84results about How to "Keep water clean" patented technology

The invention discloses a modular type ultraviolet sterilization device of the circulating water of a fishpond, which consists of an electric control system, a ballast, a bracket, a luminous tube and a pneumatic back wash pipe; the bracket is in square frame structure, the two ends of which are square flat panels, a frame formed by PVC pipes is arranged between the two panels; eight rows (four luminous tube per row) of luminous tubes and seven rows (four pneumatic back wash tubes per row) of pneumatic back wash tubes are evenly distributed on the panels at the two ends respectively; a discharging pipe is arranged in an end face of the bracket, a sewage suction port and a sewage discharging port are arranged at the two ends; the electric control system is outside another panel that is fixed at the other end of the bracket and is connected with the luminous tube by a ballast; the pneumatic back wash pipeline is fixed outside another panel that is fixed at the other end of the bracket and is connected with each exhaust back wash tube; the invention is simple in design and structure, low in cost, the sterilizing effect is as high as 99 percent, which reduces production investment and is convenient for management and maintenance; the device is suitable for the plant-type industrial culturing of the circulating water of a fishpond, and can purge various bacteria in the circulating water to keep the clean water quality of the circulating water and lead the circulating water to be reused.

Disclosed is a process for producing fat powder by using oil deposit which comprises, charging alkaline calcium 15-20 wt% of dried oil residue base into the oil residue, heating to 100-120 deg. C, cooling down, drying, and disintegrating. The prepared fatty powder has high fat content, which can be used as feed addictive or fish or shrimp bait.