Air scrubber counterflow
Air scrubbers Oilmills
Twostage gas scrubber
Oxidative counterflow air scrubber
Odor control scrubber (oxidative scrubber) for industrial emission treatment (air pollution treatment and odor control
Odour nuisance and odour measurement
Odour nuisance is a complex matter. In our densely populated country, companies are often confronted with complaints about odour nuisance. And often, it’s not at all clear right away which company, out of an industrial area, is causing this odour nuisance. For all the parties concerned, it is important not only to find the origin of the problem, but also to measure the odour nuisance in an objective way and to map the odour dispersion exactly, before taking any further steps. Neutral odour experts are the right people for this job : e.g. sniff measurements can be carried out This way, taking the meteorological circumstances and odour spread models into account, the odour source can be defined, as well as its impact on the surrounding areas.
A sampling of the industrial emissions will allow to identify by chemical analysis (gas chromatography – GC-MS) the harmful components and their concentrations, as well as the odour producing components. Olfactometry tests can be carried out as well (measurement by an odour panel, for an objective report on the odour concentration, report based on a number of well-defined criteria).
Odour nuisance is a complex matter, its solution is equally complex. There is no standard solution for an industrial odour nuisance problem. It’s an utopian thought to believe that odor emissions out of industrial manufacture can be reduced to zero. But most of the time, however, it is possible to find an economic and technically feasible solution. This requires knowledge and experience. Especially for odour problems, it is important to choose for a well-considered and technologically sound solution. Merely install a gas scrubber or filter or use an odour masking product, will hardly ever allow to obtain a good result. An experienced partner will have an accurate look at the problem and offer you an intelligent solution, custom-made for your company, and perfectly integrated in your specific manufacturing process. Seen the complexity of this matter, it is sometimes recommended to carry out some tests with a pilot plant, during a certain period. This way, a “theoretic best solution”, can prove itself in practice. During the test period, samples can be taken and the installation can be adjusted, if necessary. Especially for more complex odor treatment problems, this kind of pilot scrubber installation, will offer the customer as well as ourselves surety about the results to be obtained.
Odour treatment installation (full scale) put into practice
If the odour problem didn’t turn out too complex in the study stage and under certain circumstances, it is possible to consider the biofiltration solution, in that case, we are mainly talking about odour nuisance from waste water treatment installations and coming from the agro-industry (composting, food industry, meat processing and fish processing industry).
If however, the study stage is showing the need for a gas scrubber or gas scrubbing installation, it should be considered, under the circumstances described above, to carry out some pilot tests. This is, of course, not always a must, but is certainly indicated for going straight out to a final solution for the odour problem. Taking into account the cost and the vexation caused by incomplete solutions, the cost for the rent of a pilot installation is to be neglected.
More information about the working principle of gas scrubbers in general can be found on the relevant page. In the oxidative gas scrubbers used for odour treatment applications, the gas emission carrying odour components is washed or scrubbed with water, with added oxidizing chemicals (e.g. sodium hypochlorite, hydrogen peroxyde).
According to the flow direction of the off-gases with regards to the washing liquid, there are counterflow scrubbers (water and gas are moving in opposite directions) and there are crossflow scrubbers (water and gas are moving in cross directions). For certain applications, a combination of both types will be the best solution.
Heat recovery system in combination with air scrubber installations – green energy out of gas emissions for energy cost reduction
Most types of air scrubbers can be optionally provided with a heat recovery system. The heat recovered can be used to increase for instance the temperature of all kinds of process water (see also our process water – membrane filtration section). This kind of heat recovery system allows to considerably cut energy costs. It would be highly regrettable to waste the heat out of your production process, considering the actual energy cost. It goes without saying that the integration of heat recovery systems can also be realized as part of a gas scrubbing optimization project (optimization of existing gas scrubbers).