scholarly journals The Potential Role of Hybrid Constructed Wetlands Treating University Wastewater—Experience from Northern Italy

2020 ◽  
Vol 12 (24) ◽  
pp. 10604
Author(s):  
Stevo Lavrnić ◽  
Maribel Zapater Pereyra ◽  
Sandra Cristino ◽  
Domenico Cupido ◽  
Giovanni Lucchese ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Pilot Plant ◽  
Wastewater Reuse ◽  
Domestic Wastewater ◽  
Horizontal Flow ◽  
Water Losses ◽  
One Year ◽  
The University ◽  
Natural Water Bodies

University wastewater is a type of wastewater with higher pollutants load and flow rate variability than typical domestic wastewater. Constructed wetlands (CW) could be used for university wastewater treatment and consequently for wastewater reuse. A hybrid CW pilot plant, at the University of Bologna (Italy), was monitored to assess its potential to be used at the university. Its treatment performance was monitored for one year and public acceptance explored through a survey. The pilot plant had two treatment lines, (1) a vertical flow CW (VFCW) and a planted horizontal flow CW (HFCW), and (2) the same VFCW and an unplanted horizontal flow filter (HFF). The HFCW achieved higher removals than the HFF, but it was also found to be prone to higher water losses. However, both treatment lines met the Italian limits for discharge in natural water bodies and some of the limits for wastewater reuse in Italy and the EU. The VFCW alone was not able to meet the same limits, demonstrating the advantages of hybrid over single stage CWs. A positive attitude towards CWs and wastewater reuse was found among the survey participants. Therefore, hybrid CWs (planted and unplanted) are considered a feasible technology for application at universities.

Pilot-plant experiments for improvement of polluted canal/klong water by rock-bed filtration

1997 ◽  
Vol 35 (8) ◽  
pp. 83-90
Author(s):  
Shigeo Fujii ◽  
Chiaki Niwa ◽  
Mitsuo Mouri ◽  
Ranjna Jindal
Keyword(s):  
Organic Matter ◽  
Pilot Plant ◽  
Horizontal Flow ◽  
Removal Mechanism ◽  
Soluble Organic Matter ◽  
Filter Media ◽  
Canal Water ◽  
Rock Bed ◽  
One Year ◽  
Filtration Technique

Applicability of the rock-bed filtration technique was investigated through pilot-plant experiments in Bangkok, Thailand. Polluted canal water was used as horizontal flow influent to two reactor channels filled with rocks. During one year operation, HRT, filter media, and aeration mode, were changed in several runs. The results showed that 1) the rock-bed filtration with aeration and the HRT more than 6 h can successfully improve polluted klong water by reducing the pollutants (e.g. 60-120mg/L of SS to 20-40 mg/L and 15-30 mg/L of BOD to 5-20 mg/L); 2) main removal mechanism seems to be the sedimentation resulting from the settleability enhanced by aeration, and the biofilm attached onto rocks also works in the reduction of soluble organic matter; 3) a combination of three rock sizes arranged in descending order showed best results; 4) longer HRT (13 h) produces better effluent but is not so effective if it exceeds 9 hours; 5) 60-70% of sediment IL was decomposed in a year, and porosity in rock beds reduced approximately 16%.

scholarly journals Performance of Four Full-Scale Artificially Aerated Horizontal Flow Constructed Wetlands for Domestic Wastewater Treatment

Water ◽  
2016 ◽  
Vol 8 (9) ◽  
pp. 365 ◽  
Author(s):  
Eleanor Butterworth ◽  
Andrew Richards ◽  
Mark Jones ◽  
Gabriella Mansi ◽  
Ezio Ranieri ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Domestic Wastewater ◽  
Full Scale ◽  
Horizontal Flow ◽  
Domestic Wastewater Treatment

scholarly journals Give ’Em What They Want: A One-Year Study of Unmediated Patron-Driven Acquisition of e-Books

2012 ◽  
Vol 73 (5) ◽  
pp. 469-492 ◽  
Author(s):  
Karen S. Fischer ◽  
Michael Wright ◽  
Kathleen Clatanoff ◽  
Hope Barton ◽  
Edward Shreeves
Keyword(s):  
Management Program ◽  
Collection Management ◽  
User Needs ◽  
University Of Iowa ◽  
Usage Cost ◽  
One Year ◽  
The University

In September 2009, the University of Iowa Libraries embarked on an experiment with patron-driven acquisition (PDA) of e-books with ebrary and YBP. An e-book–only PDA plan was initiated, entirely unmediated and with instantaneous access to the content. MARC records were loaded for each title, determined by our YBP approval profile and other limitations, for a total of 12,000 PDA records. Usage, cost, subject, and publisher data were analyzed for 850 purchased PDA e-books and thousands of other ebrary subscription titles. Results indicate that PDA can be a useful and effective tool for meeting user needs and building the local collection, but the role of PDA in the library’s collection management program presents challenges as well as opportunities.

Sludge production in membrane bioreactors under different conditions

2000 ◽  
Vol 41 (10-11) ◽  
pp. 251-258 ◽  
Author(s):  
J. Wagner ◽  
K-H. Rosenwinkel
Keyword(s):  
Activated Sludge ◽  
Pilot Plant ◽  
Membrane Bioreactors ◽  
Conventional Activated Sludge ◽  
Theoretical Approaches ◽  
One Year ◽  
Conventional Systems ◽  
The University ◽  
Activated Sludge Systems ◽  
Sludge Production

With membrane bioreactors, the production of surplus sludge is lower than with conventional activated sludge systems, a fact that has been confirmed in a large number of analyses. There is, however, no consensus about the dimension of the reactions and their respective causes. In order to examine these, at the University of Hanover a pilot plant with a capacity of 220 l was run for one year without any extraction of surplus sludge. The plant was started with 2 g MLSS/l; after one year, this value had risen to approximately 18 g MLSS/l. In order to be able to set the plant for different sludge loads (0.04 to 0.2 kg COD/(kg MLSS · d)), the wastewater was artificially stocked up. The emerging result was that in contrast to conventional systems the sludge growth was lower, but still continuously existing. Then, comparisons with theoretical approaches were run – among others with the ASM1-Model – which confirmed the findings. One possible reason could be the different biocoenoses, which was assumed to be the cause after several microscopic examinations had been run.

scholarly journals The employment of Łódź University tourism and recreation graduates: A sociological analysis

Turyzm ◽  
2017 ◽  
Vol 27 (1) ◽  
pp. 65-74
Author(s):  
Remigiusz Żulicki
Keyword(s):  
Logistic Regression ◽  
Institutional Characteristics ◽  
Sociological Analysis ◽  
Independent Variables ◽  
Graduate Employment ◽  
The Status ◽  
Quantitative Results ◽  
One Year ◽  
The University

This article is focused on selected aspects of the economic ‘fate’ of Tourism and Recreation graduates of the University of Łódź (UŁ). Its aim is to seek answers to the question: ‘What determines graduate employment?’ Surveys conducted by the Career Office of University of Łódź among graduates one year after graduation in 2014, 2015 and 2016 are the empirical basis. Tourism and Recreation graduates were compared with others from the Faculty of Geographical Sciences UŁ. The logistic regression technique was used to predict the status of graduate employment based on independent variables. The strongest predictors of graduate employment were structural and institutional characteristics. The quantitative results were interpreted in the context of the modern role of universities.

Application of Constructed Wetland to Rural Domestic Wastewater Treatment in China

2014 ◽  
Vol 1073-1076 ◽  
pp. 1011-1014
Author(s):  
Fang Chen ◽  
Qiang Yao
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Constructed Wetland ◽  
Rural Economy ◽  
Domestic Wastewater ◽  
Treatment Technology ◽  
Domestic Wastewater Treatment ◽  
The One ◽  
Low Nitrogen

Constructed wetland is a new wastewater treatment technology. It not only is more effective in wastewater treatment, but also has good eco-landscapes value. According to the characteristics of domestic wastewater discharge in rural, constructed wetlands is a key technology to solving this problem in China. Application of constructed wetland to Chinese rural domestic wastewater treatment was reviewed in this paper. On this basis, the issues in the application of constructed wetland encountered, and future trends are discussed. On the one hand, constructed wetlands were prone to clogging and low nitrogen removal efficiency. On the other hand, some existing constructed wetlands were abandoned due to poor maintenance and management. Therefore, in order to play better the role of wastewater treatment, anti-blocking ability and denitrification efficiency of constructed wetlands should be improved. Meanwhile, the maintenance and management of constructed wetlands should be strengthened. Application of constructed wetlands in the rural area provides a strong guarantee for sustainable development of rural economy.

The role of sand, marble chips and Typha latifolia in domestic wastewater treatment – a column study on constructed wetlands

2016 ◽  
Vol 37 (19) ◽  
pp. 2508-2515 ◽  
Author(s):  
Rakesh Kadaverugu ◽  
Rita P. Shingare ◽  
Karthik Raghunathan ◽  
Asha A. Juwarkar ◽  
Prashant R. Thawale ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Typha Latifolia ◽  
Domestic Wastewater ◽  
Column Study ◽  
Domestic Wastewater Treatment
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