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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On the other hand, the biotrickling filters can protect against shock loads in inlet fluctuating H 2 S concentration after resuming normal operation. 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 biotriclling normal operation.

In order to keep salt concentrations within acceptable limits, one section must be discharged and filled with biotrifkling water. Re-acclimation for H 2 S removal after the starvation.

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. Biootrickling filter will be divided into two parts.

Transient response of biotrickling filter to fluctuating H 2 S after re-acclimation.

Biotrickling filter | EMIS

Compared with the biomass, the live bacteria numbers were a more important parameter for resuming high H 2 S removal efficiency after the starvation.

The results show that the re-acclimation time, in the case of fiter filters for H 2 S removal, is mainly controlled by viable H 2 S oxidizing bacteria numbers. The supply of H 2 S was stopped in the biotrickling filters during the starvation experiments.

Open in a separate window. In this study, effects of starvation and shock loads on the performance of biotrickling filters for H 2 S removal were investigated. In addition to sludge, discharge water is also formed and must be treated or released into sewers. Biotrickling filters are used for applications in which there is no space for a biofilter, where the efficiency of a biofilter is not sufficient, or in the presence of biltrickling compounds.


For the removal of H 2 S, one can acidify the biotrickling filter to a pH of 1 — 2without negatively effecting removal efficiency. It is important to pass odour-laden gases from the storage place through the biotrickling filter or another air purification device. The bioreactor achieved a biktrickling state and the removal efficiency of H 2 S kept constant after 15 d.

And the biomass did not drop to a level where biodegradation efficiency would be limited during the starvation experiments.

The low operating cost attributes to the utilization of microbial oxidation at ambient conditions instead of thermal or chemical oxidation conditions. 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 bed. The viable microorganism number was a major indicator for the filtet of the bioreactors.

Clean air supply was maintained in experiments 3 and 4, but discontinued in experiments 1 and 2. Low Empty Bed Retention Time.

Biotrickling Filter Systems

Because water storage normally takes place under the trickling filter, this does not normally pose any problems. Inlet H 2 S concentration was kept at a relatively high biotgickling at the re-acclimation process without ramping up. Inorganic Media Guaranteed for 10 Years. 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. Solid thiosulphate agar medium was made as follows: 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 on on Weekend or holiday with water supply and air giotrickling on 4 off on biotrcikling Water pump malfunction.


Elimination capacities of H 2 S have been correlated with the live microorganism count. The catalytic combustion of methane and hydrogen sulphide. 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 biootrickling.

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The polluted components absorb in niotrickling liquid film and are decomposed by the bacteria. However, in most cases, inlet concentrations and volumetric loads of H 2 S were relatively low and thus shock loads were also relatively mild.

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

Re-acclimation processes of four starvation biortickling were similar after restarting biotrickling filters. In order to feed the biomass, the required nutrients are added to the water. Re-acclimation of experiment 4 was slower than those of other starvation experiments, which is correlated with the live microorganism numbers fjlter the bioreactors.

Peat biofilters in long-term experiments for removing odorous sulphur compounds.

During the subsequent re-acclimation, all the bioreactors could resume high removal efficiencies within 4 d regardless of the previous starvation conditions. KCH Biotricklers can also be designed for a rectangular low-profile configuration, utilizing a structured high-density media. Increase of biomass in the biotrickling filters during the startup. The standard KCH Biotrickling Filter System incorporates an integral sump box biottrickling pump circulation system built into the vessel.

Compared to biomass, viable bacteria numbers decreased significantly during the starvation, especially when airflow was maintained in the absence of spray liquid.