Algal treatment of pulp and paper industry wastewaters in SBR systems

Highly colored and highly polluted pulp and paper industry wastewaters are proposed to be treated by using algae in sequential batch reactors (SBR). Results of batch studies revealed that up to 74% COD; 74% color removal could be attained in about 40 days of incubation, From the preliminary SBR experiments, filling period was found to be a critical step affecting the overall efficiency when mixing and aeration is applied during filling. Therefore, 5 different filling periods (4, 6, 8, 10 and 12 days) were studied with a total SBR cycle of 15 days. For all filling periods; COD, color and AOX removal efficiencies increased with increasing filling time. Maximum removal efficiencies achieved were 60 to 85% for COD, 42 to 75% for color and 82 to 93% for AOX for the filling periods of 4 to 12 days. For 8 days or longer filling periods, no additional reaction time was required. Results showed that, organics in the wastewater were both chlorinated and non-chlorinated; algae removed these mainly by metabolism; and chlorine cleavage from chlorinated organic molecules was more rapid than the degradation of non-chlorinated and colored organics. Adsorbed lignin on algal biomass was found to be varying between 10-20% depending on filling period applied.


Effectiveness of algae in the treatment of a wood-based pulp and paper industry wastewater
Tarlan, Esra; Dilek, Filiz Bengü; Yetiş, Ülkü (2002-04-27)
In this study, the ability of algae to treat a wood-based pulp and paper industry wastewater was investigated. Tests were performed in batch reactors seeded with a mixed culture of algae. Under different lighting and initial wastewater strength conditions, changes in COD, AOX and color contents of reactors were followed with time. Algae were found to remove up to 58% of COD, 84% of color and 80% of AOX from pulp and paper industry wastewaters. No remarkable differences were observed in COD and color when li...
Homogeneous and heterogeneous catalytic ozonation of pulp bleaching effluent
Balcioglu, Isil Akmehmet; Moral, Cigdem Kivilcimndan (2008-08-31)
Catalytic ozonation is a promising treatment method for both water and wastewater. In this study, in order to increase the biodegradability of bleaching wastewater from an integrated pulp- and -paper production plant, granulated activated carbon-(GAC), iron-(Fe2+) and manganese-(Mn2+) ion-catalyzed ozonation processes were used as a pre-treatment process. The effects of the catalyst concentration and the initial pH (pH(i)) of wastewater on the treatment efficiency of processes were investigated. Although me...
Nitrite and nitrate removal efficiencies of soil aquifer treatment columns
Güngör, Kerem; Ünlü, Kahraman (2005-05-20)
Bench-scale soil column experiments were performed to examine the effects of soil type and infiltration conditions on the removal efficiencies of wastewater nitrites and nitrates during the biological ripening phase of soil aquifer treatment (SAT) columns. SAT was simulated in three 1-m-high soil columns packed with 3 different natural agricultural soils having sandy clay loam (SCL), loamy sand (LS) and sandy loam (SL) textures. All columns were equipped with tensiometers and soil-water sampling ports, and ...
CO2 mitigation from the flue gas of the iron steel making industry by microalgal cultures
Çaylı, Direniş; Bayramoğlu, Tuba Hande; Demirer, Göksel Niyazi; Uludağ Demirer, Sibel (null; 2015-06-15)
Integration of CO2 mitigation with nutrient removal from different wastewater sources can be realized by microalgae growth. In spite of being an option with significant environmental benefits, this technology still suffers from achieving high performances since atmospheric concentration of CO2 limits microalgae growth; i.e. biomass accumulation. This is why the use of flue gas with CO2 concentrations of 20-25% (by volume) should be considered as an inorganic C source for the microalgae culture reactors. Thi...
Biodegradable Elastomeric Networks: Highly Efficient Cross-Linking of Poly(trimethylene carbonate) by Gamma Irradiation in the Presence of Pentaerythritol Triacrylate
Bat, Erhan; Grijpma, Dirk W. (2010-10-01)
Biodegradable elastomeric poly(trimethylene carbonate) (PTMC) networks were efficiently formed by gamma irradiating the linear polymer in the presence of pentaerythritol triacrylate (PETA). The properties of networks formed upon irradiation of PTMC films containing (0.1.5 wt %.) PETA as cross-linking aid were evaluated. The gel contents and network densities increased with increasing PETA contents, irradiation dose, and initial polymer molecular weight. At a dose of 25 kGy, networks with gel fractions up to...
Citation Formats
E. Tarlan, Ü. Yetiş, and F. B. Dilek, “Algal treatment of pulp and paper industry wastewaters in SBR systems,” WATER SCIENCE AND TECHNOLOGY, pp. 151–158, 2002, Accessed: 00, 2020. [Online]. Available: