ORIGINAL RESEARCH
Biogas Synthesis from Leather Industry Solid
Waste in Pakistan
| 1 | College of Earth and Environmental Sciences, University of the Punjab, Lahore, Pakistan |
| 2 | Sustainable Development Study Centre, Government College University Lahore, Pakistan |
| 3 | Senior Superintendent Garden, University of the Punjab, Lahore, Pakistan |
CORRESPONDING AUTHOR
Waheed Ullah Khan
College of Earth and Environmental Sciences, University of the Punjab Lahore, Pakistan
College of Earth and Environmental Sciences, University of the Punjab Lahore, Pakistan
Submission date: 2019-01-08
Final revision date: 2019-06-17
Acceptance date: 2019-07-02
Online publication date: 2020-04-22
Publication date: 2020-06-08
Pol. J. Environ. Stud. 2020;29(5):3621–3628
KEYWORDS
TOPICS
ABSTRACT
About 80% of raw material of the leather industry ends up in waste, which poses a great problem
for waste management. During the current study, economical and ecofriendly techniques for conversion
of tannery waste into biogas were evaluated. Fats, shavings and dried sludge showed 50%, 65% and
61% organic content and 68%, 45% and 9.6% moisture content, respectively. Dried sludge, pre-tanning
waste (fats and shavings) and manure were digested either alone or in different combinations through
amber glass bottles. The temperature was maintained from 32ºC to 35ºC by insulating digesters with
sand at pH 6.8 to 7.5. The maximum amount of biogas (1623±26.1 ml/kg) was observed by digesting
equal proportions of manure and dried sludge. The results depicted that 473±9.19 ml of biogas was
biosynthesized from 1kg of sample comprising 25% pre-tanning waste and 75% manure.
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