Evaluating the Willingness to Pay for Using Recycled Water for Irrigation

Financial and Economic Investment Evaluation of Wastewater Treatment Plant

Improved Cost-Benefit Analysis (CBA) analysis requires a broader analytical framework, in order to perceive each project individually from the perspective of potentially measurable and significant effects on the environment and society as a whole. The main goal of our paper is to assess the financial and economic justification for variant V3 (as the most technically optimal) of the wastewater treatment plant (WWTP) construction project in Nov Dojran, North Macedonia, with the purpose of advancing municipal infrastructure and environmental benefits from improved water treatment. Based on the economic analysis conducted, we conclude that the investment in the WWTP project is justified, because the economic internal rate of return is higher than the opportunity cost of capital (EIRR = 16.38%), the economic net present value is higher than 0, and EBCR (benefit-cost ratio) is greater than 1 (EBCR = 2.11). The highest environmental benefit of 49.2% in total environmental benefits is associated with nitrogen, while phosphorus is the next pollutant in the structure of environmental benefits at 46.1%. The environmental benefits of removing biological oxygen demand (BOD) and chemical oxygen demand (COD) are significantly less important, despite the removal of significant amounts of these pollutants during treatment. The situation is similar with suspended particles.

The effect of recycled water information disclosure on public acceptance of recycled water-Evidence from residents of Xi'an, China

Recycled water, the secondary water source of a city, is vital to alleviate regional water resource shortage and promote environmental conservation. The attitude and acceptance toward recycled water of the public, its direct user, hold the key to the implementation of a recycled water project. Currently, the public's low intention of using recycled water constitutes the biggest obstacle to its popularization. To identify the factors of public acceptance of recycled water and their influence path, this study analyzes the effect mechanism of information disclosure of recycled water on the public's acceptance of it based on the consciousness-context-behavior theory and by adopting a structural equation model. The results are as follows: (1) The public's consciousness of water saving, risk perception of recycled water, and consciousness of environmental responsibility can effectively promote public acceptance of recycled water; (2) The consciousness of water saving and that of environmental responsibility have a significant effect on public acceptance of recycled water, and so do the consciousness of water saving and the risk perception of recycled water; and (3) Recycled water information disclosure has the most significant regulatory effect on consciousness and public acceptance.

Supporter Profiling in Recycled Water Reuse: Evidence from Meta-Analysis

Recycled water is considered as a viable alternative water source, and its use is of great significance in dealing with the shortage of water resources. However, it is often rejected by the public during its promotion. To identity the common social attributes of proponents of recycled water, it is essential to study the profiled customers’ willingness to accept recycled water during the most difficult initial stage of promoting recycled water use projects. A meta-analysis was conducted in this study to deal with data concerning the influence of different social demographic factors on the public’s acceptance of recycled water use. Three steps of meta-analysis were mainly used in this paper. First, a random-effect model was used to measure the effect size of influencing factors, such as age, gender, and education. It was found that younger women were more likely to accept recycled water use than older men, and individuals with higher education were more willing to accept recycled water. Then, a cumulative meta-analysis showed that it was feasible to select young women with higher education as target profile customers in the initial stage of recycled water promotion. Finally, according to a meta-regression analysis, it was revealed that different research areas and selected model methods have important regulatory effects on the intention of the target population to use recycled water.

Valuing Households’ Willingness to Pay for Water Transfers from the Irrigation Sector: A Case Study of the City of Seville (Southern Spain)

Water scarcity is increasing in many countries worldwide, and conflicts between alternative uses have arisen due to the high demand and the effects of climate change, among other factors. This paper employs a contingent valuation (CV) method to determine households’ willingness to pay (WTP) compensation to the irrigation sector to guarantee urban supply reliability under extreme water-scarcity conditions (e.g., during a drought period) through inter-sectoral water transfers. The data was obtained from a survey covering 250 households in the city of Seville. In order to estimate households’ WTP, a double-bounded approach is used. Results show that the average WTP would be between 2.53 and 2.59 euros (on a monthly basis), which would represent a viable annual water transfer of 14.3 Hm3 from the irrigation sector, which would be compensated accordingly. This study shows that inter-sectoral water transfers should be considered a viable adaptation measure to manage the consequences of water scarcity in urban areas.