## 3 Results and Discussion
### Cost-Benefit Analysis of Water Reclamation Projects for Industrial Water Supply
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Discount Rate**} & \multicolumn{3}{c}{**5200 m\({}^{3}\)/d**} & \multicolumn{3}{c}{**10,000 m\({}^{3}\)/d**} & \multicolumn{3}{c}{**15,000 m\({}^{3}\)/d**} & \multicolumn{3}{c}{**25,000 m\({}^{3}\)/d**} \\ \cline{2-9}  & **Exclude EB** & **Include EB** & **Exclude EB** & **Include EB** & **Exclude EB** & **Include EB** & **Exclude EB** & **Include EB** \\ \hline
3\% & 31.78 & 25.28 & 30.23 & 23.73 & 29.73 & 23.23 & 29.93 & 23.43 \\ \hline
5\% & 32.77 & 26.27 & 30.93 & 24.42 & 30.33 & 23.83 & 30.56 & 24.06 \\ \hline
7\% & 33.85 & 27.35 & 31.67 & 25.17 & 30.97 & 24.47 & 31.25 & 24.75 \\ \hline
9\% & 35.00 & 28.50 & 32.49 & 25.97 & 31.66 & 25.16 & 31.99 & 25.49 \\ \hline
11\% & 36.24 & 29.73 & 33.33 & 26.82 & 32.39 & 25.88 & 32.76 & 26.26 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Minimum selling price of reclaimed water (THB) for water reclamation projects for industrial water supply when including and excluding environmental benefits (EB). Figure 5: Payback periods (PPs) for water reclamation projects for industrial water supply when including and excluding environmental benefits (EB). have to intervene to support such projects. Recommendations for governmental support are discussed in Section 3.4. Similarly, the cost-effectiveness analysis conducted by [PERSON] et al. (2011) [27] found that financial support in the form of a capital grant and a 0% interest loan was required for industrial water reuse projects to be financially feasible. Water reuse options were found to be more expensive than other water supply options available in the region under study (Port Melbourne, Australia). Therefore, financial assistance should be offered to businesses as an incentive to implement water reuse projects [26]. The CBA of water reclamation projects using effluents from municipal WWTPs in Beijing, China, was conducted by [PERSON] et al. (2015) [16]. In their study, reclaimed water (680 million m\({}^{3}\) in 2010) was used for industrial reuse (20%), agricultural irrigation (47%), environmental reuse (30%), and miscellaneous urban reuse (3%). Both internal costs and benefits as well as positive and negative externalities, including environmental benefits, public health impacts, and groundwater recharge and pollution, were considered in the CBA [16]. The CBA revealed a relatively high BCR of 1.7 when externalities were included, providing further incentives for project implementation. The environmental benefits of water reuse in a model industrial park were previously analyzed using LCA for several environmental categories, including climate change, freshwater eutrophication, marine eutrophication, and resource depletion (minerals, fossils, renewables, as well as water) [27]. All water reuse options in the industrial park, which was assumed to be located in Germany, provided environmental benefits for all environmental categories, except resource depletion. Similarly, using LCA, [PERSON] et al. (2013) [19] evaluated the environmental impacts of water reuse in an industrial park in China. Their results revealed the environmental benefits of water reuse. The LCA conducted in previous studies clearly demonstrated the environmental benefits of water reuse in industrial parks. The results of our study reemphasize the importance of the environmental benefits associated with water reclamation projects, which, when factored into the CBA, can strongly influence economic feasibility.