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

Method for treating coal chemical industry wastewater by using completely-mixed anaerobic biofilm

A completely mixed technology for coal chemical wastewater, applied in biological treatment devices, biological water/sewage treatment, aerobic and anaerobic process treatment, etc., can solve problems such as low removal efficiency, long hydraulic retention time, and sludge loss , to achieve the effect of not easy to block plugging and short flow, not easy to lose, and increase the contact area

Inactive Publication Date: 2020-09-18
HARBIN INST OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of long hydraulic retention time, low removal efficiency and serious sludge loss in the existing traditional anaerobic process with anaerobic sludge as the main body when treating coal chemical wastewater, and provides a completely Method for treating coal chemical wastewater by mixed anaerobic biofilm

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

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0042] Specific implementation mode 1: This implementation mode is a method for treating coal chemical industry wastewater with a complete mixed anaerobic biofilm, which is specifically carried out according to the following steps:

[0043] 1. Hanging film: add filler to the reactor, and then put the mixture of aerobic sludge and water in the reactor to hang the film until the bacteria micelles can be observed on the surface of the filler, and put the aerobic sludge into the reactor. Empty; then put the mixture of anaerobic sludge and water in the reactor, at this time the COD value of the mixed liquid in the reactor is A, and the mixture of anaerobic sludge and water will form a film in the reactor to the reactor The COD value of the effluent is B, and the COD removal rate of B is 30% to 40% compared with A, then the film formation is completed;

[0044] The concentration of aerobic sludge in the mixture of aerobic sludge and water is 3000mg / L~4000mg / L;

[0045] The concentr...

specific Embodiment approach 2

[0073] Embodiment 2: This embodiment differs from Embodiment 1 in that the filler described in step 1 is a cube with a side length of 10 mm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0074] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aerobic sludge described in step 1 is the aerobic sludge cultivated by intermittent aeration of the bottom sludge of the secondary sedimentation tank of the urban sewage plant. Others are the same as those in Embodiment 1 or 2.

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 relates to a method for treating coal chemical industry wastewater, in particular to a method for treating coal chemical industry wastewater through a completely-mixed anaerobic biofilm.The invention aims to solve the technical problems of long hydraulic retention time, low pollutant removal efficiency and serious anaerobic sludge loss of a traditional coal chemical industry wastewater anaerobic treatment method in the prior art. A polyurethane filler is used as a carrier of an anaerobic biofilm in an anaerobic reactor, and the polyurethane filler is in a fluidized state throughstirring equipment. Compared with a traditional anaerobic process, the anaerobic sludge is not easy to lose; compared with a traditional biological membrane technology, the problems of filler blockage and short flow are not likely to happen, the contact area between coal chemical industry wastewater and a filler is increased, and the biological mass transfer process between the coal chemical industry wastewater and the filler is enhanced. A complete mixing form is adopted, the total phenol removal rate is 75%-81%, and the COD removal rate is 78%-87%. The method is applied to wastewater treatment.

Description

technical field [0001] The invention relates to a method for treating coal chemical wastewater. Background technique [0002] Coal chemical wastewater has the characteristics of large amount of wastewater, high content of phenolic pollutants, complex water quality components, and microbial inhibition. The difficulty of wastewater treatment restricts the development of the coal chemical industry to a certain extent. The anaerobic process is often used in the front end of the coal chemical wastewater process to improve the biodegradability of the wastewater and reduce the organic load of the subsequent process. However, the traditional anaerobic process with anaerobic sludge as the main body has many problems such as long hydraulic retention time, low removal efficiency and serious sludge loss. Contents of the invention [0003] The present invention aims to solve the technical problems of long hydraulic retention time, low removal efficiency and serious sludge loss in the ...

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
IPC IPC(8): C02F3/34C02F3/30C02F101/34
CPCC02F3/30C02F3/34C02F2101/345C02F2203/006
Inventor 马文成康珍钟丹
Owner HARBIN INST OF TECH