Sewage treatment apparatus

An apparatus for treating sewage comprising:

• a wet well for containing a defined volume of sewage and being located to receive raw sewage;
• a wet well pump for removing sewage from said wet well;
• first means for detecting a first predetermined level of sewage in said wet well and generating a first output signal upon detecting said first predetermined level, wherein said first predetermined level is a level at which said wet well contains said defined volume of sewage;
• second means for detecting a second predetermined level of sewage in said wet well and generating a second output signal upon detecting said second predetermined level, wherein said second predetermined level is a level at which said wet well is substantially empty;
• first control means, responsive to said first output signal and said second output signal, for activating and deactivating said wet well pump, wherein said first control means activates said wet well pump to pump sewage out of said wet well upon receipt of said first output signal and deactivates said wet well pump upon receipt of said second output signal;
• second control means, located so as to receive said second output signal produced by said second means for detecting and indicative of said wet well being substantially empty, for generating a third output signal in response to said second output signal;
• and
• means, responsive to said third output signal, for dispensing a predetermined amount of sewage treatment chemical into a substantially empty wet well to substantially inhibit an undesirable chemical in the sewage, wherein said sewage treatment chemical, after being dispensed into said substantially empty wet well, mixes with sewage upon the entry of sewage into said wet well, and said sewage treatment chemical substantially immediately begins reacting with sewage entering said wet well to inhibit said undesirable chemical in the sewage, and said predetermined amount of sewage treatment chemical is sufficient to inhibit said undesirable chemical in said defined volume of sewage and thereby make efficient use of said sewage treatment chemical.