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Biogas Recovery from Refinery Oily Sludge by Co-Digestion Followed by Sustainable Approach for Recycling the Residual Digestate in Concrete Mixes

Jasim Hassan S., Ismail Zainab Z.

Advances in Science and Technology. Research Journal

2022

Vol. 16, no 5

178--191

This study investigated the potential of biogas recovery from refinery oily sludge (ROS) inoculated with animals’ manure by co-digestion of in lab-scale biodigesters at mesophilic conditions. Cow dung (CD), cattle manure (CM), and poultry manure (PM) were utilized as co-substrates. The biogas production from the co-digestion process exceeds its production from uninoculated ROS by approximately 67.5 %, 22.13% and 21.6% for PM, CM, and CD, respectively. Kinetics of the co-digestion process was well described by the modified Gompertz model. The predicted and experimental values of biogas production were well fitted with R2 > 0.96, suggesting favorable conditions of the digestion process. New approach for recycling the residual digestate to replace freshwater in concrete mixes was carried out. Results of examining the mechanical properties of the residual digestate-modified concrete mixes demonstrated a potential sustainable approach for the disposal of residual digestate in concrete mixes.

The Reclamation of a Municipal Waste Landfill - Grudziądz Case Study

Majewski Kamil Artur

Civil and Environmental Engineering Reports

2021

Vol. 31, no. 1

106--117

Municipal landfills are one of the most human-transformed areas of nature, and the process of designing and building a landfill is one of the most difficult strategic issues within human clusters, in particular due to the requirements that a landfill should meet, including the method of its establishment and closure. The main aim of the article is to present a case study of one, currently reclaimed landfill, located in Grudziądz - a district town in the Kujawsko-Pomorskie Province - at Rataja Street, which was closed down in 1997. The discussion of this case was, in turn, an answer to the question about one of the possible methods of landfill reclamation. The article is based on the results of the author's own research - both in terms of field work and archive searches. The discussion of this case served to illustrate how the reclamation was carried out, what technologies of biogas recovery were used and what the results of the checks were.

Processing of sewage sludge with energy recovery in a wastewater treatment plant

Sadecka Z., Weiss E., Myszograj S.

Environment Protection Engineering

2012

Vol. 38, nr 3

97--105

Sewage sludge management in wastewater treatment plants is an important and very current issue. The paper presents an example of a well-resolved technological process of re-use and management of sewage sludge according to operating data from the Gubin-Guben wastewater treatment plant. The sewage sludge is subjected to methane fermentation process with biogas recovery. Electricity obtained from the biogas at 55%, and the produced heat in 100% covers the treatment plant energy demand. Physicochemical and bacteriological parameters of stabilized sludges indicate the possibility of their use in natural and agricultural area.