Weissella based high cadmium wastewater treatment method

A Weissella and wastewater treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of poor treatment effect and long treatment period of high cadmium wastewater, To achieve the effect of saving biological cost, improving removal rate and strong pertinence

Pending Publication Date: 2019-08-06
XUZHOU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Some existing cadmium-containing wastewater treatment methods have problems

Method used

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  • Weissella based high cadmium wastewater treatment method
  • Weissella based high cadmium wastewater treatment method
  • Weissella based high cadmium wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A Weissella-based high-cadmium wastewater treatment method uses Weissella ZY-6 to reduce cadmium concentration in industrial wastewater, such as figure 1 As shown, the relevant steps are: 1. lead the industrial wastewater to a sedimentation tank for precipitation; 2. the primary wastewater after the precipitation is transported to a filter tank equipped with a biological filler (a cadmium-enriched plant in hydroponics), and the biological Weissella ZY-6 grows in the filler; 3. The primary sedimentation sludge at the bottom of the sedimentation tank is transported to the sludge treatment tank through a sludge pump and a sludge pipeline, and the primary sedimentation sludge is subjected to biological leaching, and the biological leaching bacterial solution is Contains Weisseria ZY-6.

[0016] In order to improve the cadmium adsorption rate of Weissella ZY-6 to the high-cadmium wastewater to be treated, the Weissella ZY-6 grown in the biological filler was domesticated fro...

Embodiment 2

[0021] The difference from Example 1 is that the temperature of the filter tank is controlled at 37°C, and the results of wastewater treatment are shown in Table 1.

Embodiment 3

[0023] Table 1 shows the results of using the wastewater treatment method of Example 2 to treat wastewater with a cadmium content of 156 mg / L high in cadmium.

[0024]

[0025]

[0026] Table 1

[0027] It can be seen from Table 1 that the cadmium adsorption rate in the primary wastewater is slightly higher at the filter temperature of 37°C, and 37°C is a balance point for the growth and adsorption rate of Weisseria ZY-6.

[0028] The present invention provides a high-cadmium wastewater treatment method based on Weisseria, but the high-cadmium wastewater treatment method is not limited to the treatment by Weisseria ZY-6, and can also be combined with other treatment methods. Provided is a method for rapidly adsorbing cadmium, which rapidly reduces the concentration of cadmium in wastewater, and is combined with a conventional cadmium adsorption method, so that the discharge of wastewater reaches the national standard. For the treatment of primary wastewater, the adsorpt...

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Abstract

The invention discloses a Weissella based high cadmium wastewater treatment method. The cadmium concentration in industrial wastewater can be reduced by using Weissella ZY-6. Industrial wastewater isintroduced into a sedimentation basin to perform precipitation, precipitated primary wastewater is conveyed to a filter tank provided with a biological filling material through a pipeline, and the Weissella ZY-6 grows in the biological filling material; and the initial sedimentation silt at the bottom of the sedimentation basin is conveyed to a silt treatment pool through a silt pump and a silt pipeline, bioleaching is performed on the initial sedimentation silt, and bioleaching bacteria liquid contains the Weissella ZY-6. The Weissella ZY-6 is used to perform treatment on high cadmium wastewater, the solid cadmium tolerance concentration of strains can reach up to 9,000 mg/L, and the liquid cadmium tolerance concentration of the strains can reach up to 900 mg/L, so that the strains are far superior to existing cadmium-tolerant strains; and solid-liquid separation and removal of cadmium can be performed on the wastewater, so that the method is strong in pertinency, and therefore, the removing rate of cadmium can be greatly enhanced, and biological costs can be saved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating high-cadmium wastewater based on Weissella. Background technique [0002] In recent years, heavy metal pollution in my country has been serious, especially cadmium pollution incidents have occurred frequently. The sources of cadmium-containing wastewater include mining, smelting, medicine, ceramics, inorganic pigment manufacturing, electroplating, and textile pollution in metal mines. Cadmium in various chemical forms will remain, accumulate and migrate after entering the environment or ecosystem, causing harm to the ecological environment. For example, even if the concentration of cadmium discharged with wastewater is very small, it can accumulate in algae and sediment, and be adsorbed by the body surface of fish and shellfish, resulting in food chain concentration, thus forming a public nuisance. The bone pain disease discovered in Japan in ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F101/20
CPCC02F3/34C02F2101/20
Inventor 王陶李文陈银元董玉玮陈宇凌
Owner XUZHOU UNIV OF TECH
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