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A sewage treatment method with high efficiency, energy saving, consumption reduction and resource recovery

A sewage treatment method and resource recovery technology, which is applied in the field of sewage treatment with high efficiency, energy saving, consumption reduction and resource recovery, can solve the problems of increasing system complexity, increasing infrastructure and operating costs, and unstable nitrification effect of the system, so as to improve free ammonia Inhibition of denitrification, avoiding insufficient carbon sources for denitrification, and improving the effect of relative insufficient carbon sources

Active Publication Date: 2016-04-06
TONGJI UNIV
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Problems solved by technology

The optimal conditions of each microbial population are different, so it is impossible to maximize the simultaneous removal of nitrogen and phosphorus
In particular, nitrifying bacteria have the characteristics of no need for organic carbon sources, low growth rate, long generation period, and difficulty in enrichment, which often cause problems such as unstable nitrification effect of the system, large fluctuations in effluent quality, and many processes contain multiple pollutants. Mud and mixed liquor flow back, increasing the complexity of the system and increasing capital and operating costs

Method used

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  • A sewage treatment method with high efficiency, energy saving, consumption reduction and resource recovery
  • A sewage treatment method with high efficiency, energy saving, consumption reduction and resource recovery

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Embodiment 1

[0023] A set of small-scale test equipment is adopted. Under the continuous operation mode, the sewage enters the activated sludge adsorption tank 1, and enters the sedimentation tank 2 after completing the adsorption reaction to realize the separation of mud and water. The supernatant flows into the next processing unit, and most of the sludge returns. A small part is exhausted from the system. The sludge concentration in the activated sludge adsorption tank 1 is maintained at about 3000mg / L. The hydraulic retention time of the adsorption tank is 35min, the SRT is 0.75 days, and the hydraulic retention time of the sedimentation tank 2 is 2h. The remaining sludge enters the 6.0L high-efficiency anaerobic digestion reactor to produce methane. In the start-up stage of the high-efficiency anaerobic digestion reactor, after adding inoculum sludge, a certain volume of dewatered sludge is fed into the high-efficiency anaerobic digestion reactor every day, and the organic load is g...

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Abstract

The present invention involves a method of efficient energy -saving and consumption reduction and resource recovery methods. The sewage inlet and reflux sludge are fully mixed in the active sludge adsorption tank.In the middle, the water outlet enters the sedimentation tank for solid fluid separation, discharge clarified water and remaining sludge, and the remaining sludge obtains hydrogen or biogas, and digestive sludge through high -efficiency anaerobic digestive reactors.The liquid uses a MAP to send a fluidized bed reactor with a precipitated area. The remaining part of the miralne and sedimentation tanks obtained by the MAP method enters the anaerobic ammonium oxidation and nitrogen oxidation system for nitrogen dehydration;The combination of clarifying water and biogas is used to use advantageous algae and nitrogen fixing bacteria for nitrogen dehydration;It can realize the comprehensive utilization of carbon, nitrogen, and phosphorus in sewage. It has the advantages of energy transmission, phosphate recovery, nitrogen transformation, low energy consumption consumption, and greatly shorten the reaction time.

Description

technical field [0001] The invention relates to the field of denitrification and dephosphorization of sewage, and is a method mainly based on microbial enrichment, advanced anaerobic digestion (mainly referring to high-solid anaerobic digestion, TS>10%), magnesium ammonium phosphate (MAP) precipitation and anaerobic ammonium A sewage treatment method with high efficiency, energy saving, consumption reduction and resource recovery combined with oxidation or nitrogen fixation. Background technique [0002] The water resource crisis has become one of the greatest challenges faced by human beings in the 21st century. The existing sewage treatment plants in my country are mainly aimed at organic carbon pollutants, and the removal effect of nitrogen and phosphorus elements is poor, and nitrogen and phosphorus are the main causes of water pollution. The main nutrient for eutrophication. [0003] The existing biological denitrification and phosphorus removal processes all adopt t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/28
CPCY02E50/30
Inventor 戴晓虎李宁刘文静戴翎翎董滨
Owner TONGJI UNIV
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