EP 1109749 A4 20020130 - IN SITU TREATMENT FOR CONTAMINATED SURFACE WATERS AND PRODUCTS THEREFOR
Title (en)
IN SITU TREATMENT FOR CONTAMINATED SURFACE WATERS AND PRODUCTS THEREFOR
Title (de)
IN-SITU-BEHANDLUNG VON KONTAMINIERTEM OBERFLÄCHENWASSER UND DAFÜR VERWENDETE PRODUKTE
Title (fr)
TRAITEMENT $I(IN SITU) D'EAUX DE SURFACE CONTAMINEES ET PRODUITS A CET EFFET
Publication
Application
Priority
- US 9916692 W 19990730
- US 9501298 P 19980801
- US 36064399 A 19990726
Abstract (en)
[origin: CA2339220A1] This invention is directed to a method for the prevention of growth of aquat ic algae which method comprises adding a quantity of timed-release tablets of a dry particulate composition into the surface water, wherein said tablets comprises: (a) an inner-core comprising at least one live microorganism stra in in dormant condition; (b) an inner-coating over the inner-core of a water soluble substance selected from the group consisting of polyethylene glycol and hydroxypropyl methylcellulose; (c) an outer-layer over the inner-coating comprising sodium sulfate coated sodium carbonate peroxyhydrate particles an d a colorant that reflects light at the same wavelength used in photosynthesis by the algae, thereby prevents the necessary light from penetrating the surface water, and (d) an outer-coating over the outer-layer of a water soluble substance selected from polyethylene glycol and hydroxypropyl methylcellulose.
IPC 1-7
IPC 8 full level
C02F 3/02 (2006.01); C02F 3/34 (2006.01); C12N 11/04 (2006.01); C12N 11/12 (2006.01)
CPC (source: EP)
Y02W 10/10 (2015.05)
Citation (search report)
- [DXY] US 5275943 A 19940104 - DITURO JOHN W [US]
- [Y] US 4042367 A 19770816 - WILSON CHARLES G
- See references of WO 0007944A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
CA 2339220 A1 20000217; EP 1109749 A1 20010627; EP 1109749 A4 20020130
DOCDB simple family (application)
CA 2339220 A 19990730; EP 99938785 A 19990730