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Method for rapidly culturing denitrifying granular sludge

A technology of nitrifying granules and denitrifying bacteria is applied in the field of water treatment, which can solve the problems of sludge floating and sludge bed channeling, and achieves the effects of low cost, simple structure and favorable promotion.

Active Publication Date: 2010-08-11
内蒙古金河环保科技有限公司
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  • Description
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  • Application Information

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Problems solved by technology

[0007] Adopting the method provided by the present invention not only successfully solves the problems of sludge floating and sludge bed channel flow in the denitrification granular sludge cultivation process, but also successfully cultivates denitrification granular sludge with good performance in a short period of time, and The method is simple and effective

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  • Method for rapidly culturing denitrifying granular sludge

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Embodiment 1

[0013] Example 1 , Denitrification Granular Sludge Cultivation

[0014] A chemical company produces ammonia nitrogen wastewater. After testing, its C / N (COD / NO 3 -N) is relatively low, and the nitrate concentration in the effluent after the secondary biochemical process is relatively high. Therefore, it is necessary to perform denitrification treatment on the secondary effluent. Granular sludge, the specific cultivation process is as follows:

[0015] 1.1. Sludge pretreatment

[0016] Take about 20 tons of urban sewage plant sludge and pour it into the USB pool (the effective volume is 200m 3 ), carry out hydrolysis and fermentation treatment at 55°C, and add 7-8kg of potassium nitrate and 2-3kg of methanol every day at the same time for pre-acclimation. The sludge is in the form of fine particles, and there are signs of gas production on the surface, indicating that the pretreatment work is over (the same below).

[0017] 1.2. Granular sludge cultivation

[0018] After...

Embodiment 2

[0023] Example 2 , Denitrification Granular Sludge Cultivation

[0024] The concentration of nitrate in groundwater in a certain area is as high as 150mg / L, seriously exceeding the standard. Therefore, it needs to be denitrified. The process is as follows:

[0025] 2.1. Sludge pretreatment

[0026] Put 3 tons of flocculent sludge under the sun, cover it with a plastic shed, and carry out hydrolysis and fermentation at 40°C. At the same time, add 1 kg of potassium nitrate and 0.6 kg of glucose every day for domestication.

[0027] 2.2. Granular sludge cultivation

[0028] Connect the pretreated sludge to USB (effective volume is 20m 3 ), the treated water volume is 500m 3 d -1 , the influent load is 0.5-5.0gNO 3 -N·L -1 d -1 , using glucose as the carbon source, adjusting C / N to 3.5-4.0.

[0029] Start the system for granular sludge cultivation, and observe during the cultivation process, the results are as follows:

[0030] After the reactor was filled with water, ...

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Abstract

The invention discloses a method for rapidly culturing denitrifying granular sludge with the technical features as follows: preprocessing inoculated aerobic or anaerobic flocculent sludge, speeding up formation of fine granular sludge, enabling the sludge to have certain activity, and inoculating the sludge on an up flow sludge blanket (USB) to obtain the granular sludge in a reactor in a short time with less floater and channels in a sludge bed. The invention has the advantages of shortening USB start time, rapidly culturing denitrifying granular sludge, simple and effective method, strong operability, low cost and easy popularization, and is especially suitable for starting a large-scale USB reactor.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for rapidly cultivating denitrification granular sludge. Background technique [0002] At present, whether in industrially developed countries or developing countries, the problem of nitrate pollution has rapidly developed into an important environmental problem. In this regard, scientists have proposed many solutions. Among them, the biological denitrification method is considered to be the most effective because it can completely reduce nitrate to nitrogen, has low operating costs, high nitrogen removal effect, and can eliminate difficult-to-dispose chemical sludge. Promising method for denitrification. However, the traditional biological denitrification method has a small denitrification rate, requires a large reactor volume, and high construction costs; it is not suitable for small-scale and dispersed treatment of wastewater containing nitrate (e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/12
CPCY02W10/10
Inventor 金锡标王锋别红梅徐宏勇
Owner 内蒙古金河环保科技有限公司
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