88results about How to "Reduce the chance of secondary pollution" patented technology

The invention provides a horizontal type three-phase biological fluidized bed and a sewage treatment method thereof. According to the horizontal type three-phase biological fluidized bed, a water inlet and water distribution anaerobic zone, a high-load facultative biological treatment zone, a baffling zone, a low-load aerobic biological treatment zone and a settling pond are horizontally arranged from a water inlet end to a water outlet end, and moreover suspended biological stuffing layers are arranged inside other zones except the baffling zone. Sewage is fed into the water inlet and water distribution anaerobic zone, in an anaerobic environment, BOD organic maters in the wastewater are converted into a fermentation product by facultative fermentation bacteria, polymerized phosphate stored in the cells is decomposed by phosphorus-accumulating bacteria, and then the sewage is fed into the high-load facultative biological treatment zone to remove COD and nitrogen, is further fed into the low-load aerobic biological treatment zone to reduce phosphorus in the effluent, and is finally settled, clarified and filtered by the settling pond so as to obtain clean water. As all process steps are accomplished in one same horizontal pond, the land is saved, the phenomenon that equipment such as a pump and a valve is blocked when dispersed type stuffing is adopted to treat sewage is avoided, and a carrier is prevented from loss, piling or hardening.

The invention discloses a steam sterilizer, which comprises an evaporating pan assembly having a disinfection chamber, wherein a heating element is arranged at bottom of the disinfection chamber, an exhaust pipe is arranged on the upper part of the disinfection chamber, an exhaust control valve is arranged on the exhaust pipe; a pressure water case, wherein, the bottom of the pressure water case is connected to the bottom of the disinfection chamber through a feed pipe, a water volume control valve is arranged on the feed pipe; a bidirectional air pump connected to the pressure water case through a pressure regulating pipeline and communicated to the disinfection chamber through a hot air pipeline, wherein a pressure regulating valve is arranged on the pressure regulating pipeline, a hot air control valve is arranged on the hot air pipeline; a circuit board assembly connected to the bidirectional air pump, the heating element, the exhaust control valve, the water volume control valve, the pressure regulating control valve and the hot air control valve; and a casing arranged at external part of the above parts for supporting and protecting the above parts. The steam sterilizer has functions of cleaning, disinfection and drying which are carried out in the disinfection chamber, artificial transfer of the disinfection articles is not required, usage is more convenient and faster, disinfection processing efficiency is increased, and secondary pollution probability during a transfer process of the disinfection articles can be reduced. An ingenious design is employed, so that structure is simpler, more compact, smaller and more flexible, comprehensive utilization rate of the parts is high, and manufacture cost and use cost can be better controlled.

The invention relates to a kit of extracting a whole genome DNA (Deoxyribonucleic Acid) from blood and a using method thereof. The kit is characterized by comprising a red blood cell lysate, a white blood cell scrubbing solution, digestive juice, proteinase K, a purifying liquid, gDNA salting out liquid, a gDNA scrubbing solution, a gDNA eluant and the like. The using method of the whole genome DNA extraction kit for blood is characterized by comprising the following steps: washing the red blood cell split to obtain the white blood cell; splitting the white blood cell by the digestive juice containing the proteinase K; and further purifying by an improved lithium chloride purifying liquid, salting out the liquid layer, and carrying out chromatography to obtain the high purity whole genome DNA. When the kit provided by the invention is used to extract the whole genome DNA in blood, plasma and serum in blood are not separated in advance but fresh or frozen anti-freezing whole blood is taken, wherein the lowest blood volume required reaches 20 microliters or blood cakes are required. According t the kit provided by the invention, the whole genome DNA with high purity can be fully unlinked and the PCR (Polymerase Chain Reaction) amplification is efficiently carried out, so that the kit is used for scientific research or clinical diagnostic analysis such as PCR amplification, gene expression, gene sequencing, whole genome sequencing, exome sequencing, gene mutation and single nucleotide polymorphism.