Feasibility of algal systems for sustainable wastewater treatment

RENEWABLE ENERGY

卷:82

Article; Proceedings Paper

Selvaratnam, Thinesh¹  Pegallapati, Ambica²  Montelya, Felly¹  Rodriguez, Gabriela¹  Nirmalakhandan, Nagamany¹  Lammers, Peter J.³  van Voorhies, Wayne⁴ 

[1] New Mexico State Univ, Dept Civil Engn, Las Cruces, NM 88003 USA

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] New Mexico State Univ, Energy Res Lab, Las Cruces, NM 88003 USA

[4] New Mexico State Univ, Dept Biochem, Las Cruces, NM 88003 USA

关键词: Algal wastewater treatment;    Nitrogen removal;    Phosphate removal;    Galdieria sulphuraria;    Thermo-tolerant acidophilic strains;   

DOI  :  10.1016/j.renene.2014.07.061

来源: Elsevier

【 摘 要 】

This paper proposes cultivation of algae in urban wastewaters as a sustainable approach for removing the nutrients from the wastewaters and generating energy from the biomass. The theoretical rationale of this proposal is that, the algal systems can produce nearly double the biomass per unit nutrient intake than bacterial systems and can generate nearly 20% more net energy. Preliminary experimental results are presented to demonstrate that a therrno-tolerant and acidophilic algal strain evaluated in this study-Galdieria sulphuraria, can grow well in primary settled urban wastewaters and can reduce nutrient levels to regulatory discharge levels at reasonable rates. Nutrient removal rgtes found in this study (4.70 -5.0 mg L(-1)d(-1) of nitrogen and 1.5-1.7 mg L(-1)d(-1) of phosphate) are comparable to those by traditional methods. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free