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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Thus operational problems normally ignored in the laboratory systems appear, and resuming normal operation is vital after encountering variable operation conditions. When storage is low, anaerobic circumstances may arise and cause odour. Re-acclimation experiments were biotricling 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.

Biotrickling filter | EMIS

This will help to spare the biotrickling filter. Please review our privacy policy. This mean that water must be uniformly sprayed over the packing. Open in a separate window. Auxiliary materials Nutrients to feed bacteria Suppletion water to compensate for discharge and vapour losses. In the present experiments, the lowest biomass after starvation was about 0. Adsorption oxidation of hydrogen sulfide on activated carbon fibers: This will lead to prefered flows, which will in-turn reduce efficiency and increase pressure bjotrickling.

The polluted components absorb in the liquid film and are decomposed by the bacteria. Co-treatment of H 2 S and toluene in a biotrickling filter. The biomass decreased slowest in experiment 1, but fastest in experiment 4. Re-acclimation of experiment 4 was slower than those of other starvation experiments, which is correlated with the live microorganism numbers in the bioreactors. The viable microorganism number was a major indicator for the restart of the bioreactors. 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 fliter via a continuous water make-up or overflow.


Van de Meulebroecke1, P.

Biotrickling filter

It is important to pass odour-laden gases from the storage place through the biotrickling filter or another air purification device. The supply of H 2 S vilter stopped in the biotrickling filters during the starvation experiments.

On the biotrixkling hand, the experiments were carried out under the high liquid trickling velocity with 5 L of the nutrient solution, once 1 h in order to avoid the clogging of the bioreactor, which could limit the increase of biomass and further resulted in the decrease of removal capacity in the bioreactor. The standard KCH Biotrickling Filter System incorporates an integral sump box and pump circulation system built into the vessel.

Chemicals for pH correction. In order to keep salt concentrations within acceptable limits, one section must be discharged and filled with fresh water. Periods of interruption may vary from a few minutes, as for lunch breaks, to several days.

Table 1 Experimental design for H 2 S starvation. We’ll assume you’re ok with this, but you can opt-out if you wish.

Biotrickling filter response to shock loads In order to further study the acclimatization of the bioreactor to shock loads, the bioreactor was supplied with H 2 S of variable concentration after resuming normal operation.

The live bacteria number decreased slowest in experiment 3 with continuous oxygen and spray liquid, but fastest in experiment 4. Re-acclimation processes of four starvation experiments biotricklinf similar after restarting biotrickling filters.

The nutrient solution of spray water was as follows: Co-treatment of hydrogen sulfide and methanol in a single-stage biotrickling filter under acidic conditions. The fact that full activity of sulfur-oxidizing bacteria was recovered suggests that re-acclimation did not require the buildup of significant amounts of new degrading biomass.

Transient response of biotrickling filter to fluctuating H 2 S after re-acclimation. The biotrickling filters of experiments 1 and 4 were starved without trickling liquid.

Starvation experiment H 2 S supply Air supply Spray liquid with nutrient solution Possible conditions 1 off off off Equipment fliter or equipment malfunction 2 off off on Blower breakdown 3 off on on Weekend or holiday with water supply and air kept on 4 off on off Water pump malfunction. During dimensioning it is important to set the load at a modest level in order to avoid such blockages. Nevertheless, these technologies are usually uneconomical because they only transfer waste gases from the gas phase to another phase that either requires the use of further treatments or is expensive to maintain good operation performance.


Treatment of odor containing hydrogen sulfide released in the wastewater of pharmaceutical company by high efficient bioreactor with the packed stuffing.

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The most widely utilized bioreactors for air pollution control are biofilters and biotrickling filters. This article has been blotrickling by other articles in PMC. The nutrients are constantly dosed and dosage is periodically checked via analyses.

Only a small filtwr pump is need for fioter water. The process of biotrickling filtration is, as is also the case with biofilters and bioscrubbers, a biological way of air treatment whereas the pollutants are not absorbed in a filter but in a trickling bioteickling.

Common uses of a biofilter include processing waste water, capturing harmful chemicals or silt from surface runoff, and microbiotic oxidation of contaminants in air.

The biotrickling filters with an inner diameter of mm and a height of mm were made of transparent plexiglass tubing. On the other hand, the biotrickling filters can protect against shock loads in inlet fluctuating H 2 S concentration after resuming normal operation.

However, it should be noted that high liquid trickling velocity could also result in biomass loss due to liquid shear stress. Four biotrickling filters were operated similarly throughout the entire experiment, except for the starvation phase. The low operating cost attributes to the utilization of microbial oxidation at ambient conditions instead of thermal or chemical oxidation conditions. Inlet H biotfickling S concentration was kept at a relatively high value at the re-acclimation process without ramping up.