Application of in-situ intergravel purification technology in treat slightly polluted river wa-ter engineering
The in-situ inter-gravel purification technology can absorb and transform the TP in the river by using the phosphorus absorbing filter material,micro organisms and aquatic plants.This technology contributes the inter-gravel purification system to purify the polluted river water in the Hongkeng section of Tingxi River,Xiamen to ensur-ing that the water quality at the state-monitored section of the downstream Aitoutan meets the assessment require-ments.The study indicates that the in-situ inter-gravel purification system has a good effect on improving the water quality of slightly polluted river.The TP in the process effluent has reached the surface water Grade Ⅱ level(the sec-ond best level),which provides an effective way to reduces the investment cost and operating cost of pollutant treat-ment.Furthermore,building the system of in-situ inter-gravel purification can solve the problem of land acquisition for the ecological treatment of slightly polluted rivers,and enhance the ecological landscape.This technology has nu-merous advantages in terms of ecological and economic aspects.
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