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May 2018 - August 2018
Publications
Publications (13)
Anoxic biotrickling filters (BTFs) represent a technology with high H2S elimination capacity and removal efficiencies widely studied for biogas desulfurization. Three changes in the final electron acceptors were made using nitrate and nitrite during an operating period of 520 days. The stability and performance of the anoxic BTF were maintained whe...
Biotrickling filters’ control for H2S removal has special challenges because of complexity of the systems. Feedback and feedforward control were implemented in an anoxic biotrickling filter, operated in co-current flow mode and using nitrite as an electron acceptor. The feedback controller was tuned by three methods—two based on Ziegler-Nichols’ ru...
Hydrogen sulfide has been successfully removed from biogas using anoxic biotrickling filters but an in-depth study of the main operational variables has not yet been carried out. The effect of (i) the empty bed residence time (32–164 s) at a hydrogen sulfide concentration of 2,000 ppm v , (ii) the inlet hydrogen sulfide concentration (2,000–10,000...
Nitrate has been progressively replaced by nitrite as the electron acceptor in the oxidation of H2S from biogas mimic by an anoxic biotrickling filter. Perturbations in the inlet H2S concentration with and without the implementation of feedback controllers have been evaluated. Nitrite was successfully used without decreasing the H2S removal efficie...
BACKGROUND
Feedforward control was implemented at laboratory scale in an aerobic and an anoxic biotrickling filter (BTF) operating under fluctuating H 2 S loading rate (LR) conditions in order to show the capabilities and added value of this control strategy. Dynamic, long‐term tests with variable H 2 S LR were performed to simulate disturbances in...
BACKGROUND
A high H2S elimination capacity has been achieved by anoxic biotrickling filters but accurate control of the nitrate dosage is required. Different control strategies have been used in biotrickling filters but PID control studies have not been reported to date. The aim of this study was to demonstrate the stability and robustness of PID c...
It is necessary to remove hydrogen sulfide (H2S) to allow biogas energy recovery. Anoxic biotrickling filters (BTF) can achieve high elimination capacities (EC). However its demanding high amounts of nitrate (NO3 -), which is the most important operational cost, is a very important drawback. At the same time, high ammonium (NH4 +) concentration can...
Hydrogen sulfide (H2S) is the main sulfur reduced compound present in biogas. Biotrickling filters (BTFs), aerobic and anoxic, have been showed high H2S elimination capacities. Nevertheless, anoxic BTF have one well-known advantage; not lead to biogas dilution. On the other hand, it requires the use of nitrate as an electron acceptor. A lab-scale a...
La biofiltración anóxica de efluentes gaseosos se presenta como una alternativa viable para el tratamiento de gases contaminados, así como para la limpieza del biogás como paso previo a su utilización como biocombustible. En este trabajo se presentan los avances llevados a cabo por el grupo de investigación en relación a esta temática.
Hydrogen sulfide (H2S) can be successfully removed from biogas using anoxic biotrickling filters. A biotrickling filter with a height: diameter ratio of 9.8 (total packed volume of 2.8 L) and Polypropylene Pall rings (5/8’’) was fed continuously with nitrate and mimics biogas. It was studied the effect of the empty bed residence (EBRT) (45-130 s),...
Development of an efficient oxygen elimination technology for reducing oxygen content in landfill gas for fuel quality - the noo2 technology