AZ Damiaan in Oostende
Project specifications
Location
City of Ostend - Konterdamkaai
Client
Verstraete.team
Contractor
DC Industrial
Technique
Groundwater treatment for tar oil pollution
Period
November 2022 to August 2023
Equipment
Mobile physico-chemical groundwater treatment plant
Contact person(s)
Jef Ackx and Jonatan Wouter
Description of the works
From 1898-1909 the site served as a creosote yard for railway sleepers. From 1910 to 1958, the site was owned by the Belgian state and served as a city sewer cleaning site and city school service workshop. The demolition of the industrial buildings started in 1958.
A hospital has been located on the site since 1977. The hospital is now building an additional urgent care centre. Due to these civil works, soil and groundwater remediation was necessary. The polluted soil excavation was executed underneath a large canopy with an air filtration system. Tar oil and especially naphthalene can cause great odour nuisance. For this reason, the atmosphere had to be controlled.
Our added value
DC ENVIRONMENT installed a mobile physico-chemical groundwater treatment plant. Using the laws of physics and chemistry, creosotes (tar oil) and BTEX are removed from the pumped groundwater. The installation contained:
- 2 oil water separators
- A mixture tank with air flotation
- 2 dosing systems for chemical mixing
- Lamella separator
- Sand filter with automatic backwashing
- 2 Active carbon filters
Hydraulic capacity: 50 m³/day
DC ENVIRONMENT also installed a large ventilation system connected to 2 giant carbon filters. Each hour 30 000 m³ of polluted air was extracted from in the canopy and filtered by activated carbon. By this means the atmosphere outside the tent was clear and odour free.
- Ventilator 37 kW; 30 000 m³/h
- 2 activated carbon filters containing each 18 m³ of carbon / filter.