Sequential anaerobic–aerobic treatment for domestic wastewater – A review

Kassab, Ghada; Halalsheh, Maha; Klapwijk, A.; Fayyad, Manar; Lier, JB van

doi:10.1016/j.biortech.2009.12.039

Cited by 136 publications

(71 citation statements)

References 49 publications

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“…With discovery of more species and habitats, we anticipate that more versatile species will be identified, but their overall diversity remains relatively unknown [31]. Though surprisingly widespread, anammox bacteria discovered within each ecosystem appear to be dominated by a single anammox genus, indicating specialization for distinct ecological niches [32]. Some have speculated that up to 50% of atmospheric nitrogen is a result of widespread anammox activity [33].…”

Section: Anammox and Wastewater Treatmentmentioning

confidence: 99%

“…While considerable laboratory-scale work related to use of zeolite or anammox to remove nitrogen species from various wastewaters has provided insight into the various treatment mechanisms associated with the ion-exchange and autotrophic anammox processes, there has been little work until recently considering the combined processes, especially at the commercial domestic WWTP scale [32]. Building on the proof-of-concept benchtop-scale zeolite-anammox treatment system described by Collison and Grismer [69,71] successfully upscaled this process to remove 25-75 mg/L ammonia-N in secondary WWTP effluent to final discharge ammonia and nitrate concentrations less than 1 and 3 mg/L, respectively.…”

Section: Commercial Upscaling Of the Zeolite-anammox Wastewater Treatmentioning

confidence: 99%

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The Zeolite-Anammox Treatment Process for Nitrogen Removal from Wastewater—A Review

Grismer

Collison

2017

Water

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Water quality in San Francisco Bay has been adversely affected by nitrogen loading from wastewater treatment plants (WWTPs) discharging around the periphery of the Bay. While there is documented use of zeolites and anammox bacteria in removing ammonia and possibly nitrate during wastewater treatment, there is little information available about the combined process. Though relatively large, zeolite beds have a finite ammonium adsorption potential and require periodic re-generation depending on the wastewater nitrogen loading. Use of anammox bacteria reactors for wastewater treatment have shown that ammonium (and to some degree, nitrate) can be successfully removed from the wastewater, but the reactors require careful attention to loading rates and internal redox conditions. Generally, their application has been limited to treatment of high-ammonia strength wastewater at relatively warm temperatures. Moreover, few studies are available describing commercial or full-scale application of these reactors. We briefly review the literature considering use of zeolites or anammox bacteria in wastewater treatment to set the stage for description of an integrated zeolite-anammox process used to remove both ammonium and nitrate without substrate regeneration from mainstream WWTP effluent or anaerobic digester filtrate at ambient temperatures.

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Section: Anammox and Wastewater Treatmentmentioning

confidence: 99%

Section: Commercial Upscaling Of the Zeolite-anammox Wastewater Treatmentioning

confidence: 99%

The Zeolite-Anammox Treatment Process for Nitrogen Removal from Wastewater—A Review

Grismer

Collison

2017

Water

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“…Contudo, Chernicharo et al (2005) mostram que, quando considerados os custos de operação associados às tecnologias de tratamento investigadas (valor presente -dez anos), o custo total das unidades reacionais que constituem o sistema UASB/ FBP passa a ser substancialmente menor, principalmente em função da menor demanda energética atribuída ao sistema UASB/FBP. Considerando as principais vantagens associadas aos sistemas UASB/FBP (menor demanda energética e maior simplicidade operacional), tal tecnologia tem sido frequentemente incluída em estudos de concepção de estações de tratamento de esgoto doméstico (ETE) no contexto do Brasil, sendo tal combinação possivelmente aplicável em outros países em desenvolvimento (KASSAB et al, 2010;LETTINGA, 2010 et al,1994;WANNER et al, 1996;OAKLEY et al, 2000;RAGAS et al, 2005).…”

Section: Descrição Do Aparato Experimentalunclassified

Operação de filtros biológicos percoladores pós-reatores UASB sem a etapa de decantação secundária

Almeida

Oliveira²,

Chernicharo³

2011

Eng. Sanit. Ambient.

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ResumoA pesquisa teve por objetivo avaliar filtros biológicos percoladores (FBP) pós-reatores UASB operando sem a etapa de decantação secundária, em termos da remoção da demanda bioquímica e química de oxigênio (DBO e DQO) e sólidos suspensos totais (SST). O aparato experimental consistia em um reator UASB que alimentava quatro FBP em paralelo, preenchidos com diferentes materiais suporte. O reator UASB operou em regime hidráulico permanente, e três condições operacionais foram impostas aos FBP durante o período experimental. Em geral, os sistemas UASB/FBP foram capazes de promover o atendimento aos padrões de lançamento. Em condições de baixas cargas orgânicas volumétricas (COV), o uso de materiais de enchimento de maior área superficial específica não proporcionou ganhos expressivos em termos de desempenho. Contudo, o uso de meio suporte baseado em espumas de poliuretano propiciou melhoria significativa na qualidade do efluente final. O uso de sistemas UASB/FBP sem decantadores secundários parece ser uma promissora alternativa para a simplificação operacional da tecnologia, e uma importante estratégia para o tratamento de efluentes domésticos em países em desenvolvimento. No entanto, o sucesso do emprego desta tecnologia fica condicionado ao correto gerenciamento do lodo anaeróbio do reator UASB, a fim de que sejam evitadas sobrecargas nos FBP.Palavras-chave: esgoto doméstico; filtro biológico percolador; operação sem decantadores secundários; pós-tratamento; reator UASB. AbstractThe research aimed at evaluating the operation of trickling filters (TF) post-UASB reactors without the secondary sedimentation stage, in terms of biochemical and chemical oxygen demand (BOD and COD) and total suspended solids (TSS) removal. The experimental apparatus consisted of one UASB reactor followed by four TF in parallel, each one filled with a different packing media. The UASB reactor was operated at a permanent hydraulic regime, while three operational conditions were imposed to the TF during the experimental period. In general, the UASB/TF systems were able to comply with the discharge standards. At low organic loading rates (OLR), no improvements in terms of organic matter removal, with the use of higher surface area packing media were observed.However, the use of a sponge-based packing media provided significant improvements on final effluent quality. The use of UASB/TF systems without secondary sedimentation can constitute an attractive alternative in terms of operational simplification of this technology, and an important strategy for domestic wastewater treatment in developing countries. However, the success of this technology is strictly connected to the correct anaerobic sludge management of the UASB reactor, in order to avoid overloads on the TF.

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“…The organic matter of wastewater is degraded in the system, and produce methane gas, which will be released from the pool from the top [13]. The advantages of this system are as follow: 1) the filler provides a large surface area for the growth of the microorganisms, and the filler also increases hydraulic retention time of the wastewater; 2) the system provides a large surface area for the interaction between the wastewater and film; 3) the fact that microorganisms grow on the filler reduces the run of the degraders.…”

Section: Anaerobic Biofiltermentioning

confidence: 99%