Pilot plant evaluation of advanced vs. conventional scale inhibitors for RO desalination

F. H. Butt; F. Rahman; U. Baduruthamal

doi:10.1016/0011-9164(95)00072-0

Pilot plant evaluation of advanced vs. conventional scale inhibitors for RO desalination

F. H. Butt^*, F. Rahman, U. Baduruthamal

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

An advanced anti-scalant, consisting of a polyacrylate and hydroxyethylidene diphosphonate (HEDP), was tested against the conventional H₂SO₄ and sodium hexa-meta-phosphate (SHMP) inhibitors in a pilot plant which had parallel RO units. The two units were fitted with identical brackish hollow fine fiber (HFF) permeators arranged in a two-stage mode which received the same brackish feed water, and were operated at the same feed pressure (27.6 bar/400 psig) and product water recovery (70%). Unit #1 was treated 9 ppm of as-received advanced anti-scalant, and unit #2 was treated with 6 ppm of SHMP and about 130 ppm of 98% H₂SO₄. The pilot plant trial lasted for 3,000 h. The techno-economic evaluation of the two scale control treatments was carried out in terms of pumping energy, the anti-scalants consumed, and the quality and total output of the product water produced in 3,000 h. The pumping energy and scale control treatment costs (as $/m³ of water produced) were same for the two treatments; but in terms of salt rejection, product TDS and output, performance of the advanced anti-scalant was inferior; after 3,000 h the salt rejection of unit #1 (which operated on the advanced anti-scalant) was about 81% vs. 94% for unit #2 (H₂SO₄+SHMP). Similarly, in 3,000 h unit #1 produced 20% less water of unacceptable quality (620 ppm) whereas unit #2 produced more water of excellent quality (180 ppm), providing a clear testimony to the superior performance of the conventional H₂SO₄+SHMP treatment over the advanced anti-scalant.

Original language	English
Pages (from-to)	189-198
Number of pages	10
Journal	Desalination
Volume	103
Issue number	3
DOIs	https://doi.org/10.1016/0011-9164(95)00072-0
State	Published - Dec 1995

Bibliographical note

Funding Information:
This work was sponsored by King Abdulaziz City for Science and Technology (KACST), Riyadh. The authors wish to express their sincere thanks to KACST for its financial support of the Project #AR-10-055; KFUPM Research Institute for its manpower, administrative, and analytical support (PN 21084); and Messrs. Aveliro Caba-cungan and Khurshid Kamal of the Institute for their operation and maintenance of the RO pilot plant.

Keywords

Desalination
RO
Scale inhibitors
Scaling

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science
Water Science and Technology
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/0011-9164(95)00072-0

Cite this

@article{4672159505f04ff4930fd3dede48cab5,

title = "Pilot plant evaluation of advanced vs. conventional scale inhibitors for RO desalination",

abstract = "An advanced anti-scalant, consisting of a polyacrylate and hydroxyethylidene diphosphonate (HEDP), was tested against the conventional H2SO4 and sodium hexa-meta-phosphate (SHMP) inhibitors in a pilot plant which had parallel RO units. The two units were fitted with identical brackish hollow fine fiber (HFF) permeators arranged in a two-stage mode which received the same brackish feed water, and were operated at the same feed pressure (27.6 bar/400 psig) and product water recovery (70\%). Unit \#1 was treated 9 ppm of as-received advanced anti-scalant, and unit \#2 was treated with 6 ppm of SHMP and about 130 ppm of 98\% H2SO4. The pilot plant trial lasted for 3,000 h. The techno-economic evaluation of the two scale control treatments was carried out in terms of pumping energy, the anti-scalants consumed, and the quality and total output of the product water produced in 3,000 h. The pumping energy and scale control treatment costs (as \$/m3 of water produced) were same for the two treatments; but in terms of salt rejection, product TDS and output, performance of the advanced anti-scalant was inferior; after 3,000 h the salt rejection of unit \#1 (which operated on the advanced anti-scalant) was about 81\% vs. 94\% for unit \#2 (H2SO4+SHMP). Similarly, in 3,000 h unit \#1 produced 20\% less water of unacceptable quality (620 ppm) whereas unit \#2 produced more water of excellent quality (180 ppm), providing a clear testimony to the superior performance of the conventional H2SO4+SHMP treatment over the advanced anti-scalant.",

keywords = "Desalination, RO, Scale inhibitors, Scaling",

author = "Butt, \{F. H.\} and F. Rahman and U. Baduruthamal",

note = "Funding Information: This work was sponsored by King Abdulaziz City for Science and Technology (KACST), Riyadh. The authors wish to express their sincere thanks to KACST for its financial support of the Project \#AR-10-055; KFUPM Research Institute for its manpower, administrative, and analytical support (PN 21084); and Messrs. Aveliro Caba-cungan and Khurshid Kamal of the Institute for their operation and maintenance of the RO pilot plant.",

year = "1995",

month = dec,

doi = "10.1016/0011-9164(95)00072-0",

language = "English",

volume = "103",

pages = "189--198",

journal = "Desalination",

issn = "0011-9164",

number = "3",

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TY - JOUR

T1 - Pilot plant evaluation of advanced vs. conventional scale inhibitors for RO desalination

AU - Butt, F. H.

AU - Rahman, F.

AU - Baduruthamal, U.

N1 - Funding Information: This work was sponsored by King Abdulaziz City for Science and Technology (KACST), Riyadh. The authors wish to express their sincere thanks to KACST for its financial support of the Project #AR-10-055; KFUPM Research Institute for its manpower, administrative, and analytical support (PN 21084); and Messrs. Aveliro Caba-cungan and Khurshid Kamal of the Institute for their operation and maintenance of the RO pilot plant.

PY - 1995/12

Y1 - 1995/12

N2 - An advanced anti-scalant, consisting of a polyacrylate and hydroxyethylidene diphosphonate (HEDP), was tested against the conventional H2SO4 and sodium hexa-meta-phosphate (SHMP) inhibitors in a pilot plant which had parallel RO units. The two units were fitted with identical brackish hollow fine fiber (HFF) permeators arranged in a two-stage mode which received the same brackish feed water, and were operated at the same feed pressure (27.6 bar/400 psig) and product water recovery (70%). Unit #1 was treated 9 ppm of as-received advanced anti-scalant, and unit #2 was treated with 6 ppm of SHMP and about 130 ppm of 98% H2SO4. The pilot plant trial lasted for 3,000 h. The techno-economic evaluation of the two scale control treatments was carried out in terms of pumping energy, the anti-scalants consumed, and the quality and total output of the product water produced in 3,000 h. The pumping energy and scale control treatment costs (as $/m3 of water produced) were same for the two treatments; but in terms of salt rejection, product TDS and output, performance of the advanced anti-scalant was inferior; after 3,000 h the salt rejection of unit #1 (which operated on the advanced anti-scalant) was about 81% vs. 94% for unit #2 (H2SO4+SHMP). Similarly, in 3,000 h unit #1 produced 20% less water of unacceptable quality (620 ppm) whereas unit #2 produced more water of excellent quality (180 ppm), providing a clear testimony to the superior performance of the conventional H2SO4+SHMP treatment over the advanced anti-scalant.

AB - An advanced anti-scalant, consisting of a polyacrylate and hydroxyethylidene diphosphonate (HEDP), was tested against the conventional H2SO4 and sodium hexa-meta-phosphate (SHMP) inhibitors in a pilot plant which had parallel RO units. The two units were fitted with identical brackish hollow fine fiber (HFF) permeators arranged in a two-stage mode which received the same brackish feed water, and were operated at the same feed pressure (27.6 bar/400 psig) and product water recovery (70%). Unit #1 was treated 9 ppm of as-received advanced anti-scalant, and unit #2 was treated with 6 ppm of SHMP and about 130 ppm of 98% H2SO4. The pilot plant trial lasted for 3,000 h. The techno-economic evaluation of the two scale control treatments was carried out in terms of pumping energy, the anti-scalants consumed, and the quality and total output of the product water produced in 3,000 h. The pumping energy and scale control treatment costs (as $/m3 of water produced) were same for the two treatments; but in terms of salt rejection, product TDS and output, performance of the advanced anti-scalant was inferior; after 3,000 h the salt rejection of unit #1 (which operated on the advanced anti-scalant) was about 81% vs. 94% for unit #2 (H2SO4+SHMP). Similarly, in 3,000 h unit #1 produced 20% less water of unacceptable quality (620 ppm) whereas unit #2 produced more water of excellent quality (180 ppm), providing a clear testimony to the superior performance of the conventional H2SO4+SHMP treatment over the advanced anti-scalant.

KW - Desalination

KW - RO

KW - Scale inhibitors

KW - Scaling

UR - https://www.scopus.com/pages/publications/0029412758

U2 - 10.1016/0011-9164(95)00072-0

DO - 10.1016/0011-9164(95)00072-0

M3 - Article

AN - SCOPUS:0029412758

SN - 0011-9164

VL - 103

SP - 189

EP - 198

JO - Desalination

JF - Desalination

IS - 3

ER -

Pilot plant evaluation of advanced vs. conventional scale inhibitors for RO desalination

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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