Method of controlling a vacuum waste system and a vacuum waste system

A method of controlling a vacuum waste system, wherein the vacuum waste system comprises a first source of waste and a second source of waste, a vacuum unit configured to generate a vacuum, vacuum sewer piping comprising a main pipe line coupled to the vacuum unit, a first branch pipe coupled to the main pipe line, a second branch pipe coupled to the main pipe line, a first discharge valve coupled between the first source of waste and the first branch pipe, a second discharge valve coupled between the second source of waste and the second branch pipe, wherein a first connection configuration of the first source of waste and the first branch pipe comprises either a downwards connection configuration or an upwards connection configuration, a second connection configuration of the second source of waste and the second branch pipe comprises either a downwards connection or an upwards connection, a first discharge sequence activator is operably coupled to the first discharge valve, and a second discharge sequence activator is operably coupled to the second discharge valve, the method comprising:

• determining a first pre-set discharge time period based, at least in part, according to:
• the first connection configuration between the first discharge valve and the first branch pipe;
• and
• a first distance between the first discharge valve and the vacuum unit;
• determining a second pre-set discharge time period based, at least in part, according to:
• the second connection configuration between the second discharge valve and the second branch pipe;
• and
• a second distance between the second discharge valve and the vacuum unit;
• wherein the second pre-set discharge time period is different than the first pre-set discharge time period;
• generating the vacuum in the vacuum sewer piping by the vacuum unit;
• measuring a first vacuum level at a first point downstream of the first discharge valve;
• measuring a second vacuum level at a second point downstream of the second discharge valve, wherein the second point is different than the first point;
• reducing the first pre-set discharge time period based on the first vacuum level to determine a first modified pre-set discharge time period;
• reducing the second pre-set discharge time period based on the second vacuum level to determine a second modified pre-set discharge time period;
• operating the first discharge sequence activator to actuate the first discharge valve to execute a first discharge valve sequence, in which the first discharge valve is actuated from a closed position to an open position, the first discharge valve remains open for the first modified pre-set discharge time period, and then the first discharge valve is actuated from the open position to the closed position;
• and
• operating the second discharge valve activator to actuate the second discharge valve to execute a second discharge valve sequence, in which the second discharge valve is actuated from a closed position to an open position, the second discharge valve remains open for the second modified pre-set discharge time period, and then the second discharge valve is actuated from the open position to the closed position.