Waste water assessment

1. A waste water assessment apparatus, comprising:

a housing;

transceiver circuitry, located in the housing, for periodically transmitting microwave signals through a wall of a closed conduit channeling waste water away from a property and for receiving reflections of the microwave signals, from within the closed conduit, that have passed through the wall of the closed conduit; and

processing circuitry, located in the housing, configured to:

process one or more of the reflections of the microwave signals to determine a distance between the transceiver circuitry and a surface of the waste water flowing in the closed conduit and in order to quantify waste water flow through the closed conduit using the determined distance;

determine that the determined distance has been constant for a period of time;

distinguish between a constant determined distance corresponding with a steady flow of waste water in the closed conduit and a constant determined distance corresponding with a blockage in the closed conduit by determining that there is the blockage in the closed conduit if the period of time is longer than a threshold period of time; and

compare one or more properties of the one or more reflections of the microwave signals, including a phase of the one or more reflections of the microwave signals, with reference data stored in memory circuitry in order to identify, one or more impurities present in the waste water from a number of impurities referenced in the reference data; and

an alerting device, located outside the housing, operably coupled to the processing circuitry and configured to alert a user as to a presence of the blockage in response to the processing circuitry determining that the determined distance between the transceiver circuitry and the surface of the waste water has been constant for the period of time longer than the threshold period of time.

2. The waste water assessment apparatus as claimed in claim 1 , wherein the processing circuitry is configured to determine an amount of waste water flowing through the closed conduit at a particular time by processing at least one property of a first reflection of a transmitted microwave signal.

3. The waste water assessment apparatus as claimed in claim 2 , wherein the at least one property includes a first amplitude of the first reflection of the transmitted microwave signal relative to a second amplitude of the transmitted microwave signal.

4. The waste water assessment apparatus as claimed in claim 2 , wherein the at least one property includes a time elapsed between the transmission of the microwave signal and a reception of the first reflection of the transmitted microwave signal.

5. The waste water assessment apparatus as claimed in claim 1 , wherein the processing circuitry is configured to determine an amount of waste water that has flowed through the closed conduit over a period of time by processing at least one property of a first reflection of a transmitted microwave signal.

6. The waste water assessment apparatus as claimed in claim 1 , wherein the one or more impurities comprise one or more hydrocarbons.

7. The waste water assessment apparatus as claimed in claim 1 , wherein the processing circuitry is configured to process one or more reflections of the microwave signals to determine a quantity of a particular impurity present in the waste water.

8. The waste water assessment apparatus as claimed in claim 1 , wherein the transmitted microwave signals are ultra wide band microwave signals.

9. The waste water assessment apparatus as claimed in claim 1 , further comprising a waveguide configured to guide transmitted microwave signals through the wall of the closed conduit.

10. The waste water assessment apparatus as claimed in claim 1 , wherein the height of the waste water in the closed conduit is determined using the determined distance between the transceiver circuitry and the surface of the waste water.

11. The waste water assessment apparatus as claimed in claim 1 , wherein the memory circuitry is located within the housing.

12. The waste water assessment apparatus as claimed in claim 1 , wherein the reference data comprises a look-up table.

13. The waste water assessment apparatus as claimed in claim 1 , wherein the one or more impurities comprise one or more metals.

14. The waste water apparatus as claimed in claim 1 , wherein the alerting device is at least one of a light emitting diode or an audible alarm.

15. A method, comprising:

periodically transmitting microwave signals, using transceiver circuitry located in a housing, through a wall of a closed conduit channeling waste water away from property;

receiving, at the transceiver circuitry, reflections of the microwave signals, from within the closed conduit, that have passed through the wall of the closed conduit;

processing, using processing circuitry located in the housing, one or more of the reflections of the microwave signals to determine a distance between the transceiver circuitry and a surface of the waste water flowing in the closed conduit;

quantifying, using the processing circuitry, waste water flow through the closed conduit using the determined distance;

determining, using the processing circuitry, that the determined distance has been constant for a period of time;

distinguishing, using the processing circuitry, between a constant determined distance corresponding with a steady flow of waste water in the closed conduit and a constant determined distance corresponding with a blockage in the closed conduit by determining that there is the blockage in the closed conduit if the period of time is longer than a threshold period of time;

comparing, using the processing circuitry, one or more properties of the one or more reflections of the microwave signals, including a phase of the one or more reflections of the microwave signals, with reference data stored in memory circuitry in order to identify one or more impurities present in the waste water from a number of impurities referenced in the reference data

alerting, using an alerting device located outside the housing and operably coupled to the processing circuitry, a user as to a presence of the blockage in response to the processing circuitry determining that the determined distance between the transceiver circuitry and the surface of the waste water has been constant for the period of time longer than the threshold period of time.

16. The method as claimed in claim 15 , further comprising: fitting the transceiver circuitry, for periodically transmitting the microwave signals, to a position adjacent to the closed conduit and outside the closed conduit.

17. A non-transitory computer-readable medium storing a computer program comprising computer program instructions that, when executed by processing circuitry, cause the method as claimed in claim 15 to be performed.