- Title
- Fixation of carbon dioxide and optimization of liming process waste produced in tanneries using response surface methodology
- Creator
- Venkatakrishnan, B.; Sandhya, K. V.; Abinandan, S.; Vedaraman, N.; Velappan, K. C.
- Relation
- Journal of Cleaner Production Vol. 209, Issue 1 February 2019, p. 855-861
- Publisher Link
- http://dx.doi.org/10.1016/j.jclepro.2018.10.275
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2019
- Description
- Tanning process generates a significant amount of waste matter both in solid and liquid form. The present study depicts an innovative approach to reduce pollutant and recover calcite (CaCO₃) from the liming process waste by carbon dioxide (CO₂) fixation. Response surface optimization was applied to study the effect of time and lime concentration (2.5%-7.5% w/w) in synthetic wastewater using CO₂. The acquired optimized condition was verified on real solid waste produced viz., lime sludge product (LSP) and relime sludge product (RSP). The results indicated rover >95% of calcite (CaCO₃) recovery from synthetic lime wastewater followed by 85-90% from LSP & RSP under optimized conditions. Subsequent reduction of total dissolved solids and suspended solids in the range of 78-82% and 76-77% in LSP & RSP was also observed. Mineralogical analysis using X-ray diffraction technique along with standards (lime, calcite, lime & calcite mix) confirms the production of calcite. Statistical analysis showed a P value < 0.05 indicating a higher degree of correlation (R₂ > 0.95) among the process conditions and variables using response surface methodology and was further validated using artificial neural networking. This study demonstrates a sustainable and cleaner way of resource recovery from waste through CO₂ fixation from lime solid waste (sludge).
- Subject
- carbonation; resource recovery; solid waste; sustainable management; wastewater treatment; SDG 6; SDG 11; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1445393
- Identifier
- uon:42576
- Identifier
- ISSN:0959-6526
- Language
- eng
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Goal 6: Clean Water and Sanitation
Goal 11: Sustainable Cities and Communities
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