Sewerage recycle is gaining in popularity worldwide. Drought conditions, low rainfall and snowmelt combined with ever-increasing water demand from agriculture, industry and residential usage, has pushed wastewater recycle past the tipping point into the domain of proper water management.
The Flush ‘n CLLEEN™ proprietary system for sewerage recycle can recycle water for reuse for irrigation, industrial and other grey water uses, or bring it up to drinking (potable) water standards. Simply put, Flush’n'CLLEEN treatment units convert sewage into potable water and non-hazardous, garden-safe fertilizer.
The ElectroCoagulation of our Flush’n'CLLEEN treatment converts heavy metals to their “Earth-friendly” oxide forms, and kills greater than 99.99% of E. Coli, Cryptosporidium, Coliform and all other forms of bacteria.
The coagulated particles are clarified, and the sludge recovered is non-hazardous, “garden-safe” fertilizer.
The effluent is then sent through the CLLEEN™ MSF unit, where at least 70% of the water is recovered as pure H2O (less than 5 ppm TDS).
IN MORE DETAIL
CLLEEN™ Water and Power™ has combined with ElectroCoagulation specialists to produce the most energy-efficient (versus RO) toilet-to-tap sewage treatment recycle system on the market.
|1||Raw sewage is screened for non-dissolvables, that can be landfilled or recycled for compost or fertilizer as per current sewage treatment.
|2||The sewage is then sent through the electrocoagulation unit whereby a small electrical charge and the use of sacrificial metal plates, kills 99.999% of bacteria, including fecal coliform and E. Coli. This also converts any ionic metals in the water to their “Earth-friendly” oxide forms. The EC system efficacy with regard to septage treatment has been verified by two independent third-party laboratories, The University of South Florida, and The Office of Naval Research (ONR).
|3||The septage is then pumped to a vacuum clarifier, that separates the solids from the water to be recycled. The solids settle to form a non-hazardous US EPA “CLASS A” sludge, which does not need disposal in a hazardous landfill, or other special handling or carting. It can be land applied or sold as clean fill.
|4||The clarifier effluent is pumped through the CLLEEN™ Multi-Stage Flash (MSF) distillation variant. The CLLEEN™ system is a breakthrough in distillation technology. First, the feedwater is heated by the condensate of the titanium plate heat exchanger (Stage 1). Next, the heated feedwater is pumped and distributed (via a proprietary system) into the heated flash chamber and pulses of compressed air are used to increase the separation of water molecules into vapor (Stage 2), whereby the vapor is drawn off by a vacuum pump and sent through a heat exchanger.
The remaining water and TDS are collected at the bottom of the chamber as a concentrated brine. For most water treatment processes, including seawater desalination, these two steps alone would suffice to make a more concentrated brine of at between 15-30% (versus 40-50% for RO) of water by volume. The condensate is potable water of less than 5 ppm TDS. (100 times better than drinking water standards) and ammonia. The CLLEEN distillation unit distills the water to less than 5ppm TDS (100 times better than drinking water standards) and ammonia.
However, septage or sewage treatment, because of the high concentrations of ammonia and ammonium ions in the water, need secondary treatment. The concentrated brine is sent back to the clarifier in a recycle stream to remove the TDS and roughly 20% of the ammonia.
|5||The condensate is now pure H2O (less than 5 ppm TDS) and ammonia that has flashed with the vapor in the flash chamber. The condensate is pumped through a secondary CLLEEN™DA Deaerator to remove the ammonia from the distilled water stream to produce pure H2O in one stream, and liquid ammonia in another. The ammonia is then reintroduced to the solids from the clarifier to produce a nitrogen-rich fertiliser for resale, reuse or recycle.|
Because the flash chamber heats the water to above 160degF, post unit disinfection is not necessary. However, since the water is likely to be stored in tanks or storage containers, a UV system is added to ensure proper disinfection.
Contact Us for assistance with solving your sewage treatment or industrial wastewater recycle and reuse needs.
Did you know?
- About 472,653 m3 of untreated sewage was being discharged on a daily basis into the sea along the coast of the Colombian Caribbean. As a result of this sewage pollution there was massive fish mortality in areas such as the Cartagena Bay, as well as the destruction of coral reefs in areas like the Islas del Rosario, Colombia. (2006 report Caribbean Sea, Venezuela, Central America & Mexico 3bc GIWA (Global International Waters Assessment) Regional Assessment)
- The US federal government and environmental groups are pressuring Chicago’s waste water treatment firm to stop the discharge of untreated sewage into the Chicago River during storms, and to disinfect treated sewage water before the water is allowed to flow into the river. (2011 article “Pressure to Improve Water Quality in Chicago River”, the New York Times.)
- The city of San Diego, USA could save hundreds of millions of dollars in expansion costs for its Point Loma sewage treatment plant, and get more drinking water by sewage being treated to drinking water standards. It would yield 100 million gallons a day, about 20 percent of the region’s water use. (Draft study presented to city council committee ).
- As much as 850 billion gallons of sewage that has yet to be treated is being spilt into 770 US cities yearly. (Water pollution facts and statistics from the National Resource Defense Council in 2011).