“…More on AD process inhibition due to ammonia, sulfide, light metal ions, heavy metals and other compounds is discussed in Chen et al (2008), Zhao et al (2010) and Yenigün and Demirel (2013). A review on the issue of instrumentation and process control can be found in Jimenez et al (2015), on mathematical models for both simulation and control purposes in Lauwers et al (2013), and on recent advances in the utilization of inorganic and biological additives to improve digester performance in Romero-Güiza et al (2016).…”