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US 2025/0019284 A1Published application
System and method of supplements dosing to remove total nitrogen from sewage
OwnerGregory D. GRAVESinventor
Life of this patent
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Abstract
A system and method of supplements dosing to remove total nitrogen (TN) from domestic wastewater that can be implemented in a multi-chamber system with a pretreatment chamber fluidly connected to either an anoxic chamber or an aeration chamber, and if connected to the anoxic chamber, the anoxic chamber is fluidly connected to the aeration chamber or tank, and the aeration chamber is fluidly connected to a settling chamber or tank. The system can be used with several methods of organic and alkaline material supplements dosing to remove suspended solids, BOD, ammonia (NH4), nitrate and TN from wastewater.
Claims61
A wastewater treatment method for removing total nitrogen from an influent residential wastewater comprising:
- receiving an influent flow of a residential wastewater in a pretreatment chamber of a wastewater treatment apparatus;
- pretreating the residential wastewater in the pretreatment chamber to produce a pretreated wastewater;
- receiving the pretreated wastewater from the pretreatment chamber in an anoxic chamber;
- measuring pH and dissolved oxygen levels in the pretreated wastewater in the anoxic chamber and in wastewater in an aeration chamber;
- receiving a first amount of an organic carbon material in the anoxic chamber to maintain a predefined ratio between the organic carbon level, total nitrogen level and BOD level of the pretreated wastewater in the anoxic chamber;
- receiving a first amount of an alkaline material in the anoxic chamber to maintain a predefined pH and a predefined ratio between the alkalinity and a total nitrogen level of the residential wastewater in the anoxic chamber;
- performing a nitrification process and a denitrification process on the pretreated wastewater in the anoxic chamber to convert ammonium to nitrogen gas to form an anoxically treated wastewater;
- pumping sludge into the pretreatment chamber and mixing the sludge with the pretreated treated wastewater in the pretreatment chamber;
- receiving the anoxically treated wastewater from the anoxic chamber in an aeration chamber;
- measuring pH and dissolved oxygen levels in the anoxically treated wastewater in the aeration chamber;
- receiving at least one of a second amount of the organic material to maintain a predefined ratio between the organic carbon level, total nitrogen level and BOD level of the pretreated wastewater in the aeration chamber and a second amount of the alkaline material in the aeration chamber to maintain a predefined pH and a predefined ratio between the alkalinity and the total nitrogen level of the anoxically treated wastewater in the aeration chamber;
- aerating the anoxically treated wastewater in the aeration chamber to remove the nitrogen gas in the anoxically treated wastewater to produce treated water;
- receiving the treated water in a settling chamber;
- and
- discharging the treated water from the settling chamber.
12 more elements
A wastewater treatment method for removing total nitrogen from an influent residential wastewater comprising:
- receiving and pretreating an influent flow of a residential wastewater in a pretreatment chamber of a wastewater treatment apparatus to produce a pretreated wastewater;
- receiving the pretreated wastewater from the pretreatment chamber in an anoxic chamber;
- maintaining a minimum temperature of the pretreated wastewater in the anoxic chamber;
- measuring pH and dissolved oxygen levels in the pretreated wastewater in the anoxic chamber and an aeration chamber;
- receiving an organic carbon material in the anoxic chamber adjacent to the inlet of the anoxic chamber from a first dispenser based on the measured pH of the anoxic chamber to maintain a predefined ratio between the organic carbon level and the total nitrogen level of the pretreated wastewater in the anoxic chamber;
- receiving a first amount of an alkaline material in the anoxic chamber adjacent to an outlet of the anoxic chamber from a second dispenser based on the measured pH of the anoxic chamber to maintain a predefined pH and a predefined ratio between the pH and a total nitrogen level of the pretreated wastewater in the anoxic chamber;
- performing a nitrification process and a denitrification process on the pretreated wastewater in the anoxic chamber to convert ammonium to nitrogen gas by adding at least one bacteria to the anoxic chamber to create anoxically treated wastewater;
- receiving the anoxically treated wastewater from the anoxic chamber in the aeration chamber;
- measuring pH and dissolved oxygen levels in the anoxically treated wastewater in an aeration chamber;
- receiving at least one of a second amount of the organic material to maintain the predefined ratio between the organic carbon level, total nitrogen level and BOD level of the pretreated wastewater in the aeration chamber and a second amount of the alkaline material in the aeration chamber from a third dispenser, based on the measured pH of the aeration chamber to maintain the predefined pH and a predefined ratio between the pH and the total nitrogen level of the anoxically treated wastewater in the aeration chamber;
- aerating the anoxically treated wastewater in the aeration chamber to remove the nitrogen gas in the residential wastewater to produce treated wastewater;
- receiving the treated wastewater in a settling chamber;
- returning sludge from the settling chamber to the anoxic chamber;
- and
- discharging the treated wastewater from the settling chamber.
12 more elements
A wastewater treatment system for removing total nitrogen from an influent residential wastewater comprising:
- means for receiving a volume of wastewater;
- means for pretreating the volume of wastewater to produce pretreated wastewater;
- means for receiving the pretreated wastewater from the pretreating means;
- means for anoxically treating the pretreated wastewater to produce anoxically treated wastewater;
- means for delivering an amount of an organic material and a first amount of an alkaline material in the anoxically treating means;
- means for maintaining a minimum temperature of the pretreated wastewater in the anoxically treating means;
- means for receiving the anoxically treated wastewater from the anoxically treating means;
- means for aerating the anoxically treated wastewater to produce aerated wastewater;
- means for measuring pH and dissolved oxygen levels of the pretreated wastewater in the anoxically treating means and in the anoxically treated wastewater in the aerating means;
- means for delivering at least one of a second amount of the organic material and second amount of the alkaline material in the aerating means;
- means for receiving aerated wastewater from the aerating means;
- means for settling the aerated wastewater to produce settled wastewater;
- and for internally pumping sedimentation and settled wastewater from the settling means back to the anoxically treating means;
- means for mixing the pumped sedimentation and settled wastewater with the pretreated wastewater in the anoxically treating means;
- means for treating the settled wastewater to produce treated water;
- and
- means for discharging the treated wastewater as an effluent wastewater from the settling means.
14 more elements
A wastewater treatment method for removing total nitrogen from an influent residential wastewater comprising:
- receiving an influent flow of a residential wastewater in a pretreatment chamber of a wastewater treatment apparatus;
- pretreating the residential wastewater in the pretreatment chamber to produce a pretreated wastewater;
- receiving the pretreated wastewater from the pretreatment chamber in an aeration chamber;
- measuring pH and dissolved oxygen levels in the pretreated wastewater in the aeration chamber and the pretreatment chamber;
- receiving a first amount of an organic carbon material in the aeration chamber to maintain a predefined ratio between the organic carbon level, total nitrogen level and BOD level of the pretreated wastewater in the aeration chamber;
- receiving a first amount of an alkaline material in the aeration chamber to maintain a predefined pH and a predefined ratio between the alkalinity and a total nitrogen level of the residential wastewater in the aeration chamber;
- performing a nitrification process and a denitrification process on the pretreated wastewater in the aeration chamber to convert ammonium to nitrogen gas to form an aeration treated wastewater;
- pumping sludge into the aeration chamber and mixing the sludge with the aeration treated wastewater;
- measuring pH and dissolved oxygen levels in the aeration treated wastewater in the aeration chamber;
- if needed, receiving a second amount of an organic carbon material in the aeration chamber to maintain a predefined ratio between the organic carbon level, total nitrogen level and BOD level of the pretreated wastewater in the aeration chamber;
- if needed, receiving a second amount of the alkaline material in the aeration chamber to maintain a predefined pH and a predefined ratio between the alkalinity and the total nitrogen level of the aerated treated wastewater in the aeration chamber;
- aerating the aeration treated wastewater in the aeration chamber to remove the nitrogen gas in the aeration treated wastewater to produce treated water;
- receiving the treated water in a settling chamber;
- and
- discharging the treated water from the settling chamber.
12 more elements
A wastewater treatment method for removing total nitrogen from an influent residential wastewater comprising:
- receiving an influent flow of a residential wastewater in a pretreatment chamber of a wastewater treatment apparatus;
- pretreating the residential wastewater in the pretreatment chamber to produce a pretreated wastewater;
- receiving the pretreated wastewater from the pretreatment chamber in an aeration chamber;
- measuring pH and dissolved oxygen levels in the pretreated wastewater in at least one of the aeration chamber and the pretreatment chamber;
- determining whether to add supplements to the pretreatment chamber;
- if it is determined to add supplements to the pretreatment chamber, receiving at least one of an amount of an organic carbon material and an alkaline material in the pretreatment chamber based on the measured at least one of pH and dissolved oxygen levels of the aeration chamber and in the pretreatment chamber;
- determining whether to maintain a minimum temperature;
- if it is determined to maintain a minimum temperature, maintaining the minimum temperature in the aeration chamber and in the pretreatment chamber;
- receiving a first amount of an organic carbon material in the aeration chamber to maintain a predefined ratio between the organic carbon level, total nitrogen level and BOD level of the pretreated wastewater in the aeration chamber;
- receiving a first amount of an alkaline material in the aeration chamber to maintain a predefined pH and a predefined ratio between the alkalinity and a total nitrogen level of the residential wastewater in the aeration chamber;
- performing a nitrification process and a denitrification process on the pretreated wastewater in the aeration chamber to convert ammonium to nitrogen gas to form an aeration treated wastewater;
- pumping sludge into the pretreatment chamber and mixing the sludge with the pretreated treated wastewater in the pretreatment chamber;
- determining whether conditions suggest adding bacteria;
- if conditions suggest adding bacteria, adding an amount of bacteria to the aeration chamber based on the determined conditions;
- measuring pH and dissolved oxygen levels in the aeration treated wastewater in the aeration chamber;
- if additional organic carbon material is determined to be needed, receiving a second amount of the organic carbon material in the aeration chamber to maintain a predefined ratio between the organic carbon level, total nitrogen level and BOD level of the pretreated wastewater in the aeration chamber;
- if additional alkaline material is determined to be needed, receiving a second amount of the alkaline material in the aeration chamber to maintain a predefined pH and a predefined ratio between the alkalinity and the total nitrogen level of the aerated treated wastewater in the aeration chamber;
- aerating the aeration treated wastewater in the aeration chamber to remove the nitrogen gas in the aeration treated wastewater to produce treated water;
- receiving the treated water in a settling chamber;
- determining whether the treated water in the settling chamber needs additional treatment;
- if additional treatment of the treated water in the settling chamber is determined to be needed, further treating the treated water in the settling chamber;
- and
- discharging the treated water from the settling chamber.
20 more elements
A wastewater treatment system for removing total nitrogen from an influent residential wastewater comprising:
- means for receiving a volume of wastewater;
- means for pretreating the volume of wastewater to produce pretreated wastewater;
- means for receiving the pretreated wastewater from the pretreating means;
- means for aeration treating the pretreated wastewater to produce aeration treated wastewater;
- means for measuring pH and dissolved oxygen levels of the pretreated wastewater in at least one of the aeration treating means and the pretreating means;
- means for optionally delivering at least one of an amount of the organic material and an amount of the alkaline material in the pretreating means;
- means for delivering at least one of an amount of an organic material and an amount of an alkaline material in the aeration treating means;
- means for maintaining a minimum temperature of the aeration treated wastewater in the aeration treating means;
- means for delivering at least one of an amount of the organic material and an amount of the alkaline material in the aeration treating means;
- means for performing a nitrification process and a denitrification process on the pretreated wastewater in the aeration treating means to convert ammonium to nitrogen gas to form an aeration treated wastewater;
- means for pumping sludge into one of the pretreatment means and mixing the sludge with the pretreated wastewater in the pretreatment means, and the aeration treating means and mixing the sludge with the aeration treated wastewater in the aeration treating means;
- means for receiving aeration treated wastewater from the aeration treating means;
- means for settling the aeration treated wastewater to produce settled wastewater;
- means for internally pumping sedimentation and settled wastewater from the settling means back to the aeration treating means;
- means for mixing the pumped sedimentation and settled wastewater with the pretreated wastewater in the aeration treating means;
- means for treating the settled wastewater to produce treated water;
- and
- means for discharging the treated wastewater as an effluent wastewater from the settling means.
15 more elements
Dependencies are inferred from the claim text.