REMOVAL OF INORGANIC NUTRIENT AND ORGANIC CARBON FROM WASTEWATER OF BINH DIEN MARKET USING THE GREEN ALGA CHLORELLA SP.

Abstract

Traditional market plays a major role in socio-economic and constitutes a significant aspect of Vietnamese culture. However, wastewater streams discharged from the markets are generally characterized with a lot of inorganic nutrients and organic substances originated from the fresh food processing units. They will lead to serious water contamination if discharged without proper treatment. This study had applied microalgae Chlorella sp. for eliminating inorganic nutrient (N-NH₄⁺, N-NO₃^-, P-PO₄^3-) and organic carbon (Chemical oxygen demand-COD) from wastewater of Binh Dien market. The removal efficiencies were reached N-NH₄⁺ > 86%, N-NO₃^- > 72%, and P-PO₄^3- > 69%, respectively at algae density 49 x 10⁴ cell mL^-1 and COD > 96% at algae density 35 x 10⁴ cell mL^-1 after five cultivating days. The effluence was also reached the Vietnamese standard column B of QCVN 40:2011/BTNMT. Results demonstrated that culture system composed of green alga Chlorella sp. can be a potential candidate for the removal of nutrients and organic carbon in wastewater treatment from Binh Dien market.