A method for large-scale production and application of anaerobic granular sludge

An anaerobic granular sludge and granular sludge technology, which is applied in the direction of anaerobic digestion and treatment, can solve the problems of synchronously realizing the improvement of methane production efficiency and the difficulty of large-scale cultivation of anaerobic granular sludge, so as to achieve methane production efficiency, The effect of promoting the improvement of methane production efficiency and high activity

Active Publication Date: 2021-03-30
NANJING UNIV +1
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Problems solved by technology

[0008] Aiming at the problems in the prior art that it is difficult to simultaneously realize the improvement of methane production efficiency and the large-scale cultivation of anaerobic granular sludge, the present invention sets up two anaerobic reactors in one system, and utilizes the first anaerobic reactor as the main The function is to produce methane, and the main function of the second anaerobic reactor is to produce anaerobic granular sludge. By adjusting the ratio of influent water between the first anaerobic reactor and the second anaerobic reactor, the conversion between the two functions in the system is realized. , not only can realize the production and storage of granular sludge in the anaerobic reaction system, but can also simultaneously realize the improvement of methane production efficiency, and can also realize the adjustment or switching between the two functions according to market / project needs

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  • A method for large-scale production and application of anaerobic granular sludge
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  • A method for large-scale production and application of anaerobic granular sludge

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Embodiment 1

[0038] In this example, two anaerobic reactors (UASB small test device) are used to process high-concentration organic wastewater, and the treatment scale is 0.2m 3 / h, the effective volume of the reactor is 4m 3 , the COD concentration of the reactor influent is 20000mg / L, the pH value is 6.5, the sludge load is 0.8kgCOD / kgVSS·d, the rising flow rate is 2m / h, the temperature in the reactor is 38±2℃, and the two anaerobic reactors have Mature anaerobic granular sludge A is formed, and the volume of granular sludge is 1.0m 3 ; The effluent COD concentration of the two anaerobic reactors before treatment is 10000-14000mg / L, the average COD removal rate is 75%, and the effluent pH value is 6.8.

[0039] Use the above two reactors to form a wastewater treatment system, such as figure 1 As shown, the system includes an influent separator 1, a first anaerobic reactor 5, a second anaerobic reactor 10, a first intermediate tank 2, a second intermediate tank 7, a first inlet pump 3 a...

Embodiment 2

[0056] Aiming at the treatment of high-concentration organic wastewater in a pharmaceutical company, the existing pilot plant has a treatment scale of 2m 3 / h, the anaerobic system consists of two UASB reactors, and the effective volume of a single anaerobic reactor is 6m 3 , the system has been running continuously and stably for one year, and mature anaerobic granular sludge A has been formed in both reactors. The influent COD concentration of the existing two anaerobic reactor systems is 16000-20000 mg / L, the effluent COD concentration is 7500-9000 mg / L, and the effluent pH value is 7.2-7.8.

[0057] Above-mentioned reactor is formed anaerobic system according to the mode of embodiment 1, takes the following steps to process:

[0058] (1) Control the rising speed of the water flow in the second anaerobic reactor 10 to 5-8m / h, and disintegrate the mature granular sludge A in the second anaerobic reactor through closed circulation for 5-10 hours, and add 0.3-0.5 mg / L cation...

Embodiment 3

[0068] The high-concentration organic wastewater produced by a Chinese medicine production enterprise adopts the technical solution provided by the present invention. The anaerobic system is composed of two UASB reactors, and the effective volume of a single anaerobic reactor is 300m 3 , the wastewater treatment capacity is 10m 3 / h, the COD concentration of wastewater is 12000mg / L, and the pH value is 6.2.

[0069] Above-mentioned reactor is formed anaerobic system according to the mode of embodiment 1, takes the following steps to process:

[0070] (1) Control the rising speed of the water flow in the second anaerobic reactor 10 to be 5-8m / h, and disintegrate the mature granular sludge A in the second anaerobic reactor 10 through closed circulation for 5-10h, and add 0.3-8m / h Cationic polyacrylamide of 0.5 mg / L and composite conductive medium with effective volume of 0.05% to 1% of the reactor are added for 10 to 30 minutes to prepare sclerotium; the preparation method and ...

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Abstract

The invention belongs to the field of wastewater treatment, and discloses a method for large-scale production and application of anaerobic granular sludge. Two anaerobic reactors are arranged, the first anaerobic reactor is mainly used for undertaking anaerobic biochemical treatment and methane production functions, and mainly methane production; and the second anaerobic reactor is mainly used forproducing and storing anaerobic granular sludge. According to the method disclosed by the invention, the mature granular sludge of the second anaerobic reactor is disintegrated and reconstructed to promote the improvement of the yield and the activity of anaerobic particles, and the water inlet quantity of the first anaerobic reactor and the water inlet quantity of the second anaerobic reactor are adjusted to realize switching among main functions. According to the method, large-scale production and storage of the granular sludge in the anaerobic reaction system can be achieved, the methane production efficiency and the wastewater treatment efficiency of the system can be synchronously improved, and the function of adjusting the granular sludge proliferation and the methane production amount of the reactor can be achieved according to market / project requirements.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a method for large-scale production and application of anaerobic granular sludge. Background technique [0002] In the anaerobic biochemical treatment of high-concentration organic wastewater, common anaerobic reactors such as UASB and IC, the mature anaerobic granular sludge in the reactor has good settling performance and high specific methane production activity, which is conducive to the removal of pollutants in wastewater Effect. The formation of anaerobic granular sludge shortens the distance between microbial cells and improves the mass transfer efficiency between different types of microbial cells, which is beneficial to the degradation and removal of pollutants in wastewater. [0003] However, the cultivation period of fresh anaerobic granular sludge is longer, and the cultivation process is greatly affected by external conditions, resulting in a longer s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
CPCC02F3/28
Inventor 张炜铭牛志华汪林吕振华花铭
Owner NANJING UNIV
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