In-situ reducing device of initial rainwater pollutants of urban landscape river

Abstract

The invention relates to an in-situ reducing device of initial rainwater pollutants of urban landscape river. A conventional rainwater port is communicated with an overflow distributing well which is communicated with a rainwater retaining chamber through a water pipe and is provided with an adjustable overflow weir, and suspended organism filling balls are placed in the rainwater retaining chamber. The invention overcomes the defects of reconstruction of urban road surfaces, huge project cost, low possibility of general implementation, limitation of actual spaces of a river way and a bankside on constructing a large-capacity storage pond, processing requirement of a sewage processing plant after raining, large project investment and the like existing in two kinds of methods of source reduction, in-place processing and collection and storage processing. The invention effectively retains granular organic matter at the initial period of raining, reduces the input quantity of the rainwater for the river, and can remove granular organic matter of more than 70% and biologically degrade so as to lower the pollution degree of the initial rainwater on the water quality and the ecology of the urban landscape river. The invention has the advantages of simple structure, reliable effect and convenient maintenance.

Description

technical field [0001] The invention relates to an urban surface runoff rainwater treatment device, in particular to an in-situ reduction device for urban landscape river initial rainwater pollutants. Background technique [0002] With the intensification of urban ground pollution, the pollution of rainwater runoff is becoming more and more serious. Especially the initial runoff formed by rainfall contains a lot of pollutants, some pollutants (such as BOD 5 ) concentration is similar to the influent water quality of urban sewage plants. These pollutants mainly come from atmospheric deposition, ground garbage accumulation, vehicle emissions and ground erosion. The pollutants carried in the rainfall runoff are almost concentrated in the initial few millimeters of rainwater, and its pollution load is much higher than that of the middle and late rainwater. If this part of the runoff is directly discharged, it will cause huge pollution to the urban landscape river and affect th...

AI Technical Summary

Problems solved by technology

However, this method needs to build a large-volume storage tank near the rainwater discharge outlet, which is limited by the actual space of the river course and bank slope in application, and the initial rainwater needs to be transferred to the sewage treatment plant after the rain for treatment. The project investment is large and the management Complicated and difficult to widely promote and apply

Images