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Advantages of Tri-Mer's MultiPhase Over
Traditional Bio-filters for VOC Control
- No clogging. Micron-size particles entrained in the gas stream accumulate in all
bio-filters media. Typical bio-filters media clog due to accumulation of fine particles on
the top of the bed. In the MultiPhase system, a proprietary water-permeable,
large-opening, ceramic biomedia is used, and particles are continuously washed
from the bottom of the bed.
- Handles solids. Solids entrained in the inlet gas phase of Tri-Mer bio-filters systems
are removed by sprays in the inlet duct, and water is treated in the digester. Suspended
solids in the digester are removed by the strainer and wet solids can be disposed or
burned in a furnace.
- High temperature. If the inlet gas is high temperature, as in dryer exhaust, management
of heat flow is critical to enabling effective aerobic treatment. In the MultiPhase Bio-filters
systems, heat is continuously monitored and removed using a variety of strategies.
- Treats both phases. Compounds present in the gas and liquid phases are both treated.
Traditional bio-filters used for VOC control only treat compounds in the gas phase;
for water-soluble compounds, such as methanol and formaldehyde, traditional bio-filters
produce contaminated water that must be treated separately.
- Handles condensables. Condensables in the inlet gas phase of the bio-filters system
are condensed in the inlet duct by the sprays and emulsified and treated in the digester.
Emulsification of condensables, such as waxes, is critical to prevent agglomeration and
accumulation of these high molecular weight compounds in the bio-filters media. Emulsification
is achieved by the biosurfactants that are naturally generated by the bacteria.
- Special ceramic media. Clogging due to biomass growth is a major issue for traditional
bio-filters used for VOC control. In this bio-filters design, the biomedia presents a high bed
void fraction, and straight-passage diameter to allow the sloughed-off, excess biomass
growth to be washed down into the digester liquid. Here, it biodegrades, releasing
nutrients back into the digester water.
- Accommodates shutdowns. When not treating contaminated incoming gas, as in the
case of a plant shutdown, there are sufficient organics in the bio-filters digester sump liquid to
keep the bacteria viable, both in the digester and on the biofilter media, due to the continuous
spray from recirculated digester liquid. This is a major advantage over conventional
bio-filters for VOC control, which do not have a continuous supply of living organisms.
Other Advantages of the Tri-Mer Bio-filters Design
- Single-vessel design operates like standard industrial equipment.
- Provides VOC control with high efficiency, up to 98%.
- Handles high particulate loadings.
- Handles heavy VOC compounds.
- Very low wastewater generation, compared to other methods of VOC control.
- Very low system pressure drop and operating costs.
- Minimal waste generation; creates no NOx compounds.
- Smaller footprint, easier placement, shorter duct runs than other VOC control options.
- Provides a wide spectrum of VOC control: formaldehyde, methanol, styrene, xylenes,
PAHs, sulfur compounds, glycols, ethanol, solvents, and many others.
Interested in a cost-saving alternative to traditional bio-filters
for VOC control? Tell us about it . . . we can help you with
some guidelines. Download MultiPhase Bio-filters brochure for VOC control. For more information contact:
Kevin Moss (801) 294-5422
kevin.moss@tri-mer.com PRD Tech, Inc.
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