Phosphorus removal by application of natural and semi-natural materials for possible recovery according to assumptions of circular economy and closed circuit of P.

摘要: Abstract In the last few years idea of circular economy has become essential. Thus, designing methods nutrients removal should be based on using materials that make it possible to recover those nutrients. Recently, applied in wastewater treatment plants cannot provide optimal results; moreover, application commercial coagulants like ferric chloride and polyaluminum can cause difficulties potential recovery phosphorus from sludge. Sorption materials, both natural modified, are appearing as successful for treatment, especially wetland effluent. To pursue principles, capacity waste needs tested with regard removal. If addition a possibility them appears, will close circuit. The aim investigation, according HELCOM EU Water Framework Directive recommendations, was explore ensuring good stable quality effluent by phosphorous minimum energy material consumption. objective determine sorption two selected (waste chemically modified material) steady conditions. research focused also time mixing, period sedimentation absorbent influence used basic parameters solution: pH, temperature, total suspended solids, conductivity, turbidity, color. M1 after thermal carbonate-siliceous rock temperature above 700 °C (Rockfos®). Material M2 lanthanum-modified bentonite, anthropogenic origin. Both have shown high ability reduce phosphates concentration synthetic wastewater. were 45.6 mg/g 5.6 mg/g, respectively.