Nutrients and organic matters removal of ospitals wastewater by microalgae

Abstract

Global water contamination by different sorts of pollutants become an emerging environmental concern. Using microalgae as pollutants removal element has currently gained scientific attention. The study aims to examine the capacity of Chlorella sp and Anabaena sp simultaneous, remediate hospital wastewater at 22°C and 32°C on gradient concentration of Nutrients and organic matters 5%, 25% and 50%, the parameters measured on the day 1, 4, 10 and 14 of planting them in lab bioreactors. The results showed greater vitality of Chlorella sp and Anabaena sp to remove pollutants at both temperatures at 50% concentration. At 22°C Anabaena sp showed more removal efficiency of PO4 than Chlorella sp at 100% and 82%, respectively, while for NO3 both almost have the same ability at 99% and 94% sequentially. It was similar to COD when the removal percentage was 94% for both of them. At 32°C the results illustrated different pattern of removal for NO3 and COD but, it was same for PO4. Chlorella sp has better removal proportion for NO3 at 76% and COD at 93% compare to Anabaena sp for NO3 and COD at 54% and 92%. However, Anabaena sp removes 69% and Chlorella sp 56% of PO4 at this temperature. Our study indicates that the microalgae performed great ability to remove and capacity of growth in this type of wastewater which is appearing to play a key role in biodegradation process through high removal efficiency and low environmental impact.