High concentrations of vegetable and animal fats are available in waste waters coming from eating places and catering establishments connected with preparation of foodstuff and convenience food. Such wastes discharged into municipal sewage lines without pretreatment pose a threat of fat plugging of the mains. Plugs are unavoidable even if they have not occurred within a short period of time. If flows are cooled fats will settle on pipes step-by-step clogging completely the working diameter of pipes. Fat catchers (fat traps) provide for reduction in fat concentrations which allow discharging of wastes into the domestic sewage. For industrial water treatment spc promvodochistka ltd offers treatment plants пво-жлт with capacities of 5, 10 and 15m3/hour. For selection of a particular model one shall pay attention not only to a capacity but to a working temperature as well. Temperatures not exceeding 40oc ensure the most efficient fat removal. A periodical cleaning of equipment is a binding requirement set to its proper operation. This procedure shall be followed semi-annually or on a more frequent basis as fat sediments accumulate.
Operation concept of the fat catcher is based on fat separation phenomenon occurred if water flow direction changes. Light fractions come to the surface. Heavy fractions settle when passing through the thin-bed settling tank and creep down into settlement space. Skimming flotation complexes are removed with the help of an automatic scraper. Sediment generated is periodically drained by gravity or pumped. Treated water overflows into a tray and is discharged into the sewage.
Advantages of plants пво-жлт:
Fat catchers to treat industrial waste waters are installed on underground floors and in technical premises with unobstructed access available. They shall be tied in such a way as to be serviced by sewage trucks. For this purpose discharge pipes shall be available. Fat catchers shall be placed above-or underground depending on the enterprise specifics and the customer’s usability. Fat catchers are made of state-of-the-art high-strength materials, usually this material is propylene that is able to withstand loads and be exposed to aggressive environment for a long period of time. Fat catchers for industrial water treatment are equipped with covers providing tightness and preventing against unpleasant odors. The fat catcher for underground installation shall be placed in upright position, only a cover protrudes 15-20 cm above ground; this protrusion is intended for control. A foundation is made of concrete and back sides of the catcher are filled up with sand. Special attention shall be paid to cable and electric parts protection against water. A discharging pipe shall be placed slightly downward. If the catcher is installed under a traffic road, then a hatch is mounted instead of a cover. Operation of the industrial fat catcher is based on prolonged settling of wastes and their filtration. During settling large size wastes are precipitated, waste waters enter the chamber upon passing through a special filter; in the chamber large matters aggregate and are removed by mechanical devices as they accumulate in the upper part. A special timer is useful for automatic operation of the catcher.