Work

Heterotrophic Denitrification of Nitrate-Contaminated Water Using Different Solid Carbon Sources

Year: 2011

Type: article

Abstract: Biodegradability and COD release of polylactic acid (PLA), polycaprolactone (PCL) and polylactic acid/Poly (3- hydroxybutyrate-co-3-hydroxyvalerate) blend (PLA/PHBV) were determined in water solution with sludge as the inoculum, and the feasibility of using them as carbon sources to remove nitrate from nitrate-contaminated water was also investigated. The experimental results indicate that PLA/PHBV is degraded more rapidly and easily than PLA and PCL. PLA is difficult to be degraded in water solution, so it is unsuitable to be used as carbon source for denitrification. Average denitrification rates supported by PCL and PLA/PHBV were 6.34 and 6.63 mg L-1 h-1 with 7 h HRT under a batch system, respectively. Nitrite was not detected in the treated water after 9-hour operation.

Source: Procedia Environmental Sciences

DOI: 10.1016/j.proenv.2011.09.013

Authors: Ying Xu, Tian-Lei Qiu, Mei-Lin Han, Jun Li, Xu-Ming Wang

Institutions: Shenyang Agricultural University, Beijing Academy of Agriculture and Forestry Sciences

Language: English

Topic: Wastewater Treatment and Nitrogen Removal

Subfield: Pollution

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: diamond

Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation