Use of magnesium hydroxide and calcium compounds with and without a carrier medium to treat animal waste: to reduce air emissions (including ammonia volatilization) from, retain nutrients from, and manage phosphorous solubility of decaying animal litter, manure, and animal excretions and waste in CAFOs and animal enclousures; to reduce farm nutrient runoff; to extract and bind waste nutrients for fertilizer use; and to reduce air emission of waste-based fertilizers and animal bedding

摘要

A method for treating CAFO animal litter, manure and waste, reducing volatilization, retaining nitrogen and phosphorous, and reducing soluble phosphorus levels in litter, manure-based compost, and manure-based fertilizers. The method adds magnesium hydroxide (and calcium carbonate or calcium compounds) with or without a carrier medium to animal litter, compost, manure, and manure-based fertilizers as well as pet and zoo animal bedding material to maintain the litter pH at values inhibiting ammonia and hydrogen sulfide volatilization. Calcium compounds added to the litter and waste reduce soluble phosphorus runoff from fields receiving the resulting litter, fertilizer or lagoon water. Application of magnesium hydroxide and calcium compounds in CAFO waste, washwaters and lagoons precipitates a compound recoverable as fertilizer material. The method is effective in poultry, hog, and dairy CAFOs, animal care facilities, pet and zoo enclosures, pastures, agricultural fields, manure storage piles, animal waste treatment, manure-based fertilizer manufacture, and manure-based fertilizer products.