NOVELTY - Method for treating animal effluent, involves (a) subjecting the animal effluent to conditions under which at least partial aerobic digestion of the animal effluent is effected, (b) maintaining the partially aerobic microbe digested solids under anaerobic conditions, and sealing the semi-composted manures, (c) dispersing the solid digestate produced in the step (a) in an aqueous medium, (d) aerating the aqueous dispersion of the step (b) in the presence of soluble silica and/or germanium, and (e) separating solids and liquids from the aerated aqueous dispersion.    USE - The method, apparatus or system is useful for treating animal effluent (all claimed) to produce compost-like solid product and liquid fertilizer. The microbial digested liquid is also used as environmental remediation agent for solid, liquid or gas treatment. The animal effluent includes human and animal manures, poultry and fish processing wastes, scallop processing residues, algae, and abattoir effluent.    ADVANTAGE - The method is cost-effective, enhances fixation of nitrogen and sulfur in the solid digestate in the form of ammonia, nitrates and sulfonates rather than being released as noxious gases which contribute to greenhouse gas emissions and thus protects environment from hazardous nitrates and sulfonates, produces fertilizer having the properties of high electron donation with redox potential of -100 mV to -1000 mV, electrical conductivity of 5-100 mS/cm, negatively active reactive sites and solid compost-like byproduct, and improves plant growth by providing nutrients to plant.    DETAILED DESCRIPTION - Method for treating animal effluent, involves (a) subjecting the animal effluent to conditions under which at least partial aerobic digestion of the animal effluent is effected, (b) maintaining the partially aerobic microbe digested solids under anaerobic conditions to maintain ammonia, sugar and saccharide levels formed at the peak of microbe activity in the solid phase, and sealing the semi-composted manures, where the sealing semi-composted manures at this point is vital for the successful aerobic liquid microbe digestion stage to follow, (c) dispersing the solid digestate produced in the step (a) in an aqueous medium, (d) aerating the aqueous dispersion of the step (b) in the presence of soluble silica and/or germanium, and (e) separating solids and liquids from the aerated aqueous dispersion. INDEPENDENT CLAIMS are included for the following:    (1) apparatus comprising a vessel for containing an aqueous dispersion of solid digestate, where the solid digestate is produced by at least partially aerobically digesting the animal effluent, the vessel has several inlets for receiving aerating medium, and discharge outlet for discharging the aerated aqueous dispersion; and    (2) system comprising (a) source of animal effluent, (b) aerobic digester for at least partially aerobically digesting the animal effluent, (c) vessel for containing aqueous dispersion of the solid digestate, where the solid digestate is produced by at least partially aerobically digesting the animal effluent in the aerobic digester, the vessel has several inlets for receiving aerating medium, and discharge outlet for discharging the aerated aqueous dispersion, (d) separator in fluid communication with the discharge outlet, where the separator is arranged, in use, to separate solids from liquids in the aerated aqueous dispersion, and (e) first and second conveyors to transfer the animal effluent from the source of the animal effluent to the aerobic digester, and to transfer the digestate from the aerobic digester to the vessel, respectively.