Open lagoon system

Only Aspergillus niger is strongly amylolytic and capable of using foe starch in the effluent. Open lagoon systems operating at low pH, if effective, would be a cheaper method of production than aseptic bioreactors. 

The system I shall simulate is an evaporating lagoon connected to the open ocean. The quantities to be calculated, listed in order in subroutine... 

At an eastern refinery, an aerated lagoon provides the primary treatment for the refinery wastes. The lagoon effluent typically contains 20 to 40 ppm oil, 20 to 40 ppm suspended solids, and associated BOD. The system flow is 1,400 gal/min. The effluent from the aerated lagoon is treated with 10 to 30 ppm of aluminum sulfate that is mixed in a hydraulic flash mix chamber and then applied to an open concrete mixed-media filter. The single mixed-media filter is rated at 5 gal/min/sq ft. Typical removal efficiencies reported are as follows. 

The sludge evaporation lagoon (Fig. 1) may be described as an open holding facility which depends solely on eliminating conditions such as evaporation, precipitation, temperature, humidity, and wind velocity to effect dissipation (evaporation) of on-site wastewater. Individual lagoons may be considered an alternate means of wastewater disposal on individual pieces of property. The basic impetus to consider this system is to allow building and other land uses on properties, which have soil conditions not conducive to the workability and acceptabiUty of the traditional on-site drainfield or leachhed disposal systems (1-3). 

---