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Time: January 2011 Location: Charleston County, UK
User: Garbage Collection Department Label Type: Passive
Operating frequency: UHF Standard: EPC Gen 2
Implementing company: Sonrai Systems, Inc. Solution provider: Sonrai Systems, Inc.
Hardware Provider: Intermec
Charleston County will use the ultra-high frequency developed by Sonrai Systems
RFID
The system is installed on single-stream garbage recycling trucks and large recycling trucks used by residents to measure the increase in the county’s garbage recycling and processing.
Charleston County changed its garbage collection program to put all recyclables in one garbage truck instead of splitting them into two small ones. Currently, the county uses radio frequency identification technology to measure the increase in garbage collection caused by changes in the plan. At the same time, it is also used to locate those who have not joined the garbage recycling program, and to promote the activity by distributing educational materials to increase the enthusiasm of residents to participate.
Since January this year, passive ultra-high frequency (UHF) RFID readers have been installed on every garbage collection truck, and RFID tags have been attached to single-stream collection trucks used by residents. When the trash in the single-stream recycling vehicle is emptied, the tag data is read. This way, the number of residents participating in the program and not participating in the activity can be seen at a glance.
RFID reader installed on the garbage collection truck
In addition, the system is also used to track real-time activities of garbage collection trucks in the county. Don Ross, project manager of Charleston County and an expert on solid waste collection and treatment at Kessler Consulting, said: When the garbage collection truck goes wrong, the system can help managers understand this information in time and solve the problem as soon as possible.
Waste management plan management departments, counties, autonomous regions and municipalities have all benefited from reduced waste disposal rates and increased waste recycling rates. For example, Tony Romano, vice president of business development for RFID technology provider Sonrai Systems, said: The disposal cost per ton of garbage is between US$20 and US$200, and there is almost no recycling cost, and it may even bring additional revenue.
Encouraging residents to participate in recycling programs is a daunting task. Because it is difficult to determine the people who did not participate in the program, it is impossible to carry out targeted recycling education. Although waste management companies can measure the amount of waste collected, they have no way of knowing the number of participants and specific household information. Therefore, the recycling system is arranged based on hypothetical information, including the dispatch of trucks and the mailing of information.
At the beginning of 2011, Kessler Consulting Company proposed a pilot program: using the solution provided by Sonrai Systems, using RFID technology to improve the transparency of waste recycling. The county surveyed approximately 5,000 residents in five residential areas, and provided each family with a trash trolley, with Intermec’s Gen 2 UHF RFID tags embedded in the handle of the trash truck.
Each tag stores a unique code, which corresponds to the bar code on the trolley (RFID radio frequency bulletin: stored in the company’s database, provided by Sonrai software), and the company’s management department can access this data. When the garbage collection trolleys are distributed to the residents, their residential addresses will be included in the system and correspond to the trolley’s label code and barcode.
Three garbage collection trucks are equipped with Intermec CV30 tablets, which are connected to Intermec IV7 readers. The antenna of the reader is divided into two parts, which are respectively installed in the boom and the hopper.
As shown in the picture, the IV7 reader and CV30 tablet computer of Imagotan are installed on the garbage collection truck
The garbage collection truck picks up the trolley and empties the trash in the trash. At this time, the reader on the boom reads the tag number on the trolley, and forwards the information to the web server through the GPRS cellular connection to encode the tag. Associate with the address to which the trolley belongs, and store the record that the trolley has been emptied. Whether the trolley is emptied is sensed through the antenna in the hopper.
More importantly, the driver can install the CV30 tablet computer in the car to get the error message of the cleaning process. For example, if a garbage cleaning truck fails, there will be a prompt message, and when the garbage gets stuck, employees need to clean it up manually.
Ross said: Some valuable information was obtained from the six-month trial. For example, in the past 6 months, the amount of garbage collected has increased by about 117%, and the number of residents participating has increased from 35% to 70%. At the same time, information about residents who have not participated in the activity has been obtained.
Ross said: In addition to the educational materials distributed to encourage residents to participate in garbage collection activities, the survey data can be used well. Under normal circumstances, the garbage management dispatching staff can not detect the occurrence of garbage truck dispatching problems until noon, and this time is too late for solving the problem. For example, if the speed of a certain garbage truck cannot keep up with the plan, for example, at three o’clock in the afternoon, it is too late to dispatch other trucks to assist in the work. The use of this system contributes to the emergence of such problems to a large extent. The garbage manager observes the number and location of the residents’ carts that have been emptied to determine whether they are behind the plan, and take corresponding measures to stifle the problem in the cradle.
Charleston County is fully deploying the solution, and it is expected to increase by 5,000 by the beginning of October this year and by 30,000 by the first quarter of 2012. There are a total of 140,000 residents in the county. According to this progress, one day the RFID system will cover the entire county’s garbage collection centers. The implementation of the new system needs to be carried out in stages, and it is necessary for each recycling center to be modified to adapt to the system’s infrastructure requirements. The county will eventually be equipped with 12-15 garbage collection trucks equipped with RFID readers. Of course, the number of garbage trucks will increase to accommodate the increasing recycling volume.
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