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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The carrier material is constantly covered with water. During the subsequent re-acclimation, all the bioreactors biotrjckling resume high removal efficiencies within 4 d regardless of the previous starvation conditions.

Quantity is determined by the load and composition of flue gases.

The bioreactor could resist the shock of high loads under relatively stable biomass content at the end of acclimation phase. This was different from the startup phase of the bioreactor. The bacteria responsible for decomposition are immobilised on a carrier or filter material. J Zhejiang Univ Sci B. Samples were then put into physiological saline solution 0.

Only a few studies discussed the effects of starvation and shock loads on the performances of biofilters for H 2 S removal. One must be careful when buffering spray water. The airflow rate was kept at 6.

In order to feed the biomass, the required nutrients are added to the water. This will help to spare the biotrickling filter.

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.

The filter material consists of synthetic foam, lava or a structured plastic packing.

Hence, periods of starvation associated with a decrease of biomass would not decrease the lifespan of the biotrickling filter.

Compared with other experiments, the live bacteria number was similar at the end of experiments 1 and 2 16 to 24 d in Fig. Samples were taken at same depth 35 cm from the biotrickling filters described above. Elimination capacities of H 2 S have been correlated with the live microorganism count.


This mean that water must be uniformly sprayed over the packing. Inorganic Media Guaranteed for 10 Years. Optimieren der biologischen abluftreinigung VDI The dry biomass in the bioreactors was determined by regularly sampling the carrier with biofilm at same depth 35 cm. The momentary response of the bioreactor to these abrupt changes in inlet concentration is presented in Fig. Schematic diagram of biotrickling filter system 1: On the one 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 nutrients are constantly dosed and dosage is periodically checked via analyses. Treatment of odor containing hydrogen sulfide released in the wastewater of pharmaceutical company by high efficient bioreactor with the packed stuffing. And the biomass did not drop to a level where biodegradation efficiency would be limited during the starvation experiments. Common uses of a biofilter include processing waste water, capturing harmful chemicals or silt from surface runoff, and microbiotic oxidation of contaminants in air.

Thus the sulfur oxidizing bacteria were enumerated during the starvation experiments. If the blockage is too severe, the packing will have to be replaced. To safeguard the process, a temperature measurement can be taken for flue gases, if there is a likelihood of temperatures exceeding required limits.

National Center for Biotechnology InformationU. 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 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. Effects of periods of starvation and fluctuating hydrogen sulfide concentration on biofilter dynamics and performance.


Biofilters and Biotrickling filters | SOS Hygiene

A biotrickling filter is biotrickping combination of a biofilter and a bioscrubber. 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.

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. Peat biofilters in long-term experiments for removing odorous sulphur compounds. This article has been cited by other articles in PMC.

Received Mar 1; Accepted Jul 1. The nutrient solution of spray water was as follows: B are provided here courtesy of Zhejiang University Press. However, it should be noted that high liquid trickling velocity could also result in biomass loss due to liquid shear stress. Skip to main content. Hydrogen sulfide adsorption and oxidation onto activated carbon cloths: Compared to biomass, viable bacteria numbers decreased significantly during the starvation, especially when airflow was maintained in the absence of spray liquid.

Therefore, the biofilm containing fklter bacteria was bioteickling formed on the surface and in the pores of the carriers.

There was one port in each section of the biotrickling filter for carrier sampling and gas pressure measurement. 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.