Materials recovery facility process optimization via unit operation feedback
Methods and systems are provided for controlling an automatic separator apparatus of a Materials Recovery Facility. A separator for separating a stream of recyclable paper and containers into a paper stream including primarily paper and a container stream including primarily containers is provided. The separator has at least one adjustable operating parameter. A first detector detects an amount of container contaminants in the paper stream. A second detector detects an amount of paper contaminants in the container stream. A control system operably connected to the separator and the first and second detectors adjust the adjustable operating parameter so as to reduce a combined measure of contaminants in the paper stream and in the container stream.
1. A separator system, comprising:
a separator for separating a stream of recyclable paper and containers into a paper stream including primarily paper and a container stream including primarily containers, said separator having at least one adjustable operating parameter;
a first detector for detecting an amount of container contaminants in said paper stream;
a second detector for detecting an amount of paper contaminants in said container stream; and
a control system operably connected to the separator and the first and second detectors for adjusting the adjustable operating parameter so as to reduce a combined measure of contaminants in the paper stream and the container stream.
2. The system of claim 1 , wherein the combined measure of contaminants equally weights the contaminants in each of the paper stream and the container stream so as to minimize total contaminants.
3. The system of claim 1 , wherein the combined measure of contaminants favors a reduction in contaminants of one stream at the expense of an increase in total contaminants.
4. The system of claim 1 , wherein:
the separator is rotary disc screen having a V-shape cross-section, and having at least three adjustable operating parameters including a V-angle, a chute tilt angle and a rotational speed of the rotary discs.
5. The system of claim 1 , wherein:
the separator is an inclined rotary disc screen having at least two adjustable operating parameters including angle of inclination and rotational speed of the rotary discs.
6. The system of claim 5 , wherein the adjustable operating parameters also include a flow of air onto a face of the screen.
7. The system of claim 1 , further comprising:
a paper stream separator for receiving the paper stream and separating container contaminants from the paper stream; and
a container stream separator for receiving the container stream and separating paper contaminants from the container stream; and
wherein the first detector is associated with the paper stream separator and includes a first sensor for identifying whether each item of the paper stream is paper; and
wherein the second detector is associated with the container stream separator and includes a second sensor for identifying whether each item of the container stream is a container.