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Apparatus for stably maintaining sludge micro-bulking for saving energy in biological denitrification technology and method thereof

A biological denitrification and micro-expansion technology, which is applied in chemical instruments and methods, biological water/sewage treatment, sustainable biological treatment, etc., can solve the problems of high energy consumption in aeration operation and the inability to prevent malignant sludge expansion, etc., to achieve Saving aeration energy consumption, achieving balanced growth, and stably maintaining the effect of sludge micro-expansion

Active Publication Date: 2010-06-30
彭永臻
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this sewage treatment process usually needs to use a large amount of aeration in the aerobic zone to improve the nitrification efficiency and prevent sludge bulking, which has the disadvantages of being unable to prevent the occurrence of malignant sludge bulking, and the aeration operation consumes a lot of energy.

Method used

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  • Apparatus for stably maintaining sludge micro-bulking for saving energy in biological denitrification technology and method thereof
  • Apparatus for stably maintaining sludge micro-bulking for saving energy in biological denitrification technology and method thereof
  • Apparatus for stably maintaining sludge micro-bulking for saving energy in biological denitrification technology and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one sees figure 1 As shown, a biological denitrification process stably maintains the sludge micro-expansion device to realize energy saving. According to the order from the raw water inlet to the clean water outlet, the water inlet tank 1, the reactor 13 and the secondary sedimentation tank 16 are arranged in sequence. The water inlet tank 1 is connected to the reactor 13 through the peristaltic pump 2, the water inlet pipe 20 and the valve 3, the outlet hole 18 on the reactor 13 is connected to the secondary sedimentation tank 16 through the clean water pipeline 19 and the valve, and the middle part of the reactor 13 is connected to the nitrifying liquid pipeline through the return flow 9. The second peristaltic pump 24 and the valve are connected to the anoxic compartment 14. The separator 8 is set in the secondary settling tank 16. The water inlet pipe of the secondary settling tank is in the center, and the water outlet weir 26 overflows around the periph...

Embodiment 1

[0029] The A / O process is used to treat campus domestic sewage. The mixed liquid suspended solids concentration (MLSS) in the aeration tank is maintained between 2500~3500mg / L, the average temperature of the reactor is 25°C, the internal circulation ratio is 150%, and the sludge reflux is 100%. . The volume ratio between the anoxic zone and the aerobic zone is 1:5, and the load is changed by changing the influent flow rate. At the beginning of each load, high dissolved oxygen is used to stabilize the operation, and then the aeration volume of each compartment in the aerobic zone is adjusted to Maintain the average DO in the reactor at various levels. After summarizing the test data, it is found that the relationship between the optimal dissolved oxygen and the sludge load is required to achieve an ammonia nitrogen removal rate of more than 70% and maintain an SVI between 150 and 250mL / g under different influent load conditions. attached figure 2 shown. High loads correspon...

Embodiment 2

[0030] Embodiment two see image 3 As shown, it shows the effect diagram of sludge micro-expansion maintenance under different loads and optimized DO. Under optimized DO conditions, the changes of SVI and filamentous bacteria index (FI) in the system when the sludge micro-expansion state is stably maintained curve. A device that can stably maintain the micro-expansion of sludge in sewage treatment to achieve energy saving (such as figure 1 shown) to maintain sludge micro-expansion at the optimized DO concentration. The raw water is campus domestic sewage. The concentration of mixed liquid suspended solids (MLSS) in the aeration tank is maintained at 2500~3500mg / L. The average temperature of the reactor is 25°C, the internal circulation ratio is 150%, and the sludge return ratio is 100%. The volume ratio of the anoxic zone and the aerobic zone is 1:5, and the load is changed by changing the influent flow rate. During the test, the treated water volume is 170~320L / d.

[0031]...

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Abstract

The invention provides an apparatus for stably maintaining sludge micro-bulking for saving energy in biological denitrification technique, which is provided with a water inlet tank, a reactor, and a secondary sedimentation tank sequentially, the water inlet end of the reactor is provided with an anaerobic cellular chamber, the anoxia cellular chamber is provided with a stirrer inside, an aerobic cellular chamber or a passage is arranged behind the anoxia cellular chamber, the aerobic lattice chamber or the passage is provided with a dissolved oxygen probe and an aeration head, and each dissolved oxygen probe is connected to a PID control system, each aeration head is connected to an air compressor through an air-flow meter, each control switch is connected to the PID control system. By adopting reasonable regulating technology operation parameters, particularly, the technology is controlled to be carried out under the conditions of proper sludge burden and dissolved oxygen concentration, the invention improves inter-species balance between filamentous fungi and zoogloea bacterium, and controls the sludge bulking within a certain extent and avoids malignant sludge bulking, thereby stably maintaining sludge micro-bulking. The invention solves the technical problem of how to stably maintain sludge micro-bulking in sewage treatment, and saves aeration energy consumption and achieves sewage water high-efficiency treatment purpose while ensuring the process effect.

Description

technical field [0001] The invention relates to a sewage biological denitrification energy-saving treatment device and method, in particular to a method for stably maintaining sludge expansion in the pre-denitrification biological denitrification sewage treatment process to realize sewage energy-saving treatment. Background technique [0002] Pre-denitrification biological denitrification process is one of the most widely used sewage treatment processes in urban sewage plants in my country. This process is also known as A / O (Anoxic / Oxic) biological denitrification process, which is a well-known sewage denitrification craft. This process has the characteristics of simple process flow because it can use carbon-containing organic matter in the influent as the denitrification carbon source under anoxic conditions. However, this sewage treatment process usually needs to use a large amount of aeration in the aerobic zone to improve the nitrification efficiency and prevent sludge b...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F3/12
CPCY02W10/10
Inventor 彭永臻郭建华黄惠珺刘洋马宁平王淑莹
Owner 彭永臻
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