Method and device for cultivating anaerobic granular sludge

An anaerobic granular sludge and cultivation device technology, which is applied in the field of anaerobic granular sludge cultivation method and its device, can solve the problems of high technical requirements, limitation of anaerobic granular sludge biological strain types, inconvenient operation, etc. Achieve the effect of high culture efficiency, short culture period and easy operation

Inactive Publication Date: 2013-04-17
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology

China Invention Publication (Announcement) No.: CN1887737A discloses "a rapid cultivation method of anaerobic granular sludge", which can accelerate the accumulation of Methanosarcina and rapidly form anaerobic bacteria by adding polyquaternium salt to anaerobic reactors. Granular sludge, the disadvantage of this method is that it is necessary to add a flocculant that is difficult to anaerobic biodegradation to the anaerobic reactor, which limits the type of biological bacteria in the anaerobic granular sludge, and the technical requirements are high, which is not convenient operate

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  • Method and device for cultivating anaerobic granular sludge

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Embodiment 1

[0025] Such as figure 1 As shown, the internal volume of the body 7 of the anaerobic granular sludge cultivation device of the present invention is 200 L, and the volume of inoculated sludge added to the body 7 is 10 L, and high-concentration pig-raising wastewater is transported at the bottom of the body 7, and the initial volume of the pig-raising wastewater is measured. The COD value is 3000mg / L, the temperature inside the body 7 is 35°C, the pH value is 7.0, and the alkalinity of the influent water is 1000mg / L. In the initial stage of anaerobic granular sludge cultivation, the inoculated sludge was statically domesticated. During the domestication process, the hydraulic retention time was set to 20h. On the 11th day of domestication, the COD value of the effluent at the sampling port of the body 7 was measured. When the COD removal rate of the effluent of the body 7 reached 80% , the sludge domestication stage ends; the anaerobic granular sludge formation stage increases t...

Embodiment 2

[0028] Such as figure 1 As shown, the internal volume of the body 7 of the anaerobic granular sludge cultivation device of the present invention is 200 L, and the volume of inoculated sludge added to the body 7 is 10 L, and high-concentration pig-raising wastewater is transported at the bottom of the body 7, and the initial volume of the pig-raising wastewater is measured. The COD value is 4000mg / L, the temperature inside the main body 7 is 35°C, the pH value is 7.0, and the alkalinity of the influent water is 1000mg / L. In the initial stage of anaerobic granular sludge cultivation, the inoculated sludge was statically domesticated. During the domestication process, the hydraulic retention time was set to 24h. On the 12th day of domestication, the COD value of the effluent at the sampling port of the body 7 was measured. When the COD removal rate of the effluent of the body 7 reached 85% , the sludge acclimatization stage ended; the anaerobic granular sludge formation stage inc...

Embodiment 3

[0031] Such as figure 1 As shown, the volume of the body 7 of the anaerobic granular sludge cultivation device of the present invention is 200L, and the volume of inoculated sludge added to the body 7 is 10L, and the high-concentration pig-raising wastewater is transported at the bottom of the body 7, and the initial pig-raising wastewater is measured. The COD value is 5000mg / L, the temperature inside the main body 7 is 35°C, the pH value is 7.0, and the alkalinity of the influent water is 1000mg / L. In the initial stage of anaerobic granular sludge cultivation, the inoculated sludge was statically domesticated. During the domestication process, the hydraulic retention time was set to 25h. On the 15th day of domestication, the COD value of the effluent of the anaerobic body 7 sampling port was measured. When the COD removal rate of the effluent of the body 7 reached 90 %, the sludge domestication stage ends; the anaerobic granular sludge formation stage increases the hydraulic ...

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Abstract

The invention discloses a device for cultivating anaerobic granular sludge. The device is characterized in that an artificial sludge bed is arranged inside a body and is formed in a manner that a packing support pipe is fixed between an upper support plate and a lower support plate in a penetrating manner; the upper support plate and the lower support plate are fixed together with the body through a lower fixing frame; radial packings are evenly distributed on the pipe wall of the packing support pipe; a plurality of paths of inlet water distributors are arranged at the bottom part of the body and are connected with a water inlet pump; a water outlet pipe is arranged at the upper part of the body; an overflow weir is arranged on the body above the water outlet pipe; an exhaust pipe is arranged on the body above the overflow weir and is connected with an air collector; and a sludge pump connected to the lateral wall of the bottom part of the body is connected with a sludge collecting tank. The invention also provides a method for cultivating the anaerobic granular sludge. A strain cultivated by the device and the device is stable in performance and has a strong capacity of adapting to changes of an external environment, an expansion coefficient of the anaerobic granular sludge bed is high, a cultivation period of the anaerobic granular sludge is short, the cultivation efficiency is high, and the performance of the anaerobic granular sludge is stable.

Description

technical field [0001] The invention relates to the technical field of wastewater biological treatment, and relates to an anaerobic granular sludge cultivation method and a device thereof. technical background [0002] Anaerobic biological treatment technology is the best technology for organic pollution control. Compared with chemical and physical and chemical treatment technology, it has better treatment effect and lower treatment cost. The activity of granular sludge in anaerobic wastewater treatment technology has a great influence on the effect of anaerobic reactor in treating wastewater. The start-up of anaerobic reactor is restricted by anaerobic granular sludge. The prerequisite for the server to start up quickly and run efficiently. The formation of anaerobic granular sludge in the anaerobic reactor is gradually evolved from flocculent sludge. At the beginning, granular sludge first formed, and then granular sludge continued to develop. The number of granular sludg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34
Inventor 施云芬孙萌李英赞刘月华张更宇
Owner NORTHEAST DIANLI UNIVERSITY
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