Device and method for treating sulfate wastewater

A waste water treatment, sulfate technology, applied in biological water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve solid waste calcium sulfate difficult to dispose of, secondary pollution, sulfur Incomplete handling of issues such as

Inactive Publication Date: 2012-02-15
FUDAN UNIV
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Problems solved by technology

However, the huge amount of solid waste calcium sulfate produced by the neutralization method is difficult to dispose of, causing serious secondary pollution
The treatment of acid mine wastewater by wetland method has the advantages of less investment, low operating cost, and easy management; however, the wetland method cover

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  • Device and method for treating sulfate wastewater
  • Device and method for treating sulfate wastewater

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawings and practical examples.

[0024] The present invention is a sulfate wastewater treatment device, such as figure 1 As shown, it mainly includes two parts: anaerobic expanded bed reactor and combined precipitator. The anaerobic expanded bed reactor can be made of plexiglass or PVC pipe, with a total height of 1400 mm, a diameter of 150 mm, and an effective volume of 20 L. The sulfate wastewater enters the bottom of the bed through the pump, and passes through in an upward flow mode. The water pump used is a common booster pump or a peristaltic pump. There are 4 sampling ports on the side of the expanded bed with a distance of 20 cm. The outlet water of the expanded bed enters the central sedimentation chamber through the connecting water pipe. The height of the central downflow chamber is 310 mm, the diameter is 100 mm, the effective volume is 2.1 L, the upper and lower sides...

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Abstract

The invention belongs to the technical field of wastewater treatment, in particular to a method and a device for treating sulfate wastewater. The treatment method comprises the following steps of: performing first-stage anaerobic treatment, namely adding ethanol into wastewater to be treated, and performing first-stage anaerobic treatment by using an anaerobic expanded bed, wherein a sulfate reduction reaction and methane fermentation are basically finished in a first-stage anaerobic reactor; and performing second-stage anaerobic treatment, namely finishing sulfate blow-off, anaerobic sludge precipitation and further second-stage anaerobic treatment in a combined precipitator. The sulfate reduction amount is extremely low in the second-stage anaerobic treatment process, but 30 to 70 percent of organic matters can be removed; and chemical oxygen demand (COD) removal efficiency rises along with the reduction in first-stage anaerobic amount so as to ensure that the whole set of system has a higher level of organic matter removal efficiency. The treatment device comprises an anaerobic expanded bed reactor, the combined precipitator, a water inlet pump, a backflow pump and the like. The device and the method have good treatment effects on high-concentration sulfate wastewater; and by the device and the method, the organic matter removal efficiency and methane fermentation efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment device and method for sulfate waste water. Background technique [0002] In recent years, the pollution of sulfate wastewater has become increasingly serious, and a large number of industrial wastewater containing high concentrations of sulfate have emerged in many production areas, such as chemical, pharmaceutical, leather, paper, fermentation, food processing and mining, etc., and sulfate wastewater It has the characteristics of large polluted area, long incubation period and difficult treatment. Among the well-known water pollution problems in the Huaihe River Basin, sulfate-rich monosodium glutamate wastewater is the second largest source of pollution. In addition, the groundwater in many cities in my country has been polluted by sulfates to varying degrees. Therefore, seeking an effective sulfate wastewater treatment process has become...

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Application Information

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IPC IPC(8): C02F9/14C02F3/28C02F3/34
CPCY02E50/30
Inventor 郑正赵永军丁举静李纪华何坚罗兴章
Owner FUDAN UNIV
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