Technology for degrading perchlorate in water and used degradable composite material

A technology of composite materials and parameters, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of inability to achieve effective removal, inconsistent removal rate, low removal rate, etc., to achieve The effect of overcoming the decline in the metabolic function of perchlorate-reducing bacteria, easy automatic control, and moderate degradation rate

Inactive Publication Date: 2014-04-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Even if the two are used at the same time, since PHB and PCL exist independently and will not interact with each other to affect structural changes, their respective degradation rates will not change; The removal rate is inconsistent before and after, and the removal rate in the later stage is too low, so that the treated water cannot meet the standard, and the goal of effectively removing perchlorate cannot be achieved in one treatment process

Method used

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  • Technology for degrading perchlorate in water and used degradable composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A kind of technology that biodegradable material is used as carbon source to remove perchlorate in water, concrete steps are as follows:

[0058] In this example, the sludge domesticated by perchlorate from Jinan No. An appropriate amount of sodium perchlorate (concentration 2mg / L) was added to the groundwater in the southern mountainous area of ​​the city as influent water, and the influent flow rate was 50mL / h into the column reactor. The column reactor height was 40cm, the particle filling height was 30cm, and the inner diameter was 3cm. When the perchlorate groundwater flows through the reactor, it can fully contact the biofilm on the composite particles, and degrade perchlorate with the small molecule organic matter released by the microbial degradation carrier particles as the carbon source, and collect the treated water after 4 hours.

[0059] The preparation methods of the degradable composite material particles are respectively as follows:

[0060] Weigh 50g o...

Embodiment 2

[0067] A kind of technology that biodegradable material is used as carbon source to remove perchlorate in water, concrete steps are as follows:

[0068] In this example, the sludge domesticated by perchlorate from Jinan No. An appropriate amount of sodium perchlorate (concentration 4mg / L) was added to the groundwater in the southern mountainous area of ​​the city as influent water, and the influent flow rate was 80mL / h into the column reactor. The column reactor height was 60cm, the particle filling height was 40cm, and the inner diameter was 3cm. When the perchlorate groundwater flows through the reactor, it can fully contact the biofilm on the composite particles, and use the small molecular organic matter released by the microbial degradation carrier particles as the carbon source to degrade perchlorate, and collect the treated water after 6 hours.

[0069] The preparation method of the degradable composite material particles is as follows:

[0070] Weigh 30g of PHB and 60...

Embodiment 3

[0073] A kind of technology that biodegradable material is used as carbon source to remove perchlorate in water, concrete steps are as follows:

[0074] In this example, the sludge domesticated by perchlorate from Jinan No. An appropriate amount of sodium perchlorate (concentration 4mg / L) was added to the groundwater in the southern mountainous area of ​​the city as influent water, and the influent flow rate was 80mL / h into the column reactor. The column reactor height was 60cm, the particle filling height was 40cm, and the inner diameter was 3cm. The perchlorate groundwater flows through the reactor, which can fully contact the biofilm on the composite particles, and use the small molecular organic matter released by the microbial degradation carrier particles as the carbon source to degrade perchlorate, and collect the treated water after 4 hours.

[0075] The preparation method of the degradable composite material particles is as follows:

[0076] Weigh 50g of PHB and 30g ...

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Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to a technology for degrading perchlorate in water by employing a biodegradable material as a carbon source and a used degradable composite material. The biodegradable composite material is prepared from 10-80 parts of polyhydroxybutyrate (PHB) and 10-70 parts of PLC by cross-linking reaction. By adopting the degradable composite material disclosed by the invention, a micro-pore or filiform texture is correspondingly generated on the particle surface along with decomposition of degradable PHB. Thus, follow-up adhesion and growth of microorganisms and development into a biological membrane on the carrier surface are facilitated, slow release of the carbon source is achieved, the problems of reduction of a metabolic function of perchlorate reducing bacteria and reduction of the pollutant removal effect caused by deficiency of the carbon source can be overcome; and the degradation rate is moderate, and the degradable composite material can provide enough carbon source for metabolism of the perchlorate reducing bacteria and also can ensure a long replacement period of the carbon source. Therefore, the average removal rate and handling capacity can be effectively improved, and the treatment time is shortened.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a process for degrading perchlorate in water by using a biodegradable material as a carbon source and the degradable composite material used. Background technique [0002] Perchlorate (ClO 4 - ) has been widely used in rocket propellants, pyrotechnics manufacturing, arms industry, automotive airbags, highway safety flash boards and other fields. Perchlorate will compete with iodide to bind to the thyroid gland, resulting in insufficient secretion of thyroid hormone, which will eventually affect the development of the human body, especially the development of brain tissue. In addition, perchlorate may also cause toxic effects on target organs other than the thyroid gland. It migrates and stays in human tissues, and can even be passed to the next generation through the umbilical cord. It is a typical endocrine disrupting substance. [0003] Perchlora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08J3/24C02F3/34
Inventor 何芳黄海东王子豪王仲鹏周海红王秀菊王立国
Owner UNIV OF JINAN
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