A/O type biological aeration capacity-enlarging method for sewage water treatment factory

A technology of biological aerated filter and sewage treatment plant, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., to achieve the effect of less land occupation and water quality improvement

Active Publication Date: 2007-07-18
GANSU GOLDEN BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This A / O type biological aeration filter is used as secondary treatment equipment for urban sewage treatment, but there are still some problems as capacity expansion equipment

Method used

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  • A/O type biological aeration capacity-enlarging method for sewage water treatment factory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: See Figure 1, a certain urban sewage treatment plant with a treatment volume of 20,000 m 3 / d. The effluent quality does not meet the new discharge standards. It is required to use A / O type biological aeration filter for capacity expansion, the specific method is:

[0035] A. First measure the effluent quality of the secondary settling tank and the primary settling tank and determine the discharge standards that need to be met:

[0036] a. Determination of the effluent water quality of the secondary sedimentation tank C 1，COD =50mg / L; C 1，BOD5 =20mg / L; C 1，TN =28 mg / L; C 1NH3-N =18 mg / L; C 1，NOX-N =8 mg / L; C 1，SS = 30 mg / L; Tp = 2 mg / L.

[0037] b. Determination of the effluent water quality of the primary sedimentation tank: C 2，COD =220mg / L; C 2，BOD5 =110 mg / L; C 2，TN = 35 mg / L; C 2，NH3-N =30mg / L; C 2，NOX-N =1 mg / L; C 2，SS =80mg / L; Tp≤2mg / L.

[0038] c. The discharge standard that needs to be met is the first-class B standard in the "Pollutio...

Embodiment 2

[0048] Example 2: A city sewage treatment plant with a treatment volume of 30,000 m3 3 / d, all water quality indicators of the effluent have met the requirements of the sewage discharge standard. Now the plant is undergoing expansion construction to further improve the quality of effluent water. The effluent water will be used as landscape environment water in nearby scenic spots. The plan for expansion construction is selected as A / O type biological aeration three-stage treatment, so that the effluent water quality can fully meet the "Sewage Reclamation Use the water quality standards for ornamental environmental water (lakes) in the Engineering Design Code (GB50335-2002).

[0049] A. First measure the effluent quality of the secondary settling tank and the primary settling tank and determine the discharge standards that need to be met:

[0050] 1. Water quality of secondary sedimentation tank effluent:

[0051] C 1，COD =40mg / L C 1 ,=12mg / L

[0052] C 1，TN =20mg / L C 1 ...

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Abstract

The invention relates to a method of enlarging volume of the sewage plant using A / O type bio-aeration filter. Including: first measure the outlet-water quality of second-settling tank, prime settling tank and make sure to achieve the outlet-water quality standards; set water-intake balancing tank (4) on water-outlet end of said second settling pool (1) which introduces water (Q1) to water-intake balancing tank (4) which is connected to by tertiary sewage treatment A / O type bio-aeration filter; introduce water (Q2) from one-level effluent-handling prime settling tank (2) or / and re-circulated water (Q3) to water-intake balancing tank (4) from the water-outlet end (371) of tertiary sewage treatment A / O type bio-aeration filter (3); the water outlet of water-intake balancing tank (4) is prompted to high-level tank (33) by lift pump (32) and imported to the pebble supporting layer (34) at the bottom of the tertiary sewage treatment A / O type bio-aeration filter through the water-outlet end of high-level tank (33); the water imported to the pebble supporting layer (34) at the bottom of the tertiary sewage treatment A / O type bio-aeration filter flows from bottom to top, passes in turn through anoxybiotic section (35), aerobic section (36) and water-outlet section (37), arrives in disinfection contact tank (31) to disinfect and discharge acceptable water.

Description

Technical field: [0001] The invention mainly relates to a method for expanding the capacity of a sewage treatment plant by using an A / O type biological aeration filter, which can make the water quality of the expanded effluent reach the discharge standard stipulated by the state or the water quality standard for sewage recycling. Background technique: [0002] The meaning of urban sewage treatment plant expansion means that the treatment water volume of the existing urban sewage treatment plant has reached the original design water volume, but the water inflow is still increasing, the capacity of the existing treatment equipment can no longer meet the requirements, and technical transformation and expansion are needed ; or due to various reasons, the effluent quality of the existing urban sewage treatment plants cannot meet the required requirements, and it is necessary to carry out technical transformation on the existing treatment process or add some treatment equipment to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/02C02F3/28C02F3/30
CPCY02W10/10
Inventor 邱熔处王刚
Owner GANSU GOLDEN BRIDGE GRP CO LTD
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