Development and construction of customer-specific drying systems for biomass and organic bulk materials.
W. Kunz dryTec AG (SWISS COMBI)
Dintikon (CH) · Head office, manufacturing and warehouseNew on Amplifa
About SWISS COMBI
W. Kunz dryTec AG, based in Dintikon (Aargau), has been developing and building customer-specific industrial drying systems under the SWISS COMBI brand since 1959. The product portfolio includes the belt dryer for biomass and organic bulk materials such as wood chips, sawdust, grass and alfalfa, the low-temperature belt dryer (NTT) with waste heat utilisation, the indirectly heated ecoDry drum dryer for animal feed and sewage sludge, as well as the ecoFertiliser Plant (eFP) for processing liquid and solid digestate into fertiliser granulate or pellets. The offering is complemented by engineering services (energy optimisation, capacity and performance increases, modular plant extensions), pilot/test systems for drying trials, as well as customer service, maintenance and spare parts distribution. The Swiss family business, now run by the third generation, supplies customers from over 50 countries in industries such as the sugar industry, animal feed, biogas, dairy, ethanol and starch industries, biomass/wood and sewage sludge disposal.
- Site
- Dintikon
- Processes
- Belt drying of biomass/wood chips/sawdust and organic bulk materials, Indirectly heated drum drying (ecoDry) for animal feed and sewage sludge, Processing of liquid and solid digestate into fertiliser granulate or pellets (ecoFertiliser Plant), Low-temperature belt drying (NTT) with waste heat utilisation, e.g. sugar beet pulp, Drying trials/test runs with pilot dryers (test belt dryer and test ecoDry), Drying trials with superheated steam (test ecoDry), Engineering: design and construction of customer-specific drying systems, Energy optimisation (exhaust gas/waste heat utilisation for drying) and capacity increase/extension
- Materials
- Biomass / wood chips / sawdust / planer shavings / wood shavings, Grass / alfalfa / fodder maize, Maize mash / wheat mash, Pomace (apple pomace), Sugar beet pulp, Bagasse (sugarcane), Liquid and solid digestate / press water / slurry, RDF / Alternative Fuels (AF)
- Certificates
- Test systems for product qualification, Inspection and overhaul service, Original spare parts warehouse at company headquarters
- Founded
- 1959
- Industries
- Biomass/wood, Animal feed (alfalfa, grass, fodder maize), Sugar industry, Biogas/digestate, Dairy industry, Ethanol and starch industries
- 01
Engineering / design of customer-specific drying systems
- 02
Test runs with pilot dryers (test belt dryer, test ecoDry)
- 03
Manufacturing of key components (at S Combi AG)
- 04
Assembly and commissioning
- 05
Customer service, inspections, overhauls and spare parts distribution
Raw Materials and Products
Biomass (wood chips, forest wood chips, sawdust, planer shavings, wood shavings)
Gentle drying in the SWISS COMBI belt dryer with hot air.
Grass, alfalfa, fodder maize
Raw materials for the production of storable animal feed.
Maize mash, wheat mash
Drying in the ethanol and starch industries, among others with the ecoDry drum dryer.
Sugar beet pulp
Drying in the low-temperature belt dryer (NTT) with waste heat from the sugar production process.
Liquid and solid digestate, press water, slurry, whey digestate
Processing into marketable fertiliser granulate or pellets in the ecoFertiliser Plant (eFP).
RDF / Alternative Fuels (AF)
Refuse-derived fuels as drying material for energetic recovery.
Sewage sludge
Odour-neutral drying in the indirectly heated ecoDry drum dryer.
Pomace (e.g. apple pomace), bagasse, slaughterhouse waste
Organic by-products that are dried into a storable product.
Locations
Dintikon
CHHead office with engineering, manufacturing (key components), test systems and spare parts warehouse
- Materials
- Biomass, animal feed raw materials, digestate, sewage sludge
- Belt dryer (SWISS COMBI)
- Low-temperature belt dryer (NTT)
- ecoDry drum dryer
- ecoFertiliser Plant (eFP)
- Test belt dryer
- Test ecoDry (drying with superheated steam)
- KUVO dust filter/pre-dryer
- Cubing press
Dryer and Plant Programs
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Belt drying of biomass/wood chips/sawdust and organic bulk materialsDrying/Process engineering | – | – | – | – | Biomass, Wood chips, Forest wood chips, Sawdust, Planer shavings, Wood shavings, Grass, Alfalfa, Fodder maize, Maize mash, Wheat mash, Pomace, Sugar beet pulp, Bagasse, Liquid digestate, Solid digestate, Press water, Slurry, Slaughterhouse waste, RDF/alternative fuels |
| Indirectly heated drum drying (ecoDry) for animal feed and sewage sludgeDrying/Process engineering | – | – | – | – | Grass, Alfalfa, Maize, Wood shavings, Sewage sludge, Animal feed |
| Processing of liquid and solid digestate into fertiliser granulate or pellets (ecoFertiliser Plant)Drying/Process engineering | – | – | – | – | Liquid digestate, Solid digestate, Slurry, Whey digestate |
| Low-temperature belt drying (NTT) with waste heat utilisation, e.g. sugar beet pulpDrying/Process engineering | – | – | – | – | Sugar beet pulp |
| Drying trials/test runs with pilot dryers (test belt dryer and test ecoDry)Testing | – | – | 5 kg sample | – | Organic bulk materials, Various products for drying tests |
| Drying trials with superheated steam (test ecoDry)Testing | – | – | – | – | Organic products |
| Engineering: design and construction of customer-specific drying systemsEngineering | – | – | – | – | – |
| Energy optimisation (exhaust gas/waste heat utilisation for drying) and capacity increase/extensionEngineering | – | – | – | – | Biomass |
| Customer service, maintenance, inspections, spare parts distribution and overhauls of drying systemsAssembly | – | – | – | – | – |
8 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Belt dryer (SWISS COMBI) | SWISS COMBI / W. Kunz dryTec AG Belt dryer | – | – | – | Dintikon (manufacturer) |
| Low-temperature belt dryer (NTT) | SWISS COMBI / W. Kunz dryTec AG NTT | – | – | 1983 (erst | Dintikon (manufacturer) |
| Indirectly heated drum dryer | SWISS COMBI / W. Kunz dryTec AG ecoDry | – | – | 1989 (Erfi | Dintikon (manufacturer) |
| Plant for digestate recovery into fertiliser granulate/pellets | SWISS COMBI / W. Kunz dryTec AG ecoFertiliser Plant (eFP) | – | – | – | Dintikon (manufacturer) |
| Pilot/test belt dryer | SWISS COMBI / W. Kunz dryTec AG Test belt dryer | – | – | – | Dintikon |
| Pilot drum dryer (drying with superheated steam) | SWISS COMBI / W. Kunz dryTec AG Test ecoDry | – | – | – | Dintikon |
| Dust filter/pre-dryer | SWISS COMBI KUVO | – | – | ab 1980er | Dintikon (manufacturer) |
| Cubing press (grass into feed pellets) | SWISS COMBI | – | – | 1967 | Dintikon (manufacturer) |
Additional services
Reference customers
Quality
The quality and suitability of drying for new products are tested in advance under realistic conditions with the company's own pilot dryers (test belt dryer, test ecoDry with superheated steam), usually starting with a 5-kg sample. A dedicated after-sales department, regular inspections with inspection reports and original spare parts ensure long-term plant operation.
| Evidence | Dintikon |
|---|---|
| Test systems for product qualification | |
| Inspection and overhaul service | |
| Original spare parts warehouse at company headquarters |
History
- 1959
Foundation of W. Kunz AG by Werner Kunz sen.; first SWISS COMBI grass drying system built
- 1965
First system for drying sugar beet residues installed in a sugar factory in Denmark
- 1967
Expansion of the Dintikon factory site with a warehouse building; Werner Kunz jun. takes over company management
- 1980er
Development of the 'KUVO' dust filter with pre-drying by Werner Kunz jun.
- 1983
First two low-temperature belt dryers commissioned in two sugar factories; use of waste heat from the sugar process
- 1989
Invention of the ecoDry drum dryer for odour-neutral sewage sludge drying in Biel; one year later eight systems in France, Germany and Switzerland
- 1995
Restructuring: sewage sludge division sold to SC Technology AG (SCT), production spun off as S Combi AG, engineering continued as W. Kunz dryTec AG
- 2006
Markus Kunz joins the family business as COO
- 2011
Markus Kunz takes over the majority of shares and manages the company as CEO