Valuation of OSA process and folic acid addition as excess sludge minimization alternatives applied in the activated sludge process

被引：3
|
作者：
Martins, C. L. [1 ]
Velho, V. F. [1 ]
Ramos, S. R. A. [1 ]
Pires, A. S. C. D. [2 ]
Duarte, E. C. N. F. A. [2 ]
Costa, R. H. R. [1 ]
机构：
[1] Dept Sanit & Environm Engn UFSC CTC ENS, Campus Univ Trindade, BR-88010970 Florianopolis, SC, Brazil
[2] Super Inst Agron, Lisbon, Portugal
来源：
WATER SCIENCE AND TECHNOLOGY | 2016年 / 73卷 / 04期
关键词：
folic acid addition; oxic-settling-anaerobic process; sludge minimization; WASTE-WATER TREATMENT; SIDE-STREAM REACTOR; REDUCTION; PERFORMANCE; MECHANISM;
D O I：
10.2166/wst.2015.517
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 study was to investigate the ability of the oxic-settling-anaerobic (OSA)-process and the folic acid addition applied in the activated sludge process to reduce the excess sludge production. The study was monitored during two distinct periods: activated sludge system with OSA-process, and activated sludge system with folic acid addition. The observed sludge yields (Yobs) were 0.30 and 0.08 kgTSS kg(-1) chemical oxygen demand (COD), control phase and OSA-process (period 1); 0.33 and 0.18 kgTSS kg(-1) COD, control phase and folic acid addition (period 2). The Yobs decreased by 73 and 45% in phases with the OSA-process and folic acid addition, respectively, compared with the control phases. The sludge minimization alternatives result in a decrease in excess sludge production, without negatively affecting the performance of the effluent treatment.
引用
收藏
页码：734 / 739
页数：6
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