Odour Abatement

   Odour impact is generally low around Waste Water Treatment Plants (WWTP) when conventional Odour Control Unit (OCU) such as chemical scrubbers or biofilters are implemented. However, for some specific WWTP processes such as sludge thermal drying releasing odorous Volatile Organic Compounds (VOC) in particular aldehydes and ketones, these conventional OCU are not effective enough to avoid odour nuisances in the environment.

   To fix this issue, we have proposed a simple and relevant two stages treatment line to treat odorous VOCs from WWTP. The first step of the treatment line consists of an enhanced water scrubber (absorption) and the second one, an Activated Carbon (AC) filter (adsorption). The enhanced water scrubber, patented by Suez and named AzurairTM Cool, uses a chiller to cool the inlet scrubber water in order to increase VOCs removal in scrubber and dehumidifie air before the second stage of AC filtration.

Gonzalez  In this work, a new biotechnology based on latex biofilms was developed and tested for VOC abatement in the context of indoor air. Four VOCs – hexane, trichloroethylene, toluene and pinene – of different solubilities were selected as model pollutants. A mixed bacteria culture enriched from activated sludge was used as inoculum for the experiments. The removal efficiency (RE) of the pollutants was evaluated for different biofilm mixtures, which involved variations in the water content, the presence of water retainers, the latex pre-treatment, and the biomass concentration.

   Additionally, the influence of the pollutant load was tested. Overall, toluene and pinene REs were high (<90%), while hexane and trichloroethylene did not achieve satisfactory REs (<30%). A high-water content in the latex-biofilm mixture was proven to increase the abatement, especially when provided as nutrient solution.

48 006a   An Odour Attribution Study is undertaken in North America for an Air Quality Management Agency that includes athering data from specific sources and ambient locations to better understand odour impacts within the local communities. Specifically, the following objectives were to be met:

  Identify odorant compounds impacting the area of concern via comprehensive quantitative and qualitative analyses; Determine the relative contribution and variability of the odorant compounds emitted from the three key source facilities; Develop a strategy for continuous real-time odorant monitoring to measure emissions impacting the community from the three key source facilities.

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