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Constant-effluent variable-load SVBR sewage processing technology

A sewage treatment and process technology, applied in the direction of aerobic and anaerobic process treatment, can solve the problems of complex automatic control, high operating cost, poor treatment effect, etc., to simplify the process and structure, avoid secondary upgrading, improve The effect of volume utilization

Active Publication Date: 2014-07-23
SDIC XINKAI WATER ENVIRONMENT INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a constant rheological load SVBR (Steady outflow Variable load Biological Reactor) sewage treatment process, which utilizes the efficient integration of various existing sewage treatment processes and technologies, and through the rational combination or combination of various functional units, To realize all the necessary processes of sewage treatment in a reactor with a simple structure, the purpose is to provide a high-efficiency, energy-saving, economical and simple process and device suitable for small town sewage treatment to solve the existing process and Large investment, high operating cost, poor treatment effect and complex automatic control brought about by the technology used in small town sewage treatment

Method used

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  • Constant-effluent variable-load SVBR sewage processing technology
  • Constant-effluent variable-load SVBR sewage processing technology
  • Constant-effluent variable-load SVBR sewage processing technology

Examples

Experimental program
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Effect test

Embodiment 1

[0086] use as figure 1 A constant rheological load SVBR sewage treatment process and device shown in -3 to treat a small town of 1000m 3 / d domestic sewage.

[0087] Design water quality:

[0088] COD cr 300mg / L; NH 3 -N30mg / L; TP4mg / L; SS180mg / L

[0089] Requirements for effluent water quality: meet the first-class B standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

[0090] The relevant design parameters are as follows: the average flow rate of influent water is 41.7m 3 / h; maximum flow rate 85.9m 3 / h; the designed daily continuous drainage time is 20h, the drainage safety factor is 24 / 20=1.2, and one floating decanter is set at 20, the total design drainage capacity is 41.7×1.2=50m 3 / h; the effective volume of water inlet and sludge return well 1 is 25m 3 , the maximum sludge load 0.10kgBOD 5 / kgMLSS.d, the total amount of auxiliary return sludge is 50% of the average influent flow rate; the surface hydraulic load o...

Embodiment 2

[0095] use as Figure 1-3 A constant rheological load SVBR sewage treatment process and device shown to treat a 500m 3 / d domestic sewage.

[0096] Design water quality: COD cr 350mg / L; NH 3 -N40mg / L; TP4mg / L; SS200mg / L

[0097] The effluent water quality is required to meet the first-class B standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

[0098] The relevant design parameters are as follows: the average flow rate of influent water is 20.8m 3 / h; maximum flow 46.4m 3 / h; design continuous drainage time of 20h per day, drainage safety factor 24 / 20=1.2, set 1 floating decanter 20, design total drainage capacity 20.8×1.2=25m 3 / h; the effective volume of water inlet and sludge return well 1 is 15m 3 , the maximum sludge load 0.10kgBOD 5 / kgMLSS.d, the total amount of auxiliary return sludge is 50% of the average influent flow rate; the surface hydraulic load of anaerobic and primary sedimentation zone 2 is 3.0m 3 / m 2 ...

Embodiment 3

[0103] use as Figure 1-3 A constant rheological load SVBR sewage treatment process and device shown in a small town of 3000m 3 / d's comprehensive sewage.

[0104] Design scale: 3000m 3 / d.

[0105] Design water quality: COD cr 350mg / L; NH 3 -N40mg / L; TP5mg / L; SS200mg / L.

[0106] The effluent water quality is required to meet the secondary standard in the Discharge Standard of Pollutants for Urban Sewage Treatment Plants (GB18918-2002).

[0107] The relevant design parameters are as follows: the average flow rate of influent water is 125m 3 / h; maximum flow 229m 3 / h; the designed daily continuous drainage time is 22h, the drainage safety factor is 24 / 22=1.1, and the design drainage capacity of the decanter is 125×1.1=137.5m 3 / h; the effective volume of water inlet and sludge return well 1 is 65m 3 , the maximum sludge load 0.12kgBOD 5 / kgMLSS.d, the total amount of auxiliary return sludge is 20% of the average influent flow rate; the surface hydraulic load of anaer...

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Abstract

The invention relates to a constant-effluent variable-load SVBR sewage processing technology. The technology comprises the following steps: introducing sewage into an inflow and sludge reflux well, primarily processing the sewage by a grating, then mixing the sewage with reflux sludge, transporting the sewage to an anaerobic and primary sedimentation zone by a lifting pump, then processing the sewage in an AO biological processing area, further purifying the sewage and carrying out primary sludge-water separation in an anoxic and pre-sedimentation zone, finally carrying out final sludge-water separation in a secondary sedimentation and effluent zone, disinfecting the effluent by a tube-type ultraviolet disinfector, and discharging the disinfected effluent out of the system. Through the optimized combination of various functional zones and the circulating reflux design, the sewage processing technology allows the inflow rate and the water level and load in the reactor to change within a designed range, the effluent rate of the system always remains relatively constant and continuous, and the processing process is a continuous non-stable process. The sewage processing technology integrates the functions of lifting, modulating, primary settlement, biological degradation, secondary settlement, and sludge reflux in one tank, has the characteristics of little occupied area and equipment, and simpleness in operation and management, and is especially applicable to the sewage treatment in small towns.

Description

technical field [0001] The invention relates to a constant outflow rheological load SVBR (Steady outflow Variable load Biological Reactor) sewage treatment process, which belongs to the technical field of sewage treatment. Background technique [0002] At present, my country is in a period of rapid urbanization. According to the 2007 Statistical Bulletin of the Ministry of Construction, by the end of 2006, there were 35,764 towns and towns in the country, including 19,369 official towns. With the rapid development of urban economy and the increase of population, the discharge of sewage in cities and towns continues to increase. At present, the daily discharge of sewage in small towns has reached about 200 million tons, accounting for about 70% of the total domestic sewage discharge in the country. However, the construction of infrastructure in small towns lags far behind the development of urban construction. At present, more than 95% of small towns have not yet established...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 叶方清宋乐平张大鹏陈东李晖叶艳华
Owner SDIC XINKAI WATER ENVIRONMENT INVESTMENT CO LTD
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