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1. Algal remediation of CO2 and nutrient discharges: A review

Author:
Judd, Simon; van den Broeke, Leo J.P.; Shurair, Mohamed; Kuti, Yussuf; Znad, Hussein
Source:
Water research 2015 v.87 pp. 356-366
ISSN:
0043-1354
Subject:
absorption; biomass; bioreactors; carbon; carbon dioxide; carbon dioxide fixation; light intensity; mass transfer; microalgae; nutrients; pH; pollutants; process control; remediation; stoichiometry; temperature; wastewater
Abstract:
... The recent literature pertaining to the application of algal photobioreactors (PBRs) to both carbon dioxide mitigation and nutrient abatement is reviewed and the reported data analysed. The review appraises the influence of key system parameters on performance with reference to (a) the absorption and biological fixation of CO2 from gaseous effluent streams, and (b) the removal of nutrients from wa ...
DOI:
10.1016/j.watres.2015.08.021

2. A new combined process for efficient removal of Cu(II) organic complexes from wastewater: Fe(III) displacement/UV degradation/alkaline precipitation

Author:
Xu, Zhe; Gao, Guandao; Pan, Bingcai; Zhang, Weiming; Lv, Lu
Source:
Water research 2015 v.87 pp. 378-384
ISSN:
0043-1354
Subject:
EDTA (chelating agent); carbon; copper; coprecipitation; decarboxylation; heavy metals; ions; iron; irradiation; ligands; pH; sodium hydroxide; solar radiation; ultraviolet radiation; wastewater
Abstract:
... Efficient removal of heavy metals complexed with organic ligands from water is still an important but challenging task now. Herein, a novel combined process, i.e., Fe(III)-displacement/UV degradation/alkaline precipitation (abbreviated as Fe(III)/UV/OH) was developed to remove copper–organic complexes from synthetic solution and real electroplating effluent, and other processes including alkaline ...
DOI:
10.1016/j.watres.2015.09.025

3. Evaluation of the potential for operating carbon neutral WWTPs in China

Author:
Hao, Xiaodi; Liu, Ranbin; Huang, Xin
Source:
Water research 2015 v.87 pp. 424-431
ISSN:
0043-1354
Subject:
anaerobic digestion; buildings; carbon; chemical oxygen demand; electricity; energy balance; heat pumps; models; sludge; solar collectors; tanks; wastewater; wastewater treatment; water pollution; China
Abstract:
... Carbon neutrality is starting to become a hot topic for wastewater treatment plants (WWTPs) all over the world, and carbon neutral operations have emerged in some WWTPs. Although China is still struggling to control its water pollution, carbon neutrality will definitely become a top priority for WWTPs in the near future. In this review, the potential for operating carbon neutral WWTPs in China is ...
DOI:
10.1016/j.watres.2015.05.050

4. Fast mineralization and detoxification of amoxicillin and diclofenac by photocatalytic ozonation and application to an urban wastewater

Author:
Moreira, Nuno F.F.; Orge, Carla A.; Ribeiro, Ana R.; Faria, Joaquim L.; Nunes, Olga C.; Pereira, M. Fernando R.; Silva, Adrián M.T.
Source:
Water research 2015 v.87 pp. 87-96
ISSN:
0043-1354
Subject:
Escherichia coli; Staphylococcus aureus; amoxicillin; aqueous solutions; carbon; diclofenac; drugs; growth retardation; hormones; microorganisms; mineralization; oxidation; ozonation; ozone; pesticides; photocatalysis; photolysis; pollutants; toxicity; vapors; wastewater
Abstract:
... The degradation of two organic pollutants (amoxicillin and diclofenac) in 0.1 mM aqueous solutions was studied by using advanced oxidation processes, namely ozonation, photolysis, photolytic ozonation, photocatalysis and photocatalytic ozonation. Diclofenac was degraded quickly under direct photolysis by artificial light (medium-pressure vapor arc, λexc > 300 nm), while amoxicillin remained very s ...
DOI:
10.1016/j.watres.2015.08.059

5. High-rate activated sludge system for carbon management – Evaluation of crucial process mechanisms and design parameters

Author:
Jimenez, Jose; Miller, Mark; Bott, Charles; Murthy, Sudhir; De Clippeleir, Haydee; Wett, Bernhard
Source:
Water research 2015 v.87 pp. 476-482
ISSN:
0043-1354
Subject:
activated sludge; biomass; carbon; chemical oxygen demand; dissolved oxygen; energy balance; mineralization; oxidation; polymers; processing technology; streams; wastewater
Abstract:
... The high-rate activated sludge (HRAS) process is a technology suitable for the removal and redirection of organics from wastewater to energy generating processes in an efficient manner. A HRAS pilot plant was operated under controlled conditions resulting in concentrating the influent particulate, colloidal, and soluble COD to a waste solids stream with minimal energy input by maximizing sludge pr ...
DOI:
10.1016/j.watres.2015.07.032

6. Navigating environmental, economic, and technological trade-offs in the design and operation of submerged anaerobic membrane bioreactors (AnMBRs)

Author:
Pretel, R.; Shoener, B.D.; Ferrer, J.; Guest, J.S.
Source:
Water research 2015 v.87 pp. 531-541
ISSN:
0043-1354
Subject:
biogas; bioreactors; carbon; computer software; design for environment; energy; energy recovery; land application; landfills; life cycle assessment; life cycle costing; methane; models; recycling; sludge; temperature; uncertainty analysis; wastewater; wastewater treatment
Abstract:
... Anaerobic membrane bioreactors (AnMBRs) enable energy recovery from wastewater while simultaneously achieving high levels of treatment. The objective of this study was to elucidate how detailed design and operational decisions of submerged AnMBRs influence the technological, environmental, and economic sustainability of the system across its life cycle. Specific design and operational decisions ev ...
DOI:
10.1016/j.watres.2015.07.002