The problems concerning the environment increases really fast and rapidly,
growing into a global issue and attracting attention from all the world. One of the
main problem of the environment that is faced by Indonesia is deforestation caused
by palm oil farming. Palm oil came from South Africa as the main source of oil plant
that produces the most resources of oil compare to other types of tree. The present of
palm oil farming brought a lot of advantages such as increasing in income for the
state from taxes, retribution etc. Palm oil farming has been spread out all over West
Borneo, one of them is located in the City of Ketapang. The issue is how to manage
the liquid waste from palm oil plantation to avoid polluting the River Pawan in the
City of Ketapang and the problem that is faced by PT. Agro Lestari Mandiri. The
main purpose of this research is to find out the proses of processing the liquid waste
caused by the palm oil plantation/farming so that it could be controlled and prevent
more polution into the water of the river in the City of Ketapang. This type of
research is an empirical type that uses a primary data as the main data, which is the
data that was obtained directly from respondents and the secondary data used as a
support. The result of this reaserch is that PT. Agro Lestari Mandiri has been
processing the liquid waste the right way and legally concerning the laws and
regulation.