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Upgrading reconstruction system and upgrading reconstruction technology for sewage treatment plant

A sewage treatment plant and sewage technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problems of single function of aerobic pool and high energy consumption, Achieve the effect of easy maintenance, increase processing capacity and reduce energy consumption

Pending Publication Date: 2019-05-21
ZHEJIANG DEAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aerobic pool has a single function. It promotes the growth of aerobic bacteria in the pool through continuous aeration of the whole pool for a long time, and the energy consumption is high.

Method used

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  • Upgrading reconstruction system and upgrading reconstruction technology for sewage treatment plant
  • Upgrading reconstruction system and upgrading reconstruction technology for sewage treatment plant
  • Upgrading reconstruction system and upgrading reconstruction technology for sewage treatment plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: A kind of sewage treatment plant upgrades and transforms the system, comprises biochemical treatment device, and biochemical treatment device comprises interlinked biochemical tank and secondary settling tank, and biochemical tank comprises anaerobic tank, anoxic tank and Aerobic pool 1, 2n mutually independent (n is a positive integer) aeration tube units are arranged in turn in the aerobic pool 1, such as figure 2 As shown, each aeration tube unit includes a perforated aeration tube 21, and the perforated aeration tube 21 is laid on the bottom of the aerobic tank 1, and the air inlet of the perforated aeration tube 21 communicates with the aeration device 3 through a valve 22 , so that the inner cavity of the aerobic tank 1 is divided into 2n aeration units.

[0026] In Example 1, each valve 22 connected to the 2n aeration tube units is electrically connected to a control unit (not shown in the figure), and the control unit is used to control the openin...

Embodiment 2

[0027] The sewage treatment plant upgrading transformation system of embodiment 2 differs from embodiment 1 in that in embodiment 2, such as image 3 As shown, the aerobic pool 1 is filled with an AO reactor 4 with a height of 1 to 5m. In Example 2, as Figure 4 As shown, each AO reactor 4 includes a spherical shell 41, the shell 41 is provided with a plurality of through holes 42, the outer surface of the shell 41 is provided with a plurality of protrusions 43 at intervals, and the shell 41 has a cavity , the cavity is filled with an anaerobic carrier (not shown in the figure), and anaerobic bacteria are attached to the anaerobic carrier.

[0028] In Embodiment 2, the height of each protrusion is 5% to 10% of the housing diameter, and the area of ​​the bottom surface where the plurality of protrusions are connected to the housing is 4×10 of the surface area of ​​the housing. -4 ~9×10 -4 , the opening ratio of the plurality of through holes is 70% to 80% of the surface area ...

Embodiment 3

[0030] The difference between the sewage treatment plant improvement system in Example 3 and Example 2 is that in Example 3, the aerobic pool 1 is equipped with multiple online dissolved oxygen detection sensors (not shown in the figure), and multiple online dissolved oxygen The probes of the oxygen detection sensors are submerged in different positions of the water body in the aerobic pool 1, and multiple online dissolved oxygen detection sensors are respectively electrically connected to a PLC control module (not shown in the figure), and the aeration device 3 includes a frequency conversion blower (Fig. not shown), the PLC control module is electrically connected to the frequency conversion blower, and multiple online dissolved oxygen detection sensors are used to detect the dissolved oxygen concentration in different positions of the water body in the aerobic pool 1 in real time and transmit the detection results to the PLC control in the form of signals Module, the PLC con...

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Abstract

The invention discloses an upgrading reconstruction system and an upgrading reconstruction technology for a sewage treatment plant. The upgrading reconstruction system comprises a biochemical treatment device, the biochemical treatment device comprises a biochemical tank and a secondary sedimentation tank which are communicated, the biochemical tank comprises an anaerobic tank, an anoxic tank andan aerobic tank which are sequentially arranged along the sewage flowing direction, at least two mutually-independent aeration tubes are sequentially arranged in the aerobic tank, every aeration tubeunit comprises a perforated aeration tube, the perforated aeration tubes are laid at the bottom of the aerobic tank, and the gas inlets of the perforated aeration tubes are communicated with an aeration device via valves to divide the inner cavity of the aerobic tank into the at least two aeration units. The front section of the aerobic tank undergoes upgrading reconstruction, so energy is effectively saved by 30-40%, the treatment capacity is increased by 30% or above, the removal rate of COD, NH3-N, TN and TP is effectively improved, and the purposes of energy saving, synergy and volume expansion are achieved, so the system and the technology reduce the load pressure of subsequent devices and processes, and are very suitable for the upgrading reconstruction of existing old sewage treatment plants.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment plant upgrading and transformation system and process. Background technique [0002] In the current sewage treatment, according to the characteristics of good biodegradability of sewage, the biological treatment process is mostly used as the core process. The process is mainly divided into two categories, one is the activated sludge method, and the other is the biofilm method. [0003] Common activated sludge methods are: A / O, A 2 / O, oxidation ditch, SBR and other processes; common biofilm methods include MBR, contact oxidation, biological turntable, biofilter and other forms. As the emission standards become more and more stringent, many old sewage treatment plants are facing upgrading and transformation. At present, the common technology for upgrading and upgrading is to add advanced treatment process behind the old process. However, some biochem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F101/16C02F101/30C02F101/38
Inventor 俞建德曹霞
Owner ZHEJIANG DEAN TECH