Data/hora: 05/06/2024 08:06:45

Biblioteca(s): | Embrapa Suínos e Aves.
Data corrente: | 22/11/2019
Data da última atualização: | 22/11/2019
Autoria: | CHINI, A.; BOLSAN, A. C.; HOLLAS, C. E.; ANTES, F. G.; FONGARO, G.; TREICHEL, H.; KUNZ, A.
Afiliação: | ANGELICA CHINI, UNIOESTE/Cascavel; ALICE CHIAPETTI BOLSAN, UNOESC/Joaçaba; CAMILA ESTER HOLLAS, UNIOESTE/Cascavel; FABIANE GOLDSCHMIDT ANTES, CNPSA; GISLAINE FONGARO, UFSC; HELEN TREICHEL, UFFS/Erechim; AIRTON KUNZ, CNPSA.
Título: | Evaluation of deammonification reactor performance and microrganisms community during treatment of digestate from swine sludge CSTR biodigester.
Ano de publicação: | 2019
Fonte/Imprenta: | Journal of Environmental Management, v. 246, p. 19-26, 2019.
DOI: | 10.1016/j.jenvman.2019.05.113
Idioma: | Inglês
Conteúdo: | Abstract: Digestate from anaerobic processes still contains relatively high amount of total organic carbon (TOC) that can inhibit deammonification. In this sense, the present study investigated the interference of TOC in a lab-scale expanded granular sludge bed (EGSB) deammonification reactor treating digestate from a continuous stirred tank reactor (CSTR) swine sludge biodigester. Additionally, the microorganisms community was analyzed when the process was submitted to different operational conditions. The study was divided into three phases according to the C/N ratio (0, 0.5 and 1 for phase I, phase II and phase III, respectively). At phase I the average nitrogen removal efficiency (NRE) was 65 ± 1.6%. With the increase of TOC in phase II (156 ± 8.15 mg L &#8722;1) the average NRE was 61 ± 9.8% which is statically equivalent to phase I (p < 0.05). On the other hand, at phase III (TOC was increased to 255 ± 3.50 mg L &#8722;1) the NRE decreased to 50 ± 3.9% which was 22% lower than in phase II. Stoichiometric coefficients of N 2 was close to theoretical values during all experimental phases, while stoichiometric coefficient of N-NO 3-was lower than theoretical values specially during phase III. Ca. Jettenia was favored when the reactor was fed with digestate although its proportion decreased in phase III. Thus, at the conditions employed in the present study it is recommended to use a C/N ratio of 0.5 (TOC concentration around 156 mg L &#8722;1) to treat digestate by deammonification process, in order to not diminish anammox microorganisms abundance. Thereby, the microorganisms community can be modulated based on carbon and nitrogen loading rates of a deammonification reactor for swine manure treatment purpose.
Palavras-Chave: | Anammox; Biodigesters; Carbono orgânico; Nitrogen removal; Organic carbon; Tratamento de efluentes.
Thesagro: | Biodigestor; Dejeto; Nitrogênio; Suíno.
Thesaurus Nal: | Wastewater treatment.
Categoria do assunto: | --
Registro original: | Embrapa Suínos e Aves (CNPSA)
Exemplares: | CNPSA - (21737-1) - UPC - AP - DD -  -  -  - DIS