First of all, the background is that solid waste is now a hot field of environmental engineering, and it is also a major trend in the development of the whole environmental protection field; Next, answer the landlord's question: as far as Nanjing universities are concerned, the best solid waste is undoubtedly Nanda; First, although Nantah is comparable to Southeast University in engineering, its tutors are excellent and its laboratories are advanced. Second, the reputation is big enough and the employment has advantages. In short, Nantah is the first choice for solid waste, followed by Southeast University. Hohai University has the best water treatment in Nanjing, but solid waste can also be considered.