biological filter, trickling filter
biological filter loading
contact biological filter
Experiment and research of wastewater treatment in city by anaerobic biological filter in series
The superiorities of the biological filter and activated sludge were synthesized to increase the treatment efficiency.
A down-flow biological filter is used for the groundwater iron and manganese.
While not strictly necessary, your pond can benefit from having a pump and biological filter to keep water cleaner.
Down stream anaerobic biological filter where waste-water poured from top was used as anaerobic processing device in which bacteria colloid was found on padding in biological membrane form.
