Municipal Solid Waste Recycling (MSW) Processing Systems
The “Dirty MRF” or Municipal Solid Waste Recycling (MSW) Processing is the final evolution of Single Stream Recycling with system designs that process non-source separated waste into organic material streams, recyclable commodities and trash.
Common ask Questions about Green Machine’s Waste Recycling Systems
What does your company currently offer and how does the system work?
Our system design places profitability ahead of recovery rates. Most large scale MSW processing plants fail primarily because they are too costly to deploy, too costly to operate and produce a contaminated recyclable material product. It is our philosophy to process large tonnages at the lowest processing cost per ton while capturing the high value recycling commodities at recovery rates that don’t adversely affect throughput.
What materials is the system designed to sort?
Our systems designs process both dry and wet MSW waste and can accommodate removal of most commodities but we find that the systems which concentrate on the sorting of large OCC, Mixed Paper, Mixed Plastics, Ferrous and Non-Ferrous recyclable materials with a fines removal capability are the most profitable.
How does a system design figure into overall operational efficiency?
Our system efficiencies depend on proprietary screening technologies, automatic optical sorters, typical magnetics producing an 60 TPH throughput with as few as 11 total force with 30% + recyclable material diversion rates. We find that to be a sweet spot where clean recyclables are collected and customers over all investment / operating costs reach maximum profitability.
GREEN MACHINE® offers over 30 years of experience in the handling and processing of municipal solid waste recycling. Early experience in (Dirty MRF) design has helped our current higher tech systems meet the demands of all material processors. As our industry evolves, most indicators show that (MSW) recycling will someday replace (Single Stream) mixed recyclable processing. Our vast experience in various material mixes and unique maintenance criteria have Green Machine® poised to be a leader in this inevitable evolution. Whether your needs are for a Front–end separation for Waste Conversions or an economical solution for diverting high value recyclables from land filling GREEN MACHINE® has the solution.
Municipal Solid Waste Recycling (MSW) Processing
1. Vibrating Pan Feeder
Step 1 is designed for rugged operation and is isolated from loader or material shock damage by having the entire vibrating body resting on steel coil springs. Pan and sides are lined with various materials depending on the operation. Vibrating body is designed to withstand the necessary high gravity force stroke required (3 G’s minimum and higher) to efficiently Accept, Meter, Segregate, mitigate glass breakage and material “fluffing” as well as evenly feed MSW to the downstream process equipment. These items are critical to efficiently processing MSW.
2. Infeed Up-take Steel Pan Apron Chain Belt Conveyor
Step 2 is constructed in such a manner to accept material from Item 1 and runs at a faster speed than Item 1 to improve the material separation and presentation to down stream equipment.
3. Modular “Brute Force” Vibrating Multi-Surface Screen
Step 3 is designed for rugged operation and is isolated from material shock damage by having the entire vibrating body resting on steel coil springs. Pan and sides are lined with various materials depending on the operation. Vibrating body is designed to withstand the necessary high gravity force stroke required (3 G’s minimum and higher) to efficiently Accept, Feed, Segregate, Separate, mitigate glass breakage as well as evenly feed MSW to the downstream process equipment. These items are critical to efficiently process and separate MSW into distinctly separate processing streams by size and characteristic.
4. Vibrating Multi-Surface Screen Over Sized Material Take Away Sorting Conveyor
Step 4 is constructed in such a manner to accept processed material from Step 3, (top screen surface over sized) and conveys at a faster speed than Step 3 to improve the material separation and presentation to manual pickers and down stream equipment.
5. & 6.Vibrating Multi-Surface Screen Middle Sized Material Take Away Transfer Conveyor, Vibrating Multi-Surface Screen Middle Sized Material Take Away Sorting Conveyor
Steps 5 & 6 are constructed in such a manner to accept processed material from Step 3 (top screen surface under size and bottom screen surface oversize) and conveys at a faster speed than Step 3 to improve the material separation and presentation to manual pickers and down stream equipment.
7. Vibrating Multi-Surface Screen Under Sized Material Take Away Transfer Conveyor
Step 7 is constructed in such a manner to accept processed material from Step 3 (bottom screen surface under size) and conveys at a faster speed than Item 3 to improve the material separation and presentation to down stream equipment.
Steps 8,9,10 Step 4 Over Band Cross Belt Magnet, Item 5 Over Band Cross Belt Magnet Item 7 Head Pulley Permanent Magnet
Steps 8,9,10 are constructed and positioned in such a manner to remove ferrous particulate as the final stage of recyclable materials. The magnetic separation equipment is located in optimum places to provide efficient and effective removal of ferrous metal.
11. Elevated Sorting and Picking Personnel Work Platform
Step 11 picking station is designed with efficiency and safety to maximize manual sorting efficiency and effectiveness. Picking locations have material drop chutes positioned over the sorted material containment bunker for hand sorted material segregation and containment.
The “Dirty MRF”
By Steve Last
When many of us see the term MRFs we think that the official name for these facilities is a Material Recycling Facility, and this in many ways is what they are. However, waste management professionals will tell you that the correct term for them is Materials Recovery Facilities (MRFs).
MRFs are a waste management option specifically linked to recycling, bridging the gap between collection of recyclables and reprocessing. However, it has not strictly been correct in many districts in the past to have said that they were solely for the purpose of recycling. Both within and outside Europe (the EU) a proportion of the waste is now and will be for the foreseeable future, sent to landfill. In a commercially based and unregulated MRF only those materials which could profitably be recycled by the operator would be.
However, due to public pressure and in principle environmentally sound reasons in most parts of the world it has been found that recycling should not just be a largely voluntary activity carried out only where the market provides an economic benefit from such recycling. Due to risk and price volatility in the recycled materials market, without government encouragement, recycling has simply just not been taking place to the extent that, any consideration of the long sustainability of civilization, was going to need.
In short, society was rapidly moving toward the point of burial under its own rubbish. Worse and more pervasive still was, and is still, the danger from the gradual contamination of groundwater around the landfills, by the landfills. If this was allowed to continue might have a far more serious effect on the health of society than the rubbish itself. The reason for this being that so many areas rely on their groundwater for drinking water.
Therefore, MRFs perform an increasingly important role for communities in many countries. Indeed, many more of them are going to be needed to provide much increased waste recycling, in each and every district, of all our towns and cities. MRFs are also essential to the planned reduction in the amount of organic matter which will be sent to landfills throughout the EU.
This is recognised by the UK government as they form an important role within the Government's Waste Strategy 2000 (DETR 2000a and DETR 2000b), which predicts that as many as 316 MRFs (DETR 2000b: 194) will be required to meet its aims in England and Wales alone. Why reduce organic matter being sent to landfills? The reason is that the organic matter is the main source of pollutants in any Municipal Solid Waste landfills.
So, at its core any Material Recovery/Recycling Facility is a waste disposal facility that separates the recycling material before it is sold on and recycled, and as far as possible, they are operated to be as "self funding" as possible. However, although all council and private MRF operator's waste services departments do attempt to identify sustainable and profitable markets for the recycled material, into which they sell their recovered materials, the earnings created do not come close to meeting the very high operating costs.
It is interesting to note that the UK Waste Strategy 2000 recognises that a system based on new facilities and extensive separate kerbside collection of recyclables will be an important element in meeting recovery targets. But, the driving force in this process is the attainment of the targets, and any revenue from this is incidental. In the document, it states that it is hoped that this may increase the economic viability of recycling schemes, including kerbside collection, by allowing localized sorting of materials (see paragraphs 5.19 - 5.22). As stable markets develop and a demand is established for the recyclates, it may be that the value of the recycled materials rises. However, this is only a hope of government, and cannot be guaranteed.
So, recycling initiatives and operations are driven by the need to meet statutory targets. Recycling involves collecting materials that can be marketed to produce more products containing a percentage of recycled materials such as paper, cardboard, cans, glass and plastic bottles. The process means that less raw materials will need to be mined (metals) or grown (trees) and less energy will be consumed in the manufacture of new products.
Now you have read this article you will not be one of those ignorant of the important role of the MRF in your district. In fact waste management is far from a boring subject, and there are rapid developments in the technology and large expansion plans taking place right now.
There many new ideas and new opportunities to discovery in the new Waste Technologies. Find out more about what MRFs are, plus you will learn about many other types of waste technology. These exciting new technologies will help ensure a sustainable future for society, and the health of future generations.