Bioremediation Of Wastewater From An Agricultural Drain By The Use Of Microalgae
Ibrahim, H.A.H., Heikal, S.M., Elshahed, A.M.
Wastewater from an agricultural drain has been subjected to treatment with three algal species encapsulated in Ca alginates; Chlorella sp. Chlamydomonas sp. and Scenedesmus sp.. Experiments were made using liquid stationary cultures containing wastewater and the entrapped microalgae. Investigations concerned evaluation of the percent removal of ammonium nitrogen (N-NH4+), phosphate phosphorus (P-PO43-), total soluble salts (TSS), Ca2+, Mg2+, K+, as well as change in chemical oxygen demand (COD) of the treated wastewater. The results revealed that N-NH4+ was removed from wastewater by 77.13, 72.87 and 55.32% of the initial concentration by Chlorella sp., Chlamydomonas sp. and Scenedesmus sp., respectively. P-PO43- was also removed by 87.36, 71.56 and 74.2% when treated with Chlorella sp., Chlamydomonas sp. and Scenedesmus sp., respectively. TSS were reduced by 48.65, 29.73 and 27.03% by Chlorella sp., Chlamydomonas sp. and Scenedesmus sp., respectively. COD value was also reduced on treatment with Chlorella sp. to 51.13% of the initial concentration.