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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Contact us today, for one of our design engineers to evaluate your application and determine the optimum folter parameters for your installation. The low operating cost attributes to the utilization of microbial oxidation at ambient conditions instead of thermal or chemical oxidation conditions.

Owing boitrickling the similarity of the four bioreactors to resist the shock loads, the biotrickling filter after starvation experiment 1 was investigated. Biotrickling filter, Starvation, Shock loads, Odor, Hydrogen sulfide.

Inlet H 2 S concentration was kept at a relatively high value at the re-acclimation process without ramping up.

Therefore, re-acclimation of the biotrickling filters after starvation was not a major limit factor for H 2 S removal. The packed carriers in each section were supported by plexiglass sieve plates.

The bioreactor could resist the shock of high loads under relatively stable biomass content at the end of acclimation phase.

Biotrickling filter

Furthermore, an important implication of these starvation experiments was that significant energy can be saved by shutting the blower and the water pump off during industrial operation, which would not lead to notable adverse effects. The void fraction of the bioreactor was 0. The H 2 S outlet concentration in steady state was maintained below 1. Only a few studies discussed the effects of starvation and shock loads on the performances of biofilters for H 2 S removal.


Abstract In the industrial operation of biotrickling filters for hydrogen sulfide H 2 S removal, shock loads or starvation was common due to process variations or equipment malfunctions. Articles from Journal of Zhejiang University. The most widely utilized bioreactors for air pollution control are biofilters and biotrickling filters. The supply of H 2 S was stopped in the biotrickling filters during the starvation experiments.

Biotrickling filter | EMIS

This mean that water must be uniformly sprayed over the packing. Only a small recirculation pump is need for vaporisation water. Therefore, the bioreactor could meet the demand of gilter operation to resist the shock loads. Therefore, the biofilm containing sulfur-oxidizing bacteria was gradually formed on the surface and in the pores of the carriers. Transient response of biotrickling filter to fluctuating H 2 S after re-acclimation.

During the subsequent re-acclimation, all the bioreactors could resume high removal efficiencies within 4 d regardless of the previous starvation conditions.

biotrickliing 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.

In this study, effects of starvation and shock loads on the performance of biotrickling filters for H 2 S removal were investigated. Skip to main content. In the biotrickling biotriclking, the packing may become blocked due to strong growth in the biofilm.

There were two possible reasons for the decrease of removal efficiency at this higher inlet concentration. In contrast to the change of the biomass, the change of live bacteria numbers was more drastic, suggesting that death rate of live bacteria was faster than loss rate of biomass owing to endogenous decay, secondary predation, or oxygen limit. Biofiltration is a pollution control technique using a bioreactor containing living material to capture and biologically degrade pollutants.


The viable microorganism number was a major indicator for the restart of the bioreactors.

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We are a market diversified business with both in house manufacturing and engineering. Compared with other experiments, the live bacteria number was similar at the end of experiments 1 and 2 16 to 24 d in Fig. Performance of biotrickling filter is usually studied under relatively steady-state operation conditions in laboratory systems.

Re-acclimation experiments were conducted to investigate the response of these previously acclimated biotrickling filters to starvation periods and evaluate whether the biotrickling filter can recover rapidly and meet the demand of industrial application.

The nutrients are constantly dosed and dosage is periodically checked via analyses. Liquid from the upper reservoir tank could be sprayed regularly downward through the bioreactor by centrifugal water pump fi,ter was discharged from the bottom. Hydrogen sulfide adsorption and oxidation onto activated carbon cloths: The present research described the results of a bench-scale study investigating the effects of H 2 S starvation and shock loads on biortickling filter performances.

Starvation experiment H 2 S supply Air supply Spray liquid with nutrient solution Possible conditions 1 off off off Equipment repair or equipment malfunction 2 off off on Blower breakdown 3 off ibotrickling on Weekend or holiday with water supply and air kept on 4 off on off Water pump malfunction. This article has been cited by other articles in PMC. The filter material consists of synthetic foam, lava or a structured plastic packing.