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November 2012

Natural Environment

All South African households in large centres to separate household waste by 2016


Large amounts of recyclables disposed of at a landfill in eMalahleni. (Picture: Dr Suzan Oelofse)

A recent CSIR study revealed that only 3.3% of the country's urban population regularly recycled household waste in 2010. This finding is underscored by another study, also conducted by the CSIR, which shows that, of the estimated 19 million tons of municipal waste generated in South Africa in 2011, about 25% were mainline recyclables such as glass, paper, tins and plastics.

Separating recyclables at household level is a requirement in terms of the Waste Act. The National Waste Management Strategy requires that in four years' time all metropolitan municipalities, secondary cities and large towns will have initiated programmes for waste separation at source.

According to CSIR principal researcher Dr Suzan Oelofse, the participation of households in these programmes will be crucial to achieving the 2016 target. However, the results of the survey show that municipal authorities face a daunting task to create public awareness around the requirements of the Waste Act.

“It is alarming that two thirds of the more than 2 000 urban South African households surveyed do not know where to dispose of their household recyclables. Furthermore, the majority of the participants in the study said that they do not know how nor what to recycle,” project leader Wilma Strydom, a researcher in the waste management for development research group at the CSIR, explains.

Urban South Africans do not recycle
The 2010 survey, aimed at understanding post-consumer recycling behaviour in South Africa, does not paint a very positive picture about urban South Africans' attitude and behaviour when it comes to recycling:

  • More than 73% of South Africans living in urban areas reported no recycling at all;
  • About 27% of urban South Africans reported some recycling behaviour; and
  • Only 3.3% of the respondents indicated that they sort most or all of the selected five recyclables from their household waste and recycle it on a frequent basis.

The survey results also highlight an overall negative attitude towards recycling. Urban households are not recycling seemingly because of a lack of space, lack of time, because it is dirty or untidy, or they lack the knowledge of what is recyclable and what not. Another reason cited was inconvenient recycling facilities, says Strydom.


Municipal waste composition by source in 2004

However, the survey results also indicate that South Africans might start to recycle and continue to recycle should it be convenient to recycle: “The results show that a two-bag system – simply separating dry waste from wet waste like food scraps – combined with a regular kerbside collection service, would create the best opportunity to mobilise South Africans to start recycling. This should be complemented with communication and awareness-raising campaigns, as well as continued research to understand the drivers of recycling behaviour and how to motivate people to recycle,” she concludes.

But the story does not end here. Improved recovery of recyclables at household level will also significantly alleviate the pressure on municipal landfill sites.

Taking the pressure off municipal landfill sites
Gauteng alone generates about 45% of South Africa's municipal waste. Yet, only a few landfills in the province have a lifespan of 10 years remaining. The City of Cape Town, contributing 70% of the municipal waste in the Western Cape, is also running out of landfill airspace.

The sums are simple, declares Dr Oelofse: “The best solution for reducing pressure on available landfill space is a reduction in waste through waste minimisation and recycling.”

In an attempt to estimate the mass of recyclables disposed of at municipal landfill sites in 2011, she obtained landfill-based characterisation information from Cape Town, Durban and Johannesburg. This showed that landfill airspace is mainly consumed by green waste, recyclables and builders' rubble. Mainline recyclables – that is paper, plastics, glass, tins and tyres – contribute 25% of the municipal waste generated in Gauteng and 22% in Cape Town.



Municipal waste composition expressed as percentages by mass for Cape Town and Gauteng

According to the Department of Environmental Affairs, an estimated 19 million tons of municipal waste was generated in South Africa in 2011. “If it is assumed that the composition of waste in Gauteng is a reflection of the rest of the country's municipal waste, then it can be concluded that 25% of the 19 million tons of municipal waste is mainline recyclables. That means 4.75 tonnes of recyclables that could have been recovered in 2011.

“Furthermore, if 70% of all households can achieve a 70% recovery rate of their household recyclables, we will be able to achieve a recovery rate of 49%”, she concludes.

Contact
Dr Suzan Oelofse
soelofse@csir.co.za

 

 

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