THE FATE AND BEHAVIOUR OF STEROID HORMONES IN WASTEWATER SLUDGE ANAEROBIC DIGESTION AT MESOPHILIC AND THERMOPHILIC TEMPERATURES
Published In: 4TH INTERNATIONAL CONFERENCE ON ADVANCES IN BIO-INFORMATICS, BIO-TECHNOLOGY AND ENVIRONMENTAL ENGINEERING
Author(s): AUGUSTINE O. IFELEBUEGU , STEPHEN C.THEOPHILUS
Abstract: The disposal of biosolids to agricultural land is a major route for recycling municipal wastewater biosolids. However, there are concerns over the long-term build-up of endocrine disrupting chemicals (EDCs), a major constituent of biosolids in agricultural soils and their potential environmental effects. Hence, there is need to investigate the fate and behavior of EDCs in wastewater and sludge treatment processes. Thisstudy investigated the fate and behaviour of estrone (E1), 17ß-estradiol (E2) and 17α-ethynylestradiol (EE2) during anaerobic digestion of surplus activated sludge in a batch reactor at mesophilic and thermophilictemperatures. The results showed removal rates of 35%, 61% and 52% at mesophilic temperatures (35oC) and 24%, 63% and 79% at thermophilic temperatures (55oC) for E1, E2 and EE2 respectively. It was observed that E1 had a lower removal due to biotransformation of E2. Anaerobic digestion contributes to the overall reduction of EDCs in municipal biosolids, but EDCs
- Publication Date: 18-Mar-2016
- DOI: 10.15224/978-1-63248-091-0-61
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APPLICATION OF ANALYTIC HIERARCHY PROCESS FOR ANALYSIS OF IMPACT SIGNIFICANCE IN EIA OF OIL AND GAS INDUSTRY
Published In: 4TH INTERNATIONAL CONFERENCE ON ADVANCES IN BIO-INFORMATICS, BIO-TECHNOLOGY AND ENVIRONMENTAL ENGINEERING
Author(s): STEPHEN C.THEOPHILUS , BABATUNDE ANIFOWOSE , TOMINAYINGIBO L. FUBARA-MANUE
Abstract: Impact significance determination is one key task required of all EIA undertakings. A major issue in EIA analysis is the subjectivity resulting in, inconsistencies in experts’ and stakeholders’ judgment. However, Analytic Hierarchy Process (AHP) can serve as a check for inconsistencies and tool for aggregation of the different experts’ and stakeholders’ opinions on impact assessment. This study investigated the integration of AHP into EIA impact significance determination to assess the effect of consistency and inconsistency in stakeholder judgments. A case study to investigate an application of the proposed method in a major oil pipeline’s replacement project is presented. It was observed that the opinions of both experts and stakeholders were uniform on some impacts such as land use, water contamination and an increase in the cost of health services, representing 18.75% of all the identified impacts. Conversely, there were differences in opinions on other impacts revealing what could
- Publication Date: 18-Mar-2016
- DOI: 10.15224/978-1-63248-091-0-62
- Views: 0
- Downloads: 0