Effect of pH adjustment, solid-liquid separation and chitosan adsorption on pollutants' removal from pot ale wastewaters

Davide Dionisi, Sarah Sine Bruce, Malcolm John Barraclough

Research output: Contribution to journalArticle

6 Citations (Scopus)
5 Downloads (Pure)

Abstract

Pot ale is a wastewater from the whisky industry which is produced in large volumes and causes significant environmental concern. This study investigates the degree of COD, phosphorus, ammonia and copper removal obtained from pot ale using solid–liquid separation, carried out in the range of pH values 3.4–9.0. This study also investigates the removal of the same pollutants, from the liquid phase after solid–liquid separation, obtained by adsorption on unmodified chitosan, in a range of pH values. By solid–liquid separation, a removal of up to 14% of the COD, 60% of free phosphate, 45% of total phosphorus, 65% of ammonia and >80% of copper was obtained. In general, the highest removal of the pollutants was observed at alkaline pH values. Adsorption with chitosan, at an initial pH of the wastewater equal to 5, allowed only a modest COD removal, up to 10%, and up to 35% removal of free phosphate. When the initial pH of the wastewater was adjusted to 7, no removal of COD and phosphorus was observed with chitosan, while adsorption at more acidic pH values was impossible due to formation of a thick paste with water. Adsorption capacity for COD and phosphorus correlated well with the final pH after chitosan addition, and it was shown to decrease sharply with increasing pH. Overall, this study shows that solid–liquid separation removes a significant fraction of the pollutants in pot ale, while chitosan might only be effective after chemical modifications (e.g. cross-linking) which improve its stability at acidic pH.
Original languageEnglish
Pages (from-to)1929-1936
Number of pages8
JournalJournal of Environmental Chemical Engineering
Volume2
Issue number4
Early online date23 Aug 2014
DOIs
Publication statusPublished - Dec 2014

Fingerprint

pollutant removal
adsorption
wastewater
liquid
phosphorus
pollutant
ammonia
phosphate
copper
removal
effect
pH-value
industry

Keywords

  • pot ale
  • whisky distilleries
  • solid-liquid separation
  • chitosan
  • wastewater treatment
  • physical-chemical treatment

Cite this

Effect of pH adjustment, solid-liquid separation and chitosan adsorption on pollutants' removal from pot ale wastewaters. / Dionisi, Davide; Bruce, Sarah Sine; Barraclough, Malcolm John.

In: Journal of Environmental Chemical Engineering, Vol. 2, No. 4, 12.2014, p. 1929-1936.

Research output: Contribution to journalArticle

@article{2854ccd95c934aa2ab580c4e6a337c55,
title = "Effect of pH adjustment, solid-liquid separation and chitosan adsorption on pollutants' removal from pot ale wastewaters",
abstract = "Pot ale is a wastewater from the whisky industry which is produced in large volumes and causes significant environmental concern. This study investigates the degree of COD, phosphorus, ammonia and copper removal obtained from pot ale using solid–liquid separation, carried out in the range of pH values 3.4–9.0. This study also investigates the removal of the same pollutants, from the liquid phase after solid–liquid separation, obtained by adsorption on unmodified chitosan, in a range of pH values. By solid–liquid separation, a removal of up to 14{\%} of the COD, 60{\%} of free phosphate, 45{\%} of total phosphorus, 65{\%} of ammonia and >80{\%} of copper was obtained. In general, the highest removal of the pollutants was observed at alkaline pH values. Adsorption with chitosan, at an initial pH of the wastewater equal to 5, allowed only a modest COD removal, up to 10{\%}, and up to 35{\%} removal of free phosphate. When the initial pH of the wastewater was adjusted to 7, no removal of COD and phosphorus was observed with chitosan, while adsorption at more acidic pH values was impossible due to formation of a thick paste with water. Adsorption capacity for COD and phosphorus correlated well with the final pH after chitosan addition, and it was shown to decrease sharply with increasing pH. Overall, this study shows that solid–liquid separation removes a significant fraction of the pollutants in pot ale, while chitosan might only be effective after chemical modifications (e.g. cross-linking) which improve its stability at acidic pH.",
keywords = "pot ale, whisky distilleries, solid-liquid separation, chitosan, wastewater treatment, physical-chemical treatment",
author = "Davide Dionisi and Bruce, {Sarah Sine} and Barraclough, {Malcolm John}",
note = "The authors acknowledge the financial support of the Energy Technology Partnership (ETP) under the ETP Consultancy Fund. The authors also acknowledge the skilful assistance of Mrs Liz Hendrie in performing the experiments.",
year = "2014",
month = "12",
doi = "10.1016/j.jece.2014.08.013",
language = "English",
volume = "2",
pages = "1929--1936",
journal = "Journal of Environmental Chemical Engineering",
issn = "2213-3437",
publisher = "Elsevier BV",
number = "4",

}

TY - JOUR

T1 - Effect of pH adjustment, solid-liquid separation and chitosan adsorption on pollutants' removal from pot ale wastewaters

AU - Dionisi, Davide

AU - Bruce, Sarah Sine

AU - Barraclough, Malcolm John

N1 - The authors acknowledge the financial support of the Energy Technology Partnership (ETP) under the ETP Consultancy Fund. The authors also acknowledge the skilful assistance of Mrs Liz Hendrie in performing the experiments.

PY - 2014/12

Y1 - 2014/12

N2 - Pot ale is a wastewater from the whisky industry which is produced in large volumes and causes significant environmental concern. This study investigates the degree of COD, phosphorus, ammonia and copper removal obtained from pot ale using solid–liquid separation, carried out in the range of pH values 3.4–9.0. This study also investigates the removal of the same pollutants, from the liquid phase after solid–liquid separation, obtained by adsorption on unmodified chitosan, in a range of pH values. By solid–liquid separation, a removal of up to 14% of the COD, 60% of free phosphate, 45% of total phosphorus, 65% of ammonia and >80% of copper was obtained. In general, the highest removal of the pollutants was observed at alkaline pH values. Adsorption with chitosan, at an initial pH of the wastewater equal to 5, allowed only a modest COD removal, up to 10%, and up to 35% removal of free phosphate. When the initial pH of the wastewater was adjusted to 7, no removal of COD and phosphorus was observed with chitosan, while adsorption at more acidic pH values was impossible due to formation of a thick paste with water. Adsorption capacity for COD and phosphorus correlated well with the final pH after chitosan addition, and it was shown to decrease sharply with increasing pH. Overall, this study shows that solid–liquid separation removes a significant fraction of the pollutants in pot ale, while chitosan might only be effective after chemical modifications (e.g. cross-linking) which improve its stability at acidic pH.

AB - Pot ale is a wastewater from the whisky industry which is produced in large volumes and causes significant environmental concern. This study investigates the degree of COD, phosphorus, ammonia and copper removal obtained from pot ale using solid–liquid separation, carried out in the range of pH values 3.4–9.0. This study also investigates the removal of the same pollutants, from the liquid phase after solid–liquid separation, obtained by adsorption on unmodified chitosan, in a range of pH values. By solid–liquid separation, a removal of up to 14% of the COD, 60% of free phosphate, 45% of total phosphorus, 65% of ammonia and >80% of copper was obtained. In general, the highest removal of the pollutants was observed at alkaline pH values. Adsorption with chitosan, at an initial pH of the wastewater equal to 5, allowed only a modest COD removal, up to 10%, and up to 35% removal of free phosphate. When the initial pH of the wastewater was adjusted to 7, no removal of COD and phosphorus was observed with chitosan, while adsorption at more acidic pH values was impossible due to formation of a thick paste with water. Adsorption capacity for COD and phosphorus correlated well with the final pH after chitosan addition, and it was shown to decrease sharply with increasing pH. Overall, this study shows that solid–liquid separation removes a significant fraction of the pollutants in pot ale, while chitosan might only be effective after chemical modifications (e.g. cross-linking) which improve its stability at acidic pH.

KW - pot ale

KW - whisky distilleries

KW - solid-liquid separation

KW - chitosan

KW - wastewater treatment

KW - physical-chemical treatment

U2 - 10.1016/j.jece.2014.08.013

DO - 10.1016/j.jece.2014.08.013

M3 - Article

VL - 2

SP - 1929

EP - 1936

JO - Journal of Environmental Chemical Engineering

JF - Journal of Environmental Chemical Engineering

SN - 2213-3437

IS - 4

ER -