Cost–benefit evaluation of a decentralized water system for wastewater reuse and environmental protection

2009 ◽  
Vol 59 (8) ◽  
pp. 1515-1522 ◽  
Author(s):  
R. Chen ◽  
X. C. Wang
Keyword(s):  
Wastewater Reuse ◽  
Water System ◽  
Cost Benefit ◽  
Local Environment ◽  
Environmental Benefits ◽  
Net Benefit ◽  
Benefit Evaluation ◽  
Proposed Model ◽  
Project Costs ◽  
The Cost

This paper proposed a net benefit value (NBV) model for cost–benefit evaluation of wastewater treatment and reuse projects, and attention was mainly paid to decentralized systems which are drawing wide interests all over the world especially in the water-deficient countries and regions. In the NBV model, all the factors related to project costs are monetary ones which can be calculated by using traditional methods, while many of the factors related to project benefits are non-monetary ones which need sophisticated methods for monetization. In this regard, the authors elaborated several methods for monetization of the benefits from wastewater discharge reduction, local environment improvement, and human health protection. The proposed model and methods were applied for the cost–benefit evaluation of a decentralized water reclamation and reuse project in a newly developed residential area in Xi'an, China. The system with dual-pipe collection and grey water treatment and reuse was found to be economically ineligible (NBV > 0) when all the treated water is reused for artificial pond replenishment, gardening and other non-potable purposes by taking into account the benefit of water saving. As environmental benefits are further considered, the economic advantage of the project is more significant.

The cost–benefit evaluation based on ecosystem services under different ecological restoration scenarios

2021 ◽  
Vol 193 (7) ◽  
Author(s):  
Mingqi Li ◽  
Shiliang Liu ◽  
Yixuan Liu ◽  
Yongxiu Sun ◽  
Fangfang Wang ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Ecological Restoration ◽  
Cost Benefit ◽  
Benefit Evaluation ◽  
The Cost

scholarly journals Cost-benefit Analysis of Seedling Production on Floating Beds in a Few Selected Areas of Bangladesh

2019 ◽  
Vol 7 (2) ◽  
pp. 75
Author(s):  
Mohammod Akbar Kabir ◽  
Md. Moniruzzaman ◽  
Kawsar Jahan ◽  
Md. Shahjahan
Keyword(s):  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Sampling Technique ◽  
Primary Data ◽  
Seedling Production ◽  
Benefit Analysis ◽  
Net Benefit ◽  
Government Aid ◽  
Combat Climate Change ◽  
The Cost

The aim of this study was to calculate the cost benefit analysis and economic viability of seedling production on the floating bed at Nazirpur Upazila in Pirojpur district of Bangladesh. The study area was selected purposively and 50 households (HHs) were surveyed through purposive sampling technique from a population of 80 households. From the results of those primary data, it was found that 68% farmers were engaged in seedling production as business purpose, and 30% as both own and business, 21 vegetables and spices seedlings were cultivated in the studied area. Average per square meter cost for floating seedling cultivation found BDT (Bangladeshi taka) 281 and benefit was BDT 401. The net benefit of floating agriculture found BDT 120 and with a BCR of 1.43. Income from floating seedlings mainly utilized in winter vegetable cultivation (Kandi), mainstream agriculture, business, house development and land purchase etc. Fifty percent (50%) of the floating farmers mentioned various constraints regarding floating seedling production such as lack of government aid, higher interest from NGOs and lack of capital. Among the surveyed respondents, 64% agreed that floating cultivation is effective to combat climate change and 76% replied as beneficial to the environment. Although floating agriculture is an indigenous age-old practice in the South-western region of Bangladesh, it can be replicated with the help of subsidy and agro-technology.

Environmental costs and their impact on the net present value of a hydro-electric project in Kerala, India

2003 ◽  
Vol 8 (2) ◽  
pp. 311-330 ◽  
Author(s):  
V. Santhakumar ◽  
Achin Chakraborty
Keyword(s):  
Net Present Value ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Environmental Costs ◽  
Benefit Analysis ◽  
Costs And Benefits ◽  
Net Benefit ◽  
Pulp Industry ◽  
The Social ◽  
The Cost

This paper presents the operational procedures involved in incorporating the environmental costs in the cost–benefit analysis of a hydro-electric project. The proposed project, if implemented, would result in the loss of 2,800 hectares of tropical forests and dislocation of two settlements of about 200 families who are currently dependent on the forests for their livelihood. The forests are mainly used for extracting reed – a material used both by traditional artisans and the paper-pulp industry. The potential environmental costs and benefits of the project are identified and approximate estimates of some of these costs are made for items such as carbon sequestration, bio-diversity, and so on, based on similar estimates made elsewhere. These estimated environmental costs are incorporated into the analysis, and the hypothetical estimate of the non-use value, which would make the project's net benefit zero, is estimated under different discount rates. The analysis brings into sharp focus some crucial factors that have a direct bearing on the social trade-off involved in the project choice.

scholarly journals A Cost-Benefit Analysis of Gown Use in Controlling Vancomycin-ResistantEnterococcusTransmission Is It Worth the Price?

2004 ◽  
Vol 25 (5) ◽  
pp. 418-424 ◽  
Author(s):  
Laura A. Puzniak ◽  
Kathleen N. Gillespie ◽  
Terry Leet ◽  
Marin Kollef ◽  
Linda M. Mundy
Keyword(s):  
Infection Control ◽  
Nosocomial Infections ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Base Case ◽  
Benefit Analysis ◽  
Net Benefit ◽  
Control Policies ◽  
Services Delivery ◽  
The Cost

AbstractObjective:To determine the net benefit and costs associated with gown use in preventing transmission of van-comycin-resistantEnterococcus(VRE).Design:A cost-benefit analysis measuring the net benefit of gowns was performed. Benefits, defined as averted costs from reduced VRE colonization and infection, were estimated using a matched cohort study. Data sources included a step-down cost allocation system, hospital informatics, and microbiology databases.Setting:The medical intensive care unit (MICU) at Barnes-Jewish Hospital, St. Louis, Missouri.Patients:Patients admitted to the MICU for more than 24 hours from July 1, 1997, to December 31, 1999.Interventions:Alternating periods when all healthcare workers and visitors were required to wear gowns and gloves versus gloves alone on entry to the rooms of patients colonized or infected with VRE.Results:On base-case analysis, 58 VRE cases were averted with gown use during 18 months. The annual net benefit of the gown policy was $419,346 and the cost per case averted of VRE was $1,897. The analysis was most sensitive to the level of VRE transmission.Conclusions:Infection control policies (eg, gown use) initially increase the cost of health services delivery. However, such policies can be cost saving by averting nosocomial infections and the associated costs of treatment. The cost savings to the hospital plus the benefits to patients and their families of avoiding nosocomial infections make effective infection control policies a good investment.

scholarly journals Approaches and Application of Comparative Risk Assessment Concepts to Oil Spill Preparedness Planning and Response

2003 ◽  
Vol 2003 (1) ◽  
pp. 59-61 ◽  
Author(s):  
Igor Linkov ◽  
Jim R. Clark
Keyword(s):  
Risk Assessment ◽  
Oil Spill ◽  
Oil Spills ◽  
Cost Benefit ◽  
Environmental Policies ◽  
Comparative Risk Assessment ◽  
Preparedness Planning ◽  
Benefit Evaluation ◽  
Comparative Risk ◽  
The Cost

ABSTRACT Comparative Risk Assessment (CRA) is emerging as a methodology that may be applied to facilitate decision-making when various possible activities compete for limited resources. The CRA framework may be an especially valuable tool for prioritization of remediation efforts and for making choices among various environmental policies specific to oil industry operations. This paper will show that CRA is an efficient and cost-saving tool that assists in developing oil spill response priorities based on the broadest possible range of concerns and issues important to all stakeholders. In addition, the CRA approach allows the cost/benefit evaluation of alternative environmental policies and strategies relative to the baseline risks and disruptions associated with oil spills (as well as other costs and benefits of petroleum use).

scholarly journals ESTUDO DE VIABILIDADE ECONÔMICO-FINANCEIRA DA RECICLAGEM DE CONSTITUINTES DE RESÍDUOS DE CONSTRUÇÃO E DEMOLIÇÃO

2020 ◽  
Vol 15 (2) ◽  
pp. 179-191
Author(s):  
Felippe Martins Damaceno ◽  
Francieli Helena Bernardi ◽  
Victor Hugo Stormovski Cesar
Keyword(s):  
Net Present Value ◽  
Cost Benefit ◽  
Cash Flows ◽  
Environmental Benefits ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Cost Benefit Ratio ◽  
The Cost ◽  
Financial Profitability ◽  
Recycled Material

RESUMO:  O objetivo deste trabalho consistiu em avaliar a viabilidade econômico-financeira de empreendimentos de construção e demolição realizarem a reciclagem de fragmentos de concreto e cerâmica. Para tal, foram projetados quatro cenários econômicos considerando construtoras responsáveis pela geração de diferentes quantidades de resíduos de construção e demolição (RCD’s), nos quais foi orçada uma britadeira móvel para a reciclagem do material. Os custos relacionados à aquisição, operação e manutenção da britadeira, foram confrontados em fluxos de caixa, com as receitas provenientes do uso ou venda do material reciclado na forma de brita n° 0, bem como da economia com caçambas de entulhos. Posteriormente, a rentabilidade dos projetos foi avaliada mediante o fator de recuperação do capital, o valor presente líquido e a taxa interna de retorno. Quanto maior a produção de RCD’s, maior também é a relação custo-benefício da aquisição da britadeira e, em função da maior quantidade de brita n° 0 reciclada (passível de ser utilizada na produção de contrapiso ou comercializada) e da maior economia com caçamba de entulhos, maiores são as receitas adquiridas, menor é o período de retorno do capital investido e maior é a rentabilidade financeira dos cenários projetados. A reciclagem de RCD’s além de proporcionar benefícios ambientais, pode ser um investimento financeiramente atrativo. ABSTRACT: The objective of this work was to evaluate the economic and financial feasibility of construction and demolition projects to carry out the recycling of concrete and ceramic fragments. For this, four economic scenarios were designed considering constructors responsible for the generation of different amounts of construction and demolition waste (RCD's), in which a mobile squeegee was used to recycle the material. The costs related to the acquisition, operation and maintenance of the crushing machine were compared to cash flows, with revenues from the use or sale of recycled material in the form of gravel No. 0, as well as the economy with litter bins. Subsequently, the profitability of the projects was evaluated by the capital recovery factor, the net present value and the internal rate of return. The higher the production of RCD’s, the greater the cost-benefit ratio of the purchase of the crushing machine and, due to the greater quantity of recycled crushed stone (which can be used in the production of sub-floor or commercialized) and the largest economy with a bucket of debris, the higher are the revenues acquired, the lower the return period of invested capital and the greater the financial profitability of the projected scenarios. Recycling RCD’s in addition to providing environmental benefits can be a financially attractive investment.

scholarly journals Implementation of A Structured Emergency Nursing Framework Results in Significant Cost Benefit

2021 ◽  
Author(s):  
Kate Curtis ◽  
Prabhu Sivabalan ◽  
David S. Bedford ◽  
Julie Considine ◽  
Alfa D’Amato ◽  
...  
Keyword(s):  
Cost Benefit ◽  
Emergency Nursing ◽  
Net Benefit ◽  
Patient Deterioration ◽  
South Wales ◽  
Financial Benefits ◽  
Implementation Costs ◽  
Study Sites ◽  
Cost Implications ◽  
The Cost

Abstract Background Patients are at risk of deterioration on discharge from an emergency department (ED) to a ward, particularly in the first 72 hours. The implementation of a structured emergency nursing framework (HIRAID) in regional New South Wales (NSW), Australia, resulted in a 50% reduction of clinical deterioration related to emergency nursing care. To date the cost implications of this are unknown. The aim of this study was to determine any net financial benefits arising from the implementation of the HIRAID emergency nursing framework. Methods This retrospective cohort study was conducted between March 2018 and February 2019 across two hospitals in regional NSW, Australia. Costs associated with the implementation of HIRAID at the study sites were calculated using an estimate of initial HIRAID implementation costs (AUD) ($492,917) and ongoing HIRAID implementation costs ($134,077). Equivalent savings (i.e. in less patient deterioration) were calculated using projected estimates of ED admission and patient deterioration episodes via OLS regression with confidence intervals for incremental additional deterioration costs per episode used as the basis for scenario analysis. Results The HIRAID-equivalent savings exceed the costs of implementation under all scenarios (Conservative, Expected and Optimistic). The estimated preliminary savings to the study sites was $1,914,252 with a payback period of 75 days. Conservative projections estimated a net benefit of $1,813,760 per annum by 2022-23. The state-wide projected equivalent savings benefits of HIRAID equalled $227,585,008 per annum, by 2022-23. Conclusions The implementation of HIRAID reduced costs associated with resources consumed from patient deterioration episodes. The HIRAID-equivalent savings exceed the costs of implementation across a range of scenarios, and upscaling would result in significant patient and cost benefit.

On the Optimization of Cholesterol Screening

1991 ◽  
Vol 30 (01) ◽  
pp. 36-43 ◽  
Author(s):  
J. H. Milsum
Keyword(s):  
Intervention Program ◽  
Cost Benefit ◽  
Total Serum ◽  
Total Serum Cholesterol ◽  
Costs And Benefits ◽  
Net Benefit ◽  
Cholesterol Screening ◽  
The Cost ◽  
Parameter Values ◽  
Marker Level

Total serum cholesterol is a major risk factor for Coronary Heart Disease (CHD). Some guidelines have been published regarding treatment levels. However, before implementing cholesterol screening, the costs and benefits should be analyzed as a function of cholesterol level. Analysis is readily implemented on microcomputer spreadsheets using decision tree analysis. Because it is very difficult to establish some of the costs satisfactorily, the facility of spreadsheets in performing sensitivity analysis is crucial. Here, plausible numerical values are used as “default” conditions for estimating in a preliminary way the costs and benefits of a putative screening-intervention program. The cost-benefit condition remains very close to optimal over the range 200-240 mg/dl for cholesterol marker level. The optimal condition may shift considerably when the default parameter values are altered. With the default values, the maximal net benefit is around 5% of the estimated current costs of CHD deaths without screening.

The Evaluation of a Hostel Ward

1987 ◽  
Vol 151 (6) ◽  
pp. 805-812 ◽  
Author(s):  
C. Hyde ◽  
K. Bridges ◽  
D. Goldberg ◽  
K. Lowson ◽  
C. Sterling ◽  
...  
Keyword(s):  
General Hospital ◽  
Cost Benefit ◽  
District General Hospital ◽  
Benefit Evaluation ◽  
Skills Use ◽  
The Cost

A controlled modified cost-benefit evaluation of a hostel ward caring for new long-stay patients is described and results are presented for the first two years. In some respects the residents of the hostel ward had fewer psychotic impairments than those remaining on the wards of the district general hospital, mainly because the latter seem to continue to acquire such defects, while the former have remained relatively unchanged. The hostel ward residents also develop superior domestic skills, use more facilities in the community, and are more likely to be engaged in constructive activities than controls. These advantages were not purchased at a price, since the cost of providing this form of care for these patients has cost less than care provided by the district general hospital.

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