Algal-biochar and Chlorella vulgaris microalgae:a sustainable approach for textile wastewater treatment and biodiesel production  

作　　者：Rabia Rehman Javed Iqbal Muhammad Saif Ur Rehman Shanawar Hamid Yuze Wang Kashif Rasool Tahir Fazal 

机构地区：[1]Institute of Chemical and Environmental Engineering(ICEE),Khwaja Fareed University of Engineering and Information Technology(KFUEIT),Rahim Yar Khan 64200,Pakistan. [2]Department of Civil Engineering,Swedish College of Engineering and Technology,Rahim Yar Khan 64200,Pakistan. [3]Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China. [4]Qatar Environment and Energy Research Institute(QEERI),Hamad Bin Khalifa University,Qatar Foundation,34110 Doha,Qatar.

出　　处：《Biochar》2024年第1期1157-1172,共16页生物炭(英文)

基　　金：Open Access funding provided by the Qatar National Library(MME03-1101-210007).

摘　　要：Microalgae technology is a viable solution for environmental conservation(carbon capture and wastewater treatment)and energy production.However,the nutrient cost,slow-kinetics,and low biosorption capacity of microalgae hindered its application.To overcome them,algal-biochar(BC)can be integrated with microalgae to treat textile wastewater(TWW)due to its low cost,its ability to rapidly adsorb pollutants,and its ability to serve as a nutrient source for microalgal-growth to capture CO_(2)and biodiesel production.Chlorella vulgaris(CV)and algal-BC were combined in this work to assess microalgal growth,carbon capture,TWW bioremediation,and biodiesel production.Results showed the highest optical density(3.70±0.07 OD680),biomass productivity(42.31±0.50 mg L^(−1)d^(−1)),and dry weight biomass production(255.11±6.01 mg L^(−1))in an integrated system of CV-BC-TWW by capturing atmospheric CO_(2)(77.57±2.52 mg L^(−1)d^(−1)).More than 99%bioremediation(removal of MB-pollutant,COD,nitrates,and phosphates)of TWW was achieved in CV-BC-TWW system due to biosorption and biodegradation processes.The addition of algal-BC and CV microalgae to TWW not only enhanced the algal growth but also increased the bioremediation of TWW and biodiesel content.The highest fatty acid methylesters(biodiesel)were also produced,up to 76.79±2.01 mg g^(−1)from CV-BC-TWW cultivated-biomass.Biodiesel’s oxidative stability and low-temperature characteristics are enhanced by the presence of palmitoleic(C16:1)and linolenic(C18:3)acids.Hence,this study revealed that the integration of algal-biochar,as a biosorbent and source of nutrients,with living-microalgae offers an efficient,economical,and sustainable approach for microalgae growth,CO_(2)fixation,TWW treatment,and biodiesel production.

关 键 词：BIOREMEDIATION CO_(2)fixation Algal-biochar MICROALGAE Chlorella vulgaris Textile wastewater Biodiesel production 

分 类 号：X70[环境科学与工程—环境工程]