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Title 

Optimal strategies for bioremediation of nitrate-contaminated groundwater and microalgae biomass production

Authors 

F RezvaniM H SarrafzadehSeong Hyun SeoHee-Mock Oh

Publisher 

Springer Verlag (Germany)

Issue Date 

2018

Citation 

Environmental Science and Pollution Research

Keywords 

Biomass productionLight-dark cycleMicroalgal sizeMixed cultivationMono-cultivationNitrate-contaminated groundwater

Abstract 

Optimizing the mono-cultivation and mixed cultivation of Chlamydomonas reinhardtii, Chlorella vulgaris, and an Ettlia sp. was evaluated for treating nitrate-contaminated groundwater and biomass production. Ettlia sp. showed the highest nutrient assimilation and growth rate among the three microalgae during bioremediation. Light-dark cycle was the effective condition for nutrient removal and COD mitigation by microalgae. Mixed microalgae with a larger presence of the Ettlia sp. exhibited the highest biomass productivity, nitrate-nitrogen, and phosphate-phosphorus removal rates of 0.21 g/L/d, 16.6, and 3.06 mg/L/d, respectively. An N:P mass ratio of 5 was necessary to increase the mixed-microalgal performance. The settling efficiency of the mixed microalgae increased up to 0.55 when using pH modulation during 30 min. Therefore, applying an Ettlia sp.-dominant consortium was the optimum strategy for the bioremediation of nitrate-contaminated groundwater in 3 days.

ISSN 

0944-1344

Link 

http://dx.doi.org/10.1007/s11356-018-2777-5

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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