Tags

Type your tag names separated by a space and hit enter

Ferrrate(VI) and freeze-thaw treatment for oxidation of hormones and inactivation of fecal coliforms in sludge.
Water Sci Technol. 2017 Apr; 75(7-8):1625-1632.WS

Abstract

This study examined the individual and combined effects of potassium ferrate(VI) additions and freeze-thaw conditioning for the treatment and dewatering of wastewater sludge in cold climates, with particular focus on the inactivation of fecal coliforms and oxidation of estrogens, androgens, and progestogens. The first phase of the study evaluated the effects of potassium ferrate(VI) pre-treatment followed by freeze-thaw at -20 °C using a low (0.5 g/L) and high (5.0 g/L) dose of potassium ferrate(VI). The results showed that pre-treatment of anaerobically digested sludge with 5 g/L of potassium ferrate(VI) reduced the concentration of fecal coliforms in the sludge cake to below 100 MPN/g DS. The second phase evaluated the ability of ferrate(VI) to oxidise selected hormones in sludge. Anaerobically digested sludge samples were spiked with 10 different hormones: estrone (E1), 17α-estradiol, 17β-estradiol (E2), estriol (E3), 17α-ethinylestradiol (EE2), equilin, mestranol, testosterone, norethindrone and norgestrel in two groups of low (3-75 ng/mL) and high (12-300 ng/L) concentration ranges of hormones. The samples were treated with either 0.5 or 1.0 g/L of potassium ferrate(VI), and hormone concentrations were measured again after treatment. Potassium ferrate(VI) additions as low as 1.0 g/L reduced the concentration of estrogens in sludge. Potassium ferrate(VI) additions of 0.5 and 1.0 g/L were less effective at reducing the concentrations of androgens and progestogens. Increasing ferrate(VI) dose would likely result in more substantial decreases in the concentrations of fecal coliforms and hormones. The results of this study indicate that the combined use of freeze-thaw and ferrate(VI) has the potential to provide a complete sludge treatment solution in cold regions.

Authors+Show Affiliations

Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, ON, Canada K1S 5B6 E-mail: banuormeci@cunet.carleton.ca.Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, ON, Canada K1S 5B6 E-mail: banuormeci@cunet.carleton.ca.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28402303

Citation

Diak, James, and Banu Örmeci. "Ferrrate(VI) and Freeze-thaw Treatment for Oxidation of Hormones and Inactivation of Fecal Coliforms in Sludge." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 75, no. 7-8, 2017, pp. 1625-1632.
Diak J, Örmeci B. Ferrrate(VI) and freeze-thaw treatment for oxidation of hormones and inactivation of fecal coliforms in sludge. Water Sci Technol. 2017;75(7-8):1625-1632.
Diak, J., & Örmeci, B. (2017). Ferrrate(VI) and freeze-thaw treatment for oxidation of hormones and inactivation of fecal coliforms in sludge. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 75(7-8), 1625-1632. https://doi.org/10.2166/wst.2017.021
Diak J, Örmeci B. Ferrrate(VI) and Freeze-thaw Treatment for Oxidation of Hormones and Inactivation of Fecal Coliforms in Sludge. Water Sci Technol. 2017;75(7-8):1625-1632. PubMed PMID: 28402303.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ferrrate(VI) and freeze-thaw treatment for oxidation of hormones and inactivation of fecal coliforms in sludge. AU - Diak,James, AU - Örmeci,Banu, PY - 2017/4/13/entrez PY - 2017/4/13/pubmed PY - 2017/9/20/medline SP - 1625 EP - 1632 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 75 IS - 7-8 N2 - This study examined the individual and combined effects of potassium ferrate(VI) additions and freeze-thaw conditioning for the treatment and dewatering of wastewater sludge in cold climates, with particular focus on the inactivation of fecal coliforms and oxidation of estrogens, androgens, and progestogens. The first phase of the study evaluated the effects of potassium ferrate(VI) pre-treatment followed by freeze-thaw at -20 °C using a low (0.5 g/L) and high (5.0 g/L) dose of potassium ferrate(VI). The results showed that pre-treatment of anaerobically digested sludge with 5 g/L of potassium ferrate(VI) reduced the concentration of fecal coliforms in the sludge cake to below 100 MPN/g DS. The second phase evaluated the ability of ferrate(VI) to oxidise selected hormones in sludge. Anaerobically digested sludge samples were spiked with 10 different hormones: estrone (E1), 17α-estradiol, 17β-estradiol (E2), estriol (E3), 17α-ethinylestradiol (EE2), equilin, mestranol, testosterone, norethindrone and norgestrel in two groups of low (3-75 ng/mL) and high (12-300 ng/L) concentration ranges of hormones. The samples were treated with either 0.5 or 1.0 g/L of potassium ferrate(VI), and hormone concentrations were measured again after treatment. Potassium ferrate(VI) additions as low as 1.0 g/L reduced the concentration of estrogens in sludge. Potassium ferrate(VI) additions of 0.5 and 1.0 g/L were less effective at reducing the concentrations of androgens and progestogens. Increasing ferrate(VI) dose would likely result in more substantial decreases in the concentrations of fecal coliforms and hormones. The results of this study indicate that the combined use of freeze-thaw and ferrate(VI) has the potential to provide a complete sludge treatment solution in cold regions. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/28402303/Ferrrate_VI__and_freeze_thaw_treatment_for_oxidation_of_hormones_and_inactivation_of_fecal_coliforms_in_sludge_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2017.021 DB - PRIME DP - Unbound Medicine ER -