Integrated device for performing advanced denitrification treatment on domestic sewage by self-oxygenating fixed bed

Abstract

The invention discloses an integrated device for performing advanced denitrification treatment on domestic sewage by a self-oxygenating fixed bed, which comprises a biofilm-process treatment part and a precipitated mud-water separation part, wherein the biofilm-process treatment part comprises at least two groups of treatment units; each group of treatment unit comprises a flow descending unit and a flow ascending unit which are sequentially arranged; the flow descending unit of the first group of treatment unit is provided with water inlet pipe; the bottoms of the flow descending unit and the flow ascending unit are provided with communicated grids; a biofilm filler is arranged in the flow descending unit; a water-falling weir is arranged at the upper end of the flow ascending unit; the precipitated mud-water separation part comprises a precipitation pool; one end of the precipitation pool is provided with a water distribution groove in an isolation way, while the other end is provided with a water collection groove in the isolation way; the water collection groove is connected with a water outlet pipe; the water distribution groove is communicated with the upper end of the biofilm-process treatment part; water distribution holes are reserved at the bottom of the water distribution groove; and water distribution pipes are connected with and arranged at the lower ends of the water distribution holes. The integrated device can reduce the energy consumption of sewage treatment and reduce the complexity of the sewage treatment process, along with simple and convenient operation, the natural drainage of the treated sewage, energy saving, simplified running and stable treatment effect.

Description

technical field [0001] The invention relates to a treatment equipment for small and medium-sized domestic sewage treatment projects, urban concentrated residential areas, rural areas, scenic spots, tourist attractions, stations, docks and other domestic sewage, especially a self-oxygenated fixed bed domestic sewage denitrification Advanced processing integrated device. Background technique [0002] At present, the level of domestic sewage treatment technology in my country is uneven, and the scale of treatment varies. Large-scale urban sewage treatment plants can be designed and constructed according to the requirements of the design specifications to achieve effective treatment of domestic sewage and meet the discharge standards; for small towns and villages with low management level, small treatment scale, and poor economic affordability, etc. , It is necessary to adopt simple, effective, and easy-to-manage sewage treatment technology, or even a set of simple integrated, ...

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Problems solved by technology

[0003] Nowadays, there are many types of rural domestic sewage treatment technologies and equipment in China, including the use of activated sludge method and biofilm method, and the fillers of biofilm method are also various. treatment, especially in the degradation and removal of COD and SS, but the removal ability of ammonia nitrogen and total nitrogen is not ideal, especially for unpowered equipment, etc., and its oxygen supply capacity cannot meet the oxygen demand of nitrification at all; while some Some processes and equipment adopt the method of forced oxygen supply or the method of falling water aeration. These processes have a significant removal effect on ammonia nitrogen, but to achieve a good denitrification effect, an anoxic denitrification unit must be added to the process In this way, the advantages of simple process and easy management for rural domestic sewage treatment are lost, and it is similar to the urban sewage treatment process.

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