Abstract :
Tofu is a kind of food which is liked by many people. Tofu in a concerning plants food
which is made through two steps, they are the production and coagulating of soybean
milk. The main raw material in the production of tofu are water and soybean, so it is
interesting to find out the efficiency of raw material in the tofu production. The efficient in
this research means to use the best treatment and profitable, which is related with raw
material in the tofu production. The goal of this experiment is to know concentrate that
more efficient from using local soybean and import soybean and to know the composition
of assign water efficiently in making tofu. This research was done in two steps. First step
is to find out the most efficient of water composition ( soybean : water = 1:8 and 1:10).
After got the right composition of water, and ten apply it in the process of making tofu for
second step, making tofu with different composition between local soybean and import
soybean. This research used five comparisons between local and import soybean. Pure
import soybean 100%, import : local (25% : 75%), import : local (50% : 50%), import :
local (75% : 25%), and pure local soybean 100%. This research also tested the waste
(whey) were determined of the physical and chemical characteristic of tofu water waste
(whey), which are the volume, temperature, Total Solid, Total Suspended Solid, Total
Dissolved Solid, pH, Chemical Oxygen Demand, Biochemical Oxygen Demand, protein.
The most efficient treatment in tofu production was resulted by tofu in the comparison 1:8
(soybean : water). This treatment resulted in smallest volum of waste water and best
combination of soybean was resulted by tofu using 50 % import and 50 % local soybean,
since it has enough total solid and low nutrition loss during production process