Culture method of aerobic granular sludge for simultaneous denitrification and dephosphorization of domestic sewage at low and normal temperature

A technology for aerobic granular sludge, nitrogen and phosphorus removal, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. The sedimentation time reduces the area of ​​​​and other issues, so as to reduce the amount of carbon source added, simplify the process flow, and reduce the sludge output.

Active Publication Date: 2009-10-14
BEIJING DRAINAGE GRP CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a cultivation method and its fuzzy control device for treating domestic sewage at room temperature and low temperature while simultaneously denitrifying and dephosphorizing aerobic granular sludge, so as to increase the content of nitrifying bacteria and phosphorus accumulating bacteria, increase the volume load, and solve the problem of low C

Method used

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  • Culture method of aerobic granular sludge for simultaneous denitrification and dephosphorization of domestic sewage at low and normal temperature
  • Culture method of aerobic granular sludge for simultaneous denitrification and dephosphorization of domestic sewage at low and normal temperature
  • Culture method of aerobic granular sludge for simultaneous denitrification and dephosphorization of domestic sewage at low and normal temperature

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Embodiment 1

[0042] 1. Cultivation of aerobic granular sludge for treatment of domestic sewage at room temperature and simultaneous denitrification and phosphorus removal

[0043] Such as figure 1 As shown, the SBR reactor for simultaneous denitrification and phosphorus removal at room temperature and low temperature is cylindrical, with a diameter of 18 cm, an effective height of 55 cm, a height-to-diameter ratio of 3, and a total effective volume of 12 L. It is made of organic glass, and the drain pipe 6 is located under the reactor. / 2, the volume exchange rate is 50%. The sewage water temperature is not controlled. a city A 2 / O Process The remaining sludge discharged from the secondary sedimentation tank of the urban sewage treatment plant is loaded into the SBR reactor as seed sludge; the raw water is the actual domestic sewage discharged from a living quarter, and the average water quality: COD is 191.37mg / L, ammonia nitrogen ( NH 4 + -N) is 58.32mg / L, orthophosphate (PO 4 3-...

Embodiment 2

[0108] 1. Cultivation of aerobic granular sludge for treatment of domestic sewage at room temperature and simultaneous denitrification and phosphorus removal

[0109] Example 2 Cultivate the SBR reactor for denitrification and phosphorus removal at normal and low temperature at the same time as in Example 1. The SBR is cylindrical, with a diameter of 18 cm, an effective height of 55 cm, a height-to-diameter ratio of 3, and a total effective volume of 12 L. It is made of organic glass. The drain pipe 6 is located at the lower 1 / 2 of the reactor, and the volume exchange rate is 50%. The sewage water temperature is not controlled. a city A 2 / O Process The remaining sludge discharged from the secondary sedimentation tank of the urban sewage treatment plant is loaded into the SBR reactor as seed sludge; the raw water is the actual domestic sewage discharged from a living quarter, and the average water quality: COD Cr is 191.37mg / L, ammonia nitrogen (NH 4 + -N) is 58.32mg / L, or...

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Abstract

A culture method of aerobic granular sludge for simultaneous denitrification and dephosphorization of domestic sewage at low and normal temperature belongs to the sewage treatment field and is characterized in that: an SBR reactor adopts 2-10 ratio of height to diameter and 50-67 percent of volume exchange rate without regulation and control over water temperature. The precipitation time is 30-50min, and is reduced gradually to 1-3min; or the precipitation time is set as 5-8min, and is reduced gradually to 1-3min. In biochemical reaction process, dissolved oxygen concentration DO, oxidation-reduction potential ORP and pH value are taken as real-time control parameters to control stirring time in real time (denitrification, phosphorus release), aeration time (organic matter oxidation, nitration, denitrification, aerobic phosphorus absorption, denitrifying phosphorus absorption). The method can improve the content of nitrobacteria and phosphate accumulating organisms, realizes the simultaneous denitrification and dephosphorization of low-COD domestic sewage at low and normal temperature through the aerobic granular sludge in anaerobic/aerobic manner, is simple in process, low in sludge yield, high in reaction efficiency, good in sludge precipitation performance and small in the area occupied by the reactor, and solves the problems of low operation efficiency and unstable treatment of nitrogen and phosphorus caused by time programmed control of a sewage treatment system.

Description

technical field [0001] The invention relates to a sewage treatment process and its control device and method, in particular to an aerobic granular sludge process for treating low COD / N / P actual domestic sewage at room temperature and simultaneously denitrification and phosphorus removal process and its intelligent control device and method . Background technique [0002] With the vigorous development of my country's sewage treatment industry, the country's requirements for sewage discharge are becoming more and more stringent. However, the problem of eutrophication caused by nitrogen and phosphorus pollution has not only not been solved, but has become increasingly serious. In 2002, my country's newly promulgated "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) requires that all urban sewage treatment plant effluents be discharged into rivers with small dilution capacity as urban landscape water and general reuse water, etc., Implement the A s...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 高景峰陈冉妮彭永臻苏凯张倩
Owner BEIJING DRAINAGE GRP CO LTD
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