The invention relates to the purification of untreated water which is polluted with dissolved organic carbon compounds which can be biologically or adsorptively removed in a three-step process, whereby the upstream purification step is predominantly biological, i. Such methods may be used for animating still images, automating and streamlining application such as the creation of slide shows and screen savers of images containing faces. When the layer is allowed to relax, the elongated elements assume sinuous configurations. The space inside of the chamber is shaped to determine the bend radius for the enclosed optical cable and protects the cable during storage and handling.