Every day we urinate nutrients that could be used as fertilizer for plants, which in turn could be used to make beautiful landscapes, food, fuel, and fibre. Instead, these nutrients are flushed away, either to be treated at high cost or discharged to waters where they pollute and choke off aquatic life.
Liquid Gold - The Lore and Logic of Using Urine to Grow Plants tells you how urine - which contains most of the nutrients in domestic wastewater and usually carries no disease risk - can be utilized as a resource. Starting with a short history of urine use - from ritual to medicinal, to even culinary - and a look at some unexpected urinals, Liquid Gold shows how urine is used worldwide to grow food and plants, while protecting the environment, saving its users the cost of fertilizer, and reconnecting people to the land and the nutrient cycles that sustain them.
Acknowledgements. Introduction A Golden Opportunity!: A Resource in the Wrong Place Pollutes; From Pollutant to Fertilizer; Safe to Use; An Age-Old Practice Enters Modern Bathrooms; Reducing Wastewater Treatment Costs; Closer to Home. Urine Lore Urine Use Through History: Urine Conveniences; Urine to Dye for; Urine Cleaners; Culinary Urine; Urine Good Health; Urine in Wartime; Urine Customs; Ritual Urine; Utilitarian Urine; Urine in Popular Culture. Urine Therapy: Hormonal Value; Homeopathic Power; Anticlotting Properties; Antibacterial Agent. Unexpected Urinals: Uncommon and Curious Urinals Urinal Entertainment; Urinal as Art; Urinals for Women; Artful Urinals; Circumstantial Urinals; Activist Urinal; Misplaced Urinals; Double-Duty Urinal. Science and Technology of Using Liquid Gold Why Manage Urine Separately?; The City as Fertilizer Factory; How to Use Urine Safely - Compost It; Combine It with Greywater in an Aerobic Garden Bed; Dilute It and Apply It Directly to Plants; Other Possibilities. How to Keep Urine Separate - Urinals; Urine-Diverting Flush Toilets; Waterless Urine-Diverting Toilets; Urine Diverters; More Urine Diverters; Sources. Gold to Green: Profiles of Liquid Gold at Work in Gardens and Farms Worldwide Farming with Liquid Gold in Sweden; Keeping the Lake Clean Outside Stockholm; Liquid Gold on Martha's Vineyard; Gardeners' Toilets in Denmark; Liquid Gold in the City; Liquid Gold on a Small Farm; Liquid Gold at Work in Wales; Liquid Gold on the Roof; Liquid Gold on the Lawn; Urine Diverting Toilets in Mexico - Fertilizing Avocados and Nopal. Liquid Gold at the Office - Adventures in Urine Diversion. Frequently Asked Questions. References.
Carol Steinfeld is a writer, researcher and resource-recycling specialist writing about ecological resource management solutions. She is co-author of The Composting Toilet System Book and Reusing the Resource: Adventures in Ecological Wastewater Recycling.