Search results
Results from the WOW.Com Content Network
The number of landfills has decreased in the last 30 years, but they have become bigger and more sophisticated. [38] NSW has the largest disposal plant in Australia. [38] Landfills are planned to manage the flow of leachate and gas produced by the waste. [54]
Samples from raw and treated landfill leachate yielded 58 complex organic contaminants including 2-OH-benzothiazole in 84% of the samples and perfluorooctanoic acid in 68%. Bisphenol A, valsartan and 2-OH-benzothiazole had the highest average concentrations in raw leachates, after biological treatment and after reverse osmosis, respectively. [6]
A 2016 investigation by Hong Kong's Environmental Protection Department (EPD) found that SITA failed to meet their contractual obligation to maintain a minimum temperature of 1,000 °C for the flaring of landfill gas in the leachate treatment plant at the closed Pillar Point Valley Landfill, in an attempt to save fuel expenditure. [6]
Once a landfill site is full, it is sealed off to prevent precipitation ingress and new leachate formation. However, liners must have a lifespan, be it several hundred years or more. Eventually, any landfill liner could leak, [7] so the ground around landfills must be tested for leachate to prevent pollutants from contaminating groundwater.
The landfill must have at least two impermeable liners as well as a system for leachate collection to prevent any water contamination. In addition to this, the landfill must also have a groundwater monitoring system in case there is a leak; the wells can be pumped to remove the contaminated water for treatment.
Sewage treatment plant (a type of wastewater treatment plant) in La Crosse, Wisconsin. Wastewater treatment is a process which removes and eliminates contaminants from wastewater. It thus converts it into an effluent that can be returned to the water cycle. Once back in the water cycle, the effluent creates an acceptable impact on the environment.
Landfills are the primary method of waste disposal in many parts of the world, including United States and Canada.Bioreactor landfills are expected to reduce the amount of and costs associated with management of leachate, to increase the rate of production of methane (natural gas) for commercial purposes and reduce the amount of land required for land-fills.
Agenda 21 was designed for countries to "commit to waste minimisation, environmentally sound waste reuse and recycling, and environmentally sound waste treatment and disposal." [3] In an attempt to encourage recycling, Australian states started imposing higher levies on landfills after 2006. This caused a reduction in landfill waste as the high ...