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Inverted adsorption precipitation system and process based on classified recovery of carbon sources

A technology for adsorption, precipitation and carbon source, applied in sedimentation treatment, water/sewage multi-stage treatment, filtration treatment, etc., can solve problems such as low carbon source recovery rate and carbon source loss, and achieve improved carbon source recovery rate and reduced operation Cost, the effect of reducing aeration energy consumption

Pending Publication Date: 2021-06-29
SHANDONG UNIV
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Problems solved by technology

The high-load activated sludge process has extremely short sludge residence time (0.3-0.5d), hydraulic retention time (30min) and extremely high organic load (2-6kgBOD 5 / kgMLSS / d), utilize the biological flocculation adsorption of activated sludge and sediment concentration to realize the enrichment and recovery of carbon source in sewage, but the contriver finds, such recovery process is a kind of mixed recovery to carbon source in sewage ( That is, various forms of carbon sources in sewage are mixed together and recycled by sludge adsorption or absorption), this recycling method leads to the loss of a large amount of carbon sources (the lost carbon sources account for about 30-50% of the total carbon sources), carbon sources The recovery rate is very low, about 30%

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  • Inverted adsorption precipitation system and process based on classified recovery of carbon sources

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Embodiment 1

[0057] like figure 1 As shown, an inverted adsorption sedimentation process based on classified recovery of carbon sources, the device mainly includes water inlet pump 1, first water inlet pipe 2, inclined plate sedimentation tank 3, perforated overflow pipe 4, post activated sludge adsorption tank 5. Water outlet pipe 6, aeration pump 7, microporous aeration disc 8, sludge pump 9, sludge pipe 10 and water outlet pump 11.

[0058] The front sedimentation tank adopts inclined plate sedimentation tank 3, and its effective volume is 50% of the effective volume of rear activated sludge adsorption tank 5, the inclined plate is inclined at 60°, the distance between inclined plates is 4 cm, and the volume of mud bucket is about 20% of the volume of sedimentation tank 3. The effective volume of the rear activated sludge adsorption tank 5 is twice the effective volume of the inclined plate sedimentation tank 3, and the diameter-depth ratio of the activated sludge adsorption tank 5 is ...

Embodiment 2

[0061] An inverted adsorption-sedimentation process based on the classification and recovery of carbon sources, intermittent operation, a cycle lasts 65 minutes: the pre-sloping plate sedimentation tank is filled with water for 20 minutes, idle for 45 minutes, the post-activated sludge adsorption tank is filled with water + aeration for 20 minutes, and sedimented for 20 minutes , out of water for 20 minutes, and idle for 5 minutes. In the water intake stage, the sewage first enters the inclined plate sedimentation tank to enrich and recover the carbon source that is easy to precipitate in the sewage. The effluent of the inclined plate sedimentation tank enters the activated sludge adsorption tank, where it is mixed with the sludge and aerated at the same time. The DO is controlled at 0.5-1mg / L, to promote the activated sludge to absorb carbon sources that are not easy to settle in the sewage; in the sedimentation stage, the mud level of the adsorption tank will drop by more th...

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Abstract

The invention discloses an inverted adsorption precipitation system and process based on classified recovery of carbon sources. According to the process, to-be-treated sewage firstly passes through a front inclined plate precipitation tank to recover granular carbon sources, and then enters a rear micro-aerobic aeration activated sludge adsorption tank to adsorb and recover colloids and dissolved carbon sources in the sewage, wherein the to-be-treated sewage is treated by the grating and the grit chamber to remove garbage and silt therein. In the whole process, the aeration energy consumption of the activated sludge adsorption tank is further reduced in an intermittent operation mode, wherein the front precipitation tank is mainly used for recovering the granular carbon source which is easy to settle in the sewage, the recovering cost of the granular carbon source is reduced to the maximum extent through the simplest sedimentation mode, and the removal of the granular carbon source remarkably reduces the load pressure of the rear activated sludge adsorption tank, so that the rear activated sludge adsorption tank only recovers the residual colloid and dissolved carbon source in the sewage, the recovery capacity is greatly improved, and the recovery efficiency is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and sewage treatment, and in particular relates to an inverted adsorption precipitation system and process based on classified recovery of carbon sources. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The rapid growth of population and the rapid development of urbanization have led to a rapid increase in sewage discharge. Sewage is an effective carrier of resources, which contains a large amount of carbon sources. Fully recovering these carbon sources and transforming resources is the key to achieving energy neutrality in sewage treatment. important path to sustainable develo...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F9/00C02F2001/007C02F1/001C02F3/1215Y02W10/10
Inventor 张建梁爽王宁孙丰凯
Owner SHANDONG UNIV
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