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Continuous biological nitrogen and phosphorus removal recovery system and continuous biological nitrogen and phosphorus removal recovery technology

A technology for biological denitrification and phosphorus recovery, applied in sustainable biological treatment, biological water/sewage treatment, aerobic and anaerobic process treatment, etc. The problem of high cost, to achieve the effect of promoting enrichment, optimizing phosphorus removal performance, and improving denitrification efficiency

Active Publication Date: 2020-01-10
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing urban sewage treatment plants mainly remove phosphorus in sewage by discharging excess sludge, and seldom consider the recycling of phosphorus resources. The methods for recovering phosphorus from mud all have problems such as energy dissipation, large amounts of greenhouse gas generation, and high economic costs.

Method used

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  • Continuous biological nitrogen and phosphorus removal recovery system and continuous biological nitrogen and phosphorus removal recovery technology
  • Continuous biological nitrogen and phosphorus removal recovery system and continuous biological nitrogen and phosphorus removal recovery technology
  • Continuous biological nitrogen and phosphorus removal recovery system and continuous biological nitrogen and phosphorus removal recovery technology

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Embodiment 1

[0034] A continuous biological denitrification and phosphorus recovery process in this embodiment includes: A / O process (anaerobic tank, aerobic tank, secondary sedimentation tank) and biofilm process.

[0035] see figure 2 , in embodiment 1, there are at least 2 biofilm reactors running in parallel, below are example with 3 groups of identical biofilm reactors, have following three kinds of working conditions (dashed line represents valve is in closing stage).

[0036] image 3 The operating state of working condition 1 is shown, biofilm reactor A is in the water intake stage, biofilm reactor B is in the anaerobic recovery stage, and biofilm reactor C is in the aerobic stage. Open valve 2, phosphorus-containing wastewater from the A / O system enters biofilm reactor A equipped with aeration device; at the same time, biofilm reactor B is in the anaerobic recovery stage, open valve 9, due to gravity, The phosphorus-rich base solution in the high-level recovery tank flows direc...

Embodiment 2

[0042] The continuous biological denitrification and phosphorus recovery process of this embodiment includes: A / O process (anaerobic tank, aerobic tank, secondary sedimentation tank) and biofilm process.

[0043] see Figure 7 As shown, in embodiment 2, there are at least 2 biofilm reactors running in parallel, and below are 3 groups of identical biofilm reactors as an example, with the following two working conditions (the dotted line represents the valve in the closed stage).

[0044] Figure 8 It shows the operating state of working condition 1, biofilm reactor A is in the water intake stage, biofilm reactor B is in the anaerobic recovery stage, and biofilm reactor C is in the aerobic stage. Open valve 2, the phosphorus-containing wastewater from the A / O system enters biofilm reactor A equipped with aeration device; at the same time, biofilm reactor B is in the anaerobic recovery stage, open valves 10 and 11, low-level The recovery solution in the recovery tank is pumped ...

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Abstract

The invention discloses a continuous biological nitrogen and phosphorus removal recovery system. The system comprises an A / O system and a plurality of bio-membrane reactors arranged behind the A / O system in parallel, an aeration device is arranged in each bio-membrane reactor, and each bio-membrane reactor is rich in phosphorus-accumulating bacteria; the plurality of bio-membrane reactors are allcommunicated with the A / O system, and valves for controlling on-off are arranged on passages; and a phosphorus recovery tank is arranged behind the bio-membrane reactors and is communicated with the plurality of bio-membrane reactors. The invention also provides a continuous biological nitrogen and phosphorus removal recovery technology. The continuous biological nitrogen and phosphorus removal recovery technology has a good nitrogen removal effect, and synchronously achieves removal of phosphorus and enrichment of a phosphate solution.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a continuous biological denitrification and phosphorus recovery system and process. Background technique [0002] Phosphorus is an important resource that is scarce and polluting. If the discharged sewage contains more phosphorus, it will lead to eutrophication of the water body and affect the healthy development of the water system. If the phosphorus can be recovered, it will not only avoid the eutrophication of the water body It can also realize the recycling of phosphorus resources, which has both economic and environmental benefits. [0003] Existing urban sewage treatment plants mainly remove phosphorus in sewage by discharging excess sludge, and seldom consider the recycling of phosphorus resources. The methods for recovering phosphorus from mud all have problems such as energy dissipation, large amount of greenhouse gas generation, and high economic cost. Conte...

Claims

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Application Information

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IPC IPC(8): C02F3/10C02F3/12C02F3/28C02F3/30C02F3/34C02F101/10C02F101/16C02F101/38
CPCC02F3/10C02F3/1263C02F3/2806C02F3/282C02F3/302C02F3/34C02F2101/105C02F2101/16C02F2101/38Y02W10/10
Inventor 潘杨章豪黄勇单捷冯鑫杨婉静
Owner SUZHOU UNIV OF SCI & TECH
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