resource recovery - the extraction and utilization of materials and energy from the waste stream
• Odzyskiwanie zasobów

restoration - completion of a landfill site to allow planned after use
• Przystosowanie do dalszego wykorzystania

returned sludge - settled activated sludge returned to mix with incoming raw or primary settled wastewater
• Osad zawracany

reuse - the direct use ( without separation or other treatment ) of a waste
• Ponowne użycie

reverse osmosis - separation of a solution by causing the solvent to flow through a semi-permeable membrane at pressures higher than the normal osmotic pressure.
• Osmoza odwrócona

riddlings - the fine ash that falls between furnace grate sections and through air passages in the grate
• Odsiew

ringelmann charts (UK) - a series of four charts of graduated shades from white to black for assessing the dark-ness of a plume of smoke by visual comparison
• Skala Ringelmanna

riparian rights - rights of the landowner to water on, or bordering, his property; they include the right to pre-vent upstream water from being diverted or misused
• Prawa właściciela gruntu

risk assessment - the qualitative and quantitative evaluation performed in an effort to define the risk posed to human health and/or the ...