processes Review A Review of Landfill Leachate Treatment by Microalgae: Current Status and Future Directions Tabish Nawaz 1,2, Ashiqur Rahman 3,4 , Shanglei Pan 1,5, Kyleigh Dixon 5, Burgandy Petri 5 and Thinesh Selvaratnam 1,3,5,* 1 Center for Advances in Water & Air Quality, Lamar University, 4400 S M L King Jr Pkwy, Beaumont, TX 77705, USA;
[email protected] (T.N.);
[email protected] (S.P.) 2 Environmental Science and Engineering Department, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India 3 Center for Midstream Management and Science, Lamar University, 4400 S M L King Jr Pkwy, Beaumont, TX 77705, USA;
[email protected] 4 Department of Chemical Engineering, Lamar University, 4400 S M L King Jr Pkwy, Beaumont, TX 77705, USA 5 Department of Civil & Environmental Engineering, Lamar University, 4400 S M L King Jr Pkwy, Beaumont, TX 77705, USA;
[email protected] (K.D.);
[email protected] (B.P.) * Correspondence:
[email protected]; Tel.: +1-409-880-8712 Received: 28 February 2020; Accepted: 19 March 2020; Published: 26 March 2020 Abstract: Solid waste generation has been projected to increase worldwide. Presently, the most applied methodology to dispose of solid waste is landfilling. However, these landfill sites, over time release a significant quantity of leachate, which can pose serious environmental issues, including contamination of water resources. There exist many physicochemical and biological landfill leachate treatment schemes with varying degrees of success. With an increasing focus on sustainability, there has been a demand for developing eco-friendly, green treatment schemes for landfill leachates with viable resource recovery and minimum environmental footprints.