A method for retaining ammonia nitrogen and removing antibiotics in biological treatment of livestock wastewater is provided. A nitrification inhibitor is added into an aerobic bioreactor with a sludge age greater than or equal to 30 days to inhibit the activity of nitrifying bacteria. The nitrification inhibitor is preferably 2-chloro-6-(trichloromethyl)pyridine or allylthiourea. By adding a chemical agent capable of inhibiting the activity of nitrifying bacteria into the aerobic biological treatment unit for treating livestock and poultry farming wastewater, the occurrence of ammonia nitrogen nitrification is inhibited without sacrificing the degradation of COD and antibiotics by heterotrophic bacteria, so that the aims of retaining ammonia nitrogen while removing antibiotics are realized.

Implementations of a non-polluting biomass processor, and manufactured processor components are disclosed which at least partly address the local technical problems of a municipality, business, and/or organization, to generate non-polluting emissions, while generating at least one, often two or more, product outputs from biomass feedstocks input into the biomass processor. Examples of the operations of the biomass processor and various combinations of its manufactured processor components are disclosed. The product outputs may include carbon char and/or activated carbon, both of which may be used to increase water retention in climates with hot, dry summers and/or used to remediate water pollution in water reservoirs.