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Biochemical treatment process for ethylene waste lye

A technology for ethylene waste lye and biochemical treatment, applied in chemical instruments and methods, natural water treatment, water/sewage multi-stage treatment, etc., can solve problems such as instability, poor effluent quality, impact damage, etc. The effect of strong impact, low treatment cost and stable effluent quality

Inactive Publication Date: 2013-10-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional biochemical treatment methods include activated sludge method, biological contact oxidation method, etc., but these single biochemical treatment technologies cannot obtain better treatment results, the effluent quality is not good, and it is often subject to large impact damage, so it is very unstable

Method used

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  • Biochemical treatment process for ethylene waste lye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the preparation of bacterial classification

[0021] The bacterial strain Thiomonas intermedia BCRC17547 involved in the present invention was purchased from the Biological Resource Preservation and Research Center of the Institute of Food Industry Development, Taiwan Province of China. After purchasing, operate according to the product instructions provided by the supplier. The liquid medium components used are: yeast powder 5g / L, disodium hydrogen phosphate 4.5g / L, potassium dihydrogen phosphate 1.5g / L, magnesium sulfate heptahydrate 0.1g / L, ammonium chloride 0.3g / L, sodium thiosulfate pentahydrate 5g / L. Adjust the pH of the medium to 6.0. Operate according to conventional microbiological methods, culture on a shaker at 30°C after inoculation, and harvest strains within 48 hours.

[0022] The strain Pseudomonas sp.XQ3m-2 involved in the present invention was obtained by screening, separating and purifying from nature by the inventor, and was preserved ...

Embodiment 2

[0024] Embodiment 2: the preparation of flora in the activated sludge reaction system and the film-hanging of biological aerated filter

[0025] The mature culture liquid of Thiomonas intermedia BCRC17547 harvested in Example 1 is mixed with municipal activated sludge in a volume ratio of 1:4 to obtain the aeration reaction tank (1# reaction tank) used in the first activated sludge system. flora.

[0026] The Pseudomonas sp.XQ3m-2CCTCC M2010162 mature culture bacterium liquid obtained by harvesting in Example 1 is mixed with municipal activated sludge in a volume ratio of 1: 4 to obtain aeration reaction tank (2# reaction) for the second activated sludge system Bacteria in the pond).

[0027] The mature culture of Pseudomonas sp.XQ3e CCTCC M209182 harvested in Example 1 was mixed with municipal activated sludge at a volume ratio of 1:4 to obtain the flora used in the biological aerated filter (3# reaction tank), Then hang the film according to the usual method. The typical ...

Embodiment 3

[0028] Embodiment 3: process ethylene waste lye

[0029] Mix the ethylene waste lye after wet oxidation treatment with local domestic sewage at a volume ratio of 1:6, stir evenly, and adjust the pH to 6.5. Influent COD measured Cr It is 1520mg / L. The mixed sewage is pumped into the reaction system of the present invention with a peristaltic pump. In the first activated sludge plant, the hydraulic retention time is 20.0h, the reflux ratio is 1, the water temperature is 30.0°C, the settling time of 1# settling tank is 4.1h, and the effluent COD of 1# settling tank Cr It is 182mg / L. In the second activated sludge plant, the hydraulic retention time is 20.0h, the reflux ratio is 1, the water temperature is 30.0°C, the settling time in the 2# settling tank is 4.1h, and the effluent COD of the 2# settling tank Cr It is 105mg / L. The effluent of 2# sedimentation tank enters the biological aerated filter device, the hydraulic retention time is 2.0h, the water temperature is 14.0℃,...

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Abstract

The invention discloses a biochemical treatment process for ethylene waste lye. The invention is characterized in that: the process involves two activated sludge systems and a biological aerated filter system connected in series. The process includes: adding Thiomonas intermedia BCRC17547 into a first activated sludge system aeration reaction tank, adding Pseudomonas sp. XQ3m-2CCTCC M2010162 into a second activated sludge aeration reaction tank, adding Pseudomonas sp. XQ3e CCTCC M209182 into the biological aerated filter, mixing the ethylene waste lye subjected to wet oxidation pretreatment with low salinity organic sewage in a volume ratio of 1:3-1:12, adjusting the pH to 6.5, then letting the mixture enter the tandem reaction system to undergo reaction, and then discharging the clear liquid. The three tandem reaction tanks give full play to the respective speciality of each added strain, thus achieving functional complementation. The process provided in the invention has the advantages of good treatment effect on ethylene waste lye, strong impact resistance, stable effluent quality, and low treatment cost, etc.

Description

technical field [0001] The invention relates to a treatment method for organic sewage, in particular to a biochemical treatment process for ethylene waste lye after wet oxidation pretreatment. Background technique [0002] Ethylene waste lye is the waste liquid formed by acid gas produced in the ethylene production process after alkali washing treatment. Its composition is complex, generally containing 0.5-5% sodium sulfide, 1-3% sodium hydroxide, 1-10% Sodium carbonate, which also contains less other sulfur compounds and hydrocarbons, butter, etc., is a kind of organic sewage that is difficult to treat. In the prior art, there are mainly neutralization method, incineration method, oxidation method and the like in the treatment of waste ethylene lye. At present, the wet oxidation process is widely used to convert the sulfide in the waste caustic soda into sulfate, thiosulfate, sulfite, etc. However, only using the wet oxidation process can not make the sewage meet the disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/36
Inventor 肖梓军王相明郗丽君吕建仁
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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