Combining activated sludge process with membrane separation to obtain recyclable quality water from paper mill effluent

Sudheer Kumar Shukla, Vivek Kumar, Tuan Van Doan, Keunje Yoo, Younkyung Kim, Joonhong Park

Research output: Contribution to journalArticle

Abstract

Abstract The present study was carried out for the treatment of paper mill effluent using combination of activated sludge process and membrane separation. An integrated paper mill employing OCEOPHH sequence (oxidation, chlorination, alkali extraction re-enforced by oxygen and peroxide, hypo-1, and hypo-2) for the bleaching of hardwood pulp was selected for the study. The purpose of this work was to examine the water quality and membrane performance when combining activated sludge process with different membrane separation processes in series. Pollutant removal including adsorbable organic halides (AOX) was compared among different treatment combinations; (i) ASP + microfiltration (MF), (ii) ASP +MF + ultrafiltration (UF), (iii) ASP +MF + UF + nanofiltration (NF), and (iv) ASP +MF + UF + NF + reverse osmosis (RO) to select the optimal treatment scheme for water recycling in the paper mill. Different initial inlet pressures were used for the UF and NF (6.8, 10.3, and 13.7 bar) and for RO (10.3, 13.7, and 17.2) The retentate from each membrane was recycled back to the feed and retreated until the inlet pressure increased to the maximum cut-off pressure for each membrane. After separation, 100 % total suspended solids, total dissolved solids, color removal and 94.2 % chemical oxygen demand, and 86 % AOX removal was observed. This study suggests the potential application of the combination of membrane separation with activated sludge process for recycling water in the paper industry.

Original languageEnglish
Article number836
Pages (from-to)781-788
Number of pages8
JournalClean Technologies and Environmental Policy
Volume17
Issue number3
DOIs
Publication statusPublished - 2015 Mar 18

Fingerprint

Activated sludge process
Water quality
activated sludge
Effluents
mill
Microfiltration
Ultrafiltration
effluent
membrane
ultrafiltration
Membranes
water quality
Nanofiltration
Water recycling
Reverse osmosis
recycling
Color removal (water treatment)
pollutant removal
halide
Hardwoods

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Management, Monitoring, Policy and Law

Cite this

Shukla, Sudheer Kumar ; Kumar, Vivek ; Van Doan, Tuan ; Yoo, Keunje ; Kim, Younkyung ; Park, Joonhong. / Combining activated sludge process with membrane separation to obtain recyclable quality water from paper mill effluent. In: Clean Technologies and Environmental Policy. 2015 ; Vol. 17, No. 3. pp. 781-788.
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Combining activated sludge process with membrane separation to obtain recyclable quality water from paper mill effluent. / Shukla, Sudheer Kumar; Kumar, Vivek; Van Doan, Tuan; Yoo, Keunje; Kim, Younkyung; Park, Joonhong.

In: Clean Technologies and Environmental Policy, Vol. 17, No. 3, 836, 18.03.2015, p. 781-788.

Research output: Contribution to journalArticle

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AB - Abstract The present study was carried out for the treatment of paper mill effluent using combination of activated sludge process and membrane separation. An integrated paper mill employing OCEOPHH sequence (oxidation, chlorination, alkali extraction re-enforced by oxygen and peroxide, hypo-1, and hypo-2) for the bleaching of hardwood pulp was selected for the study. The purpose of this work was to examine the water quality and membrane performance when combining activated sludge process with different membrane separation processes in series. Pollutant removal including adsorbable organic halides (AOX) was compared among different treatment combinations; (i) ASP + microfiltration (MF), (ii) ASP +MF + ultrafiltration (UF), (iii) ASP +MF + UF + nanofiltration (NF), and (iv) ASP +MF + UF + NF + reverse osmosis (RO) to select the optimal treatment scheme for water recycling in the paper mill. Different initial inlet pressures were used for the UF and NF (6.8, 10.3, and 13.7 bar) and for RO (10.3, 13.7, and 17.2) The retentate from each membrane was recycled back to the feed and retreated until the inlet pressure increased to the maximum cut-off pressure for each membrane. After separation, 100 % total suspended solids, total dissolved solids, color removal and 94.2 % chemical oxygen demand, and 86 % AOX removal was observed. This study suggests the potential application of the combination of membrane separation with activated sludge process for recycling water in the paper industry.

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