PT.INDOKARYA TIRTA ABADI
PT.Indokarya Tirta Abadi equipped laboratory provides continuous analytical support for project enabling selection
of the optimal filtration process design.Laboratory Facilities include :
Water quality analyse
refers to the chemical, physical, biological, and characteristics of water.
It is a measure of the condition of water relative to the requirements of one or more biotic species and or to any human need.
Reference to a set of standards against which compliance can be assessed.
Common standards used to assess water quality relate to health of ecosystem, safety of human contact and drinking water.
Silt Density Index (SDI)
is a measure for the fouling capacity of water in reverse osmosis systems.
The test measures the rate at which a 0.45-micrometre filter is plugged when subjected to a constant water pressure of 206.8 kPa (30 psi).
The SDI gives the percent drop per minute in the flow rate of the water through the filter, averaged over a period of time such as 15 minutes.
Spiral wound reverse osmosis systems will need an SDI less than 5, and hollow fiber reverse osmosis systems will need an SDI less than 3.
In these kinds of systems, deep well waters (with a typical SDI of 3) could be used straight from the source.
If fed from surface waters (with a typical SDI greater than 6), the water will need to be filtered before use.
Fouling of reverse osmosis and nanofiltration membranes.
This investigation attempts to identify the most influential membrane properties governing colloidal fouling rate of RO/NF membranes.
Four aromatic polyamide thin-film composite membranes were characterized for physical surface morphology, surface chemical properties,
surface zeta potential, and specific surface chemical structure. Membrane fouling data obtained in a laboratory-scale crossflow filtration unit
were correlated to the measured membrane surface properties.
Results show that colloidal fouling of RO and NF membranes is nearly perfectly correlated with membrane surface roughness,
regardless of physical and chemical operating conditions.
Biochemical oxygen demand (BOD)
is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given
water sample at certain temperature over a specific time period.
BOD used as a gauge of the effectiveness of wastewater treatment plants.
chemical oxygen demand (COD)
applications of COD determine the amount of organic pollutants found in surface water (e.g. lakes and rivers) or wastewater,
making COD a useful measure of water quality.
It is expressed in milligrams per liter (mg/L) also referred to as ppm (parts per million), which indicates the mass of oxygen consumed
perliter of solution.
Biofilm characterization and activity analysis in water and wastewater treatment
Analytical methods are classified in three main categories:
- Biofilm formation and structure.
- Biofilm composition described in terms of total biofilm amount, specific biofilm components and cellular components.
- Biomass activity descriptors.
Analysis focused on the potential of these methods for accurate biofilm characterization and biomass activity estimation in fundamental research
and for the practical needs of wastewater treatment operation and control.
Particle size analysis in primary and secondary waste water effluents.
Primary and secondary effluents of three waste water treatment works were analyzed for the size distribution of particle mass,
chemical oxygen demand (COD), and phosphorus.
Fractionation of suspended solids was done by 0.1–8.0µm polycarbonate filters and 32–125µm sieves, respectively.
Primary as well as secondary effluents exhibited characteristic differences in the size distribution curves.
Particle size distributions in terms of particle mass could be represented by a power law function.
Automatic measurement of particle size distribution by a laser scanning device was evaluated .