Tholander Ablufttechnik GmbH
About
Tholander Ablufttechnik GmbH, founded in 1986 and based in Viernheim near Heidelberg, Germany, is a leading manufacturer of odor removal and exhaust air purification systems for industrial and municipal applications. ISO 9001:2015 certified, the company has delivered over 800 reference installations across more than 30 countries. Tholander's technology portfolio spans three platforms: biological treatment, wet separation, and adsorption. The biofilter uses microorganisms on organic filter material to degrade odorous compounds, operating cost-effectively at ambient temperature and neutral pH with integrated pre-scrubbers that humidify exhaust air to 98% relative humidity and can dose chemicals for pre-separation of ammonia and hydrogen sulfide. The counter-current scrubber achieves over 99% separation efficiency using chemical additives in a packed column design. The crossflow scrubber provides compact multi-stage treatment in a single housing with independent scrubbing water systems per stage. The multi-venturi scrubber handles dust separation through wet impaction, while the biotrickling filter combines biological degradation with wet scrubbing on inert packing media. Activated carbon filters provide final polishing for residual VOCs and trace contaminants. Tholander typically combines chemical pre-scrubbers with biofilters in integrated treatment trains that protect biofilter biology while achieving high overall removal efficiency. Major reference projects include the 82,000 m³/h composting plant in Martinique and the 60,000 m³/h sludge treatment biofilter at Bern WWTP, Switzerland.
Key Products
Biological exhaust air purification system that uses microorganisms on organic filter material to break down odorous compounds cost-effectively, with integrated pre-scrubber for humidification and chemical pre-separation, achieving optimal performance at 15–40°C and neutral pH.
Wet separation system where exhaust air flows countercurrent through a packed column sprinkled with scrubbing liquid, achieving over 99% separation efficiency with chemical additives (oxidizing agents, acids, alkalis) for removal of HCl, HF, SO₂, NOx, H₂S, ammonia, and VOCs.
Compact horizontal-flow wet scrubber configurable as 1-, 2-, or 3-stage in a single housing, with each stage having independent scrubbing water (e.g., acidic for NH₃, then alkaline-oxidizing for H₂S), ideal for complex multi-pollutant exhaust air streams.
High-efficiency wet dust separation system using multiple venturi throats where exhaust air accelerates through water-laden zones, capturing fine particulates through impaction for effective dust and aerosol removal.
Space-saving biological exhaust air treatment system that combines biological degradation with wet scrubbing, using microorganisms growing on inert packing media irrigated with recirculating water to remove odorous and biodegradable compounds.
Adsorption-based fine cleaning system using activated carbon media for final polishing of exhaust air, removing residual VOCs, odorous compounds, and trace contaminants that pass through upstream biological or chemical treatment stages.
Integrated treatment trains where chemical scrubbers pre-treat exhaust air to reduce H₂S, NH₃, and acidic compounds before biological polishing in biofilters, achieving high overall removal efficiency while protecting biofilter biology and minimizing operating costs.
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