The SPP-CDW Series Closed Loop Recycling Plant is a high technology Mixed Waste Processing system that recovers and converts up to 2500 M³ of Construction and Demolition Waste (CDW) per day into recyclable materials.

The Plant is divided into three operational phases to process mixed waste:

1) Pre-treatment uses automated mesh and magnetic separators to recover sand, soil and scrap metals.

2) Main Process uses an automated water processing system to separate and output Clean Plastic Film (purity over 99%), Heavy Plastic matter.

3) Recycle Material processing converts to Plastic Pellets/Pallets and RDF (Refuse Derived Fuel).

Construction and Demolition Waste (CDW)

According to a NAHB Research Center Report, estimates of total CDW for the US vary considerably but is estimated to be about 40 million tons per year, which constitutes approximately 20 percent of the 225 million tons of waste generated annually in the US. Construction waste generation is, of course, directly tied to building activity, which, in turn, is most closely linked to overall economic activity in each community or region.

Most CW (Construction Waste) is put into landfills, increasing the burden on landfill loading and operation. Waste from sources such as solvents or chemically treated wood can result in soil and water pollution.

Some materials can be recycled directly into the same product for reuse. Others can be reconstituted into other usable products. Unfortunately, recycling that requires reprocessing is not usually economically feasible.

In Tokyo, the CW production rate is about 601 million tons M³ in 1995 with a reuse rate of only 6%. 46% goes into Landfills, 42% can not be recycled.

To construct on a mixed waste landfill space, the waste must be buried for several years to neutralise and exhaust miasmatic. 200 million M³ of mixed waste is left waiting the government approval for more Landfill space.

The bulk of mixed waste from CW can be recovered and recycled with the
SPP-CDW series mixed Waste Processing Plants.

1. Pre-treatment Processing Equipment for Construction Waste   1000 M³/Day

2. CDW Processing

Many CDW materials are still recyclable.

• By weight or volume, wood, drywall and cardboard make up between 60 and 80 percent of job site waste.
• Vinyl and metals are generated in small quantities, but have good recycling value.
• Most wood waste is ‘clean’ - unpainted, untreated and recyclable.
• Brick and Masonry waste are insignificant in volume, but can be important in terms of weight.

SPP-CDW recycles all the waste and the landfill can then be used for other purposes.

Plastic waste is recovered and separated into light plastic (PE, PP) and heavy plastic (PVC, PET, OPP). Light plastic is further processed into plastic film, while heavy plastic is processed into refuse derived fuel (RDF).

With the SPP-CDW Series, the environmental and economic impact of CDW disposal is considerably less than traditional methods, since only a fraction of the incoming waste is ultimately transported and disposed of through incineration or landfills.

The SPP-CDW separates valuable vinyl from mixed waste. After the CDW pre-treatment process, plastic content rate is increased from 5.5% to 53.9%

SPP-CDW Plant Profit (China Example)

The example is based on the Chinese plant. Obviously other countries would have a different CDW composition, pricing and costs.

U.S. national average tipping fee for construction waste disposal has increased from a reported $4.9 per ton in 1976 to $32 per ton in 1992, for an inflation-adjusted increased of over 300 percent. Tipping fees in certain areas of U.S. exceed $100 per ton.

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