Accelerated biological-chemical wastewater treatment
Abstract
Abstract IN A WASTEWATER TREATMENT PLANT EMPLOYING AN AEROBIC BIOLOGICAL PROCESS AS A FIRST STAGE, FOLLOWED BY A CHEMICAL-FLOCCULATION STAGE, SOLIDS OBTAINED IN THE LATTER STAGE ARE CONTINUOUSLY RECYCLED TO THE AEROBIC REACTOR OF THE FIRST STAGE IN AMOUNTS SUFFICIENT TO MAINTAIN THE CONTENT OF INORGANIC SUSPENDED MATERIAL THEREIN AT A LEVEL BETWEEN 30 AND 60 PERCENT BASED ON THE WEIGHT OF TOTAL SUSPENDED SOLIDS PRESENT IN SAID REACTOR. THE PRESENCE OF THE CHEMICAL SOLIDS PERMITS THE BIOLOGICAL STAGE TO REMOVE DEGRADABLE CARBON WITH GREAT EFFICIENCY, EVEN AT HIGH APPLIED VOLUMETRIC LOADINGS SUCH AS BETWEEN ABOUT 300 TO 600 POUNDS BOD PER DAY PER 1000 CUBIC FEET OF AERATION TANK CAPACITY, AND AT HIGH CONCENTRATIONS OF ACTIVE BIOLOGICAL SOLIDS RANGING FROM 3000 TO 6000 MG./L., OR MORE. EXCELLENT REMOVAL OF PHOSPHATES IS ACHIEVED IN THE CHEMICAL-FLOCCULATION STAGE. A HIGH DEGREE OF REMOVAL OF ORGNIC NITROGEN IS ALSO OBTAINED. D R A W I N G
Inventors
- 👤 W Kaufman
Bibliographic Details
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