Phosphorus removal can be particularly difficult, especially as local and state statutes become more stringent about its control. H2O Tech has extensive experience in managing, cleaning, and even recycling phosphorus through a variety of means, as described below. In particular, relying only on chemical treatment of phosphorus can lead to secondary problems, including increasing the volume of sludge produced which also has poor settling and dewatering characteristics.
H2O Tech, on the other hand, can create biological agents that can reduce sludge volume, improve its settling and dewatering potential, and reduce oxygen requirements. Our phosphorus removal processes include the following:
1. Precipitation
- Pre-Precipitation - Chemical addition to raw wastewater and precipitate is removed with primary sludge.sdfds
- Simultaneous Precipitation - Chemical addition so that the precipitation is removed with the waste biological sludge. Can be added either to primary effluent or to mixed liquor, prior to secondary sedimentation.
- Post-Precipitation - Chemical addition after both primary and secondary treatment processes, where an additional solid separation device is needed (DAF, clarifier or filter).
2. Biological Removal
- Also called Bio-Assimilation. Accomplished by stressing bacteria into consuming the Phosphorus. Average of 10 to 30% Phosphorus removal is dependent on BOD, Soluble Phosphorus, Dissolved Oxygen and Volatile Suspended Solids concentrations.
3. Chemical Removal
- Using Aluminum
Aluminum, Aluminum Sulfate or Sodium Aluminate
- Using Iron (Ferrous and Ferric)
Ferrous Sulfate, Ferrous Bicarbonate or Ferrous Chloride
Ferric Sulfate or Ferric Chloride
- Using Calcium Lime or Calcium Hydroxide
- Using H2O Tech Specialty Blends
H2O Tech has developed several specialty products on a site specific basis.
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Technical Glossary |
