Here at Port Shepstone Precast, it is not only a goal of ours to provide quality products and first class customer service, but also to reduce our carbon footprint and employ sustainable work practices. We are committed to respecting our environment and conserving its resources, and strive for continual improvement in the area of environmental sustainability.

 

Effluent Water Purification

Our raw sewage is pre-digested in a septic tank, by anaerobic bacteria converting most of the complex organic matter into simple but toxic chemicals. The solution produced is pumped into a Bio-reactor. Air is introduced and aerobic bacteria oxidise the harmful, malodourous chemicals converting them to safe, ‘clean’ salts. At times of surge flow excess effluent is returned to the septic tank to ensure complete treatment. A clarifier is used to extract excess solids and return them to the septic tank. The final stage of treatment is disinfection, which ensures that any pathogens are removed. The water is then re-introduces to the environment exceeding water quality standards.

Concrete Recycling

Concrete Recycling is much more viable than it used to be due to high landfill costs, the expensive cost of trucking old concrete to the landfill, environmental concerns, and the advent of recycling machinery.
Recycled concrete is most often used as sub-base gravel in new construction projects.  Retaining walls and privacy fences can be made from stacked cages filled with crushed concrete.

Crushed concrete also works as dry aggregate for new concrete. If the crushed concrete is free of contaminants, it can be used as-is in the form of dry aggregate. Sometimes, however, virgin aggregate is combined with recycled, crushed concrete for making new concrete.  Large pieces of crushed concrete can be used for control of erosion, and finely ground concrete can sometimes be used as landscaping stone.

Rebar Recycling

Steel is 100% recyclable and can be recycled an infinite amount of times, saving energy and raw materials each time it is re-processed. Most steel has around 20% recycled content.

WE RECYCLE OUR EFFLUENT WATER

Our recycled water comply with international recycling standards

HOW THE LILLIPUT SYSTEM WORKS.

Process of a Lilliput® sewage treatment plant.

 

Sewage from the septic tank is constantly pumped to the Lilliput® Bio-reactor. The sewage enters the Bio-reactor below the fixed-growth media, here it is mixed by the air diffuser. Effluent/ sewage now moves upward through the system where it comes into contact with the microbes growing on the growth media. This microbial population aerobically degrades and removes organic compounds within the aerated effluent. Some nitrification occurs in the top layers of the media. After passing through the media, the treated effluent is sent to a disinfecting contact tank, it is then ready for as irrigation or released to rivers, streams, dams or storm water systems.

All Lilliput® sewage treatment plant components can be built into a single unit such as a container or building or can modular to work in difficult topographical conditions. Lilliput® components/ modular systems can be arranged to use gravity thus eliminating the need for an electrical supply, this is great for rural areas. With effluent trickling in and natural up-drafts, a residency of only five (5) minutes can be achieved. Using the treated effluent for irrigation is completely safe and helps with water conservation. For a domestic application, water savings are around 40%.