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1. Algal recycling enhances algal productivity and settleability in Pediastrum boryanum pure cultures

Author:
Park, Jason B.K.; Craggs, Rupert J.; Shilton, Andy N.
Source:
Water research 2015 v.87 pp. 97-104
ISSN:
0043-1354
Subject:
Pediastrum; algae; bacteria; biomass production; culture media; gravity; growth chambers; ponds; recycling; summer; wastewater; wastewater treatment; New Zealand
Abstract:
... Recycling a portion of gravity harvested algae (i.e. algae and associated bacteria biomass) has been shown to improve both algal biomass productivity and harvest efficiency by maintaining the dominance of a rapidly-settleable colonial alga, Pediastrum boryanum in both pilot-scale wastewater treatment High Rate Algal Ponds (HRAP) and outdoor mesocosms. While algal recycling did not change the relat ...
DOI:
10.1016/j.watres.2015.09.013

2. 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

3. 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

4. CO2-neutral wastewater treatment plants or robust, climate-friendly wastewater management? A systems perspective

Author:
Larsen, Tove A.
Source:
Water research 2015 v.87 pp. 513-521
ISSN:
0043-1354
Subject:
anaerobic ammonium oxidation; carbon dioxide; chemical oxygen demand; climate; electricity; energy efficiency; energy resources; greenhouse gas emissions; heat; methane; nitrous oxide; nutrients; sludge; temperature; urine; wastewater; wastewater treatment
Abstract:
... CO2-neutral wastewater treatment plants can be obtained by improving the recovery of internal wastewater energy resources (COD, nutrients, energy) and reducing energy demand as well as direct emissions of the greenhouse gases N2O and CH4. Climate-friendly wastewater management also includes the management of the heat resource, which is most efficiently recovered at the household level, and robust ...
DOI:
10.1016/j.watres.2015.06.006

5. 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

6. 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

7. 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

8. Interrogating chemical variation via layer-by-layer SERS during biofouling and cleaning of nanofiltration membranes with further investigations into cleaning efficiency

Author:
Cui, Li; Chen, Pengyu; Zhang, Bifeng; Zhang, Dayi; Li, Junyi; Martin, Francis L.; Zhang, Kaisong
Source:
Water research 2015 v.87 pp. 282-291
ISSN:
0043-1354
Subject:
DNA; Raman spectroscopy; bacterial adhesion; biochemical polymorphism; biofilm; biofouling; cleaning; nanofiltration; polysaccharides; sodium dodecyl sulfate; surfactants; wastewater; water reuse
Abstract:
... Periodic chemical cleaning is an essential step to maintain nanofiltration (NF) membrane performance and mitigate biofouling, a major impediment in high-quality water reclamation from wastewater effluent. To target the important issue of how to clean and control biofouling more efficiently, this study developed surface-enhanced Raman spectroscopy (SERS) as a layer-by-layer tool to interrogate the ...
DOI:
10.1016/j.watres.2015.09.037

9. Lithium sorption properties of HMnO in seawater and wastewater

Author:
Park, HyunJu; Singhal, Naresh; Jho, Eun Hea
Source:
Water research 2015 v.87 pp. 320-327
ISSN:
0043-1354
Subject:
adsorbents; hydrochloric acid; leaching; lithium; manganese oxides; mixing; pH; seawater; sorption; sorption isotherms; thermodynamics; washing; wastewater
Abstract:
... The lithium concentration in seawater is 0.17 mg/L, which is very low, but the overall quantity is approximately 2.5 × 1014 kg. Therefore, seawater, which contains a vast amount of lithium, could be a major alternative source that might supply the rising demand for lithium. This research was undertaken to evaluate the feasibility of a manganese oxide (HMnO) adsorbent, which was produced after leac ...
DOI:
10.1016/j.watres.2015.09.032

10. 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

11. Nitrate reduction by denitrifying anaerobic methane oxidizing microorganisms can reach a practically useful rate

Author:
Cai, Chen; Hu, Shihu; Guo, Jianhua; Shi, Ying; Xie, Guo-Jun; Yuan, Zhiguo
Source:
Water research 2015 v.87 pp. 211-217
ISSN:
0043-1354
Subject:
anaerobic ammonium oxidation; biofilm; biogas; coculture; denitrification; methane; nitrate reduction; nitrifying bacteria; nitrites; nitrogen; wastewater; wastewater treatment
Abstract:
... Methane in biogas has been proposed to be an electron donor to facilitate complete nitrogen removal using denitrifying anaerobic methane oxidizing (DAMO) microorganisms in an anaerobic ammonium oxidation (anammox) reactor, by reducing the nitrate produced. However, the slow growth and the low activity of DAMO microorganisms cast a serious doubt about the practical usefulness of such a process. In ...
DOI:
10.1016/j.watres.2015.09.026

12. Phosphorus removal performance and speciation in virgin and modified argon oxygen decarburisation slag designed for wastewater treatment

Author:
Zuo, Minyu; Renman, Gunno; Gustafsson, Jon Petter; Renman, Agnieszka
Source:
Water research 2015 v.87 pp. 271-281
ISSN:
0043-1354
Subject:
X-radiation; absorption; apatite; argon (noble gases); calcium; models; oxygen; pH; phosphorus; polyethylene glycol; slags; spectroscopy; wastewater; wastewater treatment
Abstract:
... Argon oxygen decarburisation (AOD) slag may be used for phosphorus (P) removal, as its high pH and weatherable calcium (Ca) minerals provide sufficient Ca2+ and OH− for calcium phosphate (Ca–PO4) precipitation. This study examined the P removal performance of AOD slag for use as wastewater treatment material. Batch experiments were carried out using both synthetic P solution and real wastewater, f ...
DOI:
10.1016/j.watres.2015.09.035

13. Spoilt for choice: A critical review on the chemical and biological assessment of current wastewater treatment technologies

Author:
Prasse, Carsten; Stalter, Daniel; Schulte-Oehlmann, Ulrike; Oehlmann, Jörg; Ternes, Thomas A.
Source:
Water research 2015 v.87 pp. 237-270
ISSN:
0043-1354
Subject:
activated carbon; biological assessment; chlorination; cytotoxicity; ecotoxicology; engineering; filtration; genotoxicity; in vitro studies; in vivo studies; microbiology; models; monitoring; mutagenicity; oxidation; ozonation; stress response; toxicogenomics; wastewater; wastewater treatment; water quality
Abstract:
... The knowledge we have gained in recent years on the presence and effects of compounds discharged by wastewater treatment plants (WWTPs) brings us to a point where we must question the appropriateness of current water quality evaluation methodologies. An increasing number of anthropogenic chemicals is detected in treated wastewater and there is increasing evidence of adverse environmental effects r ...
DOI:
10.1016/j.watres.2015.09.023