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Methane substrate biomembrane reactor and process for removing perchlorate from drinking water

A biofilm reactor, perchlorate technology, applied in waste fuel, anaerobic digestion treatment and other directions, can solve the problems of low methane gas solubility, small mass transfer coefficient, slow growth, etc., to improve methane utilization rate, microorganisms The effect of less loss and less clogging

Inactive Publication Date: 2016-01-27
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Since methane-oxidizing bacteria are autotrophic microorganisms, they grow slowly; on the other hand, methane gas has low solubility in water and a small mass transfer coefficient. Commonly used bioreactors, such as sequencing batch reactor (SBR) and continuous stirred tank reactor (CSTR) and biofilm reactor (MBR), etc., the application of anaerobic methane oxidation coupled perchlorate reduction technology is limited

Method used

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  • Methane substrate biomembrane reactor and process for removing perchlorate from drinking water
  • Methane substrate biomembrane reactor and process for removing perchlorate from drinking water
  • Methane substrate biomembrane reactor and process for removing perchlorate from drinking water

Examples

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Embodiment 1

[0042] Treatment Example 1: Control the hydraulic retention time of the methane matrix biofilm reactor to 40 h, and control the internal circulation water flow rate to 100 mL / min. When the influent perchlorate concentration is 5mg / L and the methane gas pressure is 0.04Mpa, the effluent perchlorate concentration is around 0.07mg / L, and the perchlorate removal rate reaches over 98%. like image 3 Shown is the low-concentration perchlorate influent and effluent concentrations in the reactor of the present invention.

Embodiment 2

[0043] Treatment Example 2: Control the hydraulic retention time of the methane matrix biofilm reactor to 40 h, and control the internal circulation water flow rate to 100 mL / min. When the influent perchlorate concentration is 10mg / L and the methane gas pressure is 0.04Mpa, the effluent perchlorate concentration is around 0.20mg / L, and the perchlorate removal rate reaches over 98%. like Figure 4 Shown is a schematic diagram of the concentration of high-concentration perchlorate influent and effluent in the reactor of the present invention.

[0044] As can be seen from the above examples, the methane matrix biofilm reactor provided by the present invention and the removal process of perchlorate in drinking water use the hollow fiber degassing membrane as the carrier for the growth of microorganisms in the system of anaerobic methane oxidation coupled with perchlorate reduction And the supply path of methane gas, methane gas passes through the hollow fiber membrane pores to th...

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Abstract

The invention provides a methane substrate biomembrane reactor and a process for removing perchlorate from drinking water. The reactor comprises a casing and a hollow fiber membrane assembly, wherein the top end of the casing is provided with a flange cover; the casing is outwards provided with a gas inlet; methane is introduced through the gas inlet; the casing is inwards provided with a fixedly connected membrane assembly fixing element; the hollow fiber membrane assembly is arranged inside the casing and consists of a hollow fiber membrane tow and a membrane assembly sealing head; the hollow fiber membrane tow is in a shape that a U-shaped opening is upward, and an end opening is fixedly connected onto the membrane assembly sealing head through epoxy resin adhesives; the sealing head of the hollow fiber membrane assembly is connected and fastened with a membrane assembly element arranged at the inner end of the flange cover arranged at the top end through screw threads, and is communicated with the gas inlet. The methane substrate biomembrane reactor is used; the operation is performed according to a continuous flow mode; the methane is used as an electric supply and a carbon source; the methane utilization rate can be effectively improved; the enriching domestication of reducing system microbes for oxidatively coupling anaerobic methane with high-perchlorate is shortened; the fast, efficient and safe removal of perchlorate in the drinking water is realized.

Description

technical field [0001] The invention belongs to the application field of water treatment technology, and in particular relates to a methane matrix biofilm reactor and a process for removing perchlorate. Background technique [0002] perchlorate It has been widely used in many fields such as rocket and missile propellants, fireworks and firecrackers manufacturing, munitions industry, automobile airbags, lubricants, electroplating solutions, leather tanning agents, rubber product dye coatings, highway safety flash boards, etc., in the process of agricultural fertilization Perchlorate is also present. Excessively high concentrations of perchlorate have the effect of inhibiting the thyroid gland from absorbing iodine, weakening the active function of the thyroid gland, causing thyroid dysfunction, affecting the normal metabolism of the human body, and affecting the normal growth and brain development of infants and young children. Perchlorate has the characteristics of being ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCY02E50/30
Inventor 谢婷李小明杨麒安鸿雪钟宇赵建伟
Owner HUNAN UNIV
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