Dr Heinrich Mannebeck, the German pioneer of olfactometry, died at 86 on 29 Dec. 2022. As an agriculture scientist, he started in 1976 with a simple olfactometric device to take ambient indoor and outdoor samples of clearly noticeable concentrations. Then, 20 years later, he founded the company Ecoma with his children Dorothee and Dietmar Mannebeck. This company was initially based in Kiel, but 2 years later was moved to  a detached house between farms and apple trees in the little town of Honigsee.

  In the 1970s, the urban exodus began in Germany. Many moved to the countryside with their families. At first, they still found the smell of manure, animals and stables pleasant, but at some point, it became annoying. More and more complaints came across the desk of Dr Heinrich Mannebeck, a member of staff at the Institute of Agricultural Process Engineering at Christian Albrechts University in Kiel. But there were no methods of measuring odour at that time.

   During 2018, Chile began to generate quality standards for offensive odors. The priority of the authority was defined by type of activity and the historical number of complaints per year raised by citizens for every type of industry. From the analysis, five industries were selected for the first stage, among which the Chilean Kraft pulp industry was part of, activity representing approximately 2% of world production.

   Facing complaints, the lack of development planning and land use, the absence of quality standards the null international and bibliographic experience of how to proceed with odor management in this type of industry contributed to creating the necessary need to generate online, integrated, prompt response tools that could allow the odor impact to be managed efficiently in real time.

   Transporting liquid waste is a continuously growing activity in several industries. This transportation is made in trucks and sea containers. Often, the liquid transported contains Volatile Organic Compounds (VOC) and odours. The process of washing and cleaning the truck tanks usually involves the emission of odours and VOCs. The aim of this study was to evaluate the odour abatement efficiency of a multistage hybrid approach consisting of alkaline scrubbing, condenser, adsorption with impregnated Al2O3 + active carbon (AC), and the injection of a deodorizing product to abate odour and VOC emission. In addition, the second aim of this study was to show that the use of these sequential technologies reduce VOC emissions below the limit of 100 mg/m³ set in the environmental authorisation.

   Before the abatement system was installed, VOC concentration was measured over a week averaging 200 mg/Nm³. After the installation of the abatement system, the results showed that the average VOC concentration was always well below the legal limit. In addition, when washing activities took place, the odour concentration measured at the inlet, and outlet of the abatement system was 5000 ouE/m3 and 150 ouE/m3, respectively. This was a 97% odour abatement efficiency.

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