Wastewater Treatment Guideline and Standard

Walailak University abides by the Enhancement and Conservation  of the National B.E. 2535 (1992) and all regulations issued by the Pollution Control Department. The university ensures that the wastewater treatment process has been in place since its operation. The Division of Landscape and Architecture and Environment of Walailak University also publishes a handbook on wastewater treatment and conducts wastewater quality testing with the collaboration of the scientist team at the university as instructed by the Notification of The National Environmental Board No.8, B.E.2537 (1994).

Besides, the Division of Landscape and Architecture and Environment utilizes treated wastewater in agriculture such as cultivating tilapia in earthen ponds and pig farming.

 In 2021, the UI Green Metric World University Ranking announced the rankings. Green World University 2021 out of 959 universities participating worldwide. As a result, Walailak University Ranked as the No. 1 Green University of the South of Thailand for 2 consecutive years and moved to 8th in the country and 116th in the world with a total score of 7,700 compared to last year’s 2020 rankings. 16th in the country and 219 in the world with a total score of 6,650 points.

The wastewater produced by Walailak University is from washing, bathing, dishes, laundry, and toilets. Walailak University has a method to dispose of sewage water for the environment and well-being of the community. In the case of blackwater, the university uses an underground septic tank set to dispose of it. The greywater is collected by the combined pipe system into the central wastewater treatment of the university. The central wastewater treatment plant uses an aerated lagoon, followed by pond stabilization. The treated wastewater characteristic is better than the wastewater standard, which was determined by the Pollution Control Department of Thailand. The treated water was utilized for watering a tree in the university area and fishing.

The Walailak University wastewater treatment system is designed to detain the wastewater at 4,000 m³/day. The system is the biological treatment, which consists of an aerated lagoon, two facultative ponds, a UV disinfection system, and a wetland. These are vessels in which the remaining treated wastewater is in ponds before draining into the reservoir.

Walailak University operates a water recycling program capable of treating 500-1000 cubic meters of water each day. 500 cubic meters of treated water are used each day for the following activities:

• Watering trees and flowers in the vicinity of the constructed wetland using pumping systems and sprinklers.
• Watering trees along the road and around the campus requires a small amount of water due to the rainy conditions in the south of Thailand.
• Fish farming with treated water with quality control certification.
• Washing university-owned cars
• Cleaning roads on the campus
• Cooling water for the incinerators