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Synchronous denitrogen dephosphorus technology of city sewagte

A technology for simultaneous denitrification and dephosphorization and urban sewage, applied in the field of simultaneous denitrification and dephosphorization of urban sewage, it can solve the problems of long process, large investment, low phosphorus removal rate, etc. Effect

Inactive Publication Date: 2008-02-20
HUNAN UNIV
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies such as low nitrogen and phosphorus removal rate, long process, large investment, and difficult management in the existing urban sewage treatment process, and provide a new process for efficient and simultaneous denitrification and phosphorus removal of urban sewage. The reaction process is short, the process can save carbon sources, no sludge reflux is required, the power consumption is low, and the land occupation is small, the equipment investment is small, and the infrastructure investment and operation costs are about 50% and 30% of the traditional sewage treatment process; It has the advantages of strong impact load resistance, stable operation, and good treatment effect; this process can also be controlled by a program, with fewer control points, simple control, and convenient operation and management.

Method used

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  • Synchronous denitrogen dephosphorus technology of city sewagte

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Embodiment 1

[0019] Please refer to Figure 1. This process is used to treat domestic sewage in a residential area. The main structures and equipment include grilles, regulating tanks, sequencing batch composite bioreactors, disinfection contact tanks, aeration devices, disinfection and dosing devices, Program control device, sludge thickening tank, sludge dehydration device, water pump, aeration fan, corresponding valves, pipelines and other auxiliary equipment. Sewage water quality: chemical oxygen demand, 150-400mg / L, with an average of 285mg / L; suspended solids, 100-250mg / L, with an average of 180mg / L; total nitrogen, 26-50mg / L, with an average of 40mg / L ; Ammonia nitrogen, 20-38mg / L, with an average of 29mg / L; total phosphorus, 3-8mg / L, with an average of 4.5mg / L.

[0020] The specific implementation includes the following steps:

[0021] 1. Dosing of activated sludge and biofilm carrier. Dosing activated sludge and plastic multifaceted hollow spheres as biofilm carriers in the seque...

Embodiment 2

[0026] Please refer to Figure 1. This process has been applied to a laboratory pilot test to treat low-carbon source, high-concentration nitrogen and phosphorus sewage, and test the ability of this process to treat low-carbon source, high-concentration nitrogen and phosphorus sewage. The main structures and equipment of the test process include grilles, regulating tanks, sequencing batch composite bioreactors, disinfection contact tanks, aeration devices, disinfection and dosing devices, program control devices, sludge concentration tanks, sludge dehydration devices, and Water pumps, aeration fans and corresponding valves, pipelines and other ancillary equipment.

[0027] Low-carbon source, high-concentration nitrogen and phosphorus sewage is prepared by adding corresponding chemicals to domestic sewage. When the domestic sewage in the living quarters intercepts larger suspended solids and particulate matter in the sewage through the screen, according to the water quality test ...

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Abstract

A technology for synchronously removing N and P from the city sewage features that the composite suspended living things system with active sludge and biomembrane is created in a batch of composite bioreactors, which in running by the sequence of anaerobic, aerobic and anoxic steps. Its advantages are short reaction flow, less consumption of carbon source, high effect and low cost.

Description

technical field [0001] The invention relates to a process for synchronous denitrification and dephosphorization of urban sewage. Background technique [0002] The relationship between denitrification and phosphorus removal in sewage treatment is relatively complicated. It is generally believed that there are great differences in the physiological characteristics of nitrifying bacteria, denitrifying bacteria and phosphorus removing bacteria in terms of oxygen demand and generation cycle, and it is difficult to treat them in the same reactor. Realize efficient simultaneous removal of nitrogen and phosphorus. The latest denitrification and phosphorus removal processes are all developed based on the new approach of "denitrification and phosphorus removal" discovered after the re-understanding of the biological phosphorus uptake / release metabolism mechanism. The denitrifying phosphorus accumulating bacteria combine the process of phosphorus uptake and nitrogen removal, which not...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/12C02F3/30C02F3/10
CPCY02W10/10
Inventor 蒋剑虹曾光明张盼月郭杰尹疆
Owner HUNAN UNIV
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