The November/December of Hydro magazine is online. The special coverage “Odor treatment in ETEs”, on page 18, brings some solutions capable of containing or neutralizing the gases effects. The pressures to control the emission of bad odors in industries and effluent treatment stations grow every day. See on page 48 the article “Optimized operation of sewage collection system”, showing that the operation of sewage collection systems can present several problems throughout its life. But it is possible to identify these risks during periodic inspections of the network and program infrastructure rehabilitation and clearing with greater precision and assertiveness. Furthermore, on page 56, the article “BIM library for water tanks construction”, where it is shown that, despite the adoption of the BIM - Building Information Modeling methodology involve the reorganization of the company's productive structure, the challenge is the generation and cataloging of information, creating a library for be used in the modeling of construction projects. This issue also brings the update “Water and wastewater treatment plants” buyers’ guide, and “Hydraulic products and equipment distributors” directory.