Strategies for decentralized wastewater management for gas stations using membrane bioreactor | |
| Author | Preeyamat Ma-on |
| Call Number | AIT Thesis no.EV-15-19 |
| Subject(s) | Water--Waste--Management Membrane reactors Service stations |
| 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 |
| Series Statement | Thesis ; no. EV-15-19 |
| Abstract | At the premium gas stations in Thailand, wastewater is generated from various service facilities with different characteristics. Wastewater from coffee shops, restaurants and toilets were assessed in term of quality and quantity. The major wastewater at gas station was the toilet wastewater. Membrane bioreactor (MBR) system coupling PLC and remote control system for monitoring online system was designed to treat the toilet wastewater. The optimum operational conditions of MBR system were assessed and strategies were recommended for decentralized wastewater management. MBR system using PTFE hallow fiber membrane (pore size of 0.1 μm) was installed to filter treated wastewater. The air scouring and backwash was conducted for membrane cleaning. Initially, the MBR system operated with synthetic wastewater with COD : N : P ratio of 100: 5 : 1. Then the real wastewater (COD : P : N was 100 : 80 : 6) was used to optimize the hydraulic relation time (HRT). In the real wastewater, nitrogen was treated using the nitrification and denitrification process. At HRT 8, nitrogen removal efficiency was higher than 99%. Ferric chloride was added to precipitate phosphorus. In MBR system, phosphorus removal efficiencies of 87 %, COD of 94 % and yellowish permeate of 60 Color Unit (CU). Overall, the optimum HRT of 8 and ferric chloride addition was suggested for treating wastewater for reuse application. The remote control system was recommended to monitor the MBR system which was developed to become the decentralized wastewater treatment plant. |
| Year | 2015 |
| 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) | Visvanathan, C.; |
| Examination Committee(s) | Annachhatre, Ajit P.;Shipin, Oleg V.; |
| Scholarship Donor(s) | Royal Thai Government;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2015 |