Format

Send to

Choose Destination
Bioresour Technol. 2016 Nov;219:757-761. doi: 10.1016/j.biortech.2016.08.044. Epub 2016 Aug 12.

Intensified nitrogen removal of constructed wetland by novel integration of high rate algal pond biotechnology.

Author information

1
College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China; College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China.
2
College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China.
3
College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China.
4
College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China. Electronic address: yhwang@dhu.edu.cn.
5
Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, USA.

Abstract

High rate algal pond (HRAP) was combined with constructed wetland (CW) to intensify nitrogen removal through optimizing nitrification and denitrification. Nitrification and denitrification process mainly depends on the oxygen content and carbon source level in CWs. Algal biomass was enriched in HRAP, and dissolved oxygen (DO) concentration was increased via photosynthesis. Algal debris increased COD as degradable bioresource. The results showed that HRAP-CW hybrid systems effectively promoted the nitrogen removal performance due to rich DO and COD. The extension of hydraulic retention time in HRAP significantly improved NH4-N and TN removals by 10.9% and 11.1% in hybrid systems, respectively. The highest NH4-N and TN removals in hybrid systems respectively reached 67.2% and 63.5%, which were significantly higher than those in single CW. The study suggested that the hybrid system had the application potentials in nitrogen removal from wastewater.

KEYWORDS:

Algal carbon source; Constructed wetland; High rate algal pond; Nitrogen removal; Photosynthetic aeration

PMID:
27544265
DOI:
10.1016/j.biortech.2016.08.044
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center