| With the improvements of social material and cultural level,people have paid more attention to animal welfare.Urban short-term travel industry is booming and progressive.Zoos attract a large number of urban residents with their rich tourism content,they gradually become an important node of tourism construction.The traditional zoos are changing to the wild animal parks.By now,China has built morethan30 large-scale comprehensive wildlife parks.The wildlife parks own more space and more species animals.With the expansion of scale and the number of animals,zoos produce more and more dung and garbage.There are a lot of livestock and poultry wastes in our country.But the utilization level of fecal pollution is low.The waste causes a serious of environment pollution especially in agricultural field.At present,although there are many techniques of waste disposal and comprehensive utilization,there is no mature model for the dung disposal and utilization of manure in zoos.However,the zoos have not paid enough attention to the utilization of animal manure.The thesis is fully studied about the manure production of the Dalian forest zoo through lasting investigation of the zoo.It references to a large number of articles on the utilization of dung and gives a workable model of animal waste disposal and utilization according to compare the applicable conditions of different models.In theory,the models of aerobic composting and biogas fermentation are both suitable for animal waste disposal.However,from the practical application,it is not advisable to invest blindly because of the high investment cost of the biogas fermentation mode and the secondary pollution.The aerobic composting model has the advantages of relatively low investment cost and simple production process.And it is managed by scientific planning,which can have a good effect on the resource utilization of manure.The utilization of zoo manure not only has certain economic benefits,but also has good social and ecological benefits. |
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