04333837 is referenced by 50 patents and cites 7 patents.

Process for the purification of water that is polluted with diffuse substances originating from ablation, such as fertilizers, mineral and soil particles, oils, wastes, detergents, and primarily inorganic substances, which might accelerate undesirable entrophication of the receiving waters such as lakes, comprising the steps of introducing the polluted water to be purified into a defined area (e.g. a basin); spreading the water cross-wise to increase its surface area; and extracting the diffuse pollutants by applying a biological treatment by the expedient of at least one group of suitable aquatic plants. An apparatus for performing the process comprises means that provide a flow path for the water; at least one dividing structure that performs the spreading; and at least one aquatic plant region, with at least one plant zone, wherein the plants contribute to the above-mentioned biological treatment. Several optional procedural and structural details are also disclosed.

Title
Water purification process and apparatus
Application Number
929275
Publication Number
4333837
Application Date
February 11, 1980
Publication Date
June 8, 1982
Inventor
Lajos Felfoldy
Budapest
HU
Karoly Rozsavolgyi
Budapest
HU
Katalin Babos
Budapest
HU
Sandor Plosz
Budapest
HU
Agent
Gabriel P Katona
Assignee
Varosepitesi Tudomanyos es TervezoIntezet
HU
IPC
C02F 3/32
View Original Source