Soil Colloids in Affecting pH of Various Types and Concentrations of Eco Enzymes

The eco enzyme (EE) is the result of the fermentation of organic waste that reacts with acid pH
< 4. The purpose of the study was to determine the dynamics of changes in the pH of the EE solution
because of the application of soil containing inorganic (clay minerals) and organic (humic) colloids.
Several treatments were made by the concentration of EE solution starting from 0%, 5%, 10%, 20%,
30%, 40%, 50%, and 100%. The pH of the solution was measured at room temperature. The next
treatment is to add soil (mineral and organic) as much as 0, 5, 10, and 15 g into the EE solution according
to the concentration that has been made. The concentration of 5% EE solution significantly lowers the pH
of the water compared to a solution without EE, and the pH continues to decrease as the EE solution
becomes more concentrated (100%). The more soil colloids are added to various types of EE solutions,
the soil pH tends to rise, and the pH containing organic colloids was higher than mineral colloids; this
provided useful information when using EE solutions as liquid organic fertilizers in fields. The advantage
of this study was that it is faster to obtain the results, but it must be tested further in the field. The
application of EE solution as a liquid fertilizer is still safe against a decrease in soil pH and preferably the
soil contains sufficient organic matter