NOVELTY - Manure and liquid rinse water are added together into a digester, fermented with biogas, to obtain slurry. The slurry is solid-liquid separated to obtain solid residue and supernatant. The supernatant is filtered and the pH is adjusted to alkaline. Liquid ammonia is blown into the alkaline supernatant, and liquid fertilizer is absorbed and fermented to obtain liquid organic fertilizer. The pH of the supernatant is adjusted to neutral, filtered and concentrated. The concentrate is fermented and filter-pressed to obtain organic fertilizer.    USE - Recycling of water-submerged manure in breeding industry to produce organic fertilizer used for agriculture.    ADVANTAGE - The water-submerged manure containing manure and washing water in the breeding industry, and the sludge and the biogas slurry from biogas preparation are converted into organic fertilizer and liquid organic fertilizer, by the recycling process, thus contributing to zero discharge of waste water in farm. The recycling method contributes to energy-saving and is environmentally-friendly, and economically provides high quality fertilizer.    DETAILED DESCRIPTION - Manure and liquid rinse water are added together into a digester, fermented with biogas, to obtain slurry. The slurry is solid-liquid separated to obtain solid residue and supernatant. The supernatant is filtered and the pH is adjusted to alkaline. Liquid ammonia is blown into the alkaline supernatant in an aeration tank, and acid liquid fertilizer is absorbed and transferred to fermentation tank. The liquid fertilizer is fermented to obtain liquid organic fertilizer. The pH of the supernatant is adjusted to neutral, and pumped to activated charcoal canister, filtered through activated carbon to reduce the oxidation-reduction potential of the supernatant. The redox potential of the supernatant is pumped to the reverse osmosis filtration system, concentrated. The concentrate is supplied to fermentation tank, fermented and sterilized. The sludge produced is filter-pressed and fermented to obtain organic fertilizer.