Application of a full-scale newly developed stacked constructed wetland and an assembled bio-filter for reducing phenolic endocrine disrupting chemicals from secondary effluent

2017 ◽  
Vol 99 ◽  
pp. 496-503 ◽  
Author(s):  
Yu-nv Dai ◽  
Ran Tao ◽  
Yi-ping Tai ◽  
Nora Fung-yee Tam ◽  
Dan A. ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Endocrine Disrupting Chemicals ◽  
Full Scale ◽  
Secondary Effluent ◽  
Endocrine Disrupting

Effect of wastewater chlorination on endocrine disruptor removal

2013 ◽  
Vol 67 (7) ◽  
pp. 1551-1556 ◽  
Author(s):  
C. Noutsopoulos ◽  
D. Mamais ◽  
V. Samaras ◽  
T. Bouras ◽  
M. Marneri ◽  
...  
Keyword(s):  
Wastewater Treatment Plants ◽  
Endocrine Disrupting Chemicals ◽  
Wastewater Reuse ◽  
Endocrine System ◽  
Secondary Effluent ◽  
Batch Tests ◽  
Toxic Metabolites ◽  
Endocrine Disrupting ◽  
Water Courses ◽  
Removal Efficiencies

Endocrine disrupting chemicals (EDCs) are compounds of mainly anthropogenic origin that interfere with the endocrine system of animals and humans thus causing a series of disorders. Wastewater treatment plants are one of the major routes for transporting such chemicals to the water courses. In the context of this study, several chlorination batch tests were performed in order to assess the effectiveness of chlorination to remove bisphenol A (BPA), triclosan (TCS), nonylphenol (NP) and its ethoxylates (NP1EO and NP2EO) from secondary effluent. According to the results, an appreciable removal of NP, BPA and TCS to the order of 60–84% was observed as an effect of moderate chlorination doses. This was not the case for NP1EO and NP2EO as even at high chlorine doses, removal efficiencies were lower (37% for NP1EO and 52% for NP2EO). Removal efficiencies of NP, BPA and TCS are practically independent of contact time, although this was not the case for NP1EO and NP2EO. Based on toxicity experiments, it is anticipated that following chlorination of the target chemicals, production of more toxic metabolites is taking place. Therefore the effectiveness of chlorination to remove EDCs is questionable and more research is needed to guarantee safe wastewater reuse.

Sustainable biodegradation of phenolic endocrine-disrupting chemicals by Phragmites australis–rhizosphere bacteria association

2013 ◽  
Vol 68 (3) ◽  
pp. 522-529 ◽  
Author(s):  
T. Toyama ◽  
T. Ojima ◽  
Y. Tanaka ◽  
K. Mori ◽  
M. Morikawa
Keyword(s):  
Phragmites Australis ◽  
Batch Reactor ◽  
Endocrine Disrupting Chemicals ◽  
Secondary Effluent ◽  
Effluent Water ◽  
Bisphenol S ◽  
Bisphenol F ◽  
Phenolic Ring ◽  
Endocrine Disrupting ◽  
Sustainable Treatment

The efficacy of two rhizobacteria (Sphingobium fuliginis TIK1 and Sphingobium sp. IT4) of Phragmites australis for the sustainable treatment of water polluted with phenolic endocrine-disrupting chemicals (EDCs) was investigated. Strains TIK1 and IT4 have recently been isolated from Phragmites rhizosphere and shown to degrade various 4-alkylphenols–TIK1 via phenolic ring hydroxylation and meta-cleavage and IT4 via ipso-hydroxylation. The two strains also degraded bisphenol A (BPA), bisphenol B, bisphenol E, bisphenol F, bisphenol P and bisphenol S (BPS). Thus, strains TIK1 and IT4 have wide degradation spectra for phenolic EDCs. The two strains utilized Phragmites root extracts as a sole carbon source and sustainably colonized Phragmites roots, where they degraded phenolic EDCs. In sequencing batch reactor experiments using Phragmites in association with TIK1 or IT4, both associations repeatedly removed phenolic EDCs from polluted secondary effluent water (BPA, BPS, 4-tert-butylphenol, 4-tert-octylphenol and 4-nonylphenol) from polluted secondary effluent water. The results suggest that hydroponic systems using Phragmites–TIK and Phragmites–IT4 associations would be useful for sustainable treatment of polluted waters containing various phenolic EDCs.

Removal of endocrine-disrupting chemicals by ozonation in sewage treatment

2006 ◽  
Vol 54 (10) ◽  
pp. 123-132 ◽  
Author(s):  
Heqing Zhang ◽  
Harumi Yamada ◽  
Sung-Eun Kim ◽  
Hyo-sang Kim ◽  
Hiroshi Tsuno
Keyword(s):  
Endocrine Disrupting Chemicals ◽  
Sewage Treatment ◽  
Secondary Effluent ◽  
Batch Reactors ◽  
Efficient Removal ◽  
Batch Mode ◽  
Endocrine Disrupting Chemical ◽  
Sewage Treatment Plants ◽  
Endocrine Disrupting ◽  
By Products

Treatment experiments by two laboratory scale semi-batch reactors and a demonstration scale process were both carried out to evaluate endocrine disrupting chemical removal characteristics by ozonation in sewage treatment. In the semi-batch mode experiments, secondary effluent and primary effluent of sewage treatment plants were ozonated respectively. Behaviour of brominated by-products was also evaluated. The results based on these studies indicated that estrogenicity in wastewater can be removed by ozonation effectively. The condition of ozonation until dissolved ozone concentration increased to 0.1 mg/L, which corresponded to 1 mgO3/mgC and 0.4 mgO3/mgC of ozone consumption per initial DOC for secondary effluent and primary effluent, respectively, is proposed as an appropriate operational condition for efficient removal of EDCs as well as UV254 and SUVA without production of brominated by-products.

scholarly journals Combined Process of Ozone Oxidation and Ultrafiltration as an Effective Treatment Technology for the Removal of Endocrine-Disrupting Chemicals

2018 ◽  
Vol 8 (8) ◽  
pp. 1240 ◽  
Author(s):  
Xiurong Si ◽  
Zunfang Hu ◽  
Shiyuan Huang
Keyword(s):  
Removal Efficiency ◽  
Water Reuse ◽  
Wastewater Treatment Plants ◽  
Endocrine Disrupting Chemicals ◽  
Secondary Effluent ◽  
Treatment Technology ◽  
Combined Process ◽  
Combined Application ◽  
Endocrine Disrupting ◽  
Ethynyl Estradiol

Endocrine-disrupting chemicals (EDCs) in the secondary effluent discharged from wastewater treatment plants are of great concern when water reuse is intended. The combined process of ozone (O3) and ultrafiltration (UF) is a promising EDC removal method. The removal efficiency of five EDCs using O3, UF and their combination were investigated and compared. The five EDCs were estrone, 17β-estradiol, estriol, 17α-ethynyl estradiol and bisphenol A, which are typically present in secondary effluent. Results showed that organic matters in secondary effluent became easier to be removed by the combined process, with ultraviolet absorbance reduction enhanced by 11%–18% or 24%–26% compared to the UF or O3 alone. The removal efficiency of EDC concentration, estrogenicity and acute ecotoxicity by the combined process was 17%–29% or 54%–92%, 19% or 73%, 40% or 60% greater, respectively, than that of the O3 or UF alone. Particularly, when EDCs were treated by the combination of O3 and UF, about 100% EDC removal efficiency was achieved. Overall, the combined application of O3 and UF offers an effective approach to control the concentration and toxicity of EDCs in secondary effluent.

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