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A biochemical treatment method for enhanced removal of heavy metals in sewage by composite carrier

A composite carrier and biochemical treatment technology, which is applied in the field of sewage treatment, can solve the problems that the discharge water is difficult to meet the national discharge standard, the natural flocculation and sedimentation takes a long time, and the types of heavy metal ions are complex, so as to shorten the cultivation time, fast the sedimentation rate, improve the The effect of settling properties

Active Publication Date: 2021-06-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high acidity of heavy metal wastewater, the complex types of heavy metal ions, and the existence of various valence states and forms, the treatment is extremely difficult. There are many problems in the treatment of heavy metal wastewater by using the existing AAO process, such as natural flocculation and sedimentation. long, the discharge water is difficult to meet the national discharge standards, etc.

Method used

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  • A biochemical treatment method for enhanced removal of heavy metals in sewage by composite carrier
  • A biochemical treatment method for enhanced removal of heavy metals in sewage by composite carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0026] like figure 1 Shown, a kind of composite carrier strengthens the biochemical treatment method that removes heavy metal in sewage, comprises the following steps:

[0027] (1) Mix diatomite and tourmaline at a mass ratio of 9:1, grind and sieve the obtained mixture to obtain a composite carrier powder with a particle size of 10-200 μm, then soak the composite carrier in raw sewage water, stir, and wait After the composite carrier completely absorbs moisture (no longer agglomerating and floating), the composite carrier slurry is obtained;

[0028] (2) Use a pH regulator to adjust the composite carrier slurry to 7 to 8, and then spray the composite carrier slurry into the anaerobic tank in the AAO biological treatment device through a directional spray device; wherein, the composite carrier is in the anaerobic tank The ratio of the daily dosing quality in the medium to the total effective volume of the AAO biological treatment device is 2g: 1L;

[0029] (3) Start the AAO ...

Embodiment 2

[0036] A biochemical treatment method for strengthening the removal of heavy metals in sewage with a composite carrier, comprising the following steps:

[0037] (1) Mix diatomite and tourmaline at a mass ratio of 9:1, grind and sieve the obtained mixture to obtain a composite carrier powder with a particle size of 10-200 μm, then soak the composite carrier in raw sewage water, stir, and wait Composite carrier slurry is obtained after the composite carrier completely absorbs moisture;

[0038] (2) Use a pH regulator to adjust the composite carrier slurry to 7-8, then mix the composite carrier slurry with activated sludge to obtain a mixed solution, and then spray the mixed solution to the AAO biological treatment device through a directional spray device In the anaerobic tank; wherein, the ratio of the daily dosage of the composite carrier in the anaerobic tank to the total effective volume of the AAO biological treatment device is 3g: 1L;

[0039](3) Start the AAO biological ...

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Abstract

The invention discloses a biochemical treatment method for strengthening the removal of heavy metals in sewage by a composite carrier, belonging to the technical field of sewage treatment. The method includes the following steps: first, mixing diatomite and tourmaline to obtain a composite carrier, then soaking the composite carrier in raw sewage water, stirring, and obtaining a composite carrier slurry after the composite carrier completely absorbs moisture; then, using a pH regulator Adjust the composite carrier slurry to 7-8, then add the composite carrier slurry to the anaerobic tank in the AAO biological treatment device; finally, start the AAO biological treatment device, the sewage to be treated flows into the anaerobic tank, and the composite carrier Together with the sewage, it enters the subsequent AAO treatment unit. The AAO process runs for a period of time to culture the composite carrier for microorganisms. After the microbial cultivation of the composite carrier is completed, the AAO biological treatment device enters the normal and stable operation stage. This method can strengthen the removal of heavy metals in sewage and improve the removal rate of COD and TN in sewage.

Description

technical field [0001] The invention relates to a biochemical treatment method for strengthening the removal of heavy metals in sewage by a composite carrier, and belongs to the technical field of sewage treatment. Background technique [0002] With the rapid development of modern industry, the discharge of industrial wastewater has also increased sharply, the accumulation of heavy metals in water has intensified, and heavy metal pollution has become serious. On the other hand, enterprises that produce non-ferrous metals have wastewater discharges in the entire production process from mining, beneficiation, smelting to product processing, which contain heavy metal elements such as antimony, copper, lead, zinc, arsenic, chromium, electroplating, pigments, etc. , electronics, instrumentation and other industries will also cause serious heavy metal pollution. Heavy metal ions in heavy metal wastewater circulate through groundwater and migrate through soil, causing pollution to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/30
Inventor 柴晓利戴晓虎陆斌武博然汪秀仲
Owner TONGJI UNIV
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