(19)

(11)

EP 4 054 985 A1

(12)

(43) Date of publication: 14.09.2022 Bulletin 2022/37 (21) Application number: 20884881.2 (22) Date of filing: 06.11.2020

(51) International Patent Classification (IPC):  C02F 11/15(2019.01) C02F 11/121(2019.01) C02F 11/147(2019.01) F26B 5/02(2006.01) F26B 3/347(2006.01) G01N 21/3563(2014.01) C02F 11/131(2019.01) C02F 11/143(2019.01) F26B 1/00(2006.01) F26B 5/14(2006.01) B01D 61/56(2006.01) (52) Cooperative Patent Classification (CPC): C02F 11/121; C02F 11/131; C02F 11/143; C02F 11/147; C02F 11/15; F26B 1/00; F26B 3/347; F26B 5/02; F26B 5/14; C02F 9/00; F26B 2200/02; F26B 2200/18 (86) International application number: PCT/FI2020/050736 (87) International publication number: WO 2021/089924 (14.05.2021 Gazette 2021/19)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 08.11.2019 FI 20195958 (71) Applicant: Eco WWS Oy 50101 Mikkeli (FI)	(72) Inventors: RAHIKAINEN, Timo FI-36600 Pälkäne (FI) KUUTTI, Juha FI-53300 Lappeenranta (FI) PIIRAINEN, Harry FI-00760 Helsinki (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)