Removal method of trace gasolene ingredient BTEX in ground water with high-efficiency and low consumption

Abstract

The invention discloses a method for removing trace gasoline component BTEX in groundwater with high efficiency and low energy consumption. Sludge supernatant goes through activated carbon bed layer from bottom to top through a sampling pump, flows back a sludge supernatant storage tank after flowing out from the upper end of an activated carbon column and so the cyclic inoculation goes; inlet water is switched into BTEX polluted water to carry out acclimation reproduction on bacteria inoculated on the activated carbon so as to form a biofilm; the inlet water enters the activated carbon column through the sampling pump by an updraft mode, and after operation the biofilm becomes mature through natural acclimation at the BTEX activated carbon column; after the biological activated carbon bed layer is slightly dredged, part microorganism in the bed layer goes up to the upper part of the bed layer with the rise of the water flow, trace microorganism concentrated bacteria liquid is removedby a pipette and is taken as a bacteria source after being diluted; and the bacteria source is used for inoculation of new carbon columns by the previous cyclic inoculation method, thus obtaining newBTEX biological activated carbon technique. The method has the advantages of high capacity load, small requirement amount on dissolved oxygen, simple and convenient flow, simple technique equipment and easy operation and management.

Description

A method for removing trace gasoline component BTEX in groundwater with high efficiency and low consumption 【Technical field】 The invention relates to the technical field of water treatment, in particular to a method for removing trace gasoline component BTEX in groundwater with high efficiency and low consumption. 【Background technique】 The basic components of petroleum are hydrocarbons such as hydrocarbons and aromatic hydrocarbons. Among them, the substances recognized as toxic and carcinogenic are mainly BTEX (benzene, benzene; toluene, toluene; ethylbenzene, ethylbenzene; xylene, xylene). With the widespread use of gasoline and other petroleum products and the leakage of oil tanks, other means of transportation, and underground oil storage tanks during downhole operations and oil and gas gathering and transportation during oil extraction, BTEX has become the most common groundwater pollutant. For this reason, the U.S. Environmental Protection Agency listed BTEX as a ...

AI Technical Summary

Problems solved by technology

Although air stripping can effectively remove BTEX from the liquid phase, it produces waste gas containing BTEX, which requires further air treatment devices, and is prone to secondary pollution; while activated sludge tanks generally occupy a large area , also need process operations such as aeration and oxygenation, which increases the cost of process operation

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