Using plants to purify wastewater
Article Abstract:
Wastewater can be purified by using one of John Todd's Living Machine Systems. Commercially developed by Living Technologies, the Living Machine Systems uses a combination of plants, snails and microorganisms to purify wastewater as it flows through different tanks. Beginning at a tank that contains crustaceans, rotifers and ciliates, the wastewater's pathogen load is reduced and transferred to a settling tank for biosolids to drop to the bottom. The water then flows on to a fish pond, before shifting to reactors planted with tropical vegetation for a final treatment. Some 21 Living Machine units are currently in operation worldwide.
Publication Name: BioCycle
Subject: Environmental services industry
ISSN: 0276-5055
Year: 1999
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Hard surface alternatives
Article Abstract:
Asphalt and concrete have become the most widely used composting pad materials in the US, but viable alternatives are now becoming available. The composting pad at Bluestem Solid Waste Agency's yard trimmings composting site in Cedar Rapids, IA, for example, is made from Ecostone, a hydrated Class C fly ash produced from coal-fired plants operated by IES Utilities Inc. A lime stabilized clay surface has been used for the composting pad at the USDA/ARS Beltsville Agricultural Research Center in Maryland.
Publication Name: BioCycle
Subject: Environmental services industry
ISSN: 0276-5055
Year: 1997
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Acceptance improves for large-scale anaerobic digestion
Article Abstract:
Anaerobic digestion is gaining increasing acceptance as a key technology to treat industrial wastewaters and organic residuals. There were about 600 vendor-supplied, low-solid anaerobic digestion systems operating or under construction worldwide as of 1996 and over 1,000 in 1997 according to the International Energy Agency. The technology is allowing waste disposal operators to achieve increasingly strict regulations in terms of providing environmental benefits.
Publication Name: BioCycle
Subject: Environmental services industry
ISSN: 0276-5055
Year: 1998
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- Abstracts: Plastics from plants, not petroleum. Meat processor moves to anaerobic digestion. Financing an anaerobic digester
- Abstracts: Classifying the supermarket food waste stream. Feasibility of large-scale organics diversion. Source sampling for waste characterization
- Abstracts: Continued growth for variable rates. Texas moves into variable rates. Variable rate initiatives at the state level
- Abstracts: Farm composting in the suburbs. Composting research targets forest products and poultry industries
- Abstracts: Recycling at the '96 Olympics. Special diversion methods for special events. Forget 3-stream sorts.... How about 10 or more?