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A method for low-temperature treatment of domestic sewage based on a-sbr process to simultaneously remove carbon, nitrogen and phosphorus

A technology of A-SBR and domestic sewage, applied in the direction of aerobic and anaerobic process treatment, water treatment under temperature conditions, sustainable biological treatment, etc., can solve the problems of slow start-up, poor nitrogen and phosphorus removal effect, and promote application , easy to obtain, and the effect of improving the efficiency of carbon, nitrogen, and phosphorus removal

Active Publication Date: 2022-03-01
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of poor denitrification and phosphorus removal effect and slow start-up of domestic sewage under low temperature conditions, the present invention provides a method for synchronous decarbonization, nitrogen and phosphorus removal of domestic sewage based on the A-SBR process. The process is applied to the treatment of domestic sewage under low temperature conditions, which can improve the removal efficiency of carbon, nitrogen and phosphorus pollutants in sewage while saving infrastructure costs, and effectively improve the treatment efficiency of sewage plants under low temperature conditions

Method used

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  • A method for low-temperature treatment of domestic sewage based on a-sbr process to simultaneously remove carbon, nitrogen and phosphorus
  • A method for low-temperature treatment of domestic sewage based on a-sbr process to simultaneously remove carbon, nitrogen and phosphorus
  • A method for low-temperature treatment of domestic sewage based on a-sbr process to simultaneously remove carbon, nitrogen and phosphorus

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Effect test

Embodiment 1

[0024] A method for low-temperature treatment of domestic sewage based on A-SBR process for synchronous decarbonization, denitrification and dephosphorization, consisting of the following steps:

[0025] 1. Low-temperature start-up of the A-SBR process: Inoculate ordinary activated sludge into the A-SBR reactor. Under normal temperature conditions, artificial water distribution is used to domesticate the sludge. 4 + -The concentration of N, TN and TP is consistent with the concentration in the domestic sewage to be treated in the later stage. Adjust the pH at 6.5-7.5, the temperature at 26-30°C, and adjust the time of anaerobic, anoxic and aerobic stages. The enrichment can Simultaneous removal of microorganisms of carbon, nitrogen and phosphorus; when COD, NH 4 + -The average removal rates of N, TN and TP are over 95%, 97%, 92% and 92% respectively, and keep running stably for 10-15 cycles; the temperature is lowered to 18-22°C first by adopting a step-by-step cooling metho...

Embodiment 2

[0035] A method for low-temperature treatment of domestic sewage based on A-SBR process for synchronous decarbonization, denitrification and dephosphorization, consisting of the following steps:

[0036] 1. Low-temperature start-up of the A-SBR process: Inoculate ordinary activated sludge into the A-SBR reactor. Under normal temperature conditions, artificial water distribution is used to domesticate the sludge. 4 + -The concentration of N, TN and TP is consistent with the concentration in the domestic sewage to be treated in the later stage. Adjust the pH at 7.0, the temperature at 28°C, and adjust the time of anaerobic, anoxic and aerobic stages. Enrichment can simultaneously remove carbon and nitrogen Phosphorus microorganisms; when COD, NH 4 + -The average removal rates of N, TN and TP reached 95%, 97%, 92% and 92% respectively, and kept running stably for 10 cycles; the method of step-by-step cooling was adopted, and the temperature was first lowered to 20°C, and the ab...

Embodiment 3

[0046] A method for low-temperature treatment of domestic sewage based on A-SBR process for synchronous decarbonization, denitrification and dephosphorization, consisting of the following steps:

[0047] 1. Low-temperature start-up of the A-SBR process: Inoculate ordinary activated sludge into the A-SBR reactor. Under normal temperature conditions, artificial water distribution is used to domesticate the sludge. 4 + -The concentration of N, TN and TP is consistent with the concentration in the domestic sewage to be treated in the later stage. Adjust the pH at 6.5, the temperature at 26°C, and adjust the time of anaerobic, anoxic and aerobic stages. Enrichment can simultaneously remove carbon and nitrogen Phosphorus microorganisms; when COD, NH 4 + - The average removal rates of N, TN and TP reached over 95%, 97%, 92% and 92% respectively, and kept running stably for 12 cycles; the method of step-by-step cooling was adopted, firstly, the temperature was lowered to 18°C, and t...

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Abstract

The invention discloses a method for low-temperature treatment of domestic sewage based on the A-SBR process for simultaneous decarbonization, nitrogen, and phosphorus removal. After operation, it has a high removal rate of carbon, nitrogen and phosphorus; adopt the method of step-by-step cooling, first reduce the temperature to 18‑22 °C, after the removal rate of carbon, nitrogen and phosphorus is stable, then further reduce the temperature to 12‑16 °C, the same , when the C, N, P removal rate of the system is stable, it is considered that the microorganisms that simultaneously remove carbon, nitrogen, and phosphorus under low temperature conditions are enriched, and the A‑SBR process is successfully started; gradually add actual domestic sewage, and finally realize the carbon, nitrogen, and phosphorus in domestic sewage synchronization removal. The invention solves the problems of poor denitrification and phosphorus removal effect and slow start-up of domestic sewage under low-temperature conditions, and realizes fast start-up and high-efficiency simultaneous removal of carbon, nitrogen and phosphorus under low-temperature conditions.

Description

technical field [0001] The invention belongs to the field of urban domestic sewage treatment and resource utilization, and in particular relates to a method for synchronously removing carbon, nitrogen, and phosphorus from domestic sewage at low temperature based on the A-SBR process. Background technique [0002] The SBR process is a widely used biological nitrogen and phosphorus removal process. Different reactions in a single reactor complete the removal of carbon, nitrogen, and phosphorus pollutants. It is one of the more commonly used and effective biological nitrogen and phosphorus removal methods, but it is difficult The pollutant removal efficiency of the system can be further improved by adjusting the parameters. A-SBR is an improved process based on the traditional SBR process by adding an anoxic operation stage. The anoxic stage can further improve the denitrification and phosphorus removal efficiency of the reaction system through denitrification and phosphorus re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/12
CPCC02F3/1263C02F3/301C02F3/308C02F2209/06C02F2209/08C02F2209/16C02F2209/22C02F2209/44C02F2301/10Y02W10/10
Inventor 刘淑丽付金伟刘秉涛赵维妍
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER