Potential of Fungal-Microalgal species in the Environmental Biotechnology

Biotechnology involves the provision of services to society by microbial communities. By using microorganisms to detoxify contaminated water, and environmentally friendly solutions to the treatment of wastewater. Isolates of fungi Aspergillus niger, Candida albicans and microalgal isolates Tetradesmus nygaardi and Scenedesmus quadricauda were efficiently utilized to treat wastewater. The wastewater sample was taken from Erbil wastewater channel near Dhahibah village, the sample was analyzed for physicochemical parameters such as pH, EC, TDS, BOD5, PO4, NH4, NO3, and NO2 (every three day) during 21 days of experiment. Results revealed that a mixed culture of S. quadricauda with T. nygaardi were shows the best removal of PO4, NH4, NO3 and NO2 which was 94.94%, 90.73%, 88.23%, 93.84% respectively. Whereas a mixed culture of T. nygaardi with A. niger showed the best removal of BOD5 (94.9%), the highest reduction in electrical conductivity and total dissolved solid were recorded by mix culture of A. niger with C albicans which was 81.65% and 81.52%. During the treatment period chlorophyll-a concentration reached the highest value of (1.052, 1.005 and 2.521 mg. l-1). Statistically, there were a significant difference (p≤0.05) between the control and all microbial strains for all wastewater tested variables.