1- Put the bucket upside down in the big container that filled with water and push it through water to the base of the container in order to push the air out of the bucket. Notice that high pressure air come from the hoses which id caused by water. Make sure that the bucket is rounded by water and there is no more air in it.
2- Put a tap in the end of the long hose that transfer biogas from reservoir to the boiler in order to control the exit of gas
3- Putting the digester on a stand or something to be higher than the reservoir is recommended.
4- Put trash in the digester using a cone.