Abstract: Disclosed are a water quality analyzer and a method for analyzing water quality. The water quality analyzer includes a first disc system, a second disc system, a colorimetric system, a cleaning system, a mechanical sampling system, an analysis system and a central control display. The first disc system and the second disc system are axially rotatable. A plurality of sample locating positions and a chemical locating positions are provided on the first disc system along a circumference of the first disc system. A plurality of colorimetric cuvette locating positions are provided on the second disc system, and the colorimetric system is arranged at a circumference edge of the second disc system. The cleaning system and the mechanical sampling system are provided between the first disc system and the second disc system. The method includes water sampling, water sample injection, cleaning, reagent extraction, reagent injection, cleaning and colorimetric analysis.

Abstract: A device and a method of analyzing total cyanide in water samples, including a mixing tube, a stripping tube, a sampling pipe, a reaction pipe, a peristaltic pump, an air pump, a UV digester, a heater, a condenser, a drain pipe and a water sample detector. The mixing tube, the stripping tube, the sampling pipe and the reaction pipe are respectively connected to the peristaltic pump. The mixing tube is connected to the reaction pipe. A bottom of the stripping tube, the air pump, the UV digester, the heater and the condenser and are sequentially connected. The condenser is connected to the mixing tube. An upper portion of the stripping tube, the sampling pipe and the reaction pipe are connected to the drain pipe. An absorbance of the water in the mixing tube is measured by the sample detector, and used to calculate the total cyanide content by spectrophotometry.

Abstract: A device and a method of analyzing total cyanide in water samples, including a mixing tube, a stripping tube, a sampling pipe, a reaction pipe, a peristaltic pump, an air pump, a UV digester, a heater, a condenser, a drain pipe and a water sample detector. The mixing tube, the stripping tube, the sampling pipe and the reaction pipe are respectively connected to the peristaltic pump. The mixing tube is connected to the reaction pipe. A bottom of the stripping tube, the air pump, the UV digester, the heater and the condenser and are sequentially connected. The condenser is connected to the mixing tube. An upper portion of the stripping tube, the sampling pipe and the reaction pipe are connected to the drain pipe. An absorbance of the water in the mixing tube is measured by the sample detector, and used to calculate the total cyanide content by spectrophotometry.

Abstract: Disclosed are a water quality analyzer and a method for analyzing water quality. The water quality analyzer includes a first disc system, a second disc system, a colorimetric system, a cleaning system, a mechanical sampling system, an analysis system and a central control display. The first disc system and the second disc system are axially rotatable. A plurality of sample locating positions and a chemical locating positions are provided on the first disc system along a circumference of the first disc system. A plurality of colorimetric cuvette locating positions are provided on the second disc system, and the colorimetric system is arranged at a circumference edge of the second disc system. The cleaning system and the mechanical sampling system are provided between the first disc system and the second disc system. The method includes water sampling, water sample injection, cleaning, reagent extraction, reagent injection, cleaning and colorimetric analysis.

Abstract: Cyanobacterial host cells are modified to produce useful chemicals such as 1,3-propanediol and glycerol.

Abstract: Cyanobacterial host cells are modified to produce 1,2-propanediol.