Optimization of biogas potential using kinetic models, response surface methodology, and instrumental evidence for biodegradation of tannery fleshings during anaerobic digestion oleh V. Kavan Kumar, Mahendiran R., Subramanian P., Karthikeyan S., Surendrakumar A., Kumargouda V., Y. Ravi, Choudhary Sharda, Singh Ravindra, Verma Arvind K.