+44 (0) 1923 729126
The Mansion, Building Research Establishment, Bucknalls Lane, Watford, Hertfordshire, WD25 9XX, United Kingdom

Full acoustics package for DSM Botlek compressor

About project

A wide range of measures for controlling noise emissions has been implemented for a DSM compressor in Botlek. It now has a watertight sound-insulating housing and silencers.


To reduce the compressor's noise emissions, DSM asked for a full package of measures:

  • Sound-insulating housing
  • Intake filter
  • Silencer

Merford supplied a sound-insulating, watertight housing suitable for outdoor use. The housing is fully fitted with a steel construction, lighting, EPDM roofing, rainwater drainage and all other required facilities. 

In addition to the housing, a filter housing for Trox pre and post-filters and an anti-icing system were also supplied. Finally, the sound was reduced by using a stainless steel 304 blow-off silencer. This reduces the noise from 141 dB(A) after the valve to 80 dB(A), at a distance of 1 metre. This met the acoustic requirement. The entire unit was installed subject to the strict rules of the SCC safety certificate.

Noise reduction of sugar beet production by Suiker Unie achieved through screen and enclosures

Suiker Unie develops, produces and sells sugar and specialty sugar products. Its factories are among the most modern in the world. In 2017, the European sugar market regulation expires, which means the production capacity can be increased by 25 per cent. In response to this production expansion, the Suiker Unie factory in Dinteloord will gradually be extended. To reduce the factory’s noise pollution to a minimum for the environment, action was needed. Merford supplied five acoustic enclosures for the transport screws and pulp presses.

Sound permit

Suiker Unie hired engineering consultants Peutz to find out if any action needed to be taken to restrict the noise levels in the environment. The company concluded that the five new transport screws and two pulp presses needed sound insulation to comply with the permit. The sugar manufacturer asked Merford to find the appropriate solutions.

Casings and acoustic screen

After discussions with Suiker Unie and Peutz, Merford designed and produced five type SKS acoustic enclosures for the electro motors and gearboxes of the transport screws. Discussions between Peutz and Merford led to the conclusion that placing an acoustic screen was all that was needed to achieve the required level of noise reduction for the pulp presses. Additionally, this would make it easier to carry out the various service tasks. The two pulp presses will now be protected by a type G14/EP sound barrier. The screen has been designed so there is room for a third pulp press to be installed in the future if required. The five enclosures for the transport screws were assembled in Merford’s production facility in Gorinchem and delivered ‘crane-ready’. This made it easier to position them, considering the height of the noise sources. For servicing, the electro motors and gearboxes are still easily accessible.


Due to the beet season which is soon to start, the project had to be completed very quickly. This led to the enclosures all being put into position in just one day. After the installation, the sound checks carried out by Peutz showed that the required noise level reductions had been easily achieved. Suiker Unie was pleased that the project was completed in a short period of time and that the permit was granted.

Discover innovation

Register your interest today