Previous Article in Journal
Insights from Mathematical Modelling into Energy Requirement and Process Design of Continuous and Batch Stirred Tank Aerobic Bioreactors
Previous Article in Special Issue
Evaluation of Biogas Biodesulfurization Using Different Packing Materials
Article Menu

Export Article

Open AccessArticle

Application of Response Surface Methodology for H2S Removal from Biogas by a Pilot Anoxic Biotrickling Filter

Department of Chemical Engineering and Food Technologies, Wine and Agrifood Research Institute (IVAGRO), Faculty of Sciences, University of Cádiz, 11510 Puerto Real (Cádiz), Spain
*
Authors to whom correspondence should be addressed.
ChemEngineering 2019, 3(3), 66; https://doi.org/10.3390/chemengineering3030066
Received: 13 May 2019 / Revised: 4 July 2019 / Accepted: 11 July 2019 / Published: 13 July 2019
(This article belongs to the Special Issue Advances in Biogas Desulfurization)
  |  
PDF [2875 KB, uploaded 13 July 2019]
  |  

Abstract

In this study, a pilot biotrickling filter (BTF) was installed in a wastewater treatment plant to treat real biogas. The biogas flow rate was between 1 and 5 m3·h−1 with an H2S inlet load (IL) between 35.1 and 172.4 gS·m−3·h−1. The effects of the biogas flow rate, trickling liquid velocity (TLV) and nitrate concentration on the outlet H2S concentration and elimination capacity (EC) were studied using a full factorial design (33). Moreover, the results were adjusted using Ottengraf’s model. The most influential factors in the empirical model were the TLV and H2S IL, whereas the nitrate concentration had less influence. The statistical results showed high predictability and good correlation between models and the experimental results. The R-squared was 95.77% and 99.63% for the ‘C model’ and the ‘EC model’, respectively. The models allowed the maximum H2S IL (between 66.72 and 119.75 gS·m−3·h−1) to be determined for biogas use in a combustion engine (inlet H2S concentration between 72 and 359 ppmV). The ‘C model’ was more sensitive to TLV (–0.1579 (gS·m−3)/(m·h−1)) in the same way the ‘EC model’ was also more sensitive to TLV (4.3303 (gS·m−3)/(m·h−1)). The results were successfully fitted to Ottengraf’s model with a first-order kinetic limitation (R-squared above 0.92). View Full-Text
Keywords: hydrogen sulfide; anoxic biotrickling filter; biogas; Ottengraf’s model; open polyurethane foam; response surface methodology hydrogen sulfide; anoxic biotrickling filter; biogas; Ottengraf’s model; open polyurethane foam; response surface methodology
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Almenglo, F.; Ramírez, M.; Cantero, D. Application of Response Surface Methodology for H2S Removal from Biogas by a Pilot Anoxic Biotrickling Filter. ChemEngineering 2019, 3, 66.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
ChemEngineering EISSN 2305-7084 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top