公开(公告)号：DE1839817U

公开(公告)日：1961-10-19

申请号：DEF0019094

申请日：1960-09-19

Applicant: FREY WILHELM

Inventor： FREY WILHELM

公开(公告)号：CH110052A

公开(公告)日：1925-09-16

申请号：CH110052D

申请日：1924-08-26

Applicant: FREY WILHELM

Inventor： WILHELM FREY

IPC: A01D34/14

公开(公告)号：CH81806A

公开(公告)日：1919-07-16

申请号：CH81806D

申请日：1919-02-21

Applicant: FREY WILHELM

Inventor： FREY WILHELM

公开(公告)号：CH28979A

公开(公告)日：1904-06-30

申请号：CH28979D

申请日：1903-08-24

Applicant: FREY WILHELM

Inventor： FREY WILHELM

公开(公告)号：DE50302661D1

公开(公告)日：2006-05-11

申请号：DE50302661

申请日：2003-01-16

Applicant: FREY WILHELM

Inventor： FREY WILHELM

IPC: B08B3/08 ,  B01F3/04 ,  B01F15/00 ,  B08B7/00 ,  B08B9/00 ,  B08B9/02 ,  C02F1/72 ,  C02F1/74 ,  C02F3/20 ,  C02F5/08

Abstract: Disclosed is a method for cleaning aeration elements (1) provided with pores or bores in aerated basins (2) of wastewater treatment plants or water treatment plants. The aeration field (4) formed by the aeration elements (1) and the pipes (3) connecting said aeration elements to each other is completely filled with a cleaning agent in a fluid form by applying pressure that is high enough to send said cleaning agent through the pores or bores of the aeration elements (1). After applying the cleaning fluid on the pores or bores of the aeration elements (1) for a variable amount of time, the aeration field (4) is emptied again. In a further optional cleaning step, the aeration field (4) is cleaned once again with a rinsing fluid, preferably water. Also disclosed are the use of an alkaline cleaning agent with a pH value of at least 10, preferably 12, and advantageous compositions of the cleaning fluid used for cleaning aeration elements.

公开(公告)号：AT411359B

公开(公告)日：2003-12-29

申请号：AT692002

申请日：2002-01-17

Applicant: FREY WILHELM ,  THONHAUSER CHRISTIAN A

IPC: B01F3/04 ,  B01F15/00 ,  B08B3/08 ,  B08B9/00 ,  B08B9/02 ,  C02F1/72 ,  C02F1/74 ,  C02F5/08 ,  C02F3/20

Abstract: Disclosed is a method for cleaning aeration elements (1) provided with pores or bores in aerated basins (2) of wastewater treatment plants or water treatment plants. The aeration field (4) formed by the aeration elements (1) and the pipes (3) connecting said aeration elements to each other is completely filled with a cleaning agent in a fluid form by applying pressure that is high enough to send said cleaning agent through the pores or bores of the aeration elements (1). After applying the cleaning fluid on the pores or bores of the aeration elements (1) for a variable amount of time, the aeration field (4) is emptied again. In a further optional cleaning step, the aeration field (4) is cleaned once again with a rinsing fluid, preferably water. Also disclosed are the use of an alkaline cleaning agent with a pH value of at least 10, preferably 12, and advantageous compositions of the cleaning fluid used for cleaning aeration elements.

公开(公告)号：DE1757500U

公开(公告)日：1957-12-05

申请号：DEF0013851

申请日：1957-10-15

Applicant: FREY WILHELM

Inventor： FREY WILHELM

公开(公告)号：CH124223A

公开(公告)日：1928-01-16

申请号：CH124223D

申请日：1926-11-02

Applicant: FREY WILHELM

Inventor： FREY WILHELM

IPC: F21V21/03