eased the methane yield by 6%, 9% 12%, and 16%, respectively. Maximum specific methane production rates based on modified Gompertz model and Kh values were the same for TE added and control reactors. A comparison between the performance of anaerobic digestion of FW with the two types of sludge indicates that methanogenic activity, methane yields (in all cases), and hydrolysis rate constant (in the Fe2+ case) were improved significantly when TEs were added to the batch reactors with low Fe inoculum, potentially due to the very different levels of Fe in the two inoculums which increase TE bioavailability. Thus, supplementing TEs in AD should be accompanied with a trace element background check in the sludge to make sure that Fe concentrations are not at the levels to promote co-precipitation and/or adsorption of ionic TEs onto the abundant Fe sulfide precipitates.
Yazdanpanah, Andisheh, "Impact of Trace Element Ions and Fe2+ on Anaerobic Food Waste Digestion" (2018). Electronic Thesis and Dissertation Repository. 5475.