2results about How to "Control pH" patented technology

This utility model relates to a gradient acidification precipitation separation device for rhamnolipids. The acid precipitation tower includes multiple acid precipitation tanks and a top cover. The top of each acid precipitation tank is open, and the bottom of the tank is closed and equipped with a feed outlet pipe. An electrically controlled valve is installed on the feed outlet pipe. An adjustment inlet pipe, an electric heater, and a pH meter are provided on the side wall of each acid precipitation tank. The multiple acid precipitation tanks are arranged and fixedly connected from top to bottom. The top cover is fixed to the top opening of the uppermost acid precipitation tank and has a mother liquor inlet pipe. The feed outlet pipe of the lowermost acid precipitation tank is connected to a delivery pump, and the output end of the delivery pump is connected to the feed pipe of a hydrocyclone separator. This utility model allows for multi-gradient acidification precipitation from top to bottom using multiple acid precipitation tanks, making it easier for personnel to control the pH value of the acidification, enabling the rhamnolipids to precipitate in stages, improving the stability of the acid precipitation operation. The entire process can achieve multi-gradient acid precipitation separation in a single operation, greatly improving the efficiency of acid precipitation separation.

This invention provides a method and apparatus for alkaline sterilization of fermentation sample liquid, applied to sterilization equipment. The sterilization equipment includes: a sterilization tank, a pH measuring device, a stirring device, and an alkaline input device. The stirring device and the pH measuring device are assembled in the sterilization tank. The method includes: controlling the alkaline input device to input alkaline solution into the sterilization tank in batches; controlling the stirring device to stir the liquid in the sterilization tank and measuring the pH of the liquid in the sterilization tank using the pH measuring device; when the pH measured by the pH measuring device exceeds a first preset threshold for a third preset time, controlling the alkaline input device to stop inputting alkaline solution, controlling the stirring device to stop stirring, and discharging the liquid from the sterilization tank.