KCH designs and manufactures a Biotrickling Filter System to remove high levels of hydrogen sulfide (H2S) gas and other odors from municipal and industrial. KCH Engineered Systems designs and manufactures a Biotrickling Filter System to remove high levels of hydrogen sulfide (H2S) gas and other. A biotrickling filter is a combination of a biofilter and a bioscrubber. The process of biotrickling filtration is, as is also the case with biofilters and bioscrubbers.

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Biotrickling Filter Systems

A biotrickling filter is a combination of a biofilter and a bioscrubber. Open in a separate window.

This will lead to prefered flows, which will in-turn reduce efficiency and increase pressure drop. Owing to the variable industrial schedules, pilot-scale or full-scale biotrickling filters are usually exposed to many perturbations as a result of fluctuation or discontinuous shock loads.

Compared with other experiments, the live bacteria number was similar at the end of experiments 1 and 2 16 to 24 d in Fig. Long-term operation may result in excess biomass formation when nutrient loads and pollutant concentrations are high.

National Center for Biotechnology InformationU. B are provided here courtesy of Zhejiang University Press. In the biotrickling filter, the packing may become blocked due to strong growth in the biofilm. When storage is low, anaerobic circumstances may arise and cause odour. The airflow rate was kept at 6. And the biomass did not drop to a level where biodegradation efficiency would be limited during the starvation experiments. Thus operational problems normally ignored in the laboratory systems appear, and resuming normal operation is vital after encountering variable operation conditions.


Adsorption oxidation of hydrogen sulfide on activated carbon fibers: Biotrickling Filters use a synthetic media to support the growth of natural occurring micro-organisms to convert H2S into a dilute acid solution, part of which is discharged via a continuous water make-up or overflow.

Biotrickling Filters | KCH Services Inc.

Environmental aspects The discharged sludge must be carried away. The most widely utilized bioreactors for air pollution control are biofilters and biotrickling filters. Therefore, the biofilm containing sulfur-oxidizing bacteria was gradually formed on the surface and in the pores of the carriers.

Instead of chemicals, a simple non-proprietary nutrient is used to promote biological growth on a synthetic media. Clean air supply was maintained in experiments 3 and 4, but discontinued in experiments 1 and 2. The present research described the results of a bench-scale study investigating the effects of H 2 S starvation and shock loads on biotrickling filter performances.

VAT Case study 3: Compared with the biomass, the live bacteria numbers were a more important parameter for resuming high H 2 S removal efficiency after the starvation. Biotrickling filter functions by passing the filtef air stream through a moist bed of permeable material, on which liquid biofilms are formed.

Can be used as a first stage unit to extend the life of Carbon units.

Biofilters and Biotrickling filters | SOS Hygiene

Little is known on the starvation experiments of biotrickling filter for H 2 Filte removal and a limited number of studies involved actual measurements of biomass and viable bacteria numbers during starvation.

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Hence, periods of starvation associated with a decrease of biomass would not decrease the lifespan of the biotrickling filter. Owing to the similarity of the biomass in four bioreactors, only one of the biotrickling filters was evaluated prior to the shock loads. The viable microorganism number was a major indicator biotriciling the restart of the bioreactors.

The void fraction of the bioreactor was 0.

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Transient response of biotrickling filter to fluctuating H 2 S after re-acclimation. Plate count Samples were taken at same depth 35 cm from the biotrickling filters described above.

The biomass decreased slowest in experiment 1, but fastest fliter experiment 4. Re-acclimation processes of four starvation experiments were similar after restarting biotrickling filters. Schematic diagram of biotrickling filter system 1: Skip to main content. Co-treatment of H 2 S and toluene in a biotrickling filter. On the other hand, a toxic effect of higher concentration of H 2 S on the microbial communities could also lead to the decrease of removal efficiency by altering the carrier pH because the bioreactor could produce acidification phenomenon during the long-term operation, as reported in our previous study Xie et al.

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