1
Sandor Plosz, Katalin Babos, Karoly Rozsavolgyi, Lajos Felfoldy: Water purification process and apparatus. Varosepitesi Tudomanyos es TervezoIntezet, Gabriel P Katona, June 8, 1982: US04333837 (50 worldwide citation)

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 l ...


2
Lajos Felfoldy, Sandor Jakab, Sandor Plosz: Method for protecting lakes against eutrophization caused by subsoil water a dam is built on a layer below the bottom of a lake, i.e. on the impervious layer, to stem. Varosepitesi Tudomanyos Es Tervezo Intezet, LUO HONG LIN BAINAN, January 17, 1987: CN85101234

The whole cross section of the subsoil water flow. The top of the dam is 1.0~1.5 meters lower than the highest level of subsoil water. The dam makes the underflow rise to the surface layer of soil and leads the water which needs purification to the culture clump of the water plants. The purpose is t ...