China Mobile Communications Corporation

Beijing Guohuan Tsinghua Environment Engineering Design & Research Institute Co., Ltd.

Xuefeng Zhao

Yan Li

Cheng-Wen Wang

Hongxiang Fu

A method for processing fluoride-containing wastewaters from a factory, which includes the following steps: Step 1: collecting the fluoride-containing wastewaters into three pools: an acidic high-fluoride wastewater, an acidic low-fluoride wastewater, and an alkaline wastewater; Step 2: adding a calcium compound to the acidic low-fluoride wastewater to produce a calcium-containing solution; Step 3: reacting a portion of the calcium-containing solution with the acidic high-fluoride wastewater at a calcium-to-fluoride molar ratio of from about 0.5:1 to about 1.5:1 to produce a mixture comprising calcium fluoride particles suspended in a mother liquor; Step 4: separately collecting the calcium fluoride particles and the mother liquor; Step 5: diluting the mother liquor with a diluent to produce a mixed solution; and Step 6: introducing the mixed solution, the calcium-containing solution, and the alkaline wastewater into a fluidized bed reactor, which contains a calcium fluoride crystallization seed material, to form calcium fluoride crystals.

Process for recovery of fluoride from wastewater produced in crystalline silicon solar cell manufacturing

A terminal inter-application network resource allocation method comprises the following steps: a terminal determining, according to a set ratio, an allocation ratio of network bandwidth resources for network applications running at the foreground, and according to a statistical result, obtained by the terminal, of operational behavior performed by a user on each network application, determining an allocation ratio of unallocated network bandwidth resources for each network application; the terminal allocating network bandwidth resources to each network application according to the allocation ratio of the network bandwidth resources for each network application. According to the application, bandwidth allocation can be dynamically adjusted in real time according to user operations, so as to solve the problem that, when multiple applications are enabled, the data communication time of a current application increases because the network resources are occupied by other background applications.

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Beijing, China

Xuefeng Zhao