Since 1800, several urban wastewater treatment strategies and technologies have been implemented. These strategies can be categorized as either centralized, where all the wastewater is collected and conveyed to a central location for treatment or disposal, or decentralized, where the wastewater is primarily treated or disposed of onsite or near the source. The history of urban wastewater treatment management in North America has shown a circular tendency.
Up to the Middle of the nineteenth century
Decentralized wastewater treatment concepts (e.g., privy vaults, cesspools, dry sewage collection) were predominantly used in urban and rural areas.
Middle of the nineteenth century up to the 1990's
During that period, the decentralized privy vault-cesspool system became inadequate and was gradually replaced with centralized water-carriage (sewer systems) for several reasons: (1) failure to keep pace with population growth; (2) construction of public water supplies and water closets; (3) public health concerns; (4) limited technology transfer; (5) socioeconomic considerations; and (6) a lack of alternative solutions. Up until recently, conventional sewers have been the preferred wastewater management strategy in North America.
The reduction in past years of federal and provincial grant money for the construction of sewers, especially in less dense urban development patterns, required municipalities to search for cost-effective wastewater management alternatives. The development of performing and easy to install and maintain septic installations were a necessity. A better understanding of the fundamental treatment processes has therefore resulted in the development of innovative decentralized technologies. They integrate easily with traditional plumbing fixtures and do not require a significant life-style adjustment. These technologies answer the need of most people that their wastewater treatment system be unobtrusive, convenient, and not require significant maintenance efforts on their part.
Protecting the environment and drinking water supplies at lower costs
Decentralized systems currently serve approximately 30 percent of North America's population. They have been shown to save money, to promote better watershed management, and to be suitable for a variety of site conditions. Research has improved the operation and management of septic systems and developed innovative and improved onsite treatment technologies, e.g., biofiltration, intermittent and recirculating packed-bed filtration.
PREMIER TECH AQUA
Premier Tech Aqua is a major player in the onsite and decentralized wastewater treatment industry. We offer a full range of technologies and services for the residential, commercial, municipal and industrial sectors.
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