Device and method for forming and separating elemental sulfur in situ

An elemental sulfur, in-situ technology, applied in sterilization methods, methods of supporting/immobilizing microorganisms, chemical instruments and methods, etc., can solve problems such as drainage pipeline corrosion, low elemental sulfur generation rate, and poisoning water organisms.

Active Publication Date: 2018-11-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, a considerable part comes from petroleum refining, papermaking, slaughtering, and pharmaceutical industries. It is inevitable to produce a large amount of wastewater containing sulfate, sulfide, ammonia nitrogen/nitrate in the production process of these industries. If this type of wastewater is not properly treated, it will produce Great harm: (1) Sulfate. Excessive discharge of sulfate will increase the concentration of sulfate in the water. If the water contains high sulfate (>400mg/L), there will be a sense of bitterness. If it reaches 1000~ 1200mg/L will cause diarrhea; secondly, the natural environment and wastewater are often rich in a large a

Method used

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  • Device and method for forming and separating elemental sulfur in situ
  • Device and method for forming and separating elemental sulfur in situ
  • Device and method for forming and separating elemental sulfur in situ

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, a device for forming and separating elemental sulfur in situ of the present invention includes a reaction device 1, a liquid collection device 2, an argon gas cylinder 3, a feeding device 4, a gas collection device 5, a water storage device 6, a pump 7. Pressure gauge 8; the reaction device 1 is a biofilm-microfiltration membrane composite reaction device, and the liquid collection device 2 is arranged below the reaction device 1, and the liquid collection device 2 can collect the elemental sulfur generated by the reaction device 1; The steel cylinder 3 is connected to the reaction device 1 through the first pipeline 31, and the argon gas cylinder 3 can feed argon gas into the reaction device 1 to ensure that the reaction device 1 is always in a completely anaerobic environment, and also to ensure the internal and external pressure of the reaction device 1 system. be consistent.

[0037] A feeding device 4 is also arranged between the argon c...

Embodiment 2

[0043] A method for forming and separating elemental sulfur in situ, comprising the following steps:

[0044] S1. Pass inert gas such as argon into the reaction device to keep the reaction device in an anaerobic state;

[0045] S2, the reaction device is provided with a separation membrane, the separation membrane is a biofilm-microfiltration membrane double-layer structure, the flow direction of the liquid in the reaction device is to flow through the biofilm first, and then pass through the microfiltration membrane. Sulfur-oxidizing bacteria first contact the wastewater to be treated with the biofilm to generate nitrogen and carbon dioxide gas and elemental sulfur solids on the biofilm;

[0046] S3. The nitrogen and carbon dioxide gas in the reaction device is discharged and collected, and the elemental sulfur generated on the biofilm is separated from the biofilm through the microfiltration membrane, and the microfiltration membrane prevents the passage of sulfur-oxidizing ...

Embodiment 3

[0051] In this embodiment, on the basis of the second embodiment, a driving device such as a peristaltic pump is added to the method, which can drive the wastewater to flow through the biofilm and the microfiltration membrane in sequence.

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Abstract

The invention discloses a device and a method for forming and separating elemental sulfur in situ. The device comprises a reaction device and a collection device, wherein a separation membrane is arranged in the reaction device, is of a biological membrane-microfiltration membrane double layer structure and divides the reaction device into a reaction zone and an accumulation zone, a biological membrane is located on the side of the reaction zone, and a microfiltration membrane is located on the side of the accumulation zone; the collection device is divided into a gas collection device and a liquid collection device, the gas collection device collects gas discharged from the reaction device, the liquid collection device collects liquid and solid discharged from the reaction device, the gascollection device is connected to the reaction zone, and the liquid collection device is connected to the accumulation zone. The device introduces a concept of forming and separating solid particlesin situ into a membrane bioreactor, uses water flow pressure to drive elemental sulfur formed on the surface of microorganism to pass through the microfiltration membrane, and collects the elemental sulfur passing through the microfiltration membrane in time, so that no excessive oxidation or reduction of elemental sulfur occurs when sulfide is oxidized to elemental sulfur.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a device and method for forming and separating elemental sulfur in situ. Background technique [0002] With the rapid development of my country's economy, the improvement of public environmental awareness, and the increase of government investment, the total COD discharge of wastewater in China in 2015 decreased by 11.37% compared with 2012, but it was still as high as 21.481 million tons. Among them, a considerable part comes from petroleum refining, papermaking, slaughtering, and pharmaceutical industries. It is inevitable to produce a large amount of wastewater containing sulfate, sulfide, ammonia nitrogen / nitrate in the production process of these industries. If this type of wastewater is not properly treated, it will produce Great harm: (1) Sulfate. Excessive discharge of sulfate will increase the concentration of sulfate in the water. If the water contains high sulfate (>...

Claims

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Application Information

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IPC IPC(8): C02F9/14C12M1/34C12M1/12C12M1/107C12M1/04C12M1/00C12P3/00
CPCC02F1/444C02F3/34C02F3/345C02F9/00C02F2301/08C12M21/04C12M23/34C12M25/02C12M29/00C12M29/14C12M29/20C12M41/40C12M47/10C12P3/00
Inventor 黄聪王爱杰李智灵陈帆赵友康
Owner HARBIN INST OF TECH
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