Upgrading of a small overloaded activated sludge plant using a MBBR system

被引:32
作者
Andreottola, G
Foladori, P
Gatti, G
Nardelli, P
Pettena, M
Ragazzi, M
机构
[1] Univ Trent, Dept Civil & Environm Engn, I-38100 Trent, Italy
[2] Autonomous Province Trento, SOIS, Trent, Italy
来源
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 2003年 / 38卷 / 10期
关键词
biofilm; moving bed; nitrification; organic carbon removal; upgrading; wastewater;
D O I
10.1081/ESE-120023388
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The aim of this research was the application of a biofilm system for the upgrading of a full-scale overloaded activated sludge MWWTP using the MBBR (Moving Bed Biofilm Reactor) technology. The choice of this fixed biomass system appeared appropriate because it offers several advantages including good potential in nitrification process, easiness of management and above all, the possibility to use the existing tank with very few modifications. MBBR system counts only few full-scale plants in Italy at the moment, thus a pilot-scale experimentation was preliminarily carried out. The acquired parameters were used for the full-scale MWWTP upgrading. The upgrading of the activated sludge reactor in the MBBR system has given (1) a relevant increase in the flowrate treated Lip to 60%; (2) a good efficiency in organic carbon removal and nitrification, equal to 88% and 90% respectively, with HRTs of 5.5-7 h; (3) the overcoming of the hydraulic overload of the secondary settler, applying a lamellar settler. It was observed a good correlation between the results obtained at pilot-scale and those observed in the full-scale plant.
引用
收藏
页码:2317 / 2328
页数:12
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