TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The microalgae is green alga or chrysophyceae, diatom, blue algae, red alga in the fresh water microalgae, Chlorella pyrenoidosa, Scenedesmus obliquus and/or spirulina containing high protein. The flocculant is microbial flocculant or natural macromolecule flocculant harmless to animals, and can be chitosan flocculant. The bacterial strain is Lactobacillus, Candida utilis, and/or Bacillus.. The complex enzyme is cellulase, protease and/or lipase.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The disinfectant is sodium hypochlorite or ozone or chlorine dioxide or ultraviolet rays. The neutralizer is sodium thiosulfate.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Method: The anaerobic biochemical reactor uses a general anaerobic digestion tank, an upflow anaerobic sludge blanket (UASB) reactor, an internal circulation anaerobic reactor, an expansion granular sludge blanket reactor, an external circulation anaerobic reactor, an upflow anaerobic solid reactor, an anaerobic baffle reactor, an upflow anaerobic sludge blanket/filter layer reactor, an anaerobic biofilter (AF), an anaerobic composite reactor, an anaerobic sequence batch reactor, an anaerobic expansion bed reactor, an anaerobic fluidized bed reactor, an anaerobic rush streaming fixed bed reactor, an anaerobic biological turnplate, an anaerobic upflow fluidized bed reactor, an anaerobic compound bed reactor (AF+UASB) and/or a vertical baffling anaerobic sludge blanket reactor. The anaerobic biochemical reactor is an activated sludge aeration tank, an aeration biofilter, an aerobic biofilter, a biological contact oxidization pool, an oxidization groove, an oxidization pond, a cyclic activated sludge system (CASS) aerobic biochemical pool, a sequencing batch reactor (SBR) reaction pool, an aerobic bio-fluidized bed, a filter bed and/or an aerobic biological turnplate. The membrane bioreactor can be a macromolecule membrane bioreactor and/or a ceramic membrane bioreactor. The photobioreactor can be a pipeline type photobioreactor, a flat plate type photobioreactor, a columnar airlift photobioreactor, an upright punching bag, and/or a closed annular shallow pool.