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Comparative Study of Different Media in the Treatment of Sago Wastewater Using HUASB Reactor


Affiliations
1 Department of Civil Engineering, Government College of Technology, Coimbatore-641 013, T. N., India
2 Department of Civil Engineering, Karpagam University, Coimbatore-641 013, T. N., India
3 Tamilnadu Water Supply and Drainage Board, TWAD Board, Coimbatore-641 013, T. N., India
4 Department of Environmental Engineering, Government College of Technology, Coimbatore-641 013, T. N., India
 

Processing of sago generates enormous quantities of high strength wastewater requiring systematic treatment prior to disposal. The present study is an attempt to compare the three media such as polypropylene ring, rosette filter and PVC carrier, in the treatment of sago wastewater using Hybrid Upflow Anaerobic Sludge Blanket (HUASB) reactor. Three HUASB reactors each with a volume of about 4.7 L and effective volume of 4.2 L was operated and packed with the above three media separately in each reactor along with the effective microorganisms (EM) solution added in 1:1000 ratio of reactor volume. The initial OLR (Organic Loading Rate) range was about 0.75 kg.COD/m3.day and further increased. Various effluent characteristics like pH, COD, total suspended solids (TSS), VFA, alkalinity and biogas production were studied until the attainment of steady state. The pH of treated effluent during steady state condition was almost neutral for all the three reactors even though the influent had an acidic pH. The optimum HRT was found to be 10h for both polypropylene media and PVC carrier media and 8h for rosette filter media. The maximum COD and TSS removal efficiencies for the reactor packed with polypropylene were as high as 88% and 77% in HUASB reactor in the presence of effective microorganisms with an OLR of 9 kg.COD/m3.day. And for the reactor packed with rosette filter, the maximum COD and TSS removal efficiencies were 84% and 76% in HUASB reactor in the presence of effective microorganisms with an OLR of 9 kg.COD/m3.day. Similarly, for the reactor packed with PVC carrier media, the maximum COD and TSS removal efficiencies were 86% and 78% in HUASB reactor in the presence of effective microorganisms with an OLR of 9 kg.COD/ m3.day. The maximum gas production for these three reactors packed with polypropylene ring, rosette filter and PVC carrier media were 2.8 L/d, 0.66 L/d and 1.7 L/d respectively in the presence of effective microorganisms. It is found that from an overall assessment, the HUASB reactor packed with polypropylene ring has proved superior in its performance compared to the HUASB reactor with other packing media.

Keywords

Sago Wastewater, Rosette Filter, Hybrid UASB, Biogas.
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  • Comparative Study of Different Media in the Treatment of Sago Wastewater Using HUASB Reactor

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Authors

N. Balasundaram
Department of Civil Engineering, Government College of Technology, Coimbatore-641 013, T. N., India
T. Meenambal
Department of Civil Engineering, Karpagam University, Coimbatore-641 013, T. N., India
N. Balasubramanium
Tamilnadu Water Supply and Drainage Board, TWAD Board, Coimbatore-641 013, T. N., India
R. Loganath
Department of Environmental Engineering, Government College of Technology, Coimbatore-641 013, T. N., India

Abstract


Processing of sago generates enormous quantities of high strength wastewater requiring systematic treatment prior to disposal. The present study is an attempt to compare the three media such as polypropylene ring, rosette filter and PVC carrier, in the treatment of sago wastewater using Hybrid Upflow Anaerobic Sludge Blanket (HUASB) reactor. Three HUASB reactors each with a volume of about 4.7 L and effective volume of 4.2 L was operated and packed with the above three media separately in each reactor along with the effective microorganisms (EM) solution added in 1:1000 ratio of reactor volume. The initial OLR (Organic Loading Rate) range was about 0.75 kg.COD/m3.day and further increased. Various effluent characteristics like pH, COD, total suspended solids (TSS), VFA, alkalinity and biogas production were studied until the attainment of steady state. The pH of treated effluent during steady state condition was almost neutral for all the three reactors even though the influent had an acidic pH. The optimum HRT was found to be 10h for both polypropylene media and PVC carrier media and 8h for rosette filter media. The maximum COD and TSS removal efficiencies for the reactor packed with polypropylene were as high as 88% and 77% in HUASB reactor in the presence of effective microorganisms with an OLR of 9 kg.COD/m3.day. And for the reactor packed with rosette filter, the maximum COD and TSS removal efficiencies were 84% and 76% in HUASB reactor in the presence of effective microorganisms with an OLR of 9 kg.COD/m3.day. Similarly, for the reactor packed with PVC carrier media, the maximum COD and TSS removal efficiencies were 86% and 78% in HUASB reactor in the presence of effective microorganisms with an OLR of 9 kg.COD/ m3.day. The maximum gas production for these three reactors packed with polypropylene ring, rosette filter and PVC carrier media were 2.8 L/d, 0.66 L/d and 1.7 L/d respectively in the presence of effective microorganisms. It is found that from an overall assessment, the HUASB reactor packed with polypropylene ring has proved superior in its performance compared to the HUASB reactor with other packing media.

Keywords


Sago Wastewater, Rosette Filter, Hybrid UASB, Biogas.