Waste-water treatment system

• US 4,100,073 A
• Filed: 07/06/1976
• Issued: 07/11/1978
• Est. Priority Date: 07/06/1976
• Status: Expired due to Term

• Current Assignee: Francis J. Hopcroft
• Original Assignee: Francis J. Hopcroft
• Inventors: Hopcroft, Francis J.
• Primary Examiner(s): Hart, Charles N.
• Assistant Examiner(s): Castel, Benoit
• Application Number:
  US05/702,959
• Time in Patent Office: 735 Days
• Field of Search: 210/17, 210/15, 210/62, 210/150, 210/151, 210/16, 210/170, 210/532 S, 210/18, 210/152, 210/290, 137/139
• US Class Current: 210/532.1
• CPC Class Codes: C02F 3/288 comprising septic tanks combined with a filter
• CPC Class Codes: C02F 3/30 Aerobic and anaerobic processes

Abstract

A wastewater treatment system is provided for use in treating the sanitary and grey waste waters from individual homes in areas where subsurface disposal of these wastes is not feasible and where discharge of treated effluent to a body of surface water is permitted. All toilet wastes, bath and shower wastes, and kitchen wastewater can be treated by this process and system. These wastes are cleansed, disinfected and clarified prior to discharge to the receiving body of water. The system includes a septic tank, a dosing chamber, an enclosed sand filter, and a disinfection unit operatively connected to one another for progressive cleansing, clarification and disinfection of the wastewater.

Claims

1. A wastewater treatment system including,

(a) an anaerobic septic tank having an inlet adapted to receive raw wastewater including solid and liquid waste components and a first outlet conduit at the upper portion of said septic tank for discharging effluents therefrom, said septic tank providing primary anaerobic treatment of said wastewater,

(b) a dosing chamber connected to said first outlet conduit of said septic tank whereby the effluent discharge of said septic tank is delivered to said dosing chamber for temporary storage therein, said dosing chamber including automatic dosing means for discharging a predetermined volume of liquid collected in said dosing chamber, and a second outlet conduit connected to said dosing means for discharging liquids therefrom,

(c) a gravity filter connected to said second outlet conduit for removing solid particles suspended in the liquid discharged from the dosing chamber and for enhancing aerobic decomposition of said solid particles,

(d) said filter including an enclosure and a filter bed disposed within said enclosure, said enclosure including top, bottom and side walls and connected at the top thereof to said second outlet conduit, a third outlet conduit connected to the bottom of said enclosure, said filter bed including an upper stratum of peastone, a middle stratum of sand, and a bottom stratum of peastone, the top surface of said upper stratum being spaced from said top wall to define a void therebetween coextensive with the top of the filter and said top wall, at least a pair of spaced atmospheric vents connected to the upper portion of said enclosure, communicating with said void, and adapted to automatically and continuously circulate fresh air across the top surface of said filter, and distribution means connected to said second outlet conduit and adapted to distribute the liquid discharged from said dosing chamber over the top of said filter bed, and collection means at the bottom of said filter connected to said third outlet conduit for collecting filtered effluent, and,

(e) disinfection means connected to said third outlet conduit for disinfecting filtered liquid.

2. A wastewater treatment system, according to claim 1, wherein said distribution means includes a perforated distributor pipe within said filter connected to said second outlet conduit and having a plurality of portions disposed over the top of said upper stratum for distributing the liquid discharged from said dosing chamber over different portions of said upper stratum, said collection means including a collector pipe at the bottom of said bottom stratum connected to said third outlet conduit for collecting the filtered liquid.