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Open AccessArticle

Unconfined Dense Plunging Jets Used for Brine Disposal from Desalination Plants

1
Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
2
Department of Environmental Technologies and Management, Kuwait University, POB 5969, Safat 13060, Kuwait
3
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
*
Author to whom correspondence should be addressed.
Currently at: Division of Engineering, New York University, Abu Dhabi 129188, UAE.
Processes 2020, 8(6), 696; https://doi.org/10.3390/pr8060696
Received: 26 April 2020 / Revised: 9 June 2020 / Accepted: 10 June 2020 / Published: 15 June 2020
(This article belongs to the Special Issue Design, Control and Optimization of Desalination Processes)
Laboratory experiments were conducted to measure entrained air bubble penetration depth and dilution of a dense vertical unconfined plunging jet to evaluate its performance as an outfall to dilute brine from desalination plants as well as a means to aerate water column. Experiments involved neutrally buoyant or dense plunging jets discharging in quiescent receiving water. The density difference between effluent and receiving water, the plunging jet length (height above water surface), and the receiving water salinity were varied in the experiments. Observed penetration depth for neutrally buoyant jets was somewhat greater than previously reported, and increased modestly with jet density. Increasing density also resulted in an increasing number of fine bubbles descending together with the dense plume. These observations can help guide the design of plunging jets to mitigate anoxic conditions in the water column when brine is introduced to a receiving water body, as with seawater desalination. View Full-Text
Keywords: plunging jet; dense jet; bubble penetration; air entrainment; desalination; aeration; multiphase flow plunging jet; dense jet; bubble penetration; air entrainment; desalination; aeration; multiphase flow
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MDPI and ACS Style

Chow, A.C.; Shrivastava, I.; Adams, E.E.; Al-Rabaie, F.; Al-Anzi, B. Unconfined Dense Plunging Jets Used for Brine Disposal from Desalination Plants. Processes 2020, 8, 696.

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