Incinerator bottom ash (IBA)

Recovering reusable materials from ash

Finding new use for metals and mineral waste products

After incineration, the incombustible components and the inert materials which are no longer reactive remain behind as ash. Metals, alternative building materials and minerals for building materials can be extracted from this ash. Separating out the metals is particularly important here, as they represent a valuable resource. In addition, the mineral content of the ash may not contain any heavy metals if it is to be used as an alternative building material.

BHS offers innovative mixing and shredding technologies for the handling of raw ash and the fine processing of recyclable materials. They are available as both stand-alone solutions and as turnkey systems. Our solution portfolio is based on our years of experience with impact crushing, separation technology and the combining of different power units. You benefit from greater efficiency in breaking up the agglomerated materials and in the subsequent refining. Our goal is to deliver maximum yields.

Benefits at a glance:

  • Selective material separation
  • Customer-specific machine configuration
  • Turnkey system planning
  • Yields high amount of non-ferrous metals suitable for smelting
  • High purity level


Keeping the environment and costs in your sights


Keeping the environment and costs in your sights

Ash from waste incineration plants is becoming an increasingly valuable resource. Demand for metals is growing worldwide, while at the same time regulations on waste disposal are becoming stricter and landfill costs are rising. In addition, the minerals primarily contained in the ash are used in road construction across most of Europe. In this way, recycling boosts the supply of raw materials while also resulting in lower costs and less use of landfill space. 

The right solution for every input material


The right solution for every input material

Each batch of incinerator bottom ash (IBA) is made up of a unique combination of materials. A number of different machines from BHS are used to finely process the ash. The maximum particle size, the desired target size and the required throughput rate all factor in when selecting and configuring the machines. After the material has been processed, it can be separated and refined according to the customer’s requirements.

You can rely on our extensive experience and process know-how. Working together with our customers, we carry out extensive testing on the input material at our modern test center in order to develop a process and system design that best meet their needs. The systems feature a modular design, providing flexibility for modifications and upgrades. Parts of the process can be carried out separately as a standalone solution.

BHS offers tailor-made mixing modules for the stabilization of ash. What sets the BHS single-shaft continuous mixer (MFKG) apart here is the self-cleaning rubber trough, which prevents material build-up on the inner trough wall. This allows you to reduce downtime and achieve maximum efficiency.


Rotorshredder (RS)

Crushing, separation and disaggregation – the rotor shredder can do it all

Impact crusher & impact mill (PB & PM)

Low operating costs coupled with superior crushing performance

Rotor centrifugal crusher (RSMX)

High-performance crushers for hard or abrasive recycling materials

Rotor impact mill (RPMV & RPMX)

Ball shaper operating based on unique crushing principle

Twin-shaft continuous mixer (LFK)

High-performance solution for continuous operation


Tests give certainty

Which technical solution is the right one for your recycling process? Don’t leave anything to chance. Our team of specialists will test your material at our test center and develop a solution tailored to your specific needs.

Success stories

Plant for recycling automotive shredder residues (ASR) in Finland.

July 2017
Kajaanin Romu Oy operates one of Finland’s most cutting-edge plants for recycling scrap in the town of Kajaani, located approximately 500 km northeast of Helsinki. The company commissioned a BHS-Sonthofen plant for processing automotive shredder residue (ASR) fine fractions of particle sizes between 0 and 30 mm. It separates the feed material abundant with valuable metals into ‘light’ and ‘heavy’ fractions in a single pass. This allows the plant operators to economically produce fractions that can be sold profitably. Moreover, the plant significantly reduces the cost of material disposal at landfills.

DHZ AG – Extracting concentrated metals from incinerator bottom ash

July 2016
DHZ AG operates a modern recycling center in Lufingen in the Swiss canton of Zurich. The facility focuses on processing incinerator bottom ash (IBA). BHS-Sonthofen supplemented two existing IBA processing plants with an additional plant that extracts high-quality, heavy and light non-ferrous metal fractions from the coarse concentrate generated upstream. These are of such high quality that they can be sold directly to smelters or to industrial customers.


IE Expo China 2023

4-19-2023 - 4-21-2023

CBRW 2023 | China INTL. Li-ion Battery Recycling Week Summit

5-15-2023 - 5-19-2023

15th China International Battery Fair | CIBF 2023

5-16-2023 - 5-18-2023
Shenzhen World Exhibition & Convention Center

International Congress for Battery Recycling (ICBR) 2023

9-6-2023 - 9-8-2023

Pollutec 2023

10-10-2023 - 10-13-2023

Vakbeurs Recycling 2023

11-21-2023 - 11-23-2023


Brochure of the "Recycling Technology" business unit
"Fine treatment for optimal metal recovery" application flyer

Satisfied customers worldwide


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Find a sales representative

Find your personal contact person on site. We are there for you worldwide.