The second Waste management expedition will take place on Friday afternoon 26.4. returns to Viikinmäki area, North-west Helsinki, this time to visit Helsinki Region Environmental Services Authority (HSY)’s waste water management centre. Welcome to sign up to join!
The Viikinmäki wastewater treatment plant, the largest in Finland, processes the domestic and industrial wastewater of Helsinki, Kerava, Tuusula, Järvenpää, Sipoo and of the central and eastern districts of Vantaa (in total about 800,000 inhabitants), and is primarily located inside rock. The wastewater treatment process employed is based on the ‘activated sludge’ method (Aktiivilietemenetelmä) and includes three phases: mechanical, biological and chemical treatment. Nitrogen removal has been enhanced with a biological filter that utilises denitrification bacteria. More information below.
Our host will be Mr. Yrjö Lundström, a specialist who knows the sludge process, and the wastewater treatment as well. He will speak English, but of course questions are welcome in Finnish. The tour will take place from 12.00 on site, and lasts 1.5-2 hrs. The tour is free but has a limit of 25 persons. Please sign up here in advance by 25.4.
During this expedition you will need to make your own way there to Hernepellontie 24. We meet outside the main gate. Take public transport bus 68 or 71 there (for example 68 leaving Rautatientori at 11.29 or Arabia at 11.45 will get you there on time). You are advised to wear proper shoes, and a bit warmer clothes than usually, as it is quite cold down there underground, but wearing a bigger coat could be too much.