Register Here

The Technical Tours will take place on Friday the 8th of October 2010.

ENVIROSERV’S HOLFONTEIN CLASS H:H WASTE DISPOSAL FACILITY

Please note that this tour is  limited to 120 people.

A highlight of Wastecon 2010 will be a tour of EnviroServ Waste Management’s Holfontein H:H landfill site in Springs, Gauteng.

Established in 1990, Holfontein is one of only three commercial H:H landfills in South Africa. The total area of the site is approximately 67.3 ha with a total available airspace of approximately 12 million m3. Approximately 6.5 million m3 has been or is being used in seven waste disposal cells.

The site accepts 27,000 m3 a month Class 1 to Class 4 hazardous wastes from Gauteng, North West, Mpumalanga, Northern Province and sections of the Northern Cape and Kwa-Zulu Natal.

Some of the operational aspects that will be reviewed during the site tour include:

  • Cell Design: During 2010, EnviroServ hopes to receive the necessary permits to develop the remaining 5.5million m3 of airspace and allow for continued waste deposition at Holfontein until approximately 2023.  To date cells excavated below ground water level to maximise the available airspace, acquire clay for the compacted clay liners and stockpile clay for the final capping. The construction of cut-off drains to channel ground water away from the waste body is proving to be intricate and costly due to restricted space around the toe line. These challenges have led to a change in philosophy. Excavation will not go below groundwater level to allow for passive control measures in future cells.

  • Leachate Treatment Plant (LTP): In an effort to meeting the requirements related to ‘no liquids to landfill, the LTP plant was commissioned in September 2003.  The plant can treats both stored leachate and fresh leachate produced by the various cells. The final effluent is then re-routed to the cooling process, resulting in zero effluent discharge from the site. The evaporator/crystalliser pilot plant substantially reduces both the inorganic and organic levels in the leachate. Varying the pH of feed leachate also provided a way of controlling the chemical oxygen demand (COD) levels in the condensate.

  • Waste Treatment: Holfontein pioneered the use of continuously-poured concrete silos to encapsulate toxic wastes. Waste in stored in drums which are placed inside the 18m in diameter and 11.2m high silos before being encapsulated in concrete.  During 2010 EnviroServ hopes to introduce a new micro-encapsulation technology that reduces the hazardous nature of toxic waste, allowing for conventional disposal.

  • Air Quality Monitoring: A comprehensive Air Pathway Analysis System was pioneered at the Holfontein site. This system is now implemented on eleven other waste disposal sites in the country with great benefit to the operators of the sites, the employees and the communities who live in the vicinity of the site.  Gases and particulate matter are sampled. The results are interpreted in terms of the health, odour and environmental impacts of the site. An Off-site Source Emissions Inventory along with Air Dispersion Modeling and health/odour analysis helps to determine appropriate buffer zones and/ or zones of influence.

  • Community Engagement: The Holfontein Monitoring Committee consists of authority, management and community representatives.  It has evolved over the years from a forum where the existence of the site was fiercely contested to a genuine monitoring committee with members have access to all relevant data including waste streams, tonnages received, and air/water/soil quality reports. Independent annual audits are presented to the committee.

  • Community Skills Development Program: The communities surrounding Holfontein have been inextricably involved with the site since inception, providing both skilled and unskilled labour. While the specialist skills and construction standards required ion this complex field have in some cases blocked the use of emerging local contractors, site management encourages specialist service providers to use community resources where possible.

  • ISO 14001 Certification: The site has complied with the internationally recognized ISO 14001 Environmental Management System (EMS) since 2004.

 

Ekurhuleni Metropolitan Municipality - Weltevreden Landfill

The Ekurhuleni Metropolitan Municipality invites you to a site visit at the Weltevreden Landfill to showcase some of its innovative projects. 

Enviro-Fill Material Recovery Facility
The MRF at Weltevreden is based on a modular system that can be extended as the waste stream grows or removed once the contract has expired without incurring excessive costs  for the removal thereof.

The material recycling facility consists of a number of converted sea freight containers that are stacked on top of each other and equipped with a conveyor picking belt that runs on the inside of the containers and a waste collection container at the end of the picking belt where the organics will be removed and taken to the working face or composting area for disposal.

CDM Gas Recovery and Destruction Project
Weltevreden is one of the four EMM sites forming part of a CDM project under the Kyoto Protocol.  The various elements of a CDM project will be demonstrated, from gas extraction, to conveyance and finally to destruction.  The two main forms of welling systems, vertical and horizontal, will also be demonstrated.

Sanitary Landfill Practice
The Weltevreden landfill is known for its high operational standards.  Sanitary landfill practice will be demonstrated on the working face to illustrate the effect and efficiencies of disposing of waste in the correct manner.

This is definitely a tour not to be missed. Register now as space is limited!!

  

 

Hosted by: