Usage of UASB Reactor to Assess Feasibility of Treatment of Paper Mill Effluent
Upflow anaerobic sludge blanket (UASB) reactors R-I and R-II, each with an effective volume of 6.0 l were used to study the treatability of actual effluent obtained from paper mills at a mesophilic temperature and neutral pH. Methanol, as a source of an easily biodegradable substance along with acti...
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| Format: | Article |
| Language: | English |
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Universiti Brunei Darussalam
2011-11-01
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| Series: | ASEAN Journal on Science and Technology for Development |
| Subjects: | |
| Online Access: | http://www.ajstd.org/index.php/ajstd/article/view/37 |
| _version_ | 1797331385125437440 |
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| author | A Arshad N.H Hashim N Ghazala |
| author_facet | A Arshad N.H Hashim N Ghazala |
| author_sort | A Arshad |
| collection | DOAJ |
| description | Upflow anaerobic sludge blanket (UASB) reactors R-I and R-II, each with an effective volume of 6.0 l were used to study the treatability of actual effluent obtained from paper mills at a mesophilic temperature and neutral pH. Methanol, as a source of an easily biodegradable substance along with activated carbon of effective size 1.5 mm–2.5 mm were added to the reactor R-I to a total depth of 12 cm to evaluate its efficiency. The pH of both the reactors were kept constant at neutral by adding an external buffer solution of 0.03 M NaHCO3 with the feed solution. It was observed that corresponding to an organic loading rate of 3.5 kg-COD/m3-day, the overall chemical oxygen demand (COD) removal efficiency of the reactors R-I and R-II were 88% and 64%, respectively. The absorbable organic halides removal efficiency was observed to be 72% and 47% for reactor
R-I and R-II, respectively. During the study it was however observed that, the treatability efficiency of reactor R-I was comparatively better but the amount of its biogas production was slightly lower than that of R-II. The average biogas production in reactors R-I and R-II during the course of study was observed as 0.33 l/g-CODremoved and 0.42 l/g-CODremoved respectively, with a mean methane composition of 58%–61% in both the reactors. Kinetic coefficients of k, Ks, Y and kd were determined to be 0.7 g-TOC/g-VSS.d, 0.30 g-TOC/l, 0.26 g-VSS/g-TOC and 0.02 day–1 respectively, based on the results obtained from reactor R-I. The results of this study showed that the use of methanol and
an activated carbon in a UASB reactor to anaerobically digest the paper mills effluent at a mesophilic temperature and a neutral pH reactor was quite a feasible and viable technique. |
| first_indexed | 2024-03-08T07:34:48Z |
| format | Article |
| id | doaj.art-fa3f6601e3494aa59ae07e0c7ceb583b |
| institution | Directory Open Access Journal |
| issn | 0217-5460 2224-9028 |
| language | English |
| last_indexed | 2024-03-08T07:34:48Z |
| publishDate | 2011-11-01 |
| publisher | Universiti Brunei Darussalam |
| record_format | Article |
| series | ASEAN Journal on Science and Technology for Development |
| spelling | doaj.art-fa3f6601e3494aa59ae07e0c7ceb583b2024-02-02T19:40:50ZengUniversiti Brunei DarussalamASEAN Journal on Science and Technology for Development0217-54602224-90282011-11-0128210311410.29037/ajstd.3737Usage of UASB Reactor to Assess Feasibility of Treatment of Paper Mill EffluentA Arshad0N.H Hashim1N Ghazala21National University of Sciences and Technology (NUST), Islamabad, (MCE Risalpur)2Department of Civil and Environmental Engineering, UET Taxila3Fazia Degree College, Risalpur CanttUpflow anaerobic sludge blanket (UASB) reactors R-I and R-II, each with an effective volume of 6.0 l were used to study the treatability of actual effluent obtained from paper mills at a mesophilic temperature and neutral pH. Methanol, as a source of an easily biodegradable substance along with activated carbon of effective size 1.5 mm–2.5 mm were added to the reactor R-I to a total depth of 12 cm to evaluate its efficiency. The pH of both the reactors were kept constant at neutral by adding an external buffer solution of 0.03 M NaHCO3 with the feed solution. It was observed that corresponding to an organic loading rate of 3.5 kg-COD/m3-day, the overall chemical oxygen demand (COD) removal efficiency of the reactors R-I and R-II were 88% and 64%, respectively. The absorbable organic halides removal efficiency was observed to be 72% and 47% for reactor R-I and R-II, respectively. During the study it was however observed that, the treatability efficiency of reactor R-I was comparatively better but the amount of its biogas production was slightly lower than that of R-II. The average biogas production in reactors R-I and R-II during the course of study was observed as 0.33 l/g-CODremoved and 0.42 l/g-CODremoved respectively, with a mean methane composition of 58%–61% in both the reactors. Kinetic coefficients of k, Ks, Y and kd were determined to be 0.7 g-TOC/g-VSS.d, 0.30 g-TOC/l, 0.26 g-VSS/g-TOC and 0.02 day–1 respectively, based on the results obtained from reactor R-I. The results of this study showed that the use of methanol and an activated carbon in a UASB reactor to anaerobically digest the paper mills effluent at a mesophilic temperature and a neutral pH reactor was quite a feasible and viable technique.http://www.ajstd.org/index.php/ajstd/article/view/37anaerobic digestionactivated carbonmethanolCODAOXorganic loading ratedesignparameters, pulping processremoval efficiency |
| spellingShingle | A Arshad N.H Hashim N Ghazala Usage of UASB Reactor to Assess Feasibility of Treatment of Paper Mill Effluent ASEAN Journal on Science and Technology for Development anaerobic digestion activated carbon methanol COD AOX organic loading rate design parameters, pulping process removal efficiency |
| title | Usage of UASB Reactor to Assess Feasibility of Treatment of Paper Mill Effluent |
| title_full | Usage of UASB Reactor to Assess Feasibility of Treatment of Paper Mill Effluent |
| title_fullStr | Usage of UASB Reactor to Assess Feasibility of Treatment of Paper Mill Effluent |
| title_full_unstemmed | Usage of UASB Reactor to Assess Feasibility of Treatment of Paper Mill Effluent |
| title_short | Usage of UASB Reactor to Assess Feasibility of Treatment of Paper Mill Effluent |
| title_sort | usage of uasb reactor to assess feasibility of treatment of paper mill effluent |
| topic | anaerobic digestion activated carbon methanol COD AOX organic loading rate design parameters, pulping process removal efficiency |
| url | http://www.ajstd.org/index.php/ajstd/article/view/37 |
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