Semnan University Press Applied Chemistry Today 2981-2437 1395 Special Letter to the First Symposium on Applied Chemistry of Iran, September 2016 2017 01 20 Evaluation of Cefixime trihydrate effect on the biological properties of activated sludge Evaluation of Cefixime trihydrate effect on the biological properties of activated sludge 1 7 2306 10.22075/chem.2017.2306 FA Soheil Aber Leila Ghalamchi Raana Tajdidkhaje Journal Article 2017 02 17 Activated sludge is an aerobic biological wastewater treatment process. This process has been efficiently and extensively used for the treatment of industrial and municipal wastewaters since about 100 years ago. Some drugs such as antibiotics have adverse effects on the bacteria in activated sludge. Cefixime trihydrate is a semi-synthetic antibiotic belonging to the third generation of Cephalosporins. In this research the effect of Cefixime on the biological operational parameters of activated sludge process was investigated. MLSS, SVI, COD and microscopic analysis of sludge texture were evaluated. The results showed that by carefully controlling of the operational parameters in adopting period, sludge quality can be kept in acceptable level. MLSS of 3500 ppm, pH of 7.6 and SVI of 90 mL.g-1 were average controlled parameters. The COD reduced from 800 to 40 ppm after implementing the adoption period. Optical microscopic analysis showed that after adoption period, microorganisms such as protozoa and ciliate are active in activated sludge even in the presence of antibiotic. Activated sludge is an aerobic biological wastewater treatment process. This process has been efficiently and extensively used for the treatment of industrial and municipal wastewaters since about 100 years ago. Some drugs such as antibiotics have adverse effects on the bacteria in activated sludge. Cefixime trihydrate is a semi-synthetic antibiotic belonging to the third generation of Cephalosporins. In this research the effect of Cefixime on the biological operational parameters of activated sludge process was investigated. MLSS, SVI, COD and microscopic analysis of sludge texture were evaluated. The results showed that by carefully controlling of the operational parameters in adopting period, sludge quality can be kept in acceptable level. MLSS of 3500 ppm, pH of 7.6 and SVI of 90 mL.g-1 were average controlled parameters. The COD reduced from 800 to 40 ppm after implementing the adoption period. Optical microscopic analysis showed that after adoption period, microorganisms such as protozoa and ciliate are active in activated sludge even in the presence of antibiotic.

https://chemistry.semnan.ac.ir/article_2306_ff3c397bbe6e037b0c86516dcffd44e5.pdf