Effects of recirculation rate of nitrified liquor and temperature on biological nitrification-denitrification process using a trickling filter

被引：10

作者：

Kanda, Ryo ^{[1
]}

Kishimoto, Naoyuki ^{[2
]}

Hinobayashi, Joji ^{[3
]}

Hashimoto, Tsutomu ^{[4
]}

机构：

[1] Ryukoku Univ, Grad Sch Sci & Technol, 1-5 Yokotani,Setaoe Cho, Otsu, Shiga 5202194, Japan

[2] Ryukoku Univ, Fac Sci & Technol, Otsu, Shiga 5202194, Japan

[3] Dainippon Plast Co Ltd, Dept Dev, Tokyo 1086030, Japan

[4] Dainippon Plast Co Ltd, Sales Dept, Osaka 5300001, Japan

来源：

WATER AND ENVIRONMENT JOURNAL | 2016年 / 30卷 / 3-4期

关键词：

nitrification-denitrification; recirculation rate; temperature effect; trickling filter; SEWAGE-TREATMENT SYSTEM; WATER; EFFICIENCY; REMOVAL; REACTOR; DESIGN;

D O I：

10.1111/wej.12196

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In the modified Ludzack-Ettinger process, high-energy input is required in a nitrification tank. To address this issue, a new biological nitrification-denitrification system was constructed with a trickling filter for nitrification. The effects of recirculation rate of nitrified liquor and temperature through the treatment of municipal wastewater were evaluated. The highest DN removal efficiency was observed at 6.5 h of hydraulic retention in the denitrification tank and 350% of recirculation rate of nitrified liquid against the influent flow rate. The DN removal efficiencies did not reach theoretical values for all conditions tested because the COD/N ratios in the influent often decreased to less than 5 g-COD/g-N and temperatures dropped to less than 15 degrees C in winter. The former inhibited the denitrification process and the latter significantly decreased the bioactivity of nitrifying bacteria. As such, this system is suitable in tropical and subtropical areas with annual minimum temperatures of over 15 degrees C.

引用

页码：190 / 196

页数：7

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