Abstract
Soil chemical attributes and initial growth of corn crop by adding domestic and industrial sewage sludge
Highlights
In the various types of wastewater treatment systems a semi-solid residue, in the form of a slurry, and with a predominantly organic nature occurs called sewage sludge
Thomaz et al (2012) observed a significant response in the dry mass yield in the sunflower crop with increasing sewage sludge doses. This consolidates the results found, since the dry mass of the aerial part, expresses success in crop development and its tendency to achieve a good grain yield
Positive linear increases occur in soil pH and phosphorus content with increasing doses of domestic and industrial sewage sludge
Summary
In the various types of wastewater treatment systems a semi-solid residue, in the form of a slurry, and with a predominantly organic nature occurs called sewage sludge. The use of sewage sludge in agriculture is still very questionable, due to the damage it can cause to human health and the natural environment, besides financial losses if it is incorrectly used (BONINI et al, 2015). A feasible technical alternative to the reuse of organic wastes is their use as organic fertilizer, provided that no heavy metals, pathogens and toxic components are present. For the use of sewage sludge, the reuse technique of this compound and its derivatives is the only one that follows Brazilian legislation defined by CONAMA no 375/2006. Specific to sewage sludge, the effluent may be classified under some rule of this legislation
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