PVA Hydro-Gel is a Moveing Bed Media. PVA Gel is composed primarily of polyvinyl alcohol, PVA gel has a porous,
reticulate structure that can trap and carry microorganisms. PVA gel is used for removal of common organic compounds.
In addition, PVA gel technology can be effectively used for removal of Nitrogen and Phosphorus from the wastewater. It
has very high water content due to its extensive porosity, thus allowing for favorable permeability of oxygen and nutrients
to the bacteria colonized inside the beads. It has a network of minute pores about 20 microns in diameter. PVA gel media
is excellent for sludge reduction due to lesser amount of biomass yield and higher endogenous decay rate of that sludge.
PVA gel can also be used for nitrification and de-nitrification as well as treatment of various industrial pollutants. It
consists of beads, each bead have a diameter of 4mm can hold up to 1 billion microorganisms. PVA gel is insoluble in
water and is non-biodegradable. It has excellent fluidity in water and requires minimal energy for mixing. Each bead can
hold up microorganisms up to 1 billion [7]
.
The main objective of this research was 1. To study the treatability of dairy industry wastewater using PVA Gel. 2. To
reduce COD level. 3. To reduce BOD level. 4. To treat wastewater in less time (to reduce retention time).