A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [Show all]

Related content

Displaying publicaions: 1 - 29 of 29
Quantitative Microbial Risk Assessment of Organic Waste Management Practices in a Peri-urban Community
Swar, Aung Kyaw
Master's Thesis, Asian Institute of Technology, Thailand This study attempted to determine the health risks from the organic waste management practices in Tha Klong municipality, Pathumthani province, Thailand. Download
Reuse and Recycle of Bio-residue (percolate) from Constructed Wetland Treating Septage
Hadsoi, Sukon
Master's Thesis, Asian Institute of Technology, Thailand "The prime objective of this research is to investigate the suitability of percolate from constructed wetland (CW) treating septage in agricultural application with the specific focus on determination of appropriate application ratio of percolate on sunflower plantation and crop yields." Download
Fäkalschlammbehandlung in den Tropen am Beispiel von Vererdungsbeeten
Heinss, Udo
"Ein großer Anteil der in tropischen Großstädten eingesammelten Fäkalschlämme gelangt unbehandelt in die Umwelt. Daher ist es notwendig, neben angepassten Schlammbehandlungsverfahren auch Fäkalschlammmanagement-Konzepte zu entwickeln. Eine mögliche Behandlungsoption, die Schlammvererdung in bepflanzten Trockenbeeten, konnte erfolgreich in Bangkok getestet werden. Dabei wurde eine hohe optimale Feststoffbeladung von 250 kg TS/m2 d gefunden." KA- Abwasser, Abfall 2003, Vol. 50, No. 9, pp. 1162-1167 Download
Health risks related to wastewater reuse in Thailand using quantitative microbial risk assessment (QMRA)
Ferrer Duch, Aleix
In the context of the Work Package 3 (Health and Environmental sanitation)within the NCCR North-South, a conceptual framework has been developed using an approach combining health, ecological, socio-economic and cultural assessments. Master's Thesis at University of Basel Download
The Tha Chin River is Overloaded with Nutrients
Schaffner, Monika
"Increasingly intensive farming practices have led to a dramatic deterioration of water quality in the Tha Chin River in Thailand. One major problem is the high level of nutrients. According to our model – based on material flow analysis – intensive aquaculture accounts for a large proportion of the nutrient inputs." Eawag News 62d: 18-20. Download
Material Flow Analysis in the Tha Chin River Basin, Thailand
Schaffner, Monika
The Material Flow Analysis (MFA) model provides an overview of the main nutrient flows in the Tha Chin River Basin, Central Thailand. Instead of extensive measuring campaigns, local data is integrated into the model to quantify these flows and find suitable remediation measures. Download (1 MB)
Assessment of water quality problems and mitigation potentials by using material flow analysis
Schaffner, Monika
"Material flow analysis (MFA) is a promising tool for river water quality management. Based on orders-ofmagnitude estimations, the approach provides an overview of pollution problems and their dimensions in a river system, allowing to identify key sources and pathways of pollution, and to evaluate mitigation priorities. The current study aims at investigating MFA to assess river water quality problems and mitigation measures in developing countries, based on a case-study carried out in the Tha Chin River Basin (TRB), Thailand." Proceedings of the International Symposium on the Role of Water Sciences in Transboundary River Basin Management, Ubon Ratchathani (Thailand), 10-12 March 2005 Download PDF from: MekongBasinResearchNetwork
Research Partnerships for Sustainable Development in Southeast Asia
Koottatep, Thammarat
Highlights of the work conducted over the past four years in Southeast Asia are the focus of a brochure just out. The brochure - Research Partnerships for Sustainable Development in Southeast Asia - was published by the NCCR North-South team based in Bangkok. Download pdf
Modeling the contribution of point sources and non-point sources to Thachin River water pollution
Schaffner, Monika
Paper available at: http://www.sciencedirect.com/science/article/pii/S0048969709004628
Ferne Länder, andere Stoffflüsse
[Swiss Federal Institute of Aquatic Science and Technology], Eawag
German edition of Eawag News on material flows in foreign lands. An accounting method for the analysis of flows of ecologically significant materials and resources is increasingly being used by Eawag to assess acute environmental problems in developing and emerging countries. The German edition of Eawag News reports on projects carried out in Bangladesh, Eritrea, Congo/Rwanda, Cuba, Thailand and Vietnam. EAWAG News 62d December 2006 Download from: EAWAG
Watershed Classification in the Lower Mekong Basin
Heinimann, Andreas
Mountain Research and Development 2005, Volume 25, Issue 2, pp. 181–182 Order via your university library from: BioOne
Hydrological Patterns in the Tha Chin River Basin, Thailand
Walcher, Claus
"This thesis lays the focus on the hydrological patterns in the Tha Chin River Basin in Thailand. The study shall contribute to understanding the hydrological system of the Tha Chin River, as a contribution for a Material Flow Analysis (MFA). Existing hydrological data sets are analyzed and complemented by own measured discharge data, in order to quantify the discharge and the water balance of the Tha Chin River. In addition, strategies governing the regulations of canal and main river discharges are explained." Master's Thesis, University of Bern, Switzerland Download
Alarm – zu viele Nährstoffe im Tha Chin Fluss
Schaffner, Monika
"Mit zunehmender landwirtschaftlicher Intensivierung hat sich die Wasserqualität des Tha Chin in Thailand massiv verschlechtert. Ein enormes Problem ist der hohe Nährstoffgehalt des Flusses. Unser Stoffflussmodell zeigt, dass ein Grossteil der Nährstoffe aus der intensiven Fischzucht stammt." Eawag News 62d December 2006, pp. 18-20. Download
Patterns of Land Cover Change in the Lower Mekong Basin
Heinimann, Andreas
PhD Thesis, University of Bern, Switzerland "The present study seeks to generate a comparable information and knowledge base about land cover change on a mesoscale level for the entire Lower Mekong Basin. Such information is crucial to both informed decision making and the transboundary negotiations on the use and protection of the shared natural resources in regional bodies such as the Mekong River Commission. It may form the basis for achieving a common understanding regarding resource management in the Basin despite diverging national interests. [...]" Download Summary For further information, please contact: Andreas Heinimann
Applying a Material Flow Analysis Model to Assess River Water Pollution and Mitigation Potentials
Schaffner, Monika
PhD Thesis, University of Bern, Switzerland [...] With the current research, a Mathematical Material Flow Analysis (MMFA) is applied as an alternative approach to conventional river water quality models. Applied to analyze river water polllution, the MMFA allows to trace the pollution flows and their transformations from their input to the system as resource, through waste production, separation, treatment and finally to their outputs as product or as discharge into receiving water bodies. In this way, the perspective is widened to grasp the river system in an overview and to understand the origins and the main processes involved in the chain of nutrient pollution generation. The key parameters influencing the pollution flows are determined, based on which concrete and effective mitigation measures can be devised and evaluated. [...]
Wastewater Effluent Polishing Systems of Anaerobic Baffled Reactor Treating Black-water from Households
Koottatep, Thammarat
"This paper presents the outcomes of pilot-scale experiments on anaerobic baffled reactor (ABR) and polishing systems for the treatment of domestic blackwater, aimed at determining the treatment performance of different integrated low-cost wastewater treatment systems, comprising one ABR as first treatment step followed by three polishing steps operated in parallel, namely an anaerobic filter an intermittent sand filter and a vertical flow constructed wetland. A mixture of septage and domestic wastewater was used as influent wastewater, resulting in influent chemical oxygen demand (COD) and biochemical oxygen demand (BOD) concentrations of 1,000 and 300 mg/L, respectively. The ABR system operated at a HRT of 48h could achieve average COD, suspended solids (SS) and total nitrogen (TN) removal efficiencies of 90%, 93% and 50%, respectively. The highest treatment performances in the sand filter and constructed wetland units were reached at HLR of 7 – 10 and 6 – 10 cm/day, respectively, while HRT in the range of 3 - 4 days led to the highest treatment efficiencies in the anaerobic filter. The national effluent standards of Thailand were respected by all systems in terms of average TSS and BOD concentrations. Rather than concluding which system is the most appropriate, the paper discusses specific fields of application for the different systems." Proceedings of the 7th Specialised Conference on Small Water and Wastewater Systems, 7-10 March 2006, Mexico City, Mexico Download
Comparative Health Impact Assessments on Faecal Sludge Management Practices: A Case Study of Klong Luang Municipality, Thailand
Yajima, A., Yajima, A.
Tha Klong sub district with indiscriminate FS dumping and Klong Luang municipality were selected. In order to determine health risks due to faecal management practices , the quantitiative Microbial risk Assessment (QMRA) was conducted by using microbial data of E.Coli and Salmonella spp. The result shows that estimated mean values of yearly infection risks from accidental ingestion of canal water in various scanario were higher than acceptable risk defined by WHO. Download
Assessment of on-site Sanitation Systems in Peri-urban Communities by Using Selected Sustainability Indicators
Jiawkok, Supattra
Master's Thesis, Asian Institute of Technology, Thailand In her MSc thesis, Supattra Jiawkok assessed the existing on-site sanitation systems treating black water in peri-urban communities including (i) the one-cesspool system, (ii) the two-cesspool system in series and (iii) the package tank system at Muaeng Klong Luang Municipality, Klong Luang district, Pathum Thani Province, Thailand. Download
Development of Database on Faecal Sludge Collection, Treatment and Disposal in Thachi, Chaopraya and Bangpakong River Basins, Thailand
Petchrat, Supapan
Master's Thesis, Asian Institute of Technology, Thailand "At present, Thailand does not have action plan and appropriate policy for Fecal Sludge (FS) management and lacking of data on FS collection, treatment and disposal. Nevertheless, FS management has become the responsibility of local authorities. The purpose of this study is to develop database on FS collection, treatment and disposal in three main river basins in central plain of Thailand, namely, Thachin, Chaopraya and Bangpakong." Download
Situationale, personale und soziale Faktoren, welche die Absicht ein flussschützendes Szenario zu unterstützen, beeinflussen
Schnellmann, Ursula
Master's Thesis, University of Zurich, Switzerland The MSc thesis describes the factors influencing the preferences of different scenarios for the Tha Chin River in Thailand developed with Material Flux Analysis. The results show that the scenario views, the subjective social norms, the benefit aspects as well as the internal responsibility attribution are predictors of the intent of stakeholders to support specific scenarios for improvement of water quality. Download
Modelling the Water and Nutrient Flows of Freshwater Aquaculture in Thailand
Wittmer, Irene
Master's Thesis, Swiss Federal Institute of Technology Zurich, Switzerland "The Tha Chin River Basin (central Thailand) faces major water quality problems. Among others, freshwater aquaculture was identified to be one of the pollution sources. This study looks at nutrient loads coming from freshwater aquaculture systems in the area. A model based on a material flow analysis was set up to quantify the loads to canals and rivers as well as to identify the key factors (parameters) that influence the system. The focus was placed on four different major cultivation systems. For all four considered systems, the amount of feed and nutrient concentrations in feed have the highest influence on the nutrient loads to the canal. [...]" Download
Material Flux Analysis for Waste and Wastewater Management Planning
Sinsupan, Thitiphon
Master's Thesis, Asian Institute of Technology, Thailand This thesis describes problems as well as potential solutions in the field of environmental sanitation based on the analysis of nitrogen flows in the city of Pakkret, Thailand. Download
Removal of Linear Alkylbenzene Sulfonate (LAS) from greywater by using constructed wetlands
Huynh, Thi Cam Hong
Master's Thesis at Asian Institute of Technology Download
Water Quality Assessment and Analysis in the Tha Chin River Basin, Thailand
Bieri, Franziska
The thesis investigates into the relation between river water quality, land-use and nutrient pollution processes in Tha Chin River Basin, and aims at obtaining a spatial and temporal overview on water quality. The results allow a preliminary identification of key parameters and priority areas for remedial actions. Download
Modeling non-point source pollution from rice farming in the Thachin River Basin
Schaffner, Monika
With the worldwide intensification of agriculture, non-point source pollution of surface waters has become a pressing issue. Conventional river water quality models consider non-point sources as accumulated entries into the rivers and do not investigate into the processes generating the pollution at its source, thus preventing the determination of effective mitigation measures. The models require extensive data inputs, which is a deficiency in many developing and emerging countries with limited data availability. The current study applies a Material Flow Model as a complementary approach to quantify non-point source pollution from agricultural areas. Rice farming in the Thachin River Basin is presented as a case study, with a focus on nutrients. The total nitrogen and phosphorus flows from rice farming to the river system are quantified, the key parameters influencing these flows are determined and potential mitigation measures are discussed. The results show that rice contributes considerable nutrient loads to the Thachin River Basin. Scenario simulations demonstrate that a significant nutrient load reduction could be achieved by following the official recommendations for fertilizer application, thus confirming the local efforts to introduce best management practice. Our results underline the importance of non-point source pollution control in intensive agricultural areas, particularly of tropical lowland delta areas such as the Central Plains of Thailand. The specific benefit of applying a Material Flow Model in this context is that with limited data availability, one can reach an understanding of the system and gain a first overview over its key pollution problems. This can serve as supportive basis for determining consecutive in-depth research requirements. Paper available at: http://www.springerlink.com/content/2630616v30q61506/?MUD=MP
Integrated faecal sludge treatment and recycling through constructed wetlands and sunflower plant irrigation
Koottatep, Thammarat
"Faecal sludge (FS) from the on-site sanitation systems is a nutrient-rich source but can contain high concentrations of toxic metals and chemicals and infectious micro-organisms. The study employed 3 vertical-flow CW units, each with a dimension of 5×5×0.65 m (width×length×media depth) and planted with cattails (Typha augustifolia). At the solid loading rate of 250 kg total solids (TS)/m2.yr and a 6-day percolate impoundment, the CW system could achieve chemical oxygen demand (COD), TS and total Kjeldahl nitrogen (TKN) removal efficiencies in the range of 80–96%. A solid layer of about 80 cm was found accumulated on the CW bed surface after operating the CW units for 7 years, but no clogging problem has been observed. The CW percolate was applied to 16 irrigation sunflower plant (Helianthus annuus) plots, each with a dimension of 4.5×4.5 m (width×length). In the study, tap water was mixed with 20%, 80% and 100% of the CW percolate at the application rate of 7.5 mm/day. Based on a 1-year data in which 3 crops of plantation were experimented, the contents of Zn, Mn and Cu in soil of the experimental plots were found to increase with increase in CW percolate ratios. In a plot with 100% of CW percolate irrigation, the maximum Zn, Mn and Cu concentrations of 5.0, 12.3 and 2.5 mg/kg, respectively, were detected in the percolate-fed soil, whereas no accumulation of heavy metals in the plant tissues (i.e. leaves, stems and flowers) of the sunflower were detected. The highest plant biomass yield and oil content of 1000 kg/ha and 35%, respectively, were obtained from the plots fed with 20% or 50% of the CW percolate." Water Science and Technology 2006, Vol. 54, No. 11-12, pp. 155–164 Available from: IWA Publishing
Using a Material Flow Analysis Model to Assess River Water Quality Problems and Mitigation Potentials
Schaffner, Monika
"The Material Flow Analysis carried out for Tha Chin River Basin is illustrated by an in-depth study on nutrient contributions from aquaculture." Download
Modeling the contribution of pig farming to pollution of the Thachin River
Schaffner, Monika
Rapid growth of the livestock production sector in South-East Asia during recent decades has led to a widespread degradation of ground and surface waters. The Thachin River Basin in Central Thailand serves as a case study for investigating the origins and pathways of nutrient loads produced by intensive pig farming. A mathematical material flow analysis is used to identify key nitrogen flows and the main parameters determining them. Scenarios of the potential for reducing these flows and achieving compliance with current discharge regulations are investigated. The results show that liquid waste discharged from large pig farms and directly discharged waste from small farms are the key nitrogen flows to the river system. The key driving forces are not only the treatment coverage and efficiencies but also the rate of reuse and recycling of the treated product. Paper available at: http://www.springerlink.com/content/l72t1878k2075942 Year of Publication: 2009