Livestock wet scrubber, 2002,1 Absorption in water droplets of odours, ammonia and dust from livestock buildings (=Staldluftvasker) Danish Institute of Agricultural Sciences Dept. of Agricultural Engineering (DIAS-DAE) Aalborg University Institute of Energy Technology (AAU-IET) University of Southern Denmark Institute of Biochemistry and Molecular Biology (SDU-IBMB) The National Committee for Pig Production (DS-LU) Turbovent AS, Aars Solum AS, Hedehusene

Livestock wet scrubber, 2002,2 The scope of the project Interdisciplinary activities (Engineering, agronomy and biochemistry) Strategically designed R & D project Supports a number of PhD/MSc projects Co-operates with two private companies and a pig producers’ organisation The project period is 5 years.

Livestock wet scrubber, 2002,3  Udvikling og spredning af lugt.  Reducering af lugtgener.  Påvirkning af lugtgener. PsykosocialeBiologiske Tekniske Indfaldsvinkler

Livestock wet scrubber, 2002,4 Background Increasing number of large- scale livestock facilities Intensified demand Buffer zone requirement of 300m effects 25% of livestock producers. The total ammonia emission from pig and poultry houses amount to about 32% of the total nitrogen loss from livestock manure. A large number of odorous components are emitted from livestock buildings.

Livestock wet scrubber, 2002,5 More than 90% of the Danish pig and poultry houses use mechanical ventilation systems

Livestock wet scrubber, 2002,6 Objective and vision To obtain the fundamental knowledge needed for the development of the new concept for the wet scrubbers for livestock buildings. Demands for the reduction of offensive odour will be intensified A new concept of wet scrubber will be the technical solution. An extensive application can be expected

Livestock wet scrubber, 2002,7 Vaskesøjlemodul i ventilationsskorsten Vandrensningsanlæg Varmepumpe

Livestock wet scrubber, 2002,8

9 Despite the fact that the wet scrubber is a well-known technology; it is not directly applicable in livestock buildings, due to the following specific conditions: Ventilation air and, thereby water, contains organic dust, ammonia and low concentrations of many different odorous components. (multiple pollutants) A relative large amount of water will be needed. The wet scrubber performance should be effective at variable air volumes, controlled by the ventilation system. The requirement for reduction of offensive odour and dust emission depends on the wind direction and the relative location of livestock buildings and neighbouring houses.

Livestock wet scrubber, 2002,10 Lab. Model 2 Lab. Model 1 WP 2 & 3 Basic data for description of the absorption of odorous components in water droplets Vanddråbers størrelse, Dyse tryk, Slip hastighed, Vand - luft temperatur, Vandmængde, Luftmængde Absorptionshastighed, Absorptions effektivitet, Tab af vand, Tryktab i søjle, Varmegenvinding

Livestock wet scrubber, 2002,11 Styringssystem Vandforsynig med trykreguleringVarmepumpe Vejrforhold Temperatur, Fugtighed (regn eller tørvejr), Vindretning Ventilationsanlæg Temperatur/fugtighed, Luftydelse,,, Absorptionssøjle Dyse tryk, Vandmængde, Vandtemperatur, Lufttemperatur, Luftfugtighed, Rensning af søjle,,, Vandrensningsanlæg Næringsforhold, Temperatur, BOD, COD, pH,,, WPO 5. Methods for strategic and intelligent control of wet scrubbers and ventilation units in livestock buildings.

Livestock wet scrubber, 2002,12 Project organization  Project network in the framework of “Sustainable technology in agriculture”  DaNet  The Royal Veterinary and Agricultural University (PhD projects) Research institutes DIAS- DAE AAU-IET SDU- IBMB PhD/MSc Projects VCTS 1 PhD pos. VCTS 1 PhD pos. Work packages WP1: Characterization of odors. WP2: Description of the absorption of odors in water droplets WP3: System design of absorption column WP4: System design of water purification module WP5: Control of wet scrubbers and ventilation units Private companies & organizations The National Committee for Pig Production Turbovent A/S SOLUM A/S