Solid Waste Collection Zones Optimization and Ravi Kadambala Abdul Mulla Saleh Julio Brea CDM Smith & City of Homestead 07-11-2013
Presentation Outline Background Objective Approach Data Collection and Assumptions Modeling and Optimization Results and Analysis Plan Conclusions Lessons Learned
Background The City of Homestead Public Works and Engineering Department, Solid Waste Division (SWD), is responsible for collection and management of residential municipal solid waste. Garbage twice per week Recycling Waste and bulky waste twice a month
Existing Garbage Collection System Twelve (12) Zones Twice a week from each zone. Either Monday-Thursday Or Tuesday-Friday.
Existing Bulky Waste Collection System Eight (8) Zones Twice a month from each zone.
Existing Recycling Waste Collection System 1 2 3 4 Five (1) Zones Twice a month from each zone. 5
Background The City passed an ordinance to increase collection of: Recycling and bulky waste collection from twice a month to once a week. Maintain garbage collection to twice a week
Objective Increase recycling and bulky waste collection from twice a month to once a week Coincide with existing garbage collection days Bulky waste collection to alternate each week (early/late pick up) Optimize bulky and recycling waste zones without additional staff/equipment Develop effective public communication plan Provide staff training for successful implementation of new collection zones effective January 2, 2013. Solid Collection Routes Optimization and
Approach Garbage zones were modeled to determine time required for each zone.
Approach Based on Garbage zones modeling results: The City was divided into four (4) proposed zones (identified by garbage zones) for recycling /bulky waste collection.
Data Collection and Modeling Parameters Number and type of collection equipment Collection trucks, cranes, haul trucks, etc. Size and capacity of collection equipment. Personnel available for each type of waste collection. Average amount of waste generated per week per household Garbage Recycling Waste Bulky waste Average pick-up time from waste collection equipment for the various types of waste Average speed of a waste collection equipment
Summary of Personal and Collection Equipment Type of Collection Crew Equipment Capacity Garbage Six (6) crews on different zones Six (6) Auto side loaders 33 cubic yard (5 trucks) Recycling Two (2) crews on different zones Two (2) Auto side loaders 28 cubic yard ( 1 truck) 33 cubic yard (2 trucks) Bulky waste Three (3) crews on different zones (Each crew has one crane and two dump trucks) Three (3) cranes and six (6) dump trucks 24 cubic yard (6 trucks)
Field Observation 96 Gallons Super Cans for Garbage and Recycling Waste Collection
Auto-Side Loader for Garbage and Recycling Waste Collection
Auto-Side Loader for Recycling Waste Collection
Dump Truck for Bulky Waste Collection
Crane for Bulky Waste Collection
Crane and Dump Truck for Bulky Waste Collection
Field Observation Average pick-up time Garbage from an auto-side loader was approximately 12 seconds Recycling waste from an auto-side loader was approximately 12 seconds Bulky waste using a crane and a dump truck was 1 minute Assumptions Every third (3) house generates recycling waste on a given week Every tenth (10) house generates bulky waste on a given week
Waste Generated by Household per Week Garbage Generated by Household (twice a week) 13.6 Pounds Recycling Generated by Household per week 4.1 Pounds Bulky Waste Generated by Household per week 15.6 Pounds It was assumed that pick-up point for recycling waste was every 3 rd house and the pick-up point for bulky waste was every 10 th house. Revised Waste Generated per Pick-up Point per Week Recycling Waste Generated per Pick-up Point per Week 4.11 x 3 = 12 Pounds Bulky Waste Generated per Pick-up Point per Week 15.59 x 10 = 156 Pounds
Model Development using FleetRoute FleetRoute is a GIS-based Route software Optimizes and identifies most efficient routes Determines waste pick-up time for various zones Maximizes productivity of vehicles Can integrate easily new customers into routes to facilitate expansion
Existing Garbage Zones
Existing Garbage Zones
Existing Garbage Zones
Existing Garbage Zones
Existing Garbage Zones
Proposed Recycling/Bulky waste Zones
Proposed Recycling/Bulky waste Zones
Optimization of Recycling Waste Zones
Optimization of Bulky Waste Zones
Development of Final GIS Maps
Development of Final Schedule
Plan Public Communications Plan Early residents communication, via bill inserts Followed by post cards and radio adds Magnet calendar for each four zones with collection schedules Hotline to any questions Staff Training Two training sessions with the City staff Supervised implementation for the first week
Conclusions Lessons Learned Significant effort to prepare GIS maps QA/QC of data is critical part of the modeling Early communication with residents helps Training and preparation is key for implementation Allow adequate time (4-5 months) City staff played a vital role in the project team
Questions
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