Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of pretreatment method of hydrolytic acidification detoxification industrial wastewater

A technology of hydrolysis and acidification of industrial wastewater, applied in biological water/sewage treatment, water/sludge/sewage treatment, anaerobic digestion treatment, etc., can solve the problem of low capacity of industrial wastewater containing toxic organic substances, shorten the start-up time, Improve the effect of precise pollution control and load increase

Active Publication Date: 2022-02-18
北京铭泽源环境工程有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the relatively low defect of the ability to process industrial wastewater containing toxic organic substances in the two-phase anaerobic hydrolysis acidification section in the prior art, thereby providing a method of shortening the start-up time and improving the after-start Pretreatment method of hydrolytic acidification detoxification industrial wastewater that can bear the load

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of pretreatment method of hydrolytic acidification detoxification industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A pretreatment method for hydrolytic acidification and detoxification industrial wastewater,

[0028] This example is carried out in an anaerobic granular sludge expanded bed reactor (EGSB). The inoculated anaerobic granular sludge is taken from a methanogenic reactor. The EGSB operates continuously, and the concentration of the anaerobic granular sludge is 15g / L. . The structure of the EGSB reactor is as follows figure 1 As shown, it includes a reactor 1 made of plexiglass material. The reactor 1 is provided with sampling ports a, b, c, and d along different heights. The effective volume of the reactor 1 is 1.72L. Wherein, the height of the reaction zone of the reactor 1 is 1500 mm, and the inner diameter of the reaction zone is 30 mm. The crotonaldehyde waste water is injected from the bottom of the reactor 1 by the first peristaltic pump 2, and an adjustable three-phase separator 3 is installed on the top of the reactor 1, and the mud-water mixture and gas are effe...

Embodiment 2

[0036] The difference between this example and Example 1 is that this example uses an upflow anaerobic sludge bed reactor (UASB), and the concentration of anaerobic granular sludge is 6g / L. Surfactants and nutrients are added to the crotonaldehyde production wastewater, wherein the nutrients are ammonium chloride and dihydrogen phosphate. After the nutrients are added, the COD:N:P ratio in the crotonaldehyde production wastewater is 500:5:1, and at the same time , the surfactant is rhamnolipid, and the addition amount of the surfactant is 0.07g / g dry anaerobic granular sludge; the pH is adjusted to 8.

[0037] The inflow velocity of the upflow anaerobic sludge bed reactor is 1.73m / h, the reflux ratio is 0, the residence time is 24h, and the temperature is 35°C.

[0038] The start-up time of the test sample in this embodiment is about 52d, and the load that can be borne after start-up is 3.9kgCOD / m 3 d; Under the maximum load that can be tolerated, the specific methanogenic acti...

Embodiment 3

[0040] The difference between this example and Example 1 is that this example uses an internal circulation anaerobic reactor (IC), and the concentration of anaerobic granular sludge is 30 g / L. Surfactants and nutrients are added to the crotonaldehyde production wastewater, wherein the nutrients are ammonium chloride and dihydrogen phosphate. After the nutrients are added, the COD:N:P ratio in the crotonaldehyde production wastewater is 100:5:1, and at the same time , the surfactant is an alkyl polyglycoside, and the addition amount of the surfactant is 0.005g / g dry anaerobic granular sludge; the pH is adjusted to 6.

[0041] The inflow velocity of the upflow anaerobic sludge bed reactor is 1.73m / h, the reflux ratio is 30, the residence time is 24h, and the temperature is 20°C.

[0042] The start-up time of the test sample in this embodiment is about 38 days, and the load that can be borne after start-up is 5.1kgCOD / m 3 d; Under the maximum load that can be tolerated, the spec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a pretreatment method for hydrolysis, acidification and detoxification of industrial waste water, which comprises: adding a surfactant into the industrial waste water, and then passing the industrial waste water added with the surfactant into a continuous method inoculated with anaerobic granular sludge It only needs to be treated in a reactor; the mass ratio of the surfactant to the anaerobic granular sludge is 0.005-0.07:1. The invention can effectively promote the tolerance of anaerobic granular sludge to toxic organic substances in a continuous reactor through the surfactant, strengthen the hydrolysis ability of anaerobic granular sludge to organic substances in industrial wastewater, and further improve the anaerobic granular sludge. The ability to produce acid can effectively shorten the start-up time of the continuous reactor and increase the load that can be withstood after start-up; improve the level of precise and scientific pollution control of industrial wastewater.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a pretreatment method for industrial wastewater. Background technique [0002] Industrial wastewater has always been the difficulty and focus in the field of water treatment in my country. Industrial wastewater usually contains high concentrations of toxic organic substances. Such pollutants have a significant inhibitory effect on microorganisms, especially toxic organic substances on methanogens, making it difficult for this type of industrial wastewater to be treated by low-cost anaerobic methanogenesis. [0003] The toxicity of organic matter to microorganisms is not only related to the nature of the organic matter itself, but also related to the concentration of the organic matter, and also related to the type of microorganisms. In the existing two-phase anaerobic process, based on the two-phase anaerobic theory, the anaerobic process can be divided into an acid-producing pha...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F101/30
CPCC02F3/28C02F3/2866C02F2305/04C02F2101/30
Inventor 沈志强周岳溪
Owner 北京铭泽源环境工程有限公司