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The treatability of seven wastewater samples generated by a textile digital printing industry was evaluated by employing 1) anammox-based processes for nitrogen removal 2) microalgae ( Chlorella vulgaris)  for nutrient uptake and biomass production 3) white-rot fungi ( Pleurotus ostreatus  and  Phanerochaete chrysosporium)  for decolorization and laccase activity. The biodegradative potential of each type of organism was determined in batch tests and correlated with the main characteristics of the textile wastewaters through statistical analyses. The maximum specific anammox activity ranged between 0.1 and 0.2 g N g VSS -1  d -1  depending on the sample of wastewater; the photosynthetic efficiency of the microalgae decreased up to 50% during the first 24 hours of contact with the textile wastewaters, but it improved from then on;  Pleurotus ostreatus  synthetized laccases and removed between 20–62% of the colour after 14 days, while the enzymatic activity of  Phanerochaete chrysosporium  was inhibited. Overall, the findings suggest that all microbes have great potential for the treatment and valorisation of textile wastewater after tailored adaptation phases. Yet, the depurative efficiency can be probably enhanced by combining the different processes in sequence.

Assessment of anammox, microalgae and white-rot fungi-based processes for the treatment of textile wastewater