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Complex Technology of Sewage Purification from Heavy-Metal Ions by Natural Adsorbents and Utilization of Sewage Sludge

Zasidko Iryna, Polutrenko Myroslava, Mandryk Oleg, Stakhmych Yuliia, Petroshchuk Nataliia

Journal of Ecological Engineering

2019

Vol. 20, nr 5

209--216

The aspects of complex technology of sewage purification and utilization of purification sludge were investigated in the article. The authors substantiated the possibility of purifying sewage from heavy-metal ions by means of zeolite and utilizing sewage sludge in bricks production. The adsorption capacity of the zeolite from Sokyrnytsia deposit was studied for cupric and manganese ions in relation to its fractional composition. The comparative effectiveness studies of heavy metals adsorption by natural zeolite and anthracite were carried out. The optimal sorption parameters of these ions were selected based on the investigation results of their adsorption dynamics in the Cu2+ and Mn2+ solutions. The prospects of sewage sludge utilization by means of its thermal pyrolysis at the temperatures of 600-700°С were studied. The modifying additive was obtained, which can be added to the ceramic mixture and increase the porosity, reduce the density and decrease the thermal conductivity of course solid bricks.

Experimental study of thermal pyrolysis of turkey feathers

Kardaś D., Kluska J., Szuszkiewicz J., Szumowski M.

Technical Sciences / University of Warmia and Mazury in Olsztyn

2015

nr 18(2)

115-124

The analysis of chemical composition of turkey feathers reveals over 50% mass content of carbon. Unfortunately, the feathers contain also over 13% by weight of nitrogen and over 2.5% of sulfur. The significant presence of nitrogen and sulfur in turkey feathers indicates potential danger to the environment. The experiments of thermal pyrolysis of turkey feathers were done from a perspective of energy production potential out of gaseous products. The products of thermal pyrolysis were mainly gas and liquid. The calorific value of pyrolysed feathers is comparable with the one of hard carbon. It gets higher for higher temperatures. The calorific value of gaseous products of turkey feathers at 850oC was maximum and it equalled 16.7 MJ/Nm3.