Atık sulardaki ağır metal iyonlarının yeşil alglerden chlorella vulgaris`e biyosorbsiyonunun kesikli düzende karıştırmalı ve akışkan yatak tepkime kaplarında incelenmesi

Abstract

XXI SÜİÎ4ÂET The kinetics of biosorption cupper(II)- sine (II), iron(II)f chr©Eaiusi( VI ) and lead(II) ion® existing in wast® water to Ohlorella TulgariS;. a green ai.gs.8j was investigated in stir red batch tank and fluidised `bed reactors- Firstly <? growth parameters of microorganisa were obtained, followed by opti cas operating conditions0 investigations with, adsorption studies and kinetic parameters were determined. Opticas tesaperatıareş initial pH and initial glucose concen tration values for high growth yield of saioroorganissi were experienced as 25 0, 6-5-7-0 and 15-20 g/l respectively» ffiaz- iisum specific growth rat® of »sicroorganisia (u.^^), the satu ration concentration forthe.substrate (Ks) and.growth yield (Tt/S ) were determined as 0,057 hr``1, 1-47 g£-/I and 0-498 g so-/gC-- respsc timely- The effect of aeration end agitating rates on specific growth rate of microorganisms was observed to be siner- +2 2-t- ?+ 6-f 2-s- For adsorption studied of C*a ? En, Fe - Or and !?b ions in stirred batch tank reactors, optisrasa adsorption tem peratures and initial pE values for each ion were determined as 25°C- 35°0? 35°C, 35°C-50°C, 25°C and 4-0- 4-0, 1*5-2-0- 1,5-2-0 and 5»0 respectively- For sost setal ions-.initial Bietal ion concentrations of 200 sg/l gars the highest aâ«*- sorption rates- Corresponding Freundlich adsorption constants and adsorption degrees were found frois Freundlich adsorption isothera® optained at different tesperatures and pK values - Additionally, global and intrinsic reaction rate constants were calculated according to the assused adsorption rate sod- el* Sose parts of studies «?ere repeated in fluidised bed re actor and the results were compared ??ith each other- TheXV highest adsorption rates and metal uptake efficiencies of - ? -.. 2-s- algae were observed in the. adsorption of Pfe` ions and the slowest adsorption rates i?er® found for Pe~ ions- From the isotherms obtained at optimum, temperature and pE values^ the adsorption of Pb``* ions depicted the highest adsorption ca- 2-4- pssitj while the greatest adsorption degree was for Cu~ ions» The effect of metal ions on the specific growth rate of mi croorganism was also searched toy adding every metal' ion as 25 snd 50 mg/1 cone entrat ions into the growth medium of mi croorganism- It was found that chrosdu.m(`fI) ions had a cer tain.inhibition effect on microorganism® s growth and others decreased the specific growth rate-, respectively- During exponential growth ? little assonant of zinc (II) ion was ad sorbed toy algas. In the last part of the studies- waste water samples in different compositions containing different metal ions.were prepared and the adsorption selectivity of metal ions toy C -vulgaris was experimented^ If the opticus operating pH values of metal ions were equal- tooth of them were adsorbed - But if different,, the microorganism -s?&s selective in adsorp tion according to the first pH adjustment-

XXI SÜİÎ4ÂET The kinetics of biosorption cupper(II)- sine (II), iron(II)f chr©Eaiusi( VI ) and lead(II) ion® existing in wast® water to Ohlorella TulgariS;. a green ai.gs.8j was investigated in stir red batch tank and fluidised `bed reactors- Firstly <? growth parameters of microorganisa were obtained, followed by opti cas operating conditions0 investigations with, adsorption studies and kinetic parameters were determined. Opticas tesaperatıareş initial pH and initial glucose concen tration values for high growth yield of saioroorganissi were experienced as 25 0, 6-5-7-0 and 15-20 g/l respectively» ffiaz- iisum specific growth rat® of »sicroorganisia (u.^^), the satu ration concentration forthe.substrate (Ks) and.growth yield (Tt/S ) were determined as 0,057 hr``1, 1-47 g£-/I and 0-498 g so-/gC-- respsc timely- The effect of aeration end agitating rates on specific growth rate of microorganisms was observed to be siner- +2 2-t- ?+ 6-f 2-s- For adsorption studied of C*a ? En, Fe - Or and !?b ions in stirred batch tank reactors, optisrasa adsorption tem peratures and initial pE values for each ion were determined as 25°C- 35°0? 35°C, 35°C-50°C, 25°C and 4-0- 4-0, 1*5-2-0- 1,5-2-0 and 5»0 respectively- For sost setal ions-.initial Bietal ion concentrations of 200 sg/l gars the highest aâ«*- sorption rates- Corresponding Freundlich adsorption constants and adsorption degrees were found frois Freundlich adsorption isothera® optained at different tesperatures and pK values - Additionally, global and intrinsic reaction rate constants were calculated according to the assused adsorption rate sod- el* Sose parts of studies «?ere repeated in fluidised bed re actor and the results were compared ??ith each other- TheXV highest adsorption rates and metal uptake efficiencies of - ? -.. 2-s- algae were observed in the. adsorption of Pfe` ions and the slowest adsorption rates i?er® found for Pe~ ions- From the isotherms obtained at optimum, temperature and pE values^ the adsorption of Pb``* ions depicted the highest adsorption ca- 2-4- pssitj while the greatest adsorption degree was for Cu~ ions» The effect of metal ions on the specific growth rate of mi croorganism was also searched toy adding every metal' ion as 25 snd 50 mg/1 cone entrat ions into the growth medium of mi croorganism- It was found that chrosdu.m(`fI) ions had a cer tain.inhibition effect on microorganism® s growth and others decreased the specific growth rate-, respectively- During exponential growth ? little assonant of zinc (II) ion was ad sorbed toy algas. In the last part of the studies- waste water samples in different compositions containing different metal ions.were prepared and the adsorption selectivity of metal ions toy C -vulgaris was experimented^ If the opticus operating pH values of metal ions were equal- tooth of them were adsorbed - But if different,, the microorganism -s?&s selective in adsorp tion according to the first pH adjustment-