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Pre-acidification anaerobic UASB treatment device and method for sewage

A treatment device and acidification treatment technology, which is applied in anaerobic digestion treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Due to the limited improvement capacity, the effect of simple operation process, increased volume load, and improved anaerobic COD removal rate can be achieved.

Inactive Publication Date: 2013-10-16
ZHEJIANG YISHENG PETROCHEM
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Problems solved by technology

Ordinary regulating tanks are relatively simple in structure, generally without special structures, and have limited ability to improve the biodegradability of sewage. The anaerobic COD removal rate of sewage after entering the UASB reactor after being treated in general regulating tanks can only be at 20 % to 80%, the removal rate is not high, and often fails to meet the emission standards

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  • Pre-acidification anaerobic UASB treatment device and method for sewage

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Embodiment 1

[0024] The specific operation steps are as follows:

[0025] (a) Spread a certain amount of concentrated sludge 3 on the bottom of the regulating tank 2, and then add a certain amount of nutrient salt to the concentrated sludge 3. The concentration of the concentrated sludge 3 is controlled at 2500 mg / L, and the nutrient salt C:N:P=150:3:1;

[0026] (b) After the domestication of the acidifying bacteria in the concentrated sludge 3 is completed, the sewage is injected into the regulating tank 2 through the water inlet pipe 1;

[0027] (c) Start the agitator 21 on both sides to agitate the sewage to speed up the acidification process of the sewage. The rotation speed of the agitator 21 is 25 rpm, and the gas collecting hood 22 collects the biogas generated;

[0028] (d) When the water level of the sewage reaches the position of the overflow pipe 4, the acidified sewage enters the UASB reaction tank 5 through the overflow pipe 4 for the next step of treatment, ensuring that the...

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Abstract

The invention relates to a pre-acidification anaerobic UASB (up-flow anaerobic sludge blanket) treatment device and method for sewage. The device comprises a regulation pool and a UASB reaction tank. A water inlet pipe is connected to the left side of the regulation pool, the bottom of which is provided with a layer of concentrated sludge. Sewage is injected into the regulation pool over the concentrated sludge through the water inlet pipe. Stirrers are symmetrically installed on two side walls in the regulation pool. The right side of the regulation pool is communicated with the UASB reaction tank through an overflow pipe. After pre-acidification treatment of the sewage in the regulation pool by acidification bacteria in the sludge, the sewage then enters the UASB reaction tank. The structure of the device is simple, and the operation process is simple. Transformation is carried out on the existing regulation pool, in which acidification bacteria are domesticated to improve the biodegradability of wastewater. The discharged water is led into the UASB reaction tank to improve the volume loading of UASB, and the anaerobic COD (chemical oxygen demand) removal rate can be effectively improved by 5%-10%.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a sewage pre-acidification anaerobic UASB treatment device and method. Background technique [0002] The Up Flow Anaerobic Sludge Blanket (UASB) process was successfully developed by Lettinga et al. from Wageningen Agricultural University in the Netherlands during 1973-1977. At present, the UASB process in Europe has generally formed granular sludge, which makes the anaerobic USAB process rapidly promoted and popularized in Europe. Our country started the research work of UASB reactor in 1981, and this technology has been popularized and applied in our country actually. UASB reactor is currently the most widely used high-speed anaerobic reactor, and this technology has developed into one of the mainstream technologies for anaerobic treatment at home and abroad. [0003] In the UASB sewage treatment process, before the sewage enters the UASB reactor, it will first pass through th...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F3/34
CPCY02E50/30
Inventor 陈国斌
Owner ZHEJIANG YISHENG PETROCHEM
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