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A constant rheological load svbr sewage treatment process

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

Active Publication Date: 2016-08-24
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 realizes the rational combination or combination of various functional units. Complete all 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 technology Large investment, high operating cost, poor treatment effect and complex automatic control caused by sewage treatment in small towns

Method used

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  • A constant rheological load svbr sewage treatment process
  • A constant rheological load svbr sewage treatment process
  • A constant rheological load svbr sewage treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0086] Use as figure 1 —3 shows a constant flow load SVBR sewage treatment process and device to treat a small town 1000m 3 / d of domestic sewage.

[0087] Designed water quality:

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

[0089] Effluent water quality requirements: meet the first level B standard in the "Emission Standard for Pollutants for Urban Wastewater Treatment Plants" (GB18918-2002).

[0090] The relevant design parameters are as follows: The average influent flow rate 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, one floating decanter is set for 20, and the total designed drainage capacity is 41.7×1.2=50m 3 / h; the effective volume of the inlet and sludge return well 1 is 25m 3 , The maximum sludge load is 0.10kgBOD 5 / kgMLSS.d, the total auxiliary return sludge volume is 50% of the average influent flow; the surface hydraulic load of the anaerobic and primary sedimen...

Embodiment 2

[0095] Use as Figure 1-3 A SVBR sewage treatment process and device with a constant output rheological load shown to treat 500m in a living area 3 / d of 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 level B standard in the "Emission Standard of Pollutants for Urban Sewage Treatment Plants" (GB18918-2002).

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

Embodiment 3

[0103] Use as Figure 1-3 A SVBR sewage treatment process and device with a constant output rheological load shown to treat 3000m in a small town 3 / d 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 "Emission Standard of Pollutants for Urban Wastewater Treatment Plants" (GB18918-2002).

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

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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 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 statistical bulletin of the Ministry of Construction in 2007, as of the end of 2006, there were 35,764 towns in the country, of which 19,369 were organized towns. With the rapid development of the urban economy and the increase in population, the amount of sewage discharge 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 infrastructure construction of small towns lags far behind the development of urban construction. Currently, more than 95% of small towns have not established sewage treatment plants, and the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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