Effect of pot-ale enrichment on the treatment efficiency of primary settled wastewater by the microalga Chlorella vulgaris

This study evaluated the performance of microalgae under static cultivation for primary settled municipal wastewater (PSW) treatment as a low energy process. The availability suitable carbon substrate was determined to be main limiting factor affecting algal performance. To overcome material cost applying commercial sources organic carbon, we pot ale – carbohydrate-rich by-product from production malt whiskey promote growth and removal nitrogen (NH 3 –N) phosphate (PO 4 –P) in PSW. For this, mixotrophic microalgal species Chlorella vulgaris used batch experiments PSW enriched with ale. Characterisation treatments compared control (WWC) (WWPA) highlighted that C. key organism algal-bacterial consortium responsible inorganic N P removal. We also observed high variability characteristics across independent batches ale, which resulted efficiency by alga, 99% 58% at reducing NH –N, 94% PO –P. As an extension these batch-wise operated treatments, investigated –N –P semi-continuous operation enrichment found this viable system potential further development. work highlights use promising application enhancing nutrient • Pot significantly enhances (N & P) played role Availability is major micro-algae. Removal option