Bio filter is a man-made bio-reactor, drain off management using microbe activity to prevent water pollution in oceans, rivers, lakes, and marshes. In appearance, Bio-filter is a simple cord covered with countless rings of thread, made of polymers such as polypropylene, vinylon, polyvinylidene-chloride, binylon or nylon-polyester . Its unique properties thus provide a symbiotic culture bed for a wide spectrum of microbes.
How it works :
When Bio-filter is manufactured, it leaves the factory with a slightly positive charge. Placed in water, it attracts microbes, which by nature have a slightly negative charge. The structure of the Bio filter also attracts the microbes. Because of this, Bio-filter is the choice media for microorganisms to live and grow on. The microbes adhere to the threads and perform biodegradation. This is done in a three-step process including an anaerobic step for optimum solids removal (instantaneous breakdown).
Features and Benefits :
Does not require frequent cleaning due to the cords' ability to cast off accumulated solids via gravity while maintaining activity; resulting in water treatment that is more stable.
A properly designed system is 100% environmentally friendly.
The Bio-filter system can be included in the design of new or retrofitted to existing recirculation systems; this flexibility allows for site specific applications.
Increased amount of surface areas holds a large quantity of microorganisms per unit length compared to other bio-filter media; therefore less area is taken up by the bio-filter.
Inexpensive to operate and maintain. A four million gallon unit requires only a total of 30-hp and 2 hours per day of attention to ensure operational parameters. Due to the high solids removal, settling ponds lagoons do not have to be cleaned out as often.
97% nitrogen and 98% solids removal with right chemistry.
By reducing the solids, you reduce the BOD (biological oxygen demand) therefore less oxygen is required, also lowers phosphorus and nitrogen levels.
Other advantages include: reduced odor and make up flow is decreased.
In fish applications it provides food for microbiological feeders as well as a substrate for eggs sacs (when deployed directly in the water column)
Effective in high sludge applications, up to 10% TSS (total suspended solids) such as fish farm settling ponds, hog lagoons.
Bio-filter is lightweight and void fraction is large therefore installation and maintenance is easy.
Typical Bio-filter Usage:
Public filtering plants - Office buildings, schools, homes, towns, etc.
