[Front and back cover]

The following topics are dealt with: soil contamination; activated sludge mixed liquor; sustainable hydrogen production; anion exchange mixed matrix membrane chromatography; Bacillus subtilis culture; petroleum sludge solidification; renewable energy; natural fiber composite; photocatalysis; photochemical oxidation; gas-phase propylene polymerization; agricultural waste; drinking water treatment; biological activated carbon filter process; heterogeneous catalyst; heat loss; environmental friendly concrete; aerobic denitrifier; UV-irradiation; agricultural biomass; crude jatropha oil; biodiesel production; sewage sludge; chemical industry effluent; tanning waste water treatment; granular sludge bed; nitrate polluted groundwater; marine oil facilities; and Hungarian horticulture.