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Sewage treatment method and system for realizing in-situ improvement of treatment scale

A sewage treatment method and large-scale technology, applied in water/sewage treatment, flotation water/sewage treatment, water/sewage treatment equipment, etc., can solve the problems of poor sludge settling performance, unreachable treatment scale, overflow pollution, etc. problems, to achieve the effect of improving the settlement performance, increasing the scale of sewage treatment, and increasing the amount of water inflow

Active Publication Date: 2020-08-14
北京博泰至淳生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the first object of the present invention is to provide a sewage treatment method that can increase the scale of treatment in situ. It has the advantages of solving the problem of reaching the production capacity and solving the problem of overflow pollution caused by the overload of sewage treatment plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example preparation example 1

[0055] The preparation of nano flocculant comprises the following steps:

[0056] S1. Add 0.5kg 3-mercaptopropyltriethoxysilane and 10kg water into the ultrasonic reactor, turn on the ultrasonic reactor, set the frequency of the ultrasonic reactor to 100Hz, and then add 2kg Fe under ultrasonic stirring 3 o 4 (add in 4 batches, add 0.5kg for each batch, and the time interval between adjacent batches is 30min), until it is completely dissolved and dispersed into the solution, then ultrasonically treat for 45min, close the ultrasonic reactor, and stand for 24h to prepare the mixed solution Ⅰ ;

[0057] S2, add 8.5kg of polyacrylamide and 49kg of water into a medium-temperature reactor at a temperature of 55°C, stir while adding at a stirring speed of 1500r / min, and stir evenly to obtain a mixed solution II;

[0058] S3, under anaerobic condition and the speed of stirring is the environment of 500r / min, with 25kg FeCl 2 Add to mixed solution II, stir while adding, and stir even...

preparation example 2

[0062] The preparation of nano flocculant comprises the following steps:

[0063] S1. Add 1kg 3-mercaptopropyltriethoxysilane and 20kg water into the ultrasonic reactor, turn on the ultrasonic reactor, set the frequency of the ultrasonic reactor to 100Hz, and then add 0.2kg Fe under ultrasonic stirring 3 o 4 , until completely dissolved and dispersed into the solution, then ultrasonically treated for 45 minutes, closed the ultrasonic reactor, and left standing for 24 hours to obtain the mixed solution Ⅰ;

[0064] S2, add 7kg of polyacrylamide and 47.8kg of water into a medium-temperature reactor at a temperature of 55°C, stir while adding at a stirring speed of 1500r / min, and stir evenly to obtain a mixed solution II;

[0065] S3, under anaerobic condition and the speed of stirring is the environment of 500r / min, with 30kg FeCl 2 Add to mixed solution II, stir while adding, and stir evenly to obtain mixed solution III;

[0066] S4. Mix the mixed solution I with the mixed so...

preparation example 3

[0069] The preparation of nano flocculant comprises the following steps:

[0070] S1. Add 1.5kg 3-mercaptopropyltriethoxysilane and 15kg water into the ultrasonic reactor, turn on the ultrasonic reactor, set the frequency of the ultrasonic reactor to 100Hz, and then add 1kg Fe under ultrasonic stirring 3 o 4(add in 2 batches, add 0.5kg for each batch, and the time interval between adjacent batches is 30min), until it is completely dissolved and dispersed into the solution, then ultrasonically treat for 45min, close the ultrasonic reactor, and stand for 24h to prepare the mixed solution Ⅰ ;

[0071] S2, add 10kg of polyacrylamide and 34.5kg of water into a medium-temperature reactor at a temperature of 55°C, stir while adding at a stirring speed of 1500r / min, and stir evenly to obtain a mixed solution II;

[0072] S3, under anaerobic condition and the speed of stirring is the environment of 500r / min, with 35kg FeCl 2 Add to mixed solution II, stir while adding, and stir even...

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Abstract

The invention discloses a sewage treatment method and system for realizing in-situ improvement of a treatment scale, and relates to the technical field of sewage treatment. The sewage treatment methodcomprises the following steps of pretreatment, biological nitrogen and phosphorus removal, dosing and mixing, mud-water separation and the like, and has the advantages that the problem that the sludge settling performance is poor and the treatment scale cannot reach the standard due to sludge bulking of a sewage treatment plant in winter can be solved, and the problem of overflow pollution causedby overload of a sewage treatment plant can also be solved. The system comprises a pretreatment unit, a biological nitrogen and phosphorus removal treatment unit, a mixing unit and a precipitation unit which are sequentially communicated in the water flow direction, wherein a feeding end of the mixing unit is further communicated with a dosing unit; and a sludge reflux unit is communicated between the precipitation unit and the biological nitrogen and phosphorus removal treatment unit. The system disclosed by the invention can be suitable for the sewage treatment method disclosed by the invention without expanding or extending the capacity of the system, the treatment scale can be improved in situ, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, more specifically, it relates to a sewage treatment method and system for realizing in-situ increased treatment scale. Background technique [0002] At present, the operation of sewage treatment plants in my country has seasonal problems. For example, activated sludge is prone to sludge expansion in winter, resulting in reduced performance of activated sludge and poor settling performance. The mud level at the bottom of the secondary sedimentation tank increases, and secondary sedimentation tanks are prone to The problem of mud running, once the mud runs out, the sewage treatment plant will inevitably reduce the scale of treatment and reduce the inflow of sewage in order to achieve standard discharge; and in summer, because more than 70% of my country's urban drainage network pipes use rainwater (rainwater and urban sewage) to merge , so that a large amount of rainwater enters the sewage t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F2001/007C02F1/52C02F1/001C02F1/24C02F3/30C02F2201/002
Inventor 汪翠萍潘建通郑淑文陈凯华秦梓耕王战台张阳阳赵婷婷朱琳琳
Owner 北京博泰至淳生物科技有限公司