Method for treating a contaminated fluid, system for treating a contaminated fluid, and method for making a biomass carrier suitable for treating a contaminated fluid

A system for treating a contaminated fluid, comprising:

• a tank for receiving the contaminated fluid;
• and
• biomass-carrier pieces disposed in said tank for contacting the contaminated fluid,
• wherein each of said biomass-carrier pieces is independently made from a fiber component selected from the group consisting of a non-woven fabric, a fiber bundle assembly, a bulky fiber bundle assembly, a woven fabric and a braided strap.

A method for making a biomass carrier suitable for treating a contaminated fluid, comprising:

• preparing a fiber bale consisted essentially of fibers;
• opening and scutching the fiber bale;
• carding the opened and scutched fiber bale so as to form a loosened fiber web;
• lapping a plurality of the loosened fiber webs to a predetermined thickness;
• consolidating the fibers of the loosened fiber webs so as to form the loosened fiber webs into a non-woven fabric;
• and
• structurally reinforcing the non-woven fabric by bonding the fibers of the non-woven fabric along at least one bonding line such that the thickness of the non-woven fabric is smallest at the bonding line.