Photoautotrophic cultivation of mixed microalgae consortia using various organic waste streams towards remediation and resource recovery

- Three various growth medium have been evaluated for microalgae cultivation.
- Textile waste water showed the best potential for enhanced microalgae growth.
- Peak growth rate and biomass production of 0.419 d−1 and 0.4 g/L were attained.

In this study, mixed microalgae consortia was cultivated using digestate (D), animal manure (AM) and textile wastewater (TW) as growth medium providing mainly N (nitrogen) and P (phosphorous) sources without any extra nutrient addition. The corresponding total nitrogen (TN) and total phosphorous (TP, PO3-P) concentrations were noted as 323 and 21 for AM, 481 and 31 for TW and 747 and 55 mg/L for D, respectively. After a cultivation period of 13 days, P were completely removed (100%), however, N was still remain and attained the removal rate of 70.1, 72.3 and 16.7% for TW, AM and D, respectively. The peak growth rate and biomass production of 0.419 d−1 and 0.4 g/L (in terms of volatile solids, VS) was achieved using TW as growth medium.