Three-stage anaerobic two-stage aerobic inner circulation reclaimed water treater

Abstract

The invention discloses a three-stage anaerobic two-stage aerobic inner circulation reclaimed water treater. Raw water is pumped into an anaerobic cavity and a first-stage anoxic cavity respectively through a water inlet by a lift pump, and a first-stage aerobic cavity is communicated with the first-stage anoxic cavity; effluent of the first-stage aerobic cavity enters a second-stage anoxic cavity through a water collecting weir, and the second-stage anoxic cavity is communicated with a second-stage aerobic cavity; the anaerobic cavity, the first-stage anoxic cavity and the second-stage anoxic cavity are provided with an underwater stirrer respectively; the first-stage and second-stage aerobic cavities are provided with more than two microporous aeration disks supplied with air by a Roots blower; water collecting weir notches are arranged in the first-stage and second-stage aerobic cavities; effluent of the second-stage aerobic cavity is introduced into a guide cylinder through a water collecting weir to enter a sedimentation tank, is converged into a water discharging groove after sedimentation, and enters an active carbon filter cavity, the filtered water enters a disinfection reaction cavity, and a disinfectant of a dosing container inflows automatically through high head for disinfection reaction; water subjected to reaction flows automatically into a water storage cavity from bottom to top; and the water is discharged through a water outlet or recycled. The treater can denitrify and dephosphorize wastewater; and the wastewater sequentially flows through anaerobic units and aeration units and is synchronously subjected to wastewater clarifying processes such as nitrification, denitrification, phosphorus release, phosphorus uptake, sludge discharge and the like so as to be purified.

Description

Technical field: [0001] The invention relates to a water treatment device, in particular to a three-stage anaerobic and two-stage aerobic internal circulation reclaimed water processor. Background technique: [0002] With the development of cities and the improvement of people's living standards, the discharge of urban sewage is increasing day by day, and the composition of sewage is becoming more and more complex. Urban sewage has become one of the main reasons restricting the sustainable development of cities. [0003] Statistics show that my country currently has nearly 48,000 small towns of various sizes and properties, including more than 19,200 official towns, which absorb more than 200 million residents. With the rapid development of township enterprises and the continuous concentration of village and town populations, the number of small towns The amount of sewage discharge is increasing, and most of them do not have effective sewage treatment facilities. Nitrogen an...

AI Technical Summary

Problems solved by technology

[0005] 1. Integration: the most widely used are various buried combined small-scale activated sludge processes and biofilm processes, which are just a simple combination of various conventional processes, with complex process flow, high infrastructure and operating costs, and adaptability to water quality. Narrow range, unsatisfactory nitrogen and phosphorus removal effect, etc.

[0006] 2. Integration of five tanks: When the water inflow is too large, the biological reaction cannot be fully carried out, and the removal effect of the reactor on various pollutants decreases, resulting in a decrease in the removal rate of pollutants; although the longer the hydraulic retention time, the water outlet COD and NH 4 + The lower the -N content, but it is not good for the removal of TN, and from the perspective of practical engineering application, the hydraulic retention time is prolonged, and the project investment and maintenance costs will also increase greatly

However, for the overall MBR market, there is no standardized design method at present, and there are other treatment processes in which the overall investment cost of engineering applications is higher than the same effluent standard, high operating costs per ton of water, high power consumption, and the quality of operation and maintenance personnel. Highly demanding issues, while membrane fouling and membrane life are still the main obstacles affecting its popularization and application

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