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- Title
- PASSIVE PERMEATE-SIDE-HEATED SOLAR MEMBRANE DISTILLATION: TUBULAR AND MULTISTAGE PLANAR SYSTEMS WITH HYDROPHOBIC AND HYDROPHILIC MEMBRANES.
- Creator
- Ahmed, Shahin Sujon, Yi, Peng, Florida Atlantic University, Department of Civil, Environmental and Geomatics Engineering, College of Engineering and Computer Science
- Abstract/Description
-
In this research, a multistage (i.e., three stages) planar, and a tubular passive permeateside-heated interfacial solar membrane distillation (ISMD) has been developed. The three-stage system had an system energy efficiency of 62% in producing distilled water at an average daytime irradiance of 422 W/m2 with average distillate flux of 5 kg/(m2·day), which is higher than that of the single-stage planar systems. Production rate of distilled water in each stage of the three-stage planar system...
Show moreIn this research, a multistage (i.e., three stages) planar, and a tubular passive permeateside-heated interfacial solar membrane distillation (ISMD) has been developed. The three-stage system had an system energy efficiency of 62% in producing distilled water at an average daytime irradiance of 422 W/m2 with average distillate flux of 5 kg/(m2·day), which is higher than that of the single-stage planar systems. Production rate of distilled water in each stage of the three-stage planar system per unit area of footprint was 3.3 kg/(m2·day), while the production rate per unit area of footprint of single-stage system was 1.6 kg/(m2·day). Also, a hydrophilic nanoporous (PES NF) membrane was used in our study, which has not been found in the research of conventional MD systems. No penetration of hydrophilic nanoporous membrane was found during the operation of single-stage planar systems under simulated sunlight. The membrane was able to produce distilled water for 114 days under simulated sunlight using municipal wastewater as feed water. On the other hand, hydrophobic (0.20 and 0.45 μm) PVDF membranes were penetrated by feed water (i.e., wastewater) after approximately 50 days.
Show less - Date Issued
- 2021
- PURL
- http://purl.flvc.org/fau/fd/FA00013860
- Subject Headings
- Membrane distillation, Solar distillation, Wastewater
- Format
- Document (PDF)
- Title
- DEVELOPMENT OF A SENSITIVE POLYMERASE CHAIN REACTION (PCR) APPROACH TO DETECT ENTAMOEBA DISPAR IN INDUSTRIAL WASTEWATER.
- Creator
- Chowdhury, Rakib Ahmed, Meeroff, Daniel E., Florida Atlantic University, Department of Civil, Environmental and Geomatics Engineering, College of Engineering and Computer Science
- Abstract/Description
-
Deep injection wells are considered among the most efficient, environmentally-friendly and cost-effective techniques to dispose of wastewater. However, formation of biofilms in the casing pipe can reduce the effective diameter, which in turn, can lower the injectivity of wastewater and ultimately results in injection failure. A class 1 deep injection well located at the Solid Waste Authority of Palm Beach County was revealed to be getting clogged due to the development of a microbial...
Show moreDeep injection wells are considered among the most efficient, environmentally-friendly and cost-effective techniques to dispose of wastewater. However, formation of biofilms in the casing pipe can reduce the effective diameter, which in turn, can lower the injectivity of wastewater and ultimately results in injection failure. A class 1 deep injection well located at the Solid Waste Authority of Palm Beach County was revealed to be getting clogged due to the development of a microbial community where Entamoeba dispar, a protozoan species was found to be the abundant microorganism in the biofilm. The injection well is used to discharge industrial wastewater coming from several sources at the facility which are discharged to a collection chamber, known as the wet well, before being disposed down the deep injection well pipe. Prior to design and implementation of a suitable treatment technique to inactivate the protozoan species, it is imperative to reveal the origins of the microorganism coming to the deep injection well. Therefore, the objective of the current research was to develop a technique to identify potential sources of Entamoeba dispar. In this study, samples were collected from the seven sources as well as from the wet well. Initially, a number of onsite and laboratory experiments were conducted to monitor the water quality parameters of the collected samples. In case of microbiological investigations, microscopic analysis was carried out to detect the microorganism in the wastewater specimens followed by polymerase chain reaction (PCR) and gel-electrophoresis assays. In addition, the number of DNA copies in each of the tested samples was determined using the ImageJ app. From the microscopic analysis, no samples were found to be Entamoeba dispar positive. However, PCR and gel electrophoresis tests results indicated that wet well, NEFCO effluent, class 1, REF 1 and groundwater dilution samples were positive and the calculated number of DNA copies were 6545, 6849, 16763, 6351 and 5635 in 100 mL of the wastewater specimens respectively. The PCR technique used in this study is sensitive enough to detect even 4 DNA copies of the target microorganism. All the positive samples have one thing in common, which is they all contain local groundwater from site, indicating a potential source for further investigation.
Show less - Date Issued
- 2021
- PURL
- http://purl.flvc.org/fau/fd/FA00013871
- Subject Headings
- Entamoeba, Industrial wastewater, Sewage, Polymerase chain reaction
- Format
- Document (PDF)
- Title
- Nutrient removal fromdomestic wastewater by waterhyacinths: the importance of plant growth, detritus production anddenitrification.
- Creator
- DeBusk, T. A., Ryther, John H., Harbor Branch Oceanographic Institute
- Date Issued
- 1985
- PURL
- http://purl.flvc.org/fau/fd/FA00007290
- Subject Headings
- Sewage--Purification--Nutrient removal, Water hyacinth, Denitrification, Detritus, Wastewater
- Format
- Document (PDF)
- Title
- REVISITING THE COMPARATIVE ASSESSMENT OF MUNICIPAL WASTEWATER DISPOSAL METHODS IN SOUTHEAST FLORIDA.
- Creator
- Conboy, Kelley, Bloetscher, Frederick, Florida Atlantic University, Department of Civil, Environmental and Geomatics Engineering, College of Engineering and Computer Science
- Abstract/Description
-
A comparative risk assessment of wastewater disposal methods in southeast Florida has only been performed once and it was over 20 years ago. Since then, methods has changed and research have been developed. This study follows the methods used in the 2000 study, and assesses the following disposal methods: ocean outfalls, deep injection wells, surface water discharge, reuse for non-potable applications, indirect potable reuse, and direct potable reuse. This assessment assembled a team of...
Show moreA comparative risk assessment of wastewater disposal methods in southeast Florida has only been performed once and it was over 20 years ago. Since then, methods has changed and research have been developed. This study follows the methods used in the 2000 study, and assesses the following disposal methods: ocean outfalls, deep injection wells, surface water discharge, reuse for non-potable applications, indirect potable reuse, and direct potable reuse. This assessment assembled a team of qualified experts to complete a modified delphi survey to assess the human risks of wastewater disposal methods. Using the delphi results in a Bayesian Assessment Model, this assessment found that deep injection well and direct potable reuse were the disposal methods with the least risk.
Show less - Date Issued
- 2022
- PURL
- http://purl.flvc.org/fau/fd/FA00014068
- Subject Headings
- Sewage disposal--Florida, Wastewater, Sewage--Management
- Format
- Document (PDF)
- Title
- Effects of seasonality and plant density on the productivity of some freshwater macrophytes.
- Creator
- DeBusk, T. A., Ryther, John H., Hanisak, M. Dennis, Williams, Lavergne D.
- Date Issued
- 1981
- PURL
- http://purl.flvc.org/FCLA/DT/3331820
- Subject Headings
- Primary productivity (Biology), Eichhornia crassipes, Water hyacinth, Lemna minor, Hydrilla verticillata, Wastewater treatment and reuse
- Format
- Document (PDF)
- Title
- Contribution of on-site treatment and disposal systems on coastal nutrient loading.
- Creator
- Morin, Frederic., Florida Atlantic University, Meeroff, Daniel E., College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
- Abstract/Description
-
When onsite treatment and disposal systems (OSTDS) are not properly sited, they can be a potential risk to public health and a source of environmental degradation. In Florida, OSTDS location has proven to be problematic from a water resources perspective. The objective of this study is to quantify the pollutant loading contributions from OSTDS on coastal canals, with regard to nutrients and pathogens indicators (Total Coliform, E. coli, Enterococcus). Two similar single-family residential...
Show moreWhen onsite treatment and disposal systems (OSTDS) are not properly sited, they can be a potential risk to public health and a source of environmental degradation. In Florida, OSTDS location has proven to be problematic from a water resources perspective. The objective of this study is to quantify the pollutant loading contributions from OSTDS on coastal canals, with regard to nutrients and pathogens indicators (Total Coliform, E. coli, Enterococcus). Two similar single-family residential locations were identified: Dania Beach, FL (with 100% OSTDS) and Hollywood, FL (with 100% sewer). Field studies were conducted during the height of the wet and dry seasons. During the wet season, surface water quality of the canal was affected by an OSTDS contribution with higher levels of nutrients and pathogens indicators. During the dry season, no OSTDS impact was detected. OSTDS appear to work properly during the dry season.
Show less - Date Issued
- 2005
- PURL
- http://purl.flvc.org/fcla/dt/13224
- Subject Headings
- Estuarine ecology, Sewage disposal--Florida, Sewage--Purification--Nitrogen removal, Land treatment of wastewater--Florida
- Format
- Document (PDF)