Nutrient discharge, sludge quantity and characteristics in biofloc shrimp culture using two methods of carbohydrate fertilization

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dc.citation.volume76
dc.contributor.authorArantes, Rafael
dc.contributor.authorSchveitzer, Rodrigo [UNIFESP]
dc.contributor.authorSeiffert, Walter Quadros
dc.contributor.authorLapa, Katt Regina
dc.contributor.authorVinatea, Luis
dc.coverageOxford
dc.date.accessioned2020-07-31T12:46:49Z
dc.date.available2020-07-31T12:46:49Z
dc.date.issued2017
dc.description.abstractThe aim of this study was to evaluate the effect of two methodologies of carbohydrate fertilization on the volume and characteristics of effluent from intensive biofloc shrimp cultivation. Six fiberglass circular tanks (50 m(2) each) were divided into two treatments. In the treatment called continuous (CONT), the tanks received daily molasses fertilization throughout the entire rearing period. In the treatment named initial (INI), molasses was used only in the early weeks of cultivation. Juvenile Litopenaeus vannamei (0.87 +/- 0.10 g) were stocked at a density of 180 animals m(-2) and cultured during 12 weeks until they reached an average weight of 12 g. The tanks were operated with no water exchange and the total suspended solids concentration were kept between 300 and 400 mg L-1 using settling chambers. The sludge produced and the wastewater at harvest were quantified and their characteristics were determined. The production of TSS in the CONT treatment was higher (0.25 kg of solids per kg of applied feed) than in the INI treatment (0.16 kg kg(-1)) (P< 0.05). The analysis of the sludge revealed a high amount of volatile solids in both treatments, between 636 and 702 g kg(-1). However, due to the elevated sludge nitrogen content, the carbon to nitrogen (C:N) ratio was low, with values of 6.4 +/- 1.4 and 7.5 +/- 1.6 for INI and CONT respectively. The BOD:TSS ratio was also low in both treatments, but the INI showed lower values (10.3 +/- 0.6%) than the CONT (14.9 +/- 0.0%) (P<0.05). Both fertilization strategies were able to modify the characteristics of sludge produced during cultivation. Moreover, the high nitrogen and sulfate content of the sludge in both treatments indicated that it may be difficult to use an anaerobic digestion process to treat sludge. In the INI treatment tanks, the sludge is partially stabilized, while in the CONT there was a greater need for stabilization. (C) 2016 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Fed Santa Catarina, Dept Aquaculture, Lab Camaroes Marinhos, BR-88062601 Florianopolis, SC, Brazil
dc.description.affiliationFed Univ Sclo Paulo, UNIFESP, Dept Marine Sci, Ave Saldanha da Gama 89, BR-11030400 Santos, SP, Brazil
dc.description.affiliationUnifespDepartmentof Marine Sciences, Universidade Federal de São Paulo (UNIFESP), Avenida Saldanha da Gama, 89, Ponta da Praia, Santos, São Paulo CEP 11030-400, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipLaboratorio de Camaroes Marinhos (LCM-UFSC)
dc.description.sponsorshipIDCAPES: 09/2009
dc.format.extent1-8
dc.identifierhttp://dx.doi.org/10.1016/j.aquaeng.2016.11.002
dc.identifier.citationAquacultural Engineering. Oxford, v. 76, p. 1-8, 2017.
dc.identifier.doi10.1016/j.aquaeng.2016.11.002
dc.identifier.issn0144-8609
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/56380
dc.identifier.wosWOS:000395219500001
dc.language.isoeng
dc.publisherElsevier Sci Ltd
dc.relation.ispartofAquacultural Engineering
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectBFTen
dc.subjectLitopenaeus vannameien
dc.subjectEffluenten
dc.subjectSludgeen
dc.subjectWater useen
dc.titleNutrient discharge, sludge quantity and characteristics in biofloc shrimp culture using two methods of carbohydrate fertilizationen
dc.typeinfo:eu-repo/semantics/article
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