SI Precast Concrete has partnered
with several manufacturers of aerobic treatment
units to answer the ever-growing demand of
regulatory agencies requiring pretreatment of
effluent prior to discharging to any type of
disposal system and offers a full line of aerobic
treatment units from Delta Environmental Products and Norweco, all
leaders in the field of aerobic treatment products.
SI Precast Concrete provides residential treatment
units that are certified NSF/ANSI Standard 40 Class
SI Precast also offers two different processes for
the treatment of effluent. One process is the
extended aeration mode of activated sludge. This
process is often referred to as suspended growth
The other process is referred to as attached growth
or fixed film. In this process, conditions are
favorable only to attached growth bacteria therefore
no mixed liquor suspended solids, which are common
in an activated sludge process, are produced.
These products are driven by individual market
demand. SI Precast Concrete has made it our priority
to provide the appropriate product in any of the
markets in which we do business.
Resource Center for shop drawings of products and a
available on all products.