The sewage mixed wastewater from pulp industry with domestic sewage is treated deeply by two different process including process of hydrolytic acidification and CAST and coagulate precipitation and complex filter tank as well as process of facultative pond and contact oxidation and coagulate precipitation and complex filter tank.

Study on packing biofilm and process conditions of hydrogen sulfide and ammonia removal by composite biofilter;

Study on deodorization of municipal solid wastes by a composite biofilter;

The composite biofilter process(a combination of biotrickling filter and biofilter),taking clinoptilolite and wood chip as the media,was applied to treat the mixed odors(H_2S and NH_3).

Study on hydrogen sulfide and ammonia odors treatment by the combined bio-filter;

In this paper,it has been reported technique to treat the odors mixed with H_2S and NH_3 by use of a novel combined bio-filter,witch is a patent in which biofilter is combined with a bio-trickling and a bio-filtering pond.

Multiple Layer Microbial-Earthworm Eco-filter System (MMEEF) with combination of microbe and earthworm is a representative of micro-fauna to form artificial ecosystem and is a new wastewater treatment technique to degrade pollutants for sewage treatment.