Received: 01-02-2023 / Accepted: 27-03-2023
Textile dyeing wastewater with alkaline pH, high outlet temperature, high total dissolved solids, starch slurry, and heavy metal content is toxic to aquatic life and affects drainage systems. Towards a safe and environmentally friendly textile industry, utilization ofmesophilic bacteria capable of growing at temperature of 40-50C, such as photosynthetic purple bacteria is considered bio-friendly and effective solution for textile dyeing wastewater treatment. Photosynthetic bacterium was isolated based on its cell growth rate and biofilm forming capability. The isolate was genetically analyzed and its capability of dyeing wastewater degradation on keramizite gravel carriers was evaluated. As the results, from wastewater samples, the strain 62 was isolated and identified as Rhodopseudomonassp. This photosynthetic purple bacterial strain was used to create biofilms on keramizite gravel carriers. It was initially shown that BOD5 and COD removal capacity of this strain reached 67.77 and 81.99%, respectively, after 14 days of treatment at temperature range 40-50C.Keywords: Biofilm, textile wastewater, mesophilic, microorganisms, keramizite.
