Unattended, efficient and low-consumption rural domestic sewage treatment system

Aiming at the technical problems in the prior art, the utility model provides an unattended, efficient and low-consumption rural domestic sewage treatment system which comprises a pretreatment unit, a main reaction unit and an equipment cabin, the pretreatment unit comprises an oil separation tank and a pump tank which are communicated with each other, one end of the oil separation tank serves as a water inlet, and one end of the pump tank serves as a water outlet; the main reaction unit comprises a pre-sedimentation regulating tank, a first aerobic tank, a second aerobic tank, a mixed flocculation tank, a water distribution channel, a sedimentation tank, a water collection tank and a sludge storage tank which are arranged in sequence and communicated with one another, the pre-sedimentation regulating tank is communicated with the sludge storage tank, and a novel efficient active suspended biological carrier is added to form a sludge-membrane composite process. The solid-phase biological ...

Process for improving leaching rate of germanium in germanium-containing secondary zinc oxide

The invention relates to a process for improving the leaching rate of germanium in germanium-containing secondary zinc oxide, and belongs to the technical field of hydrometallurgy. The method comprises the following six main steps: (1) grinding and slurrying germanium-containing secondary zinc oxide smoke dust, (2) leaching germanium-containing secondary zinc oxide subjected to slurrying with a medium-low acid, (3) enriching germanium in leached clear liquid, (4) oxidizing germanium-poor liquid to precipitate iron, (5) returning part of precipitated iron underflow to the low-acid mixed leaching, and (6) carrying out high-acid leaching on low-acid leached residues. And enabling insoluble sulfides in the germanium-containing secondary zinc oxide to react with iron in the iron precipitation underflow to enter the solution. Aiming at the problem of low leaching rate of the traditional two-stage countercurrent leaching process flow, the germanium leaching rate is effectively improved by adjusting ...

Network measuring system structure and realizing method thereof

Uniform material distributing and discharging device capable of preventing materials from being blocked

The utility model belongs to the technical field of mechatronics material conveying devices. The uniform material distributing and discharging device comprises a material distributing body, a feedingport is formed in the material distributing body, the bottom end of the material distributing body is fixed to a material carrying disc, a discharging baffle is arranged on the material distributing body to form a fixed plough type structure, and a material distributing port is formed in the material distributing body in the radial direction of the material carrying disc. A material bearing structure is arranged in the center of the material carrying disc, the discharging baffle is attached to the material bearing structure and the disc face of the material carrying disc, and a turning and scraping structure is formed in the rotating process of the material carrying disc. According to the device, materials are effectively turned and scraped in the rotating process of the loading disc, theresistance ...