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Article

Bioremediation of Raw Landfill Leachate Using Galdieria sulphuraria: An Algal-Based System for Landfill Leachate Treatment

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Department of Civil & Environmental Engineering, College of Engineering, Lamar University, Beaumont, TX 77705, USA
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Center for Advances in Water & Air Quality, College of Engineering, Lamar University, Beaumont, TX 77705, USA
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Center for Midstream Management and Science, Lamar University, Beaumont, TX 77705, USA
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Department of Municipal Engineering, College of Civil Engineering and Architecture, Anhui Polytechnic University, Wuhu 241000, China
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Wastewater & Resource Recovery Lab, Environmental Science & Engineering Department (ESED), Indian Institute of Technology Bombay, Powai, Mumbai 400076, Maharashtra, India
*
Author to whom correspondence should be addressed.
Academic Editor: Federico Aulenta
Water 2022, 14(15), 2389; https://doi.org/10.3390/w14152389
Received: 24 May 2022 / Revised: 26 July 2022 / Accepted: 30 July 2022 / Published: 1 August 2022
(This article belongs to the Section Wastewater Treatment and Reuse)
This study aims to evaluate the potential of using a thermophilic acidophilic red alga, Galdieria sulphuraria for effective on-site treatment of municipal landfill leachate (LL). This study focused on evaluating the effects of LL dilution, nitrogen loading, and initial algal biomass density on the overall treatment efficiency, and evaluated the long-term performance of the system using 5-day growth cycles. This study confirmed that optimal conditions for G. sulphuraria biomass production are 20% strength LL, a lower initial biomass concentration of 0.25 g L−1, and the addition of N at twice the level of initial media. Furthermore, the results indicated G. sulphuraria’s ability to grow in elevated NH4-N concentration (>950 mg L−1) and provide nitrogen removal rates of up to 40 mg L−1 d−1. In addition, the long-term running experiment showed that the proposed algal-based system could be applied in semi-continuous mode to achieve bioremediation. Overall, the results obtained from this study can be used to develop the necessary process parameters to implement large-scale algal-based systems for landfill leachate treatment. View Full-Text
Keywords: Galdieria sulphuraria; landfill leachate; nutrient removal; biomass production; bioremediation Galdieria sulphuraria; landfill leachate; nutrient removal; biomass production; bioremediation
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MDPI and ACS Style

Selvaratnam, T.; Pan, S.; Rahman, A.; Tan, M.; Kharel, H.L.; Agrawal, S.; Nawaz, T. Bioremediation of Raw Landfill Leachate Using Galdieria sulphuraria: An Algal-Based System for Landfill Leachate Treatment. Water 2022, 14, 2389. https://doi.org/10.3390/w14152389

AMA Style

Selvaratnam T, Pan S, Rahman A, Tan M, Kharel HL, Agrawal S, Nawaz T. Bioremediation of Raw Landfill Leachate Using Galdieria sulphuraria: An Algal-Based System for Landfill Leachate Treatment. Water. 2022; 14(15):2389. https://doi.org/10.3390/w14152389

Chicago/Turabian Style

Selvaratnam, Thinesh, Shanglei Pan, Ashiqur Rahman, Melissa Tan, Hari Lal Kharel, Saumya Agrawal, and Tabish Nawaz. 2022. "Bioremediation of Raw Landfill Leachate Using Galdieria sulphuraria: An Algal-Based System for Landfill Leachate Treatment" Water 14, no. 15: 2389. https://doi.org/10.3390/w14152389

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