波兰金融投资中心向驻波兰使馆科技处推荐水处理项目，项目的英文介绍资料附后。

NEW GENERATION OF HIGH-EFFICIENCY

DRAIN PIPES FOR DRAINAGE

AND IRRIGATION

In the new construction the filtrating element is in the form of a special lining of porous structure. The framework can be of any shape with big perforation holes.

Filtrating elements (e.g. one-metre long) put on the perforated framework enable a correct selection of the porous structure depending on filter layer granulation.

FILTRATSON CONDITIONS

So far drain pipes has had holes which have been very thinly distributed (small perforation coefficient) and their diameter had to be smaller than the grain of the filtered material. Recently Poltegor-lnstitute has worked out special filtration linings of porous structure characterized with high permeability due to a great number of smooth ducts. The framework can possess holes of bigger diameters (perforation factor of more than 10) it does not undergo quick silting-up and the applied filtration lining ensures high filtration efficiency.

Conducted laboratory and field examinations make it possible to claim that new generation of high efficiency drain pipes has the efficiency 10 times higher than the one of She drain pipes used so far.

HYDRAULIC PARAMETERS

As a result of the conducted examinations on the flow for different filtration linings of porous structures the following efficiencies has been determined: