Micro-organism eliminating method for contaminated underground water

A groundwater and organic matter technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Small footprint, overcoming the effect of long processing cycles

Inactive Publication Date: 2004-03-31
QILU PETRO CHEM - SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Micro-organism eliminating method for contaminated underground water
  • Micro-organism eliminating method for contaminated underground water

Examples

Experimental program
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Example Embodiment

[0018] Example one

[0019] The biological oxidation tower is equipped with biological filler ceramsite and supporting gravel. The ceramsite is a lightweight porous aggregate made from natural shale as the raw material and expanded by high temperature roasting (around 1000℃). The shale ceramsite is hard and porous. It is light in weight and does not contain heavy metals and other harmful substances harmful to the human body. Its main chemical components are:

[0020] Name SiO 2 Al 2 O 3 Fe 2 O 3 CaO MgO loss on ignition

[0021] Content% 61~65 19~24 4~9 0.5~1 1~2 5.0

[0022] The bulk density of ceramsite is 720Kg / m 3 , The total porosity is 75.6%, of which the open porosity is 47.2%, and the specific surface area is 3.99m 2 / g The oxygen required by the biological oxidation tower is supplied by compressed air to keep its dissolved oxygen above 2mg / L. The effluent from the biochemical tower is then pumped into the activated carbon adsorption tower, and the effluent from ...

Example Embodiment

[0038] Example two

[0039] Biochemical tower inlet water petroleum organic matter content 15mg / L, biochemical tower inlet water 4m 3 / h, hydraulic retention time 40min,

[0040] Activated carbon tower water intake 4m 3 / h, the hydraulic retention time is 35min, most of the organic matter in the effluent of the activated carbon tower is not detected, and the petroleum organic matter content is 0.15mg / L. Irregular nutshell activated carbon is used in the activated carbon packing tower, and the rest is the same as in Example 1.

Example Embodiment

[0041] Example three

[0042] The content of petroleum organic matter in the inlet water of the biochemical tower is 3mg / L, and the inlet water amount of the biochemical tower is 4.5m 3 / h, hydraulic retention time 15min, activated carbon tower water inlet 4.5m 3 / h, the hydraulic retention time is 8min, most of the organic matter in the effluent of the activated carbon tower is not detected, and the petroleum organic matter content is 0.10mg / L. The rest is the same as the first embodiment.

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Abstract

The present invention relates to environment protecting technology. The micro-organism eliminating method for contaminated underground water includes the following steps: to prepare acclimated biological stuffing haydite layer, to pump underground water to surface, to adsorb through biological stuffing haydite tower, and to adsorb through active carbon tower. The said method can reduce petroleum organism content from 1-15 mg/L to 0.2 mg/L, reaching industrial water standard. The said method has the advantages similar to that of biological oxidation method and active carbon adsorption method and has smell covered area and short treatment period.

Description

Technical field [0001] The invention belongs to the category of environmental protection technology, and relates to a method for removing trace organic matter in contaminated groundwater. Background technique [0002] Contaminated groundwater cannot be eliminated by self-purification in a short period of time and must be treated manually. One is underground in-situ treatment, that is, adding chemicals or microorganisms to the groundwater. The possibility of success of this method depends on the physical properties of the underground rock formations and soil, the types of pollutants and the physical and chemical properties of the groundwater itself. This method has disadvantages such as difficulty in dosing medicine and nutrient distribution required for microbial growth, long purification period and difficult control of the effect. The other is to pump groundwater to the ground and treat it as needed. [0003] Common ground treatment methods include flocculation, chemical oxidati...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 路明义李茂双王业君张方银
Owner QILU PETRO CHEM - SINOPEC
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