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Solid Waste Collection Zones Optimization and Implementation

07-11-2013

Ravi Kadambala Abdul Mulla Saleh Julio Brea CDM Smith & City of Homestead

Presentation Outline

• Background • Objective • Approach • Data Collection and Assumptions • Modeling and Optimization • Results and Analysis • Implementation Plan • Conclusions – Lessons Learned

Solid Waste Collection Routes Optimization and Implementation

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


Five (1) Zones Twice a month from each zone.

1 4 3 2

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 Implementation

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)

28 cubic yard ( 1 truck) Recycling Two (2) crews on different

zones Two (2) Auto side loaders


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



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 3rd house and the pick-up point for bulky waste was every 10th house.

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

Revised Waste Generated per Pick-up Point per Week

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

Solid Waste Collection Routes Optimization and

Implementation

Existing Garbage 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


Implementation 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


Thank you


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