Project meeting of STEP at the site of the company ATS - Agro Trading & Solutions in Hardegsen (Photo: DBFZ)

Biomass furnace Heat

Project ID 03KB128

SCRCOAT - Optimization and validation of combined reduction methods of particulate matter and acidic pollutants in biomass combustion

SCR-Filter (Photo: DBFZ)


  • 01.09.2017 – 28.02.2021


DBFZ Deutsches Biomasseforschungszentrum gemeinnützige GmbH
Torgauer Straße 116
04347 Leipzig

Mario König – direct contact & project coordinator
Telephone: +49-(0) 341 2434 569

Mirjam Müller – further project member
Telephone: +49-(0) 341 2434 473


03KB128B - Dr. Weigel Anlagenbau GmbH
03Kb128C - Fraunhofer Institute for Factory Operation and Automation IFF
03KB128D - Hellmich GmbH & Co. KG
03KB128E - Industrietechnik Barleben GmbH
03KB128F - Universität Paderborn
03KB128G - A.P. Bioenergietechnik GmbH

Associated partners

Cooperation partners



Final report only available in german.

Key results:

  1. The incineration of biogenic residues and waste materials causes increased emissions of dust, NOx, SO2 and HCl compared to wood fuel.
  2. In order to comply with statutory emission limit values, waste systems require a downstream exhaust gas cleaning system, which enables a reduction of all relevant groups of pollutants.
  3. The combination of fabric filter, SCR catalyst and dry sorption enables a cost- and space-saving reduction in emissions in decentralized systems that use biogenic residues.
  4. The exhaust gas temperatures, which are limited for reasons of efficiency, limit the reduction performance of the SCR catalytic converters used to a maximum of 50%. In order to achieve higher reduction rates, it is necessary to develop new types of SCR catalytic converters for the low temperature range.
  5. The pre-coating of the fabric filter enables acidic exhaust gas components to be reduced. During implementation in practice, however, careful attention must be paid to compliance with the necessary operating parameters to make sure the precoating can achieve the desired reduction performance.


The topic of the project is to enable the energetic use of biogenic residues and waste materials in compliance with current and future stricter limits. The exhaust cleaning process should be applied in the power range up to 5 MWth on combustion plants operated with biogenic residues and waste.


The aim of the project is to develop and test a cost-effective process for the combined reduction of fine dust, nitrogen oxides, HCl and SO2 as well as dioxins and furans. The reduction processes for individual pollutants existing in the power plant sector cannot be applied economically on decentralized biomass plants. Therefore the approach of the project is to combine different processes in one compact module, thus saving investment and operating costs in order to make the economical use in small and medium-sized plants possible.



  • Duration and evaluation of combustion tests to determine the efficiency of the developed exhaust cleaning method

Hellmich GmbH & Co. KG

  • Design and construction of a fabric filter prototype for field experiments

Dr. Weigel Anlagenbau GmbH

  • Optimization and retrofitting of a fabric filter on a technical scale

Industrietechnik Barleben GmbH

  • Further development and optimization of the dosing system for reducing agent and precoat material

Universität Paderborn

  • Laboratory tests precoat materials

Fraunhofer IFF

  • Design and realization of process control technology

A.P. Bioenergietechnik GmbH

  • Duration of field measurements for process validation



  • Project coordination, combustion tests

Hellmich GmbH & Co. KG

  • New fabric filter

Dr. Weigel Anlagenbau GmbH

  • Retrofit fabric filter

Industrietechnik Barleben GmbH

  • Dosing equipment

Universität Paderborn

  • Precoat material

Fraunhofer IFF

  • Process control

A.P. Bioenergietechnik GmbH

  • Field measurements


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