Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Free water surface"”.
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Using Free Water Surface Constructed Wetland for the Mitigation of High PH Secondary Effluent From Municipal Wastewater Treatment Plant
Wastewater stabilization ponds (WSPs) are considered to be the most sustainable technology for small, rural and remote communities in North America. However, due to the configuration of WSPs and limited control over these systems, performance concerns during certain parts of the year may arise, as …
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Effectiveness of Wastewater Treatment for Selected Contaminants Using Constructed Wetlands in Mediterranean Climates
<p>Constructed wetlands for wastewater treatment (CWWT) are engineered wetland systems created to emulate the processes that occur in natural wetlands. This research focused on looking at the effectiveness of selected contaminant removal based on pilot-scale and full-scale case studies conducted in …
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Numerical Models for Scour and Liquefaction Around Object Under Currents and Waves
… numerical model for the sea bed response under free surface water waves is constructed. Free water surface is modeled by volume of fluid (VOF) method and water waves are generated by numerical wave-maker boundary condition. An iterative numerical scheme is proposed to solve the Biot …
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Control of agricultural nonpoint source pollution in Kranji Catchment, Singapore
… can be directly traced to agricultural runoff. Water quality samples were collected along the main drainage channel in the Neo Tiew subcatchment, which drains to Kranji Reservoir, in an effort to determine the source and degree of agricultural nonpoint source pollution in the area. Grab samples …
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Water Quality Spatial Heterogeneity in Wastewater Stabilization Ponds at Elevated pH
… to elevated pH in secondary facultative wastewater stabilization ponds (WSPs). Loyalist Township, Ontario, operates a water pollution control plant that employs three facultative WSPs that have experienced elevated pH levels in the summer months due to excessive algae growth. In efforts to …
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SET-WET: A Wetland Simulation Model to Optimize NPS Pollution Control
… Written in Fortran 77, SET-WET models both free water surface (FWS) and sub-surface flow (SSF) wetlands and is designed in a modular manner which gives the user the flexibility to decide which cycles and processes to model. SET-WET differs from many existing wetland models in that it uses a …
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Investigation of constructed wetlands capability to remove mercury from contaminated waters
… and low-cost technology in treating wastewater. It was reported that wetlands (natural and constructed) were used to purify (a) municipal; (b) industrial; (c) acidic; and (d) agricultural wastewater. Mercury has been used intensively by wide variety of industries because of its unique …
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Water relations of the endemic New Zealand frogs Leiopelma archeyi, L. Hamiltoni and L. Hochstetteri
Aspects of habitat and water balance physiology were compared between the endemic and anatomically primitive New Zealand frogs Leiopelma archeyi, L. hamiltoni and L. hochstetteri. Field studies in an area of the Coromandel Range showed that the partially sympatric L. archeyi and L. hochstetteri had …
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Βελτιστοποίηση φυσικών συστημάτων επεξεργασίας υγρών αποβλήτων
Η μελέτη ενός πειράματος μικρής πιλοτικής κλίμακας, με δύο παράλληλα συστήματα ρηχών λεκανών (ύψους 0.35m), η μία λεκάνη με φύτευση του είδους Typha Latifolia και η άλλη χωρίς φύτευση, διεξάχθηκε για τον σχεδιασμό ελεύθερης επιφανειακής ροής (FWS) τεχνητού υγροτόπου. Οι δύο λεκάνες τροφοδοτήθηκαν …