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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Hence, periods of starvation associated with a decrease of biomass would not decrease the lifespan of the biotrickling filter. In the starvation experiments, liquid trickling velocity was controlled at a relatively low value once per hour, with 3 L of nutrient solution to supply necessary nutrient materials for microorganism and decrease the effect of liquid shear stress on biotricklinh biomass.

Biofilters and Biotrickling filters | SOS Hygiene

Van de Meulebroecke1, P. 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.

Municipal Waste Treatment Plants. Water, Air and Soil Pollution.

In the present experiments, the lowest biomass after starvation was about 0. Thus the sulfur oxidizing bacteria were enumerated during the starvation experiments. KCH designs and manufactures a Biotrickling Filter System to remove high levels of hydrogen sulfide H 2 S gas and other odors from municipal and industrial processes.

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

Interruption of H 2 S feed was achieved under selected conditions with or without air flow, with or without spray liquid supply for a duration from 21 to 45 d. The momentary response of the bioreactor to these abrupt changes in inlet concentration is presented in Fig. In this study, effects of starvation and shock loads on the performance of biotrickling filters for H 2 S removal were investigated. The pressure drop over the filter is 1 — 10 mbar.


Table 1 Experimental design for H 2 S starvation. The pH can be continuously measured and corrected. Environmental aspects The discharged sludge must be carried away. At the same time, starvation was a useful factor to avoid the clogging of the bioreactor, which could reduce the biomass of the bioreactor in a way.

In order to check the removal efficiency of H 2 S at different height, each biotrickling filter was divided into three equal sections and each section was equipped with a gas sampling port.

This can take place on the basis of conductivity. Microorganism would die gradually under the aerobic and nutrient solution absence conditions. This was different from the startup phase of the bioreactor.

This is probably due to the loss of moisture in the biofilm. The biomass decreased slowest in experiment 1, but fastest in experiment 4.

Biotrickling Filter Systems

Please review our privacy policy. Therefore, the biofilm containing sulfur-oxidizing bacteria was gradually formed on the surface and in the pores of the carriers. Effects of periods of starvation and fluctuating hydrogen sulfide concentration on biofilter dynamics and performance. Samples were taken at same depth 35 cm from the biotrickling filters described above.

Applied Microbiology and Biotechnology.

Biotrickling Filters | KCH Services Inc.

The low operating cost attributes to the utilization of microbial oxidation at ambient conditions instead of thermal or chemical oxidation conditions. And the biomass did not drop to a level where biodegradation efficiency would be limited during the starvation experiments. Maximum Biotriclling to UV Exposure. In order to keep the activity of microorganism and also save energy, air and nutrient solution could be stopped and only supplied at regular intervals, which could reduce the time for restart.

Biotrickling filters are used for applications in which there is no space for a biofilter, where biotriclling efficiency of a biofilter is not sufficient, or in the presence of ph-relevant compounds. We are a market diversified business fklter both in house manufacturing and engineering. Removal of ternary VOCs in air streams at high loads filtee a compost-based biofilter. Overall, the results show that the bioreactor could meet the demand of industrial operation to resist the shock loads and starvation condition for H 2 S removal.


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. Quantity is determined by the load and composition of flue gases. This phase may become acidic. Biotrickling Filters use a synthetic media biotrikling 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.

The recovery processes were commenced after a d starvation period.

The removal of malodorous H 2 S has been traditionally accomplished by using physical or chemical technologies, such as vapor scrubbing, incineration, or adsorption Bouzaza et al. Optimieren der biologischen abluftreinigung VDI 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.

Only a small recirculation pump is need for vaporisation water. It should also be noted rilter a decrease in the biomass was not vital at relatively high biomass concentration. The scrubbing liquid which is circulated over the packing must be checked for pH, nutrients and salt concentration.

Long-term operation may result boitrickling excess biomass formation when nutrient loads and pollutant concentrations are high. 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.

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Re-acclimation processes of four starvation experiments were similar after restarting biotrickling filters. This will help to spare the biotrickling filter. Interruptions are also common phenomena in the industrial operation when plants are periodically shut down or during equipment malfunctions and equipment repair period.

There was one port in each section of the biotrickling filter for carrier sampling and gas pressure measurement. Common uses of a biofilter include processing waste water, capturing harmful chemicals or silt from surface runoff, and microbiotic oxidation of contaminants in air.