With the ever-increasing water scarcity worldwide, water is becoming more and more precious. And with that, it is becoming very much important to reuse the wastewater. Dutco Tennant LLC believes that the most essential commodity for human life is none other than clean drinking water and always looks out towards adding updated technologies for water treatment to its inventory. We have added a new product into our wide inventory for removing odorous smell without the use of chemicals.
A combination of a biofilter and bio scrubber is known as a biotrickling filter. It is a technique that has been developed for removing H2S and VOC from sewage applications. In the case of hydrogen sulfide, the major component which needs to be removed from foul air from a sewage network, the autotrophic bacteria will oxidize H2S into sulphuric acid that is drained to the network. The bacteria responsible for decomposition are immobilized on a carrier or filter material. This filter material consists of synthetic foam, lava or structured plastic packing. The surface must have a structure that allows biomass to bond it effectively. The carrier material is constantly covered with water which means that water must be uniformly sprayed over the packing. The polluted components absorbed in the liquid film and are decomposed by the bacteria. In order to feed the biomass, the required nutrients are added to the water. This water also carries away excess sludge/biofilm, as well as decomposition products which may hinder the biomass.
The VOC components will be oxidized by heterotrophic bacteria, present at a higher pH. The proper design and selection of the correct media will result in a low-pressure drop and less energy consumption. To moisten the bacteria to drain the sulphuric acid, TSE (treated secondary effluent) can be used. This water may still contain some nutrients which may be beneficial for the bacteria culture in the biotrickling filter. If potable water is supplied, the additional nutrients can be dosed through a dosing system. The scrubbing liquid that is circulated over the packing must be checked for pH, nutrients and salt concentration. The pH can be continuously measured and corrected. The nutrients are constantly dosed and the dosage is periodically checked via analyses. In order to keep salt concentrations within acceptable limits, one section must be discharged and filled with fresh water. This can take place on the basis of conductivity.