It is recognised that sewage is just not a pollutant but also a potential source of various nutrients as evidenced by the presence of valuable nutrients. Models of aquaculture for treatment of domestic sewage are available, the principle of all models are mainly dilution, oxidation and reduction of suspended solids along with recovery of nutrients in terms of biomass. The book is a compendium of information available on various aspects like sewage and its nature, ...
The lucidly written text combines both the taxonomy and biology of parasitic Hymenoptera along with their use in biological control of insect pests. The book has a biosystematic approach and stresses on the potential use of these parasitoids against insect pests. Written in an easily understandable style the author has successfully attempted the different aspects of biosystematics of parasitic Hymenoptera which would be of great interest not only to students of ...