Marine-based waste stabilisation ponds: an evaluation of the hydraulic viability

2001 ◽  
Vol 43 (11) ◽  
pp. 283-290 ◽  
Author(s):  
R. Burrows ◽  
K. H. M. Ali ◽  
R. G. Tickell ◽  
T. S. Hedges ◽  
H. W. Pearson ◽  
...  
Keyword(s):  
Low Cost ◽  
Far East ◽  
Effluent Treatment ◽  
Scale Model ◽  
Waste Stabilisation Ponds ◽  
Coastal Cities ◽  
Site Evaluation ◽  
Treatment Facilities ◽  
The Third World ◽  
A Site

Marine-Based Waste Stabilisation Ponds, formed by floating boom/skirt curtain enclosures anchored in sheltered waters, have recently been proposed for provision of low-cost effluent treatment facilities where land availability is limited in rapidly expanding coastal cities in the Third World. This paper outlines findings from a viability assessment, which drew on a preliminary site evaluation and baseline environmental survey (for a site in sheltered waters in the Far East), laboratory studies involving scale model tests in wave/wind/current flumes, and a structural and design loading study. It focuses on hydraulic and hydrodynamic considerations and reports the study's conclusions.

The Treatment of Oil in Refinery Wastewater in South East Asia

1986 ◽  
Vol 18 (3) ◽  
pp. 17-21 ◽  
Author(s):  
R. A. Radevsky ◽  
D. A. Burt
Keyword(s):  
Pollution Control ◽  
Low Cost ◽  
Treatment Plant ◽  
Oil Industry ◽  
Effluent Treatment ◽  
Pollution Levels ◽  
Effluent Treatment Plant ◽  
Treatment Facilities ◽  
Correct Application

In response to more severe pollution control regulations and from a desire to reduce pollution levels, oil industry installations are having to re-examine their effluent treatment facilities. Options for upgrading the quality of effluent discharged include: improvements in water management to decrease volumes of effluent produced in processes; modifications to existing effluent treatment plant both in performance and operating procedures by the installation of new components or the replacement of individual units; and the installation of completely new effluent treatment facilities using the latest technology. In most existing plants considerable increases in efficiency can be brought about at relatively low cost by the correct application of a range of options. Where new installations are being constructed valuable lessons may be learned by examining the problems that are occurring in plants already in operation. Improvements may thus be made on existing designs.

scholarly journals Design and Development of a Low Cost Personal Computer Based ECG Monitor

2013 ◽  
Vol 4 (1) ◽  
pp. 115-125 ◽  
Author(s):  
K Siddique-e Rabbani ◽  
A Raihan Abir ◽  
AKM Bodiuzzaman
Keyword(s):  
Service Providers ◽  
Human Subjects ◽  
Medical Physics ◽  
Low Cost ◽  
Large Population ◽  
Telemedicine System ◽  
The Rich ◽  
Safety Features ◽  
The Third World ◽  
The Cost

ECG equipment is vital for diagnosis of cardiac problems. However, such equipment come from the rich Western countries at a huge cost in both procurement and maintenance, and therefore cannot offer services to a large population in the Third World countries. The only solution is to design and develop such equipment in individual countries by developing local expertise. With three decades of experience, the Dhaka University group has taken a step towards developing prototypes of ECG equipment for dissemination to the healthcare service providers. This paper presents the detailed design of an PC based ECG equipment where optimized choice of components and of the design have been made keeping the cost and maintenance in view, but not sacrificing the quality, and incorporating necessary safety features to protect the patient from known hazards. Both the hardware and the software have been developed locally and are detailed in this paper. Outputs obtained from human subjects are shown which are of reasonable good quality, and have been verified using standard ECG equipment. The PC based ECG system will allow digital post processing of signals for improved diagnosis through software. Besides, this can also become part of a nationwide telemedicine system. DOI: http://dx.doi.org/10.3329/bjmp.v4i1.14701 Bangladesh Journal of Medical Physics Vol.4 No.1 2011 115-125

scholarly journals Variational data assimilation with superparameterization

2015 ◽  
Vol 2 (2) ◽  
pp. 513-536 ◽  
Author(s):  
I. Grooms ◽  
Y. Lee
Keyword(s):  
Data Assimilation ◽  
Large Scale ◽  
Climate Models ◽  
Low Cost ◽  
Ocean Model ◽  
Variational Data Assimilation ◽  
Scale Model ◽  
Small Scale ◽  
New Applications ◽  
Lorenz 96

Abstract. Superparameterization (SP) is a multiscale computational approach wherein a large scale atmosphere or ocean model is coupled to an array of simulations of small scale dynamics on periodic domains embedded into the computational grid of the large scale model. SP has been successfully developed in global atmosphere and climate models, and is a promising approach for new applications. The authors develop a 3D-Var variational data assimilation framework for use with SP; the relatively low cost and simplicity of 3D-Var in comparison with ensemble approaches makes it a natural fit for relatively expensive multiscale SP models. To demonstrate the assimilation framework in a simple model, the authors develop a new system of ordinary differential equations similar to the two-scale Lorenz-'96 model. The system has one set of variables denoted {Yi}, with large and small scale parts, and the SP approximation to the system is straightforward. With the new assimilation framework the SP model approximates the large scale dynamics of the true system accurately.

Assessing Trustworthiness of Crowdsourced Flood Incident Reports Using Waze Data: A Norfolk, Virginia Case Study

2021 ◽  
pp. 036119812110312
Author(s):  
Shraddha Praharaj ◽  
Faria Tuz Zahura ◽  
T. Donna Chen ◽  
Yawen Shen ◽  
Luwei Zeng ◽  
...  
Keyword(s):  
Real Time ◽  
Low Cost ◽  
Storm Surges ◽  
Mitigation Measures ◽  
Coastal Cities ◽  
Crowdsourced Data ◽  
Report Data ◽  
Incident Data ◽  
Flooding Events

Climate change and sea-level rise are increasingly leading to higher and prolonged high tides, which, in combination with the growing intensity of rainfall and storm surges, and insufficient drainage infrastructure, result in frequent recurrent flooding in coastal cities. There is a pressing need to understand the occurrence of roadway flooding incidents in order to enact appropriate mitigation measures. Agency data for roadway flooding events are scarce and resource-intensive to collect. Crowdsourced data can provide a low-cost alternative for mapping roadway flood incidents in real time; however, the reliability is questionable. This research demonstrates a framework for asserting trustworthiness on crowdsourced flood incident data in a case study of Norfolk, Virginia. Publicly available (but spatially limited) flood incident data from the city in combination with different environmental and topographical factors are used to create a logistic regression model to predict the probability of roadway flooding at any location on the roadway network. The prediction accuracy of the model was found to be 90.5%. When applying this model to crowdsourced Waze flood incident data, 71.7% of the reports were predicted to be trustworthy. This study demonstrates the potential for using Waze incident report data for roadway flooding detection, providing a framework for cities to identify trustworthy reports in real time to enable rapid situation assessment and mitigation to reduce incident impact.

Agency, Gender Identities, and Clothing Consumption

2016 ◽  
pp. 136-156
Author(s):  
Fatema Rouson Jahan
Keyword(s):  
Third World ◽  
White Women ◽  
Factory Workers ◽  
Garment Workers ◽  
Garment Factories ◽  
Consumption Practices ◽  
Global North ◽  
Women's Role ◽  
The Third World ◽  
A Site

The chapter critically analyses the discourses on global factory workers that rest on three assumptions. First, the discussions of production are centred on stories of victimhood and produce a homogeneous image of third world workers as cheap and docile, who are affected by global labour market dynamics similarly and equally. Second, the third world is always theorised as a site of production and women factory workers are always positioned as sweatshop workers and never as consumers. Third, women's role as consumers appears only in relation to white women from the global north, who are assumed to have more purchasing power. Third world workers' consumption practices have been largely overlooked. The chapter problematises some of these assumptions. It proposes to look at the gender dynamics in the lives of women workers in global garment factories with a focus on their clothing consumption in order to further an approach that acknowledges the heterogeneity and agency of garment workers.

Appropriate Wastewater Treatment and Reuse in Morocco – Boujad: A Case Study

1991 ◽  
Vol 24 (9) ◽  
pp. 205-213 ◽  
Author(s):  
S. B. Niedrum ◽  
A. Karioun ◽  
D. D. Mara ◽  
S. W. Mills
Keyword(s):  
Public Health ◽  
Local Community ◽  
Sewage Treatment ◽  
Microbiological Quality ◽  
Crop Productivity ◽  
Waste Stabilisation Ponds ◽  
Fertilizer Value ◽  
Untreated Wastewater ◽  
Hot Arid Climate ◽  
Treatment Facilities

Reuse of wastewater for crop irrigation is essential to sustain agricultural growth in a country such as Morocco where water resources are scarce due to the hot, arid climate. However few towns in Morocco have sewage treatment facilities and reuse with untreated wastewater is therefore widespread, and the public health risks from excreta related disease high. A suitable treatment system to provide safe water for irrigation is the use of waste stabilisation ponds, which provide an effluent high in microbiological quality and also high in fertilizer value due to the large amounts of algae which are normally discharged. It was therefore decided to implement an integrated waste stabilisation pond, effluent reuse system as a demonstration scheme of the advantages, both in terms of improved crop productivity and public health of the local community. The town of Boujad in Kouribga Province was selected as a suitable site and this paper describes the background to the development.

scholarly journals Facile and low-cost synthesis of pure hematite (α-Fe2O3) nanoparticles from naturally occurring laterites and their superior adsorption capability towards acid-dyes

RSC Advances ◽  
2019 ◽  
Vol 9 (37) ◽  
pp. 21249-21257 ◽  
Author(s):  
D. M. S. N. Dissanayake ◽  
M. M. M. G. P. G. Mantilaka ◽  
T. C. Palihawadana ◽  
G. T. D. Chandrakumara ◽  
R. T. De Silva ◽  
...  
Keyword(s):  
High Purity ◽  
Low Cost ◽  
Effluent Treatment ◽  
Fe2o3 Nanoparticles ◽  
Acid Dyes ◽  
Hematite Nanoparticles ◽  
Naturally Occurring ◽  
Adsorption Capability

High purity hematite nanoparticles have been synthesized by a facile method using naturally occurring laterites for industrial dye effluent treatment applications.

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