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The progressive adoption of an urban, industrial lifestyle has deteriorated the quality of freshwater reservoirs and caused a global challenge for satisfying the demand and maintaining water quality. Industrial, agricultural and domestic processes contaminate water with chemical and biological pollutants that cannot be released into the environment until treated. Traditional wastewater treatment plants are effective in remediating suspended solids and many harmful elements, but they are not always effective in nitrate and phosphate removal causing them to be discharged into the environment. This study aims to determine the effectiveness of algae to bioremediate nitrate and phosphate content from wastewater. Four algae species were tested with wastewater in a bioreactor setup for ten days. The nitrate and phosphate contents were measured every day using a HACH-DR-890 colorimeter to see how effectively the specimen remediated the nitrate and phosphate contents. The analysis shows all four species were able to effectively remediate 93-96% of nitrate and 73-86% of phosphate. Chlamydomonas reinhardtii was the most effective in nitrate remediation with a 95.66% remediation and Scenedesmus quadricauda was the least effective with 93.97% remediation. For phosphates, S. quadricauda (85.22%) was most the effective with 85.22% remediation and A. platensis was the least effective with a 73.36% remediation. This study concludes that algae bioremediation is viable in treating nitrates and phosphates in wastewater in a natural, sustainable way compared to conventional treatment processes.

Bioremediation of Wastewater – Effect of Algae in Bioremediation of Nitrate and Phosphate Content in Wastewater