Method for treating copper-containing and chromium-containing industrial wastewater by applying bacterium detoxification effect

A technology for industrial wastewater and detoxification, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. The effect of large-scale promotion and use, easy availability of raw materials, and feasible and convenient operation

Active Publication Date: 2021-01-22
佛山经纬纳科环境科技有限公司
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Problems solved by technology

Although the synergistic effect of Bacillus cereus and root exudates of Lishiwort can significantly improve the reduction effect on hexavalent chromium, it needs to add additional nitrogen, phosphorus, and potassium nutrients during the treatment process, and it does not explain the effect on trivalent chromium. Chromium (Cr(III)) fixation capacity (removal rate of total chromium) also has a corresponding increase

Method used

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  • Method for treating copper-containing and chromium-containing industrial wastewater by applying bacterium detoxification effect
  • Method for treating copper-containing and chromium-containing industrial wastewater by applying bacterium detoxification effect
  • Method for treating copper-containing and chromium-containing industrial wastewater by applying bacterium detoxification effect

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Embodiment 1

[0039] (1) The Bacillus cereus bacterial liquid was cultured with LB medium (sterilized at 121°C for 20 minutes before use) at 180 rpm and 37°C for 16 hours. Centrifuge the cultured bacterial liquid at 5000rpm, and the bacterial cells obtained in the precipitated phase are the active bacterial agents (use within 6 hours at room temperature, or store at 4°C if it exceeds 6 hours).

[0040] (2) Take 20mL of mixed wastewater from the electroplating plant. The types and concentrations of heavy metals before treatment are shown in Table 1. The pH is about 5.5. At room temperature, add 1kg / m 3 The active bacterial agent of step (1). The resulting mixture was continuously stirred at a rotational speed of 180 rpm for reaction treatment. The water body after the reaction treatment was centrifuged at 5000rpm to separate the bacterial cell sediment and the water body. The isolated bacteria can be recycled after calcination. The treated water body can be discharged after being treate...

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Abstract

The invention belongs to the technical field of ecological restoration, and discloses a method for treating copper-containing and chromium-containing industrial wastewater by applying a bacterium detoxification effect. The method comprises the following steps: carrying out amplification culture on bacillus cereus and then carrying out centrifugal separation to obtain an active microbial agent; andputting the obtained active microbial agent into industrial wastewater containing chromium and copper for reaction treatment. According to the method, bacillus cereus is used for treating the wastewater containing hexavalent chromium in a copper-containing environment, reduction of hexavalent chromium and immobilization of trivalent chromium can be remarkably promoted without adding extra nutrients, the removal rate of hexavalent chromium can reach 97.6%, and the removal rate of total chromium can reach 90.3%; and meanwhile, the method has a certain removing effect on other metal ions. According to the method, nutrients do not need to be additionally added, secondary pollution does not exist, the reaction process is carried out at the room temperature, operation is easy and convenient, and the cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and in particular relates to a method for treating industrial waste water containing copper and chromium by using bacterial detoxification. Background technique [0002] Chromium is an important inorganic chemical raw material, involving electroplating, metallurgy, tanning, aviation and other fields. Taking the electroplating industry as an example, the wastewater produced contains a large amount of heavy metal ions, mainly including chromium, nickel, copper, etc. Among them, hexavalent chromium is a carcinogen and mutagen, which seriously damages the ecological environment. [0003] For the problem of chromium in wastewater, it is mainly removed by chemical methods. Chromium removal by reduction method is to reduce hexavalent chromium to trivalent chromium with reducing substances such as sulfite and ferrous sulfate, and the reduction product combines with sulfate radical to form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/22C02F101/20
CPCC02F3/34C02F2101/22C02F2101/20C02F2101/203
Inventor 冯春全李政黄冰梅
Owner 佛山经纬纳科环境科技有限公司
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