Application of water pinch analysis for industrial water reuse : case studies in Rayong Province, Thailand | |
| Author | Nguyen Thi Mai Thanh |
| Call Number | AIT Thesis no.EV-08-24 |
| Subject(s) | Water reuse--Thailand--Rayong Factory and trade waste--Thailand--Rayong |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | The study has been conducted to identify the reuse potential of wastewater from industries at 3 different scales: small, large and water reuse between selected factories by application of water pinch analysis (WPA). As an outcome, limitations of applying WPA in different scales were evaluated. Case studies support the study were selected from the Eastern Seaboard Industrial Estate and the Eastern Industrial Estate included one steel factory, one chemical factory and one electronic factory for the small scale, and one terephthalic factory for the large scale. The water reuse potential between factories was examined with those 3 small scale factories. Each case study was selected limiting constrains with two parameter for each, included pH and either TSS or TDS, except the case of the electronic factory and water reuse between factories in which only pH is available for using Water Surplus Diagram. The results shows that there is different water reuse potential at different scale of industry. For water reuse within factory, its potential is not depended on scale but type of factory. Among the 3 small scale factories, the steel factory has highest potential, 48.5%, the electronic factory's potential is slightly less, 44%, and the chemical factory has lowest, only 20%, when that are analyzed by WPA with the same limiting constrain of pH. The terephthalic acid factory also has 15% of water reuse although this is large scale. For water reuse between factories, the potential increases up to 56.3% when pH was examined as limiting constrain. WPA gives different results of water reuse potential when different parameters are selected as limiting constrain. In the case of the steel factory, 68% and 48.5% of fresh water can be reduced as results achieved from WPA when pH and TSS are considered respectively. Similarly, in the case of the terephthalic factory, WPA in term of pH give results of 15% of fresh water reduction while TSS is not a limiting constrain. Whenever regeneration is applied, it is able to increase potential of water reuse. The study shows that reuse potential would increase from 68% to 99.7% in term of the limiting constrain pH, and 48.5% to 58.5% in term of TSS in the case of the steel plant. Results from the electronic factory also show an increasing from 44% to 63.3% when pH adjustment is applied. And in the case of terephthalic acid, pH adjustment would help to increase water reuse potential from 15% to 32%. Thus, WPA is a useful tool for water reuse potential estimation. However, still there are many limitations. Result of WPA may be impractical for factories in which water flowrate is small. Besides, if a WPA is applied, many parameters should be selected as limiting constrain. The more limiting constrain contaminants are considered, the more truthful result could be achieved. |
| Year | 2008 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Thammarat Koottatep; |
| Examination Committee(s) | Visvanathan, C.;Vilas Nitivattananon; |
| Scholarship Donor(s) | Ministry of Education and Training (MOET), Vietnam;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2008 |