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A preparation device and method for whole autotrophic denitrification granular sludge

A whole-process autotrophic denitrification and granular sludge technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problem of increased energy consumption and difficulty in aeration by blast aeration Control and other issues to achieve the effect of saving space and energy consumption, high economy, and high denitrification efficiency

Active Publication Date: 2019-05-31
GUOHE ENVIRONMENTAL RES INST (NANJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blast aeration increases energy consumption, and the amount of aeration is difficult to control, so the economy needs to be improved

Method used

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  • A preparation device and method for whole autotrophic denitrification granular sludge
  • A preparation device and method for whole autotrophic denitrification granular sludge
  • A preparation device and method for whole autotrophic denitrification granular sludge

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preparation example Construction

[0033] The preparation method of the whole process autotrophic denitrification granular sludge of the present invention comprises the following steps:

[0034] Step 1, inoculating 0.5L concentration in the reactor is the Anammox sludge of 4.005g / L and 0.5L concentration is the municipal aerobic pool sludge of 4.097g / L;

[0035] Step 2, introducing the artificial high-ammonia-nitrogen waste water in the water inlet tank into the reactor through the water inlet pump, using the pH adjustment box to adjust the pH of the inlet water to 7-8; adjusting the water temperature of the reactor to 30-32°C through the temperature controller; Among them, the ammonia nitrogen concentration of artificial high ammonia nitrogen wastewater is 400mg / L;

[0036] Step 3, start stirring, add 2.5g / L~3g / L KHCO into the water 3 , after a period of reaction, stop stirring, and discharge the precipitated supernatant into the drainage tank;

[0037] Step 4, repeat the operation of steps 2 to 3 several ti...

Embodiment 1

[0043] The internal effective volume of reactor 1 is 2L (cylindrical drainage area 1L, conical sedimentation area 1L), the distance between the bottom of reactor inner chamber 11 and the bottom of outer chamber 2 is 0.04m, and the outer diameter of reactor 1 is 0.1m , the inner diameter is 0.08m, the ratio of the outer diameter to the height of the reactor 1 is 1:2, the radius of the stirring blade 3 is 0.06m, the distance from the bottom of the inner chamber 11 of the reactor is 0.063m, and the height of the baffle plate 13 is higher than the normal water surface 0.03m, 0.5L of Anammox sludge (sludge concentration: 4.005g / L) and 0.5L of municipal aerobic tank sludge (sludge concentration: 4.097g / L) were inoculated into Reactor 1.

[0044] The artificial high ammonia nitrogen wastewater composition of the present invention configuration sees Table 1:

[0045] Table 1 Composition of experimental simulated wastewater

[0046]

[0047] The composition and concentration of tra...

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Abstract

The invention discloses a full autotrophic denitrification granular sludge preparation device which comprises a reactor, a water feed tank, a water discharge tank, a pH regulating box, an adjustable-speed motor and a water bath, wherein the reactor is composed of an inner cavity and an outer cavity; the water feed tank and water discharge tank communicate with the inner cavity of the reactor; a detecting head of the pH regulating box extends into the inner cavity of the reactor; the adjustable speed motor is connected with a stirring paddle; the stirring paddle extends into the inner cavity of the reactor; and the water bath and the outer cavity of the reactor form a circulation loop through a pipeline; and the inner cavity is divided into a drainage region and a deposition region. The invention also discloses a preparation method of full autotrophic denitrification granular sludge. By adopting the mechanical aeration, the liquid level of the mixed liquid is continuously renewed to contact air, thereby effectively increasing the dissolved oxygen in water; and thus, the atmospheric reaeration is formed to perform oxygenation on the reactor, and meanwhile, the wastewater and sludge are thoroughly mixed, so the device has very high economical efficiency. The method can quickly form the granular sludge with an aerobic outer layer and an anaerobic inner layer, and the denitrification efficiency is 79.40%.

Description

technical field [0001] The invention relates to a mechanical aeration type full autotrophic denitrification granular sludge preparation device, and also relates to a method for preparing the full autotrophic denitrification granular sludge by using the above-mentioned device, which belongs to the field of urban sewage treatment and resource utilization. Background technique [0002] Nitrogen content is an important indicator of water quality control. The nitrogen content in the water body will cause severe eutrophication and endanger the aquatic ecosystem. High ammonia nitrogen wastewater has complex components, poor biodegradability, and failure to meet discharge standards is still a difficulty in water treatment. [0003] The high ammonia nitrogen system is easy to realize short-range nitrification, and the system realizes short-range nitrification through combined inhibition of free ammonia (FA) and free nitrous acid (FNA). At present, domestic and foreign research on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34C02F101/16
CPCC02F3/302C02F3/303C02F3/307C02F3/34C02F2101/16
Inventor 周仕华李超操家顺薛朝霞费罗兰虞云霄姚永连
Owner GUOHE ENVIRONMENTAL RES INST (NANJING) CO LTD