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Analyse the procces of Biodrying to anaerobic sludge

Grant number: 16/12981-4
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): September 01, 2016
Effective date (End): August 31, 2017
Field of knowledge:Engineering - Sanitary Engineering - Environmental Sanitation
Principal Investigator:Cali Laguna Achon
Grantee:Tayná Barros Mazer Lucatti
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

In the wastewater treatment process are generated residues, such as sludge. The sludge must be treated and disposed in an environmentally appropriat. Sludge treatment systems consist in the removal of water through the dewatering and drying. The sludge is an organic residue and One alternative treatment for sewage sludge is biodrying. The biodrying is a process that reduces moisture from the sludge by heating produced from the microbial activity. Among the factors that influence the biodrying process are the initial moisture content, air flow rate in the reactor inlet, the mix and the revolving mass. Thus, the present study aims to evaluate the biodrying in different proportions of mixture of dewatered sludge and anaerobic structural material, paying attention to the evolution of total solids and moisture content. To compose the biodrying system were built two reactors in stainless steel plates with insulation of walls, bottom and cover in refractory material, which is fully fenced, preventing the loss of temperature and steam (hot air), to carry out tests with three different mixtures between mud and structural material. The structural material to be used are wood chips, which are added to the sludge in percentage of 3%, 5% and 10% by weight. Nevertheless, during the test the temperature is monitored inside the automated reactor, keeping constant air flow rate at the reactor inlet during the test period. The tilling of the mixture is held every four days, homogenizing and collecting samples for determination of total solids content.