Categories
Funding
- Key Research and Development Technology of Ningxia Hui Autonomous Region (special project for foreign science and technology cooperation) [2019BFH02008]
- Key Research and Development Technology of Shanxi [201903D211013]
- National Natural Science Foundation of China [21777069]
- Jiangsu Synergetic Innovation Center for Advanced Bio-Manufacture [XTE1832]
Ask authors/readers for more resources
Modified biochars prepared from biogas residues showed increased adsorption capacity for NH4+-N and COD, with the chicken manure biogas residue biochar exhibiting the highest absorption rates. FeCl3 modification further enhanced the adsorption properties, indicating potential applications for biogas slurry treatment and recycling.
Modified biochars prepared from straw, pig manure, and chicken manure biogas residues were used to adsorb and remove ammonium nitrogen (NH4+-N) and chemical oxygen demand (COD) in wastewater. The results showed that at 400-600 degrees C, the adsorption performance of the biogas residue biochars increased with pyrolysis temperature, reaching the maximum at 550 degrees C. Biochar from chicken manure biogas residue exhibited strong NH4+-N (20.3%) and COD (28.1%) adsorption capacity. Through FeCl3 modification, the Fe content on the surface of the biochar increased, and the adsorption data of the modified biochar conformed well to the pseudo-second-order kinetics and Langmuir model, and the reaction was dominated by chemical adsorption. The fitting calculation revealed that the FeCl3-modified biochar from chicken manure biogas residue showed maximum NH4+-N (55.29 mg/g) and COD (186.24 mg/g) absorption capacity. These results indicated that modified biochar from biogas residue could have potential application for the treatment and recycling of biogas slurry.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available