In covered lagoons, which are less efficient than fixed-film anaerobic digesters, the digestive bacteria float around, making only random contact with the manure particles. In fixed-film digesters, the bacterial growth occurs on the surfaces of the internal media that the waste must flow over, thereby assuring frequent contact. In this way, higher volumes of wastewater can be processed.

The key to our waste management system is a natural biological process called anaerobic digestion that relies on microorganisms to transform animal manure into methane gas. Anaerobic digesters, which process waste under oxygen-free conditions, are different than conventional aerobic systems that use oxygen to treat the waste.

It's an environmentally friendly solution for an unpleasant housekeeping task. It's not often that one technology can solve several major problems, but our innovative animal manure management system is a sustainable option for dairies and other livestock operations that produces renewable energy and protects the environment.

Tibby sat on the outside of a group of kids in the film program. There was a lot of dark clothing and heavy footwear, and quite a few piercings glinting in sunlight. They had invited her to sit with them while they all finished up their lunches before film seminar. Tibby knew that they had invited her largely because she had a ring in her nose. This bugged her almost as much as when people excluded her because she had a ring in her nose.

I'm a gigantic musical film fan.

The evening advanced. The shadows lengthened. The waters of the lake grew pitchy black. The gliding of the ghostly swans became rare and more rare.