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High-efficiency and low-energy-consumption novel sewage deep denitrification technology and system thereof

A technology of deep denitrification and low energy consumption, applied in the field of water treatment, can solve the problems of not taking advantage of the MABR process, and achieve the effect of improving oxygen utilization rate, occupying a small area and reducing operating costs.

Inactive Publication Date: 2020-05-15
ZHEJIANG ENMAT BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention simply connects the A / O process and the MABR process in series, and does not give full play to the greatest advantages of the MABR process, namely high efficiency, energy saving and synchronous nitrification and denitrification.

Method used

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  • High-efficiency and low-energy-consumption novel sewage deep denitrification technology and system thereof
  • High-efficiency and low-energy-consumption novel sewage deep denitrification technology and system thereof
  • High-efficiency and low-energy-consumption novel sewage deep denitrification technology and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1: MABR+A 1 +A 2 Combination process

[0055] according to Figure 4 The shown process flow chart establishes a MABR+A with a processing capacity of 50L / day 1 +A 2 Processing system, the parameters of the system are as follows:

[0056] The bubble-free aeration membrane module is installed in the MABR tank, compressed air is used as the oxygen supply source, and nitrogen is used as the scrubbing gas; the height of the solid-phase carbon source filler is uniformly 25cm, and the height of the inert filler is uniformly 40cm; MABR tank, solid-phase carbon source denitrification reaction Pool A 1 , Inert packing denitrification reaction pool A 2 The hydraulic retention time of 10 hours, 15 minutes and 60 minutes respectively; denitrification reaction tank A 1 and A 2 Dissolved oxygen is controlled at 0.2-0.4mg / L; the whole process has no reflux of nitrification liquid and no sludge reflux.

[0057] Take the sludge from the sewage treatment plant and treat th...

Embodiment 1-1

[0060] The MABR tank is equipped with Zeelung bubble-free aeration membrane modules provided by Suez Water Technology (Shanghai) Co., Ltd.; denitrification reaction tank A 1 Filled with poly-3-hydroxybutyrate-valerate (PHBV) cylindrical particles (molecular weight: 360,000) produced by Ningbo Tianan Biomaterials Co., Ltd., with an average length of 4.0 mm and an average diameter of 2.5 mm; denitrification reaction tank A 2 Fill with purchased soft packing. According to the operating conditions described in Example 1, the film-hanging and water inflow were carried out to form a dense bacterial film and obtain stable COD and TN treatment effects.

Embodiment 1-2

[0062] The MABR tank is equipped with Zeelung bubble-free aeration membrane modules provided by Suez Water Technology (Shanghai) Co., Ltd.; denitrification reaction tank A 1 Fill the composite pellets of PHBV and PBS, the specific processing method is: measure 0.5 kg PHBV and 4.5 kg PBS and mix them evenly in a high mixer, add to the feed hopper of the conical twin-screw granulator, conical twin-screw granulation The temperature settings of the five zones of the machine are 90°C, 120°C, 150°C, 175°C, and 165°C respectively, and the dry pellets are made by a ring granulator and an air cooling machine; the denitrification reaction pool A 2 Fill with purchased fiber elastic filler.

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Abstract

The invention relates to a high-efficiency and low-energy-consumption novel sewage deep denitrification technology and a system thereof. A solid-phase carbon source denitrification tank and an inert filler denitrification tank are added behind an MABR process in a coupling manner to form an MABR + A1 + A2 combined process; or a mixed filler denitrification tank is added behind the MABR process ina coupling manner to form an MABR + A combined process. Compared with an existing A / O process, the technology disclosed by the invention has the characteristics of high treatment efficiency, small total occupied area, low total energy consumption, strong load impact resistance, no need of frequent maintenance, low operation and maintenance cost and the like when being used for treating the same water quantity, so that the control process is greatly simplified, and the operation cost is reduced. Various kinds of biochemical wastewater can be efficiently treated through the synergistic effect ofthe MABR process and the denitrification reaction tank, the COD and TN of discharged water can be effectively and stably maintained to be lower than 40 mg / L and 10 mg / L respectively, and the highestdomestic standard requirements at present are met.

Description

Technical field [0001] The invention belongs to the field of water treatment technology, and specifically relates to a new process for deep denitrification of sewage with high efficiency and low energy consumption and its system. Specifically, a solid-phase carbon source denitrification reaction tank is added after the MABR (membrane aeration bioreactor) process. (A 1 tank) and inert packing denitrification tank (A 2 pool), forming MABR+A 1 +A 2 Combined process; or add a mixed filler denitrification tank after the MABR process to form a MABR+A combined process. Background technique [0002] Among the mainstream processes of existing urban sewage treatment plants in my country, the AAO sewage treatment process is the most commonly used method. It is mainly composed of anaerobic zone, anoxic zone and aerobic zone, and has the effect of simultaneous nitrogen and phosphorus removal. Typical AAO process flow ( figure 1 ) as follows: sewage and return sludge enter the anaero...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/30
Inventor 文鹏徐佳雄李瑞瑞何其昌赵欣园朱世扬王刚陈学军
Owner ZHEJIANG ENMAT BIOLOGICAL TECH CO LTD
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