Precise control of water and wastewater treatment systems with non-ideal heterogeneous mixing models and high-fidelity sensing

2021 ◽  
pp. 132819
Author(s):  
Tianbao Wang ◽  
Chenyu Wang ◽  
Zhiheng Xu ◽  
Can Cui ◽  
Xingyu Wang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Mixing Models ◽  
High Fidelity ◽  
Water And Wastewater Treatment ◽  
Precise Control ◽  
Water And Wastewater ◽  
Wastewater Treatment Systems

Recent development of an in-situ image detecting system for floc characterization and monitoring

2010 ◽  
Vol 61 (11) ◽  
pp. 2699-2706
Author(s):  
Wang Dongsheng ◽  
Feng Jiang ◽  
Xie Jiankun ◽  
Xu Xuzheng ◽  
Yao Chonghua ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Average Diameter ◽  
Ann Model ◽  
Water And Wastewater Treatment ◽  
Precise Control ◽  
Coagulation Process ◽  
Aggregation Behaviour ◽  
Coagulant Dosage ◽  
Water And Wastewater

Coagulation control plays a significant role in the final yield of sludge volume during water and wastewater treatment. The precise control of coagulant dosage, floc formation and aggregation behaviour becomes the important target for the coagulation process both in water and wastewater treatment. A critical review is presented first in this paper on the recent advances in coagulation control. In particular, the development of an in-situ image detecting system (IDS) based on characterization of floc properties, involving average diameter, fractal dimension and apparent strength is discussed. The results show that the data obtained from the IDS are generally in accordance with the outcome of common coagulation experiment, and have sensitivity for the slow stirring rate, raw water turbidity and coagulant dosage, in different degrees. The combination of IDS and ANN model is also discussed. This provides a possibility for applying the proposed IDS to control the coagulation process in water and wastewater treatment.

scholarly journals SOFTWARE DEVELOPMENT FOR HYDRODYNAMIC STUDY IN WATER AND WASTEWATER TREATMENT SYSTEMS

2009 ◽  
Vol 9 (1) ◽  
pp. 31
Author(s):  
Rodrigo Braga Moruzzi ◽  
Marco Antonio Penalva Reali
Keyword(s):  
Wastewater Treatment ◽  
Software Development ◽  
Acoustic Doppler Velocimeter ◽  
Water And Wastewater Treatment ◽  
Hydrodynamic Study ◽  
Water And Wastewater ◽  
Wastewater Treatment Systems

Este artigo apresenta o desenvolvimento de um programa computacional para tratamento dos dados de estudos hidrodinâmicos empregando uma sonda acústica denominada Acoustic Doppler Velocimeter (ADV). O programa desenvolvido foi utilizado em uma unidade piloto de flotação por ar dissolvido (FAD) empregada para tratamento de água e água residuária. Estudos com equipamentos que empregam o princípio Doppler são amplamente empregados para diferentes aplicações, entretanto os dados de saída são apresentados em forma tabular tornando a interpretação difícil e imprecisa. Assim, o programa computacional desenvolvido foi concebido para tratar estatisticamente os dados, calcular e plotar os vetores resultantes bem como produzir gráficos de superfície (3D). Adicionalmente, pode-se gerar cortes em qualquer seção de interesse, criando visualizações em duas dimensões dos vetores resultantes. O programa apresentou-se como uma poderosa ferramenta para incremento de sistemas de tratamento e pode contribuir no estudo hidrodinâmico de reatores em qualquer escala.

On the use of crushed shells of apricot stones as the upper layer in dual media filters

2004 ◽  
Vol 48 (11-12) ◽  
pp. 497-503 ◽  
Author(s):  
S. Aksoğan ◽  
A. Baştürk ◽  
E. Yüksel ◽  
Ö Akgiray
Keyword(s):  
Wastewater Treatment ◽  
Silica Sand ◽  
Water And Wastewater Treatment ◽  
Turbidity Removal ◽  
Small Water ◽  
Anthracite Coal ◽  
The World ◽  
Water And Wastewater ◽  
Removal Efficiencies ◽  
Wastewater Treatment Systems

The use of crushed shells of apricot stones instead of anthracite coal in dual-media filters is investigated. Turbidity removal efficiencies were measured for several filtration rates in dual media filters composed of shells of apricot stones above silica sand and anthracite coal above silica sand. Backwash (fluidization) experiments were carried out using sieved fractions of crushed shells of apricot stones to establish curves of expansion versus backwash velocity at 25°C. Such curves can be used in the design of filters employing this material. It is believed that the use of such a locally available and cheaper alternative filter medium would be of interest in many small water and wastewater treatment systems around the world.

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