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- COMPOSTING AND THE GROCERY INDUSTRY
-
- The following bulletin was prepared from Grocery Industry Committee
- on Solid Waste
- October 24, 1991
-
- EXECUTIVE SUMMARY
-
- Solid waste composting is an important component of an integrated
- solution for solid waste management. Composting can divert
- organic, compostable materials, not otherwise recycled, from the
- solid waste stream and convert them into a useful product.
- Composting is environmentally sound, technically and economically
- feasible and meets local waste management needs.
-
- This report, from the Grocery Compost Task Force to the Grocery
- Industry Committee on Solid Waste (GICSW), is intended to establish
- composting as a viable and sustainable component of an integrated
- solution for solid waste management. To do this the industry
- supports the development of composting systems for grocery
- manufacturers and retailers, and the development of the supporting
- infrastructure. Composting can handle from 30 to 60 percent of all
- municipal solid waste, including food waste, yard waste and paper
- and paperboard waste.
-
- The grocery industry is committed to a high level of product
- stewardship. This commitment includes the environmentally sound
- management of wastes generated at the retail levl as well as wastes
- from grocery products after they have been sold and used by
- consumers. Much of this waste is organic in nature and landfilled.
-
- From a product stewardship perspective the grocery industry
- believes that composting is a more environmentally sound management
- practice than disposal for managing these wastes. While single
- stream and segregated stream composting may be more readily
- available for many manufacturers' and retailers' own waste, MSW
- composting is an attractive alternative for waste created by
- consumers.
-
- This report focuses on grocery retailer composting programs, but
- will also address goals and programs for manufacturers.
-
- Food waste plus wet and waxed corrugated from retailers alone
- accounts for 6.6 million tons per year of waste that could be
- composted rather than discarded, which is nearly 4 percent of all
- municipal solid waste (MSW). Disposal of those wastes costs the
- grocery retailers $482 million per year, eating up the pre-tax
- profits from $34 billion of grocery retail sales.
-
- All food waste produced directly by manufacturers and retailers, as
- well as home food waste produced by grocer shoppers, comprises
- nearly 20 percent of the entire grocery industry's wastes. On a
- store level, over 90 percent of the solid waste is deemed by this
- task force to be most representative of a "typical" store, produce
- 43 percent of their waste as food waste. Almost all corrugated is
- recyclable or compostable. 30 percent of the corrugated produced
- by a grocery store is either wet or waxed, precluding its
- recyclabiliy.
-
- Composting can achieve important benefits for the grocery industry
- including:
-
- 1. Meeting the demands of grocery customers who are demanding more
- environmentally sound and responsible ways of managing solid waste;
- 2. Proactively controlling waste disposal tonnage and expenses;
- 3. Supporting governmental initiatives for landfill diversion and
- material recovery;
- 4. Encouraging recycling of other materials; and
- 5. Making the best use of natural and man-made resources by
- converting organic waste into compost instead of landfilling them.
-
- Each grocery industry facility should evaluate how best to handle
- its compostable waste. As detailed in the report, there are
- several possible approaches to handle mixed organics from the solid
- waste stream. Regardless of the approach, it is important for the
- industry to help establish a composting infrastructure. Market
- development is a key element of this infrastructure and the grocery
- industry supports market development initiatives.
-
- Depending upon the compost program, compost processors may require
- or prefer source-separated homogeneous food wastes to obtain
- maximum control over end-product quality. Source-separated
- materials may have greater value to the end user because of the
- densification and readiness for processing, and therefore may lead
- to lowest collection and processing costs for the generator.
-
- For grocery retailers, this report focuses on segregated stream
- composting. Because the industry can generate a source-separated
- product, free of harmful wastes and relatively free of inert
- materials, it can easily be integrated into whichever composting
- program is most likely to be available locally.
-
- This report explains the various ways to handle, collect, transport
- and process grocery store wastes for composting. In general, the
- GICW recommentds:
-
- * Collection of compostables in dedicated barrels;
- * Pickup and transportation of the compostables either by
- loading barrels into a truck or by emptying the barrels into a
- dedicated dumpster or compactor for collection by a hauler;
- * Composting at the best locally available site; and
- * Careful training of store employees to maximize participation
- and minimize contamination.
-
- Several specific recommendations addressing issues such as economic
- analysis, health issues, facility flexibility and recommended
- implementation steps are included.
-
- This report also discusses Municipal Solid Waste (MSW) composting.
- MSW composting, as described here, refers to the composting of
- residential and commercial separated mixed organic waste, with the
- recyclables and other noncompostable materials removed. Separation
- may occur at curbside or the waste may not be transported by
- conventional waste vehicles to a central site for the site
- separation of compostable materials from noncompostable materials.
- There are 15 MSW composting facilities currently available in the
- U. S. Another 150 are in various stages of planning or development
- (a new MSW facility can take 3-4 years to site, build and become
- operational). Where they do exist, they should be considered by
- grocers for composting. The availability of an organic fraction
- from the grocery industry will be added impetus for development of
- community based facilities.
-
- The mixed organics method of collecting compostables should require
- little or no change in supermarket operating methods since material
- separation is accomplished on the other end by the receiver or end
- user.
-
- All composting facilities need to use the best technology available
- to ensure production of compost that is safe and marketable.
- Attention must be given to the separation of compostable materials
- from recyclables and noncompostable waste.
-
- Many state and local governments, federal government through EPA
- and the Solid Waste Composting Council (SWCC) are addressing
- composting. In addition, composting. The GICSW should work with
- these entities toward the common goal of developing composting as
- a viable solid waste management tool.
-
- In order to develop end markets, the grocery industry should
- demonstrate and confirm the beneficial use of compost and
- aggressively promote the marketing of the product, specifically to
- known end users. Product standards and end markets for compost are
- in the early stages of development. Standards for end-product
- quality do not exist on a federal level but are beginning to be
- promulgated on a state-by-state basis. Currently market
- development is planned or in progress in 11 states. The GICSW
- should become involved in market development, establishing science-
- based standards, ensuring product quality, establishing pilot
- programs and supporting compost legislation. Specifically, the
- GICSW can play a role in opening new outlets for compost in the
- agricultural community.
-
- The industry should move towards setting and measuring attainment
- of goals to support the development of composting, such as:
-
- * The production of recyclable and/or compostable consumer
- packaging.
- * The recovery, through composting, of an annually escalating
- proportion of manufacturer and retailer wastes.
- * The recovery, through composting, of an annually escalating
- proportion of consumer wastes
- The grocery industry should make a serious effort to publicize the
- GICSW's environmental philosophy and actions, and to educate
- consumers, the general public, the grocery industry and the solid
- waste community. In all cases, the GICSW recommends extreme
- caution against overstating any facts, expectations or
- interpretations.
-
- The GICSW recommends that grocery manufacturers and retailers
- implement a list of specific action items as soon as possible in
- order to promote grocery industry composting.
-
- Composting is an important emerging solid waste management method
- that holds great promise for grocery manufacturers, retailers and
- communitites. As the cost of disposal spirals upward, and the
- economics of composting improve, composting is becoming an
- increasingly cost-effective means of controlling waste expenses.
-
- Composting is also a more environmentally responsible option than
- landfilling and grocery customers are constantly raising their
- level of expectations in favor of this kind of environmentally
- responsible behavior.
-
- This report should facilitate the successful implementation of new
- composting programs, and addresses policy issues that will support
- composting nationwide.
-
-
-
-
- 3.0 ROLE OF THE GROCERY INDUSTRY
-
- Significant Portion of the Waste System
-
- As shown in Exhibit A, RIS estimates that 19.5 percent of the solid
- waste generated directly or indirectly by the grocery industry by
- weight is food waste. This analysis includes manufacturers and
- retailers, as well as home waste from grocery shoppers. Containers
- and packaging represent a significant portion of the waste stream,
- some of which is organic and can be composted.
-
-
- While a grocery manufacturer's compostable wastes are highly
- dependent upon the products made by that manufacturer at any given
- site, the compostable wastes from retailers are more consistent
- from one grocery store to another. Keeping regional differences in
- mind, grocery store compostable wastes include food waste, waxed
- and wet corrugated, bakery waste, dairy products, produce, floral
- seafood.
- From January through April 1991, FMI conducted a waste composition
- survey, with 27 food retailers and wholesalers responding. The
- data represented in these exhibits should serve only as a guide as
- waste compostion may vary depending on store format and offering.
- The survey respondents were separated into three groups:
- * wholesalers (Exhibit B);
- * large supermarket chains, definded as having more than 50
- stores (Exhibit C); and
- * small supermarket chains having 50 or fewer stores (Exhibit
- D).
-
-
- According to this survey, over 90 percent of the waste generated by
- each of these categories is recyclable or compostable.
-
- Small chains showed a large proportion of their wastes were
- comprised of food wastes (43 percent). Wholesalers reported a
- small fraction of food waste, since the wholesalers surveyed
- generally did not trim or process perishable, unpackaged food as
- retailers often must do.
-
- The small fraction of food waste (10 percent) among large chains is
- likely due to the fact that many large chains have de facto
- wholesale facilities in-house, and so the relative proportion of
- corrugated is greater. This large corrugated proportion reduces
- the relative proportion for food waste to only 10 percent.
- However, if dry, non-waxed corrugated containers (OCC) are
- recycled, then between 75 percent and 90 percent of the remaining
- waste is compostable food waste and paper. (This percentage
- fluctuates depending upon how much wet and waxed OCC is available
- for composting rather than recycling.) Thus, even for a "large
- chain" that generates a relatively smaller percentage of food
- waste, the waste actually being disposed is mostly compostable.
-
- This task force believes that the composition shown for small
- chains (Exhibit D) is most likely to represent the composition of
- most typical retail grocery stores, excluding distribution and
- warehousing operations. Accordingly, it is significant that such
- a large percentage-43 percent- of this waste is compostable food
- waste. From a waste management perspective, recycling of food
- waste via composting at the retail level is as important as
- recycling corrugated boxes.
-
- The FMI composition survey did not differentiate between recycled,
- wet or waxed corrugated. Based on a sampling of three grocery
- stores in 1991, 70 percent of the corrugated containers are
- compostable (Exhibit E). These statistics enabled the task force
- to estimate the volume of compostable food waste, wet and waxed
- corrugated produced by grocery retailers at 6.6 million tons per
- year. *
-
- The conclusion is that the grocery industry as a whole is a large
- producer of wastes that are potentially very compostable. The
- compostable food waste and corrugated alone from grocery stores
- comprise nearly 4 percent of all municipal solid waste (MSW):
-
- * Retail grocery food waste, compostable wet and waxed corrugated
- /all MSW (EPA, 1990) = 6.6 million tons / 179.6 million tons =
- 3.7 percent.
-
-
- Financial Significance of Compostable Wastes
-
- Futhermore, disposal of these wastes is increasingly expensive.
- The National Solid Waste Management Association (NSWMA) has not
- completed its recent national landfill tip fee survey. However,
- extrapolating from the 1988 national average tip fee to 1991 based
- on the recent FMI disposal expense survey yields an average tip fee
- of $58 per ton for landfills. Tip fees for incinerators may be
- significantly higher. After adding a conservative hauling charge
- of $15 per ton, grocery retailers alone are paying $482 million
- each year to dispose of their compostable wastes:
-
- * 6.6 million tons per year of compostable wastes X ($58/ton tip
- fee + $15/ton hauling fee) = $481.8 million/year in grocery
- retailer disposal expense.
-
- To cover the expense needed to pay for their $482 million per year
- disposal cost of compostable wastes, grocery retailers must, at an
- FMI-estimated pre-tax net profit rate 14.3 percent of sales, sell
- $33.7 billion in groceries:
-
- *$481.8 million disposal expense / 1.43 percent pre-tax net
- profit = $33.7 billion in sales.
-
- Because individual grocery manufacturers have such product-specific
- waste streams, a similar expense for the industry overall is
- difficult to estimate. However, it is clear that, for retailers
- and manufacturers, the cost of disposal is spiraling upward. FMI
- documented a 26.6 percent increase in disposal costs for its
- members in 1988 and a 29.2 percent increase in 1989. This is
- undoubtedly one of the fastest growing expense items for
- manufacturers and retailers.
-
- It is interesting to note that by simply recycling corrugated boxes
- and composting all compostable wastes, a grocery store can reduce
- the amount of waste being landfilled by approximately by 89 percent
- (Exhibit D).
-
- The Composting Option
-
- Composting grocery store waste is an attractive option since this
- waste is consistent in quality and quantity. These materials
- compost readily and are especially effective when co-composted into
- existing programs with yard waste, wood waste, manure, with other
- clean corrugated. However, they are compostable and can provice
- necessary bulk to the composting process.
-
- By supporting and participationg in local composting operations,
- the industry can serve to encourage broad-based development of
- composting as an integral part of local solid waste management.
- Initially, pilot projects could serve as working examples that
- composting can be accomplished successfully in order to reduce the
- landfilling of grocery industry wastes.
-
- While grocery manufacturer and retailer wastes may be composted in
- a segregated stream process, MSW composting is an important option
- for the wider range of organic materials that are produced by other
- businesses and by grocery consumers.
-
-
- 4.0 GROCERY INDUSTRY OBJECTIVES
-
- The grocery industry can set an example for the community by
- practicing sound recycling and composting activities. Some
- significant objectives that the grocery industry can achieve by
- composting are:
-
- 1. Meeting demands of grocery consumers that stores and
- manufacturers be environmentally responsible;
- 2. Proactively controlling waste disposal tonnage and disposal
- expenses, which are increasing rapidly;
- 3. Supporting EPA, state and local government initiatives for
- landfill diversion and material recovery;
- 4. Encouraging and enhancing recycling of other recyclable
- materials, such as plastic, wood, glass and metal through improved
- separation; and
- 5. Making the best use of natural and man-made resources by
- converting organic waste into compost instead of landfilling them.
-
-
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