Sewage treatment system and technology with AxOx synchronous nitrogen and phosphorus removal

A technology for synchronous denitrification and dephosphorization, sewage treatment system, applied in water/sludge/sewage treatment, water treatment parameter control, aerobic and anaerobic process treatment, etc. The enrichment and utilization of bacteria and other bacteria, affecting the phosphorus release effect of phosphorus accumulating bacteria, and unfavorable simultaneous denitrification and phosphorus removal, etc., to achieve the effect of good simultaneous denitrification and phosphorus removal, high reliability, energy saving and stability

Active Publication Date: 2020-11-24
中生源(海南)生态环境发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are various types of simultaneous denitrification and phosphorus removal sewage treatment processes, all of which are based on AAO process and its deformation process. Due to the general shortage of carbon sources in urban sewage raw water in my country, it is not conducive to simultaneous denitrification and phosphorus removal. Higher emission standards, when using the existing synchronous denitrification and phosphorus removal technology, it is often necessary to adopt a large reflux ratio and add a large amount of carbon sources, flocculants and other chemicals, which causes a huge waste of energy and resources, and is difficult to Fundamentally break through the process bottleneck of synchronous denitrification and phosphorus removal. There is still competition between denitrifying bacteria and phosphorus accumulating bacteria (PAOs) for carbon sources, and nitrate affects the phosphorus release effect of phosphorus accumulating bacteria (PAOs). PAOs), denitrification phosphorus removal bacteria (DPAOs), gasification phosphorus removal bacteria and other problems such as enrichment and utilization

Method used

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  • Sewage treatment system and technology with AxOx synchronous nitrogen and phosphorus removal

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Embodiment 1

[0029] A sewage treatment process for AxOx synchronous denitrification and dephosphorization, comprising the following steps:

[0030] (1) Synchronously open the water inlets of the anaerobic unit A-I and the first anoxic unit A-i and the second anoxic unit A-i in the three circulating interactive water treatment subsystems, so that the raw sewage water enters the anaerobic unit A-I and the first anoxic unit A-i simultaneously. The oxygen unit A-i and the second anoxic unit A-i; the ratio of the water inflow of the anaerobic unit A-I to the sum of the water inflow of the three anoxic units A-i is 1:1, so as to realize dispersed multi-stage water inflow;

[0031] (2) The sludge deposited in the aerobic unit O, the first anoxic unit A-i and the second anoxic unit A-i passes through the communication port at the bottom of the aerobic unit O, the first anoxic unit A-i and the second anoxic unit A-i. The flow enters the aerobic unit X, and in the aerobic unit X, the muddy water is ...

Embodiment 2

[0039] The difference between this embodiment and embodiment 1 is that a biological fluidized bed spherical biofilm filler is set in the aerobic unit X, and a sludge discharge pipe is set in the aerobic unit O, and the effect is as follows:

[0040] (1) Cultivate the facultative microbial film in the facultative unit X to form a mud film symbiosis system and increase the microbial phase and microbial biomass of the system;

[0041] (2) The sewage and sludge are discharged from different channels, and the sludge rich in phosphorus is fully removed by setting a sludge outlet in the aerobic unit O.

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Abstract

The invention provides a sewage treatment system and technology with AxOx synchronous nitrogen and phosphorus removal. The sewage treatment system comprises an anaerobic unit A-I and three circulatinginteractive water treatment subsystems; according to the circulating interactive water treatment subsystems, the anaerobic unit A-I communicates with aerobiotic units O through anoxic units A to formlinear water treatment sections; each aerobiotic unit O sequentially communicates with a corresponding first anoxic unit A-i, a corresponding aerobiotic unit O1, a corresponding second anoxic unit A-i and the corresponding aerobiotic unit O of another circulating interactive water treatment subsystem to form a corresponding circulating water treatment section; and the aerobiotic units O1, the first anoxic units A-i and the second anoxic units A-i communicate with the anaerobic unit A-I through facultative units X to form interactive water treatment sections. The sewage treatment system and technology have an excellent synchronous nitrogen and phosphorus removal effect, enrichment and use of strains of DPAOs, PAOs, vaporization phosphorus removal bacteria and the like in the different units are effectively achieved at the same time, the system is low in sludge yield, efficient, energy-saving and high in running stability, and the effluent quality is good.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system for AxOx synchronous denitrification and phosphorus removal and a process thereof. Background technique [0002] There are various types of simultaneous denitrification and phosphorus removal sewage treatment processes, all of which are based on AAO process and its deformation process. Due to the general shortage of carbon sources in urban sewage raw water in my country, it is not conducive to simultaneous denitrification and phosphorus removal. Higher emission standards, when using the existing synchronous denitrification and phosphorus removal technology, it is often necessary to adopt a large reflux ratio and add a large amount of carbon sources, flocculants and other chemicals, which causes a huge waste of energy and resources, and is difficult to Fundamentally break through the process bottleneck of synchronous denitrification and phosphorus ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C02F3/30C02F101/10C02F101/16C02F101/30
CPCC02F3/30C02F2101/30C02F2209/08C02F2209/14C02F2101/105C02F2101/16Y02W10/10
Inventor王以知刘意成沈维军魏敬虎蒋倍科
Owner中生源(海南)生态环境发展有限公司