Particle removal optimization in rotating dissolved air flotation used in paper‐recycling wastewater treatment

2021 ◽  
Author(s):  
Abbas Hasannattaj Jelodar ◽  
Hasan Amini Rad ◽  
Seyed Mehdi Borghei ◽  
Manuchehr Vossoughi ◽  
Rahmatollah Rouhollahi
Keyword(s):  
Wastewater Treatment ◽  
Particle Removal ◽  
Paper Recycling ◽  
Dissolved Air Flotation ◽  
Air Flotation ◽  
Dissolved Air

Evaluation of flocculation and dissolved air flotation as an advanced wastewater treatment

2001 ◽  
Vol 43 (8) ◽  
pp. 83-90 ◽  
Author(s):  
A. C. Pinto Filho ◽  
C. C. Brandão
Keyword(s):  
Wastewater Treatment ◽  
Domestic Wastewater ◽  
High Rate ◽  
Advanced Treatment ◽  
Dissolved Air Flotation ◽  
Anaerobic Reactor ◽  
Treatment Processes ◽  
Domestic Wastewater Treatment ◽  
Air Flotation ◽  
Dissolved Air

A bench scale study was carried out in order to evaluate the applicability of dissolved air flotation (DAF) as an advanced treatment for effluents from three different domestic wastewater treatment processes, namely: (i) a tertiary activated sludge plant ; (ii) an upflow sludge blanket anaerobic reactor (UASB); and (iii) a high-rate stabilization pond.

Optimising dissolved air flotation/filtration treatment of algae-laden lagoon effluent using surface charge: a Bolivar treatment plant case study

2012 ◽  
Vol 66 (8) ◽  
pp. 1684-1690 ◽  
Author(s):  
Russell Yap ◽  
Michael Holmes ◽  
William Peirson ◽  
Michael Whittaker ◽  
Richard Stuetz ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Surface Charge ◽  
Wastewater Treatment Plant ◽  
Pilot Plant ◽  
Treatment Plant ◽  
Dissolved Air Flotation ◽  
Air Flotation ◽  
A Charge ◽  
Dissolved Air

Dissolved air flotation (DAF) incorporating filtration (DAFF) is used at the Bolivar wastewater treatment plant (WWTP) to polish lagoon effluent for reuse. Elevated algal populations are frequently experienced and can lead to increased coagulant requirements and process control issues. Streaming current detectors (SCDs) and a charge demand analyser (CDA) were used to monitor the full-scale plant. This was followed by an optimisation study using a pilot plant with a CDA. It was found that the normal operational charge demand range for DAF at Bolivar was between −46 and −40 μeq L−1. Decreasing the pH of coagulation reduced coagulant consumption and facilitated more sensitive CDA responses to changes in alum dose.

5 Dissolved Air Flotation (DAF) for Wastewater Treatment

2017 ◽  
pp. 145-182 ◽  
Author(s):  
Puganeshwary Palaniandy ◽  
Hj Adlan ◽  
Hamidi Aziz ◽  
Mohamad Murshed ◽  
Yung Hung
Keyword(s):  
Wastewater Treatment ◽  
Dissolved Air Flotation ◽  
Air Flotation ◽  
Dissolved Air

Performance of natural coagulants obtained from agro-industrial wastes in dairy wastewater treatment using dissolved air flotation

2020 ◽  
Vol 37 ◽  
pp. 101453 ◽  
Author(s):  
Gustavo Lopes Muniz ◽  
Alisson Carraro Borges ◽  
Teresa Cristina Fonseca da Silva
Keyword(s):  
Wastewater Treatment ◽  
Dairy Wastewater ◽  
Industrial Wastes ◽  
Dissolved Air Flotation ◽  
Natural Coagulants ◽  
Air Flotation ◽  
Dissolved Air

Dissolved air flotation model for drinking water treatment

2000 ◽  
Vol 27 (2) ◽  
pp. 373-382 ◽  
Author(s):  
Ayman R Shawwa ◽  
Daniel W Smith
Keyword(s):  
Water Treatment ◽  
Kinetic Model ◽  
Contact Zone ◽  
Removal Rate ◽  
Particle Removal ◽  
Dissolved Air Flotation ◽  
First Order ◽  
Air Flotation ◽  
Particle Attachment ◽  
Dissolved Air

In this study, a kinetic model that describes bubble-particle transport and attachment in the contact zone of dissolved air flotation (DAF) process is presented. The kinetic model, which is based on the assumption that the contact zone is analogous to a chemical reactor, describes the particle removal rate as a first-order reaction with respect to the concentration of particles. It identified important parameters, such as the bubble-particle attachment efficiency (αPB). The theoretical first-order particle removal rate constant (kP), based on the mathematical model, was determined by varying αPB from 0.1 to 1.0. On the other hand, the experimental kP value was determined by measuring the mean residence time, the degree of mixing of particles, and the particle removal efficiency of the contact zone by conducting pilot-scale DAF experiments at different hydraulic loading rates and recycle ratios. The experimentally determined first-order particle removal rate constant was equal to the theoretical kP value when the bubble-particle attachment efficiency (αPB) was in the range of 0.35 to 0.55, which is considered typical for water treatment applications. The kinetic model can be used to predict DAF removal efficiencies provided that αPB is determined for the system under investigation and that the operating conditions applied in this research are used. However, independent experiments are required to verify the applicability of the proposed model.Key words: algae, bubble, coagulation, dissolved air flotation, flocculation, kinetic model, particle size distribution, water treatment.

Dissolved air flotation separation for pretreatment of membrane bioreactor in domestic wastewater treatment

2014 ◽  
Vol 64 (2) ◽  
pp. 186-193 ◽  
Author(s):  
Youngsuk Kim ◽  
Donghwan Choi ◽  
Meiying Cui ◽  
Jeonyoul Lee ◽  
Bunsu Kim ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Membrane Bioreactor ◽  
Domestic Wastewater ◽  
Dissolved Air Flotation ◽  
Domestic Wastewater Treatment ◽  
Air Flotation ◽  
Dissolved Air

Feasibility study of high-rate dissolved air flotation process for rapid wastewater treatment

2015 ◽  
Vol 64 (8) ◽  
pp. 927-936 ◽  
Author(s):  
Mi-Sug Kim ◽  
Seok Dockko ◽  
Gyunnam Myung ◽  
Dong-Heui Kwak
Keyword(s):  
Wastewater Treatment ◽  
Feasibility Study ◽  
High Rate ◽  
Dissolved Air Flotation ◽  
Flotation Process ◽  
Air Flotation ◽  
Dissolved Air

Dissolved Air Flotation (DAF) for Wastewater Treatment

2017 ◽  
pp. 657-694
Author(s):  
Puganeshwary Palaniandy ◽  
Hj. Mohd Nordin Adlan ◽  
Hamidi Abdul Aziz ◽  
Mohamad Fared Murshed ◽  
Yung-Tse Hung
Keyword(s):  
Wastewater Treatment ◽  
Dissolved Air Flotation ◽  
Air Flotation ◽  
Dissolved Air
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