Simultaneous improvements on nutrient and Mg recoveries of microalgal bioremediation for municipal wastewater and nickel laterite ore wastewater.
Effects of different mixing ratios between synthetic municipal wastewater (MW) and magnesium (Mg2+)-enriched nickel laterite ore wastewater (NLOWW) on growth of Chlorella sorokiniana (C. sorokiniana), photosynthetic activities, cellular biocomposition, nutrient and Mg2+ removal were investigated in photobioreactors. In the culture without NLOWW, wrinkled cells were observed with low biomass production. The culture mixed with 0.13% NLOWW obtained 1.89-fold higher biomass yield, 3.77-fold enhanced photosynthetic activity (Fv/Fm value), and improved nutrient removal (nitrogen by 102.2%, phosphorus by 39.3%). However, excessive Mg2+ at 100% NLOWW produced highest reactive oxygen species suppressing microalgal growth. The Mg2+ removal capacity increased with NLOWW loading. Moreover, microalgal assimilation primarily contributed to nutrient removal while absorption was the dominant Mg2+ removal pathway. Carbohydrate content in biomass increased with Mg2+ loading. Finally, the approach for MW/NLOWW treatment was demonstrated as economically feasible with revenue of $75.6 per kilogram biomass through a comprehensive economic model.
['Chen|Zhipeng|Z|', 'Qiu|Shuang|S|', 'Amadu|Ayesha Algade|AA|', 'Shen|Yeting|Y|', 'Wang|Lingfeng|L|', 'Wu|Zhengshuai|Z|', 'Ge|Shijian|S|']
D001673:Biodegradation, Environmental D018533:Biomass D002708:Chlorella D058086:Microalgae D009532:Nickel D009584:Nitrogen D000078622:Nutrients D010758:Phosphorus D062065:Waste Water
Wastewater Magnesium Biomass production Nutrient removal Microalgae