Integration of a MSF Desalination System with a HDH System for Brine Recovery

Dahiru U. Lawal, Mohamed A. Antar and Atia E. Khalifa
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Dahiru U. Lawal: Interdisciplinary Research Center for Membranes and Water Security, KFUPM, Dhahran 31261, Saudi Arabia
Mohamed A. Antar: Mechanical Engineering Department, KFUPM, Dhahran 31261, Saudi Arabia
Atia E. Khalifa: Mechanical Engineering Department, KFUPM, Dhahran 31261, Saudi Arabia

Sustainability, 2021, vol. 13, issue 6, 1-27

Abstract: A hybrid Multi-Stage Flash–Humidification Dehumidification (MSF-HDH) desalination system is investigated for energy recovery from an MSF system. The hybrid MSF-HDH system increases total productivity and performance ratio and reduces brine rejection. Hot condensed steam that leaves the MSF brine heater is used to warm the rejected pretreated brine from MSF to a higher temperature suitable for HDH system operation (about 60 °C). This allows us to increase the product (desalinated water) without additional “external” energy input to the hybrid system. Four different layouts of the integrated MSF-HDH system are presented and compared. The results show that an HDH system can utilize over 66% of an existing MSF brine blowdown, while the hybrid system can achieve a gained output ratio—GOR, water recovery ratio—RR, productivity and freshwater cost of 8.73, 44.86%, 30,549 m 3 /day and 1.068 $/m 3 of freshwater, respectively. Utilizing 66.96% of MSF brine blowdown by the HDH system leads to a daily HDH productivity of about 670 m 3 of drinking water, which is enough to support 134,000 persons considering a daily consumption of 5 L of drinking water per person.

Keywords: humidification; dehumidification; desalination; HDH; hybridization; MSF; gained output ratio; GOR; performance ratio (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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