Sulfate reduction on acetate and hydrogen alone provides a good compromise on model structure complexity in AD
A comparative analysis of five different models describing anaerobic digestion (AD) with sulfate reduction (SR) process was conducted to assess the acceptable level of complexity that can be adequately considered during model development.Amongst the existing SR model developments in AD,one of the major differences is the number and type of SR microbial groups considered in terms of the electron donor they consume.In this work,the model structures compared consist of either one or more of butyrate,propionate,acetate or hydrogen utilizing SRB groups (bSRB,pSRB,aSRB,and hSRB respectively).The basic model structure consists of SR process incorporated into IWA ADM1 with modifications made according to the number of SRB groups present for each model.The model predictions of each model were compared with one another using experiment conditions and data set from literature.Our results show that the simple aSRB plus hSRB model (MAH) achieves similar performance when compared to the more complex tested models in terms of prediction errors with the experimental data.All model structures proposed obtained reasonable model predictions (after calibration) when compared with experimental data except for the model considering only hSRB (MH) that provides a very poor prediction and even fails to accurately describe SR process alone.Although overall the MAH model (aSRB plus hSRB) obtains comparable model prediction performance with respect to the complex models,thereby indicating that it can adequately represent the system at hand,further studies with additional experimental data sets and scenarios are needed to arrive at clear conclusions.
Sulfate reduction anaerobic digestion sulfate reduction modelling ADM1
W.Ahmed J.Rodríguez
Department of Chemical and Environmental Engineering, Masdar Institute of Science and Technology, PO Box: 54224, Abu Dhabi, UAE
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
373-376
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）