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Method for rapidly starting normal-temperature short-cut nitrification of municipal sewage by using acetaminophen

A technology of acetaminophen and short-range nitrification, which is applied in the field of rapid start-up of short-range nitrification of urban sewage at room temperature. It can solve the problems of flammable and explosive chlorides, long recovery time, and explosives, and achieve good sedimentation and drainage effects and simple and convenient operation. , the effect of simple operation

Inactive Publication Date: 2021-04-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these inhibitors have disadvantages, for example, NOB will produce adaptability to FA and FNA; chlorides are flammable and explosive, especially when mixed with impurities, and have high requirements for storage conditions; heavy metals will also have certain effects on AOB. The poison of poisoning, recovery time is longer, and the removal of heavy metal also can cause cost to increase in addition; Hydroxylamine is expensive (about 14 yuan per gram, is 31 times of paracetamol used in the present invention)

Method used

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  • Method for rapidly starting normal-temperature short-cut nitrification of municipal sewage by using acetaminophen
  • Method for rapidly starting normal-temperature short-cut nitrification of municipal sewage by using acetaminophen
  • Method for rapidly starting normal-temperature short-cut nitrification of municipal sewage by using acetaminophen

Examples

Experimental program
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Effect test

Embodiment example 1

[0040] Implementation case 1—the first treatment method: side stream immersion

[0041]The invention uses simulated domestic sewage as water inflow. Including milk powder, sucrose, starch, peptone, yeast extract, sodium acetate, NH 4 Cl, NaHCO 3 、KH 2 PO 4 、K 2 HPO 4 and trace elements. Activated sludge is a full-process nitrification sludge, and the full-process nitrification performance is as follows: figure 1 shown.

[0042] The quality of simulated domestic sewage is: NH 4 + -N is 55-65mg / L, NO 2 - -N and NO 3 - -N is below the detection limit, COD is 200-300mg / L.

[0043] The sludge concentration in the biochemical reactor is 3000mg / L, and it runs 4 cycles a day, each cycle includes five stages of water inflow for 2 minutes, aeration for 180 minutes, sedimentation for 30 minutes, drainage for 3 minutes, and idle time for 145 minutes; simulated domestic sewage as water inflow, Use the aeration device to aerate, the DO concentration is 2-7mg / L, and the pH is ...

Embodiment example 2

[0047] The second treatment method of implementation case 2: direct dosing.

[0048] The invention uses simulated domestic sewage as water inflow. Including milk powder, sucrose, starch, peptone, yeast extract, sodium acetate, NH 4 Cl, NaHCO 3 、KH 2 PO 4 、K 2 HPO 4 and trace elements. Activated sludge is a full-process nitrification sludge, and the full-process nitrification performance is as follows: figure 1 shown.

[0049] The quality of simulated domestic sewage is: NH 4 + -N is 55-65mg / L, NO 2 - -N and NO 3 - -N is below the detection limit, COD is 200-300mg / L.

[0050] The sludge concentration in the biochemical reactor is 3000mg / L, and it runs 4 cycles a day, each cycle includes five stages of water inflow for 2 minutes, aeration for 180 minutes, sedimentation for 30 minutes, drainage for 3 minutes, and idle time for 145 minutes; simulated domestic sewage as water inflow, Use the aeration device to aerate, the DO concentration is 2-7mg / L, and the pH is 7....

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Abstract

The invention discloses a method for rapidly starting normal-temperature short-cut nitrification of municipal sewage by utilizing acetaminophen, and belongs to the technical field of biological sewage treatment. Two treatment process, namely acetaminophen side flow soaking or direct addition of acetaminophen, are adopted to treat the activated sludge in the method, and then the treated activated sludge finally quickly starts short-cut nitrification by inhibiting the activity of NOB. The inhibitor can quickly start normal-temperature short-cut nitrification of municipal sewage.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, is suitable for enhanced biological denitrification of urban sewage with a low carbon-to-nitrogen ratio, and relates to a method for rapidly starting short-range nitrification of urban sewage at normal temperature. Background technique [0002] For urban sewage, the traditional denitrification method of "full nitrification-denitrification" is a stable but energy-intensive method, and requires additional carbon sources, which no longer meets the requirements of sustainable development. The whole process of nitrification-denitrification is: (1) Aerobic nitrification process: ammonia oxidizing bacteria (AOB) in sewage convert ammonia nitrogen into nitrite, and then nitrite oxidizing bacteria (NOB) convert nitrite into nitric acid (2) Denitrification process: denitrifying bacteria use organic matter in sewage as electron donors and nitrate as electron acceptors to convert nitrate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 高景峰单家林崔影超
Owner BEIJING UNIV OF TECH
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