Treatment of Mixed Domestic industrial Wastewater Using microalgae Chlorella sp
Microalgae culture offers an effective solution for wastewater treatments, because they provide a tertiary biotreatment coupled with the production of potentially valuable biomass, which can be used for different purposes. The present study demonstrated the growth of Chlorella sp. in mixed domestic industrial wastewater without sterilization in a laboratory scale batch process under the continuous illumination of light and continuous aeration and evaluated efficiency of Chlorella sp. for eliminating ammoniumnitrogen, nitratenitrogen, phosphorus, coliform bacteria, biological oxygen demand (BOD) chemical oxygen demand (COD) and heavy metals. The growth of microalgae Chlorella sp. in wastewater was relatively lower than its growth in standard medium (Zmedium) under the same conditions, where dry weight recorded 1.42 and 1.13gm l, at the same time chlorophyll (a) recorded 5.65 and 4.55 mg lwhile, cell count was 22.3x10 and 12.8x10 in z medium and wastewater respectively. The removal efficiency percentage of BOD, COD, NH4 N, NO3 N and PO4 P reached 90.8 80.1 98.9 87.6 and 90 respectively. Chlorella sp. has the ability to accumulate the heavy metals from the wastewater to Whereas, the heavy metals biosorption performance of Chlorella sp. Was higher in accumulating nickel (99.5 Mn (73.2 Fe (92.2 Cu (54.5 Zn (51.4) Cr (56.3 Mo (99.7 Al (98.8 Si (48.5 V (100 Ti (100 Sr (41.9 Therefore, removal of heavy metals and nutrients by the tested algae is strongly recommended as a powerful technique for the removal of pollutants from wastewater. [Hammouda, O. Abdel Raouf, N. Shaaban, M. and Kamal, M. Treatment of Mixed Domestic industrial Wastewater Using microalgae Chlorella sp. J Am Sci 2015;11(12):303 315] (ISSN: 1545 1003) http:/www.jofamericanscience.org. 38. doi:10.7537/marsjas11121538.