Algal system for wastewater treatment

Iowa State University technology that improves the efficiency of wastewater reclamation using algae has gotten the attention of small Iowa communities and the largest wastewater treatment system in the world. This reactor greatly improves the efficiency of carbon dioxide and sunlight absorption. We found that the biomass productivity is about 10 times higher than a conventional system,” said Zhiyou Wen, professor of food science and human nutrition who developed the system with Martin Gross, a postdoctoral fellow in the Center for Crops Utilization Research. The system uses vertical conveyor belts that are about 6 ft. tall and 3 ft. wide and revolve in a continual loop, cycling through the w

Sewage waste to farm fertiliser

The use of biosolids as fertilizer has been at the heart of much conversation in Western New York over the past few years. While some laud use of the material as an alternative to landfilling waste, others worry about its potential adverse effects on the environment. North Tonawanda may be the next community in Niagara County to get in on the biosolids movement. The common council heard a presentation last week from representatives of Canadian company Lystek about the possibility of fitting the city's existing wastewater treatment plant with a system that would allow the plant to process biosolids from the waste they’re already taking in. The council will spend the next few weeks weighing Ly

Greywater: do's and dont's

GREYWATER is the recycling of bath, shower, hand basin and laundry water, which can then be used to irrigate your garden. This is especially relevant for South Africans as they have to contend with low rainfall, water shortages and water restrictions. By reusing bath and laundry water, homeowners can keep their gardens looking healthy - even in times of drought - without spending an extra dime on their water bill. Plus, greywater also contains nutrients derived from the residues and soaps in the water, which feed and nourish the soil to produce lush plants. Do not, however, use water waste from the kitchen sink as this contains fat content that will damage your garden. A greywater system can

BioClay: A ground-breaking sustainable solution for pesticides using nanotechnology

Australian researchers say they have developed a sustainable way to protect crops from pests and diseases, by spraying them with a special clay. The discovery could also help the rural sector in the fight against pesticide resistance in certain crops. The spray is known as 'BioClay' and was developed by the Queensland Alliance for Agriculture and Food Innovation (QAAFI) and the Australian Institute for Bioengineering and Nanotechnology (AIBN). Agricultural biotechnologist and research leader, Neena Mitter, said the clay spray contained molecules that helped protect crops from invading pathogens. "BioClay is a beautiful combination of biology and nanotechnology," she said. Read more>>

Cheers! to beer made from recycled water

Every time we use water there is a natural tendency for new contaminants to be added to the water that would most likely need to be removed prior to subsequent reuse. Already we reuse effluent from our wastewater treatment facilities for irrigating golf courses and cooling the Palo Verde nuclear power plant, but significant potential exists for human consumption of reclaimed water through the use of advanced treatment technologies. However, the use of these technologies in this manner is often impacted by a lack of public acceptance of this concept. This is where the next phase of the Arizona Prize Competition comes in. In November, the sponsors of this competition awarded its $250,000 phas

Recycled water: a water resource for industries in the dry state of Arizona

The Sonoran desert, where rainfall averages just nine inches per year, may seem like an unlikely place for a high tech company with big water demands to settle. Chandler, Arizona is precisely where Intel Corporation has chosen to develop its second largest manufacturing facility in the United States. Every day, thousands of workers, dressed in white, hermetically-sealed clean suits, churn out zillions of the silicon chips that make our mobile phones, laptops and cars tick. Producing those tiny chips requires copious amounts of water for cleaning: eight million gallons of water per day, in fact, or more than what’s needed to fill 12 Olympic-sized swimming pools. So where is all that water com

Minnesota bans triclosan due to its risk to human health

Officials in Minnesota passed a controversial law that requires manufacturers to phase out their current inventory of germ-fighting agents at the beginning of the year. Major producers of triclosan-free products have already begun reducing their current inventory levels in stores. Triclosan is a well-known additive in some deodorants, toothpaste, and antibacterial soaps. Critics of antiseptic agents point to studies that suggest Triclosan disrupts the normal function of the thyroid and hormonal processes in humans. Read more>>

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