Simulation of sludge blanket height in clarifiers

• Published in: Journal of Shanghai University Vol. 13; no. 4; pp. 287 - 291
• Main Author: 周振 吴志超 王志伟 顾国维
• Format: Journal Article
• Language: English
• Published: Heidelberg Shanghai University Press 01.08.2009; School of Energy and Environmental Engineering,Shanghai University of Electric Power,Shanghai 200090,P.R.China; College of Environmental Science and Engineering,Tongji University,Shanghai 200092,P.R.China%College of Environmental Science and Engineering,Tongji University,Shanghai 200092,P.R.China
• Subjects: Classical Mechanics; Engineering; Environment; Environmental and Chemical Engineering; Life Sciences; Materials Science; Mathematical and Computational Engineering; Mechatronics; 动态仿真模型; 杂交测序; 污水处理厂; 测序方法; 澄清池; clarifier; simulation; wastewater treatment; sludge blanket height (SBH)
• ISSN: 1007-6417; 1863-236X
• DOI: 10.1007/s11741-009-0407-2

Sludge blanket height （SBH） is an important parameter in the clarifier design, operation and control. Based on an overview and classification of SBH algorithms, a modified SBH algorithm is proposed by incorporating a threshold concentration limit into a relative concentration sharp change algorithm to eliminate the disturbance of compression interfaces on the correct simulation of SBH. Pilot-scale test data are adopted to compare reliability of three SBH algorithms reported in literature and the modified SBH algorithm developed in this paper. Calculated results demonstrate that the three SBH algorithms give results with large deviation （〉 50%） from measured SBH, especially under low solid flux conditions. The modified algorithm is computationally efficient and reliable in matching the measured data. It is incorporated into a one- dimensional clarifier model for stable simulation of pilot-scale experimental clarifier data and into dynamic simulation of a full-scale wastewater treatment plant （WWTP） clarifier data.