|
|
|
|
|
| Kispergher,Eduardo M.; D'Aquino,Camila A.; Costa Junior,Luis C. da; Mello,Thiago C. de; Weinschutz,Regina; Mathias,Alvaro L.. |
| ABSTRACT: This study aimed to evaluate the effect of variations in organic load (hydraulic retention times - HRTs: from 2 to 0.5 day) and in alkalinity (NaHCO3 from 4,000 to 1,000 mg.L−1) on methane production. Biomass of sewage sludge was inoculated and stabilized on 1" polypropylene rings. The rings were immersed in the liquid phase (8.41 L) of an upflow anaerobic filter reactor (12.22 L). A solution of 5 g of whole milk powder per liter was used to simulate effluent from the dairy industry. Process effectiveness was measured by chemical oxygen demand reduction, biogas production, and biogas methane content. Biogas production started at a 2-day HRT and synthetic effluent alkalinization with 4,000 mg.L−1 NaHCO3. The best operation condition was at 1-day... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy industry; Biofilter; Hydraulic retention time; Alkalinity; Biogas. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000400820 |
| |
|
| |
|
| |
|
|
| Jordan,Rodrigo A.; Geisenhoff,Luciano O.; Oliveira,Fabricio C. de; Santos,Rodrigo C.; Martins,Elton A. S.. |
| ABSTRACT In the aquaponic system, the characteristics of the materials used as substrate directly affect plant development, because besides acting as a support base, they must present a surface to fix microorganisms, responsible for the conversion of nutrients into forms more easily available to plants. Thus, the objective of this study was to evaluate the effect of four growing substrates on the yield of lettuce grown in aquaponic system. The experimental design was randomized blocks with four treatments, which corresponded to the substrates, and six replicates. Plants were grown using the nutrient film technique (NFT) system. The substrates used in the experiment were: coconut shell fiber with crushed stone #3, expanded vermiculite, zeolite and phenolic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofilter; Biodigestion; Soilless cultivation; Intensive fish farming. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000100027 |
| |
|
|
|
