Sulphate removal from industrial wastewater using a packed-bed anaerobic reactor

Silva, Ariovaldo José da; Varesche, Maria Bernadete Amâncio; Foresti, Eugênio; Zaiat, Marcelo

doi:10.1016/s0032-9592(01)00297-7

Cited by 150 publications

(69 citation statements)

References 7 publications

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“…Wastewater containing sulfate is normally treated with physicochemical and biological methods. However, for physicochemical methods, the underlying disadvantages limited their applications, such as separation and appropriate disposal of the solid phase, high cost and energy consumption (Silva et al 2002). For biological methods, sulfate-rich wastewater was generally treated by anaerobic process (Nusara et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Performance and granulation in an upflow anaerobic sludge blanket (UASB) reactor treating saline sulfate wastewater

et al. 2013

Biodegradation

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An upflow anaerobic sludge blanket reactor was employed to treat saline sulfate wastewater. Mesophilic operation (35 ± 0.5°C) was performed with hydraulic retention time fixed at 16 h. When the salinity was 28 g L -1 , the chemical oxygen demand and sulfate removal efficiencies were 52 and 67 %, respectively. The salinity effect on sulfate removal was less than that on organics removal. The methane productions were 887 and 329 cm 3 L -1 corresponding to the NaCl concentrations of 12 and 28 g L -1 , respectively. High salinity could stimulate microbes to produce more extracellular polymeric substances (EPSs) and granulation could be performed better. Besides, with the high saline surroundings, a great deal of Na ? compressed the colloidal electrical doublelayer, neutralized the negative charge of the sludge particles and decreased their electrostatic repulsion.The repulsion barrier disappeared and coagulation took place. The maximum size of granules was 5 mm, which resulted from the coupled triggering forces of high EPSs and Na ? contents. Sulfate-reducing bacteria (SRB) were dominant in the high saline surroundings while the methane-producing archaea dominated in the low saline surroundings. The SRB were affected least by the salinity.

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Section: Introductionmentioning

confidence: 99%

Performance and granulation in an upflow anaerobic sludge blanket (UASB) reactor treating saline sulfate wastewater

et al. 2013

Biodegradation

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“…The balance of natural sulfur cycle could be interfered by high sulfate concentrations resulting in the release of toxic sulfides [2,3]. At the same time, sulfides bring potential damage to the environment, such as odor, corrosion [4,5].…”

Section: Introductionmentioning

confidence: 99%

S115 Characteristics of Sulfate Reduction–Ammonia Oxidation under Anaerobic Conditions

YUAN¹,

HUANG²,

LI³

et al. 2015

JRST

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ABSTRACT:The sulfate reduction-ammonia oxidation reaction with ANAMMOX sludge at autotrophic condition was investigated. It was found that the pH level decreased, and elemental sulfur and dinitrogen were produced at the end of this process, while NO 3 --N was a byproduct. A lower ratio of n(N) to n(S) can improve SO 4 2--S conversion ratio where a larger portion of NH 4 + -N was oxidized into NO 3 --N, resulting in a decreased removal ratio of n(TN)/n(TS). This indicates that ammonia can be oxidized into NO 2 --N or NO 3 --N by sulfate, then the residual NH 4 + -N and the produced NO 2 --N would be removed via ANAMMOX.

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“…Processos de precipitação química resultam em grande quantidade de resíduos sólidos devido à quantidade de reagente a ser empregada. Esses resíduos devem ser adequadamente dispostos, incorporando custos para classificação, manuseio e destinação (SILVA et al, 2002).…”

Section: Introductionunclassified

Aplicação De Reatores Anaeróbios Operados Em Bateladas Sequenciais Com Filme Fixo No Tratamento De Água Residuaria Industrial Rica Em Sulfato

Sarti

Foresti

2009

RHE

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RESUMOEste trabalho apresenta e discute o potencial de uso de reatores anaeróbios operados em bateladas seqüenciais com biomassa imobilizada (ASBBR), em escala piloto, no tratamento de água residuária industrial contendo elevadas concentrações de sulfato. No ASBBR, com volume total de 1,2 m 3 , preenchido com carvão mineral (meio suporte) foram aplicadas cargas de sulfato de 0,15 a 1,90 kg/ciclo com duração de ciclo de 48 h, correspondendo, respectivamente, às concentrações de sulfato no afluente de 0,25 a 3,0 g.L -1 . O esgoto sanitário e etanol foram usados como doadores de elétrons para a redução do sulfato. As eficiências médias na redução de sulfato ficaram entre 88 e 92% nos 92 ciclos operacionais. Como pós-tratamento dos efluentes gerados pela redução de sulfato empregou-se outro reator ASBBR com volume total de 385,0 L e mesmo meio suporte para imobilização da biomassa, mas com diferente granulometria. A remoção média de DQO (valor médio afluente: 1450 mg.L -1 ) foi de 88%, enquanto as concentrações de sulfetos totais (H 2 S, HS − , S 2− )

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Sulphate removal from industrial wastewater using a packed-bed anaerobic reactor

Cited by 150 publications

References 7 publications

Performance and granulation in an upflow anaerobic sludge blanket (UASB) reactor treating saline sulfate wastewater

Performance and granulation in an upflow anaerobic sludge blanket (UASB) reactor treating saline sulfate wastewater

S115 Characteristics of Sulfate Reduction–Ammonia Oxidation under Anaerobic Conditions

Aplicação De Reatores Anaeróbios Operados Em Bateladas Sequenciais Com Filme Fixo No Tratamento De Água Residuaria Industrial Rica Em Sulfato

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