Organic waste treatment

1. Bio-Fertirizer

At present, the amount of waste products from gardening of various organizations inside Salaya campus is increasing rapidly. Therefore, the Division of Physical and Environment studied the production of bio-fertilizer in order to increase the decomposition rate. The aim is to obtain bio-fertilizer without flipping over the contents to increase aeration as well as increase the efficiency, reduce cost, and apply appropriate technology. The study of bio-fertilizer, thus, was a way for the farmers to produce bio-fertilizer in approximately one month.

Conventional practice requires occasional flipping the contents over to increase aeration and decompose by aerobic microbes. Bio-fertilizer can be obtained from 2-6 months. The landscape and environmental group then set up a bio-fertilizer project. The goal was to decompose the leaves and branches. The bio-fertilizer can be used inside the Salaya campus, while the excess can be distributed. The benefit of the bio-fertilizer can be used in orchard, plantation, household use, grass field, and etc. The biofertilizer is available at the Environmental Conservation Building. For more information,

please contact 0-2849-6000 ext 1210-1211 in the official hours.


Energy of Community for Community Award 2013 for the Compost Pile Aeration Project

Asst.Prof. Dr. Wanida Koo-amornpattana, Assistant to President for Facility and Environment represented of Mahidol University to receive a certificate "Creativity" in the project of "The Compost Pile Aeration Project" arranged by Senate Committee on Energy, Ministry of Energy corporate with National Research Council, EPA, the Electricity Generating Authority of Thailand and Kasetsart University at Parliament, Bangkok, Thailand, 23 August 2013.




The Landscape and Environmental Unit, Physical and Environmental Division collaborated with the Electricity Generating Authority of Thailand (EGAT), which is an organization with expertise in the production of E.M. (Effective Microorganism). EGAT supports the equipments in the production of E.M. for Salaya campus, and also conducted informative workshops for staff and personnel, who are responsible for the cleaning and gardening of the campus. The E.M. is effective as animal feed (poetry, swine, cattle, and aquatic animals), and it helps digestion, increase disease resistance, remove foul smell in the animal husbandry, and reduce the pest and insects problems. The use of E.M. is a natural approach that assists the decomposition of organic matters in the soil from liquid to dirt. It helps solving the environmental problems in household, canal, pond, puddle, and garbage dump site. E.M. is effective in cleaning the floor of the lavatory and floor cleaning, particularly in the fresh market and cafeteria. The personnel, staff, students, and restaurant staff may obtain the E.M. from the Environmental Conservation Building during official hours free of charge.

Fertilizer production process (.pdf File)

Price of fertilizer (.pdf File)

2. Biogas
Biogas production from organic waste


Nowadays, Mahidol University produces high volume of organic wastes from numerous activities. Two main sources of the waste are 1) garbage from the central canteen and 2) horse excretion from Faculty of veterinarian, which contains the quantity of 15 ton per month and 1.5 ton per month, respectively. These organic wastes can be utilized for producing biogas by fermenting in the anaerobic condition. The waste elimination by this method can generate several products majorly methane (CH4) and carbon dioxide (CO2). The biogas can be used for compensating the consumption of other fuels; for example, 1 m3 of biogas equals to 1) 0.46 kg of LPG, 2) 0.06 L of diesel, 3) 0.55 L of furnace oil, or 4) 1.20 kW/h (unit) of electricity.


1.) Minimize organic waste in Mahidol Univrsity

2.) Recycling organic waste.

Biogas production set:

1.) Food digester.

2.) Food feeding tank

3.) Fermentation tank/Biofertilizer

4.) Gas storage tank

5.) Stov


3. Cold room for organic


4. scrape your dishes before returning them