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Efficient bicirculating anaerobic reactor

An anaerobic reactor and double-circulation technology, applied in the field of water treatment, can solve the problems of hindering the mass transfer efficiency of anaerobic reactor sludge, reducing the reactor treatment efficiency, and slowing down the metabolism of anaerobic microorganisms, so as to solve the problem of water discharge zone Mud phenomenon, improve the biochemical properties of influent, promote the effect of granulation

Pending Publication Date: 2018-02-23
北京北控工业环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual use, there is a long time to domesticate granular sludge, and the start-up time is long
Uneven distribution of influent water, short flow phenomenon occurs in the sludge bed, and a large number of dead angles appear in the reaction zone
This will hinder the sludge mass transfer efficiency in the anaerobic reactor, resulting in the slowdown of the anaerobic microbial metabolism in the reactor, thereby reducing the treatment efficiency of the reactor

Method used

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Experimental program
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Embodiment 1

[0028] refer to figure 1 As shown, the application of the high-efficiency double-cycle anaerobic reactor in this embodiment in the treatment of coal chemical industry wastewater is carried out as follows: 1. Through the water inlet pump, the coal chemical industry wastewater is pumped into the reactor 1 through the water inlet, and pumped into the reactor 1. Add hydrolytic acidifying bacteria, acid-producing bacteria, and hydrogen-producing methanogenic bacteria within 1 hour, the COD of the influent is 2500-3500 mg / L, and the B / C ratio is below 0.1. Control the temperature of the influent water at 30-37°C, the pH of the influent water at 7.5-8.5, and the residence time at 20h.

[0029] 2. The water outlet from the primary circulation system 5 at the top of the reactor 1 enters the buffer tank 52 of the primary circulation system through the pipeline 51, and the water outlet passes through the primary circulation pump 53, wherein the treated water flows back to the water inlet...

Embodiment 2

[0034] The difference between this embodiment and method 1 is that the strains added to the reactor are cultured with sludge from the anaerobic section of wastewater treatment in other chemical industries, the influent COD is 3500-4000 mg / L, and the B / C ratio is below 0.1. The temperature of the influent water is 27-35°C, the pH of the influent water is controlled at 7.0-7.5, and the residence time is 30 hours. Other conditions and processing procedures are the same as in Case 1.

[0035]Compared with the existing reactor, through two independent circulation systems, the anaerobic reactor can improve the treatment capacity of the industrial wastewater which is difficult to biochemically treat. Among them, the first-stage circulation system 5 can not only increase the rising flow rate in the reactor, but also adjust the biodegradability of the influent, and improve the load shock resistance of the anaerobic reactor. The secondary circulation system 8 is not affected by the inf...

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Abstract

The invention relates to an efficient bicirculating anaerobic reactor. The bicirculating anaerobic reactor comprises an anaerobic reactor body. A gas collector communicated with an inner cavity of theanaerobic reactor body is arranged at the top of the anaerobic reactor body, and is provided with a gas exhaust pipe. A separator is arranged in the anaerobic reactor body. A primary circulating system is connected to a position, located above the separator, on the anaerobic reactor body. A sludge collector is arranged at a position, located below the separator, in the anaerobic reactor body. A reaction region is arranged at the bottom of the anaerobic reactor body. A sludge distribution system is arranged in the reaction region, and is connected with the sludge collector through a secondarycirculating system. The primary circulating system of the anaerobic reactor can effectively improve anti-impact resistance of the anaerobic reactor and biochemistry of inlet water. The secondary circulating system cooperates with the sludge collector and the sludge distribution system, so that the phenomenon that outlet water of the anaerobic reactor carries sludge can be solved effectively, lifting speed of anaerobic sludge can be increased, and activity of the anaerobic sludge can be stimulated.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a high-efficiency anaerobic reactor with a double circulation system suitable for industrial refractory wastewater. Background technique [0002] With the rapid development of society and industry in our country, the wastewater produced not only endangers the environment, but also hinders the development of the industry. Among them, most of the wastewater discharged from chemical industry and other industries is high-concentration organic wastewater. It is difficult to achieve the purpose of treatment by conventional physicochemical and biochemical treatment. At the same time, there are a series of problems such as operation management, large investment, and high operating cost. In order to improve the removal efficiency of such wastewater, various forms of anaerobic reactors have been invented. However, in actual use, the time for acclimating granular sludge is longer, and the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCC02F3/2866
Inventor 高放王志国马林邢林林刘洋
Owner 北京北控工业环境科技有限公司
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