On-site purification system for urban black and smelly inland rivers

Abstract

The invention provides an on-site purification system for urban black and smelly inland rivers, wherein a riverbed is directly used as a treatment space of polluted river water, a section of concrete embankment is arranged in a riverway along the flow direction, and the riverway is separated into two parallel areas of an area for river water treatment and an area for emergency drainage or passing, wherein in the area for river water treatment, four treatment units of a lift pump well, a reaction area, a sediment area and an aeration area are arranged and are communicated with one another along the flow direction, so a complete water treatment facility is formed, the reaction area consists of an ozone contact oxidation zone and a flocculation zone, and the tail end of the aeration area adopts a drop dam mode; and the area for emergency drainage or passing is used as an emergency drainage channel for a flood period and also serves as a passing channel of a pump dredger. The on-site purification system utilizes the treatment facility which is built in the riverbed to on site purify the quality of the urban inland rivers which are black and smelly due to the gathering of a large amount of domestic sewage, has a simple method and a simple structure, does not occupy lands, does not influence flood flowing, and has a good treatment effect.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a system for in-situ water purification of urban inland rivers that are black and smelly due to receiving a large amount of domestic sewage by using treatment facilities built inside the riverbed. Background technique [0002] Due to urban economic development and population growth, it has brought heavy pressure to the ecological environment. Due to the limited collection capacity and supporting construction of the urban sewage pipe network, it cannot meet the needs of urban development, and a large amount of domestic sewage and production wastewater are directly discharged into urban rivers without treatment. Inland rivers in some cities have even been completely reduced to the Nawu River. [0003] At present, my country's rivers are seriously polluted by organic pollutants. The main pollution indicators are ammonia nitrogen, five-day biochemical oxygen demand, permanganate inde...

AI Technical Summary

Problems solved by technology

Although increasing the particle size of the filler can slow down the clogging, it will reduce the purification efficiency per unit volume of the packed bed; although artificial aeration can enhance the biodegradation efficiency, it will increase the treatment cost and the complexity of the purification bed

[0008] Physical and chemical treatment methods are generally not affected by climatic conditions, and the treatment effect is more obvious and stable, but the bottom sludge and sludge produced must be properly disposed of, otherwise it may cause secondary pollution

[0009] Although the in-situ treatment method of polluted rivers does not need to build another diversion pipe network system, all the river water is directly treated in the river channel, but due to the limitation of the channel volume, as well as the influence of unfavorable factors such as water flow velocity and hydraulic scour, some existing In situ treatments are often ineffective

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