Urban River Water Purification Experiment by Strengthening Ecological Engineering Methods

Abstract:

Based on the biological purification technology combined with the engineering measures, the enhanced nitrogen purification biological experiment is implemented in Wenyu River in Beijing. The water in the river mainly is the outflow from the sewage treatment plant, in which the ammonium (NH4-N) has been effectively removed for the deeply nitrification, while treatment of the nitrate nitrogen (NO3-N) and total nitrogen (TN) is incomplete due to the denitrification. The water has low C/N value and has poor biodegradability. In this study, aiming at the water feature of low C/N and poor biodegradability, the effective way to strengthen denitrification by some enhanced techniques, such as increasing the microorganisms number and biodegradability (ie, improved nitrogen ratio), changing denitrification rates and so on, has been studied. The experimental results show that under the condition of water flow (Q) as 15 ~ 27L/hr, hydraulic detention time as (HRT) 10 ~ 18h, concentration of nitrate nitrogen (NO3-N) as 12.20 ~ 31.44mg / L, and total nitrogen (TN) as 14.50 ~ 34.71 mg / L, the removal rates of NO3-N and TN are over 30%.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 1341-1347
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.1341
• Online since: July 2014
• Authors: Shu Hua Yin*, Yu Chun Wang, Wen Qi Peng, Yan Liang Du, Bo Gao, Ji Jun Gao, Huai Dong Zhou, Qing Yi Meng, Qi Jun Li
• Keywords: Ecological Engineering, Enhanced Nitrogen Removal, Urban River, Water Purification

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