Effects of high free ammonia concentrations on the performances of anaerobic bioreactors

Çallı, Barış; Mertoğlu, Bülent; Inanç, Bülent; Yenigün, Orhan

doi:10.1016/j.procbio.2004.05.008

Cited by 305 publications

(113 citation statements)

References 24 publications

Supporting

Mentioning

101

Contrasting

Unclassified

Order By: Relevance

“…Production of ammonium from nitrate is an ordinary reaction in anaerobic conditions as was demonstrated in equation (2) [37]. As can be seen in Table 1 [38]. In the present study, the maximum concentration of ammonium observed was 824 mg/L, which, therefore, had no negative effect on the reactor performance.…”

Section: Phase Ii: Influence Of Nitrate Addition On the Reactor Perfosupporting

confidence: 58%

Effect of adding nitrate on the performance of a multistage biofilter used for anaerobic treatment of high-strength wastewater

Ghaniyari-Benis

Borja

Bagheri

et al. 2010

Chemical Engineering Journal

View full text Add to dashboard Cite

This laboratory research was carried out to evaluate the performance of a multistage anaerobic biofilm reactor, with six compartments and a working volume of 70 L, for the treatment of a strong synthetic nitrogenous and high-strength wastewater at an operational temperature of 26ºC ± 0.5ºC. Initially, the performance of the reactor was studied when subjected to an increase in the hydraulic retention time (HRT) at a constant influent COD concentration of 10000 mg/L. Five different HRTs were studied: 0.25, 0.67, 1, 3 and 5 days, which were equivalent to 6, 16, 24, 72 and 120 hours, respectively . By increasing the HRTs from 6 h to 1 day, COD and BOD removal efficiencies were increased from 63% to 84% and from 66% to 87%, respectively. Moreover, at an HRT of 3 days, COD and BOD removal efficiencies were equal, reaching 93%. In the second phase of the research, the effect of adding nitrate with a concentration of 3000 mg/L at an influent organic loading rate of 10 g COD/L·day was researched on the reactor performance and the amount of biogas produced. Denitrification took place almost solely in the first three compartments of the reactor, with efficiencies of 85%, 95% and 98%, respectively. The nitrite produced was only detected in the first and second compartments at concentrations of 138 mg/L and 24 mg/L, respectively. In addition, no accumulation of nitrite was detected in the reactor. Furthermore, the denitrification caused an increase in the total volume of produced biogas from 102 L/d to 178 L/d.

show abstract

Section: Phase Ii: Influence Of Nitrate Addition On the Reactor Perfosupporting

confidence: 58%

Effect of adding nitrate on the performance of a multistage biofilter used for anaerobic treatment of high-strength wastewater

Ghaniyari-Benis

Borja

Bagheri

et al. 2010

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…The remarkable differences reported in ammonia inhibitive concentration could be ascribed to variations in the TAN concentrations as well as the operating parameters such as pH and temperature (Sung and Liu, 2003). Besides, the acclimatization of the seed sludge to the elevated concentrations of ammonium also has been reported to contribute to the success of methanogenesis performance (Hashimoto, 1986;Calli et al, 2005a). The adaptation of the methanogens to high concentrations of ammonium was confirmed by detecting resistant methanogens present in the seed sludge with a high concentration of ammonium (Sprott & Patel, 1986).…”

Section: Influential Parameters On Biomethane Generation In Anaerobicmentioning

confidence: 97%

“…Therefore, as a results of degradation of the organic nitrogen fraction, high concentration of total ammonium (ammonium (NH 4 + ) plus free ammonia (NH 3 ) in these waste/wastewater is common (Jokela & Rintala, 2003). Many studies have shown that free ammonia and not ammonium is responsible to inhibit the methanogenic activity during the anaerobic digestion (Sawayama et al, 2004;Sossa et al, 2004;Calli et al, 2005a;Garcia & Angenent, 2009). In a solution, the ammonia exists in a pH dependent equilibrium between ammonium ion (NH 4 + ) and unionized ammonia or free ammonia (NH 3 ) (see Equation 4).…”

Section: Ammoniamentioning

confidence: 99%

“…Earlier investigation observed that methanogens inhibition strongly occurred at a wide range of total ammonia nitrogen (TAN) concentrations; 1500-3000 mg/L at pH above 7.4 (Hashimoto, 1986); 3300-4100 mg/L at pH 8.1 and temperature 55 o C (Hansen et al, 1998); 6000 mg/L at temperature of 35 o C (Calli et al, 2005a) and 5250 mg/L at temperature of 35 o C (Garcia & Angenent, 2009). The remarkable differences reported in ammonia inhibitive concentration could be ascribed to variations in the TAN concentrations as well as the operating parameters such as pH and temperature (Sung and Liu, 2003).…”

Section: Influential Parameters On Biomethane Generation In Anaerobicmentioning

confidence: 99%

See 1 more Smart Citation

Influential Parameters on Biomethane Generation in Anaerobic Wastewater Treatment Plants

Tabatabaei¹,

Sulaiman²,

Nikbakht³

et al. 2011

Alternative Fuel

View full text Add to dashboard Cite

“…Embora, o ambiente da célula experimental tenha sido desenvolvido para apresentar características anaeróbias, durante o processo de monitoramento percebeu-se que alguns fenômenos contribuíram para entrada de ar na célula experimental, a exemplo das aberturas existentes nas laterais da célula expe-rimental, para coleta das amostras de resíduos, das fissuras existentes na camada de cobertura, além da entrada de água de chuva que traz consigo oxigênio dissolvido em sua composição. Estudos desenvolvidos por Calli et al [8] mostram que o nitrogênio amoniacal é considerado tóxico em concentrações superiores a 600 mg.L -1 . Como a concentração máxima encontrada na célula experimental é inferior àquela considerada tóxi-ca, pode-se concluir que não houve influência direta do potencial tóxico do nitrogênio amoniacal no processo de biodegradação dentro da célula experimental.…”

Section: Figuraunclassified

Avaliação do potencial tóxico dos resíduos sólidos urbanos da cidade de Campina Grande - PB

Silva¹,

Ribeiro²,

Paiva

et al. 2015

Matéria (Rio J.)

View full text Add to dashboard Cite

RESUMOA grande heterogeneidade dos Resíduos Sólidos Urbanos (RSU) faz com que estes apresentem uma composição bastante variável, podendo muitas vezes, serem comparados aos resíduos industriais por possuírem substâncias a bases de metais pesados e outros componentes tóxicos que apresentam riscos a saúde e ao meio ambiente. Assim, a busca por alternativas tecnológicas para manejo adequado dos resíduos e entendimento do seu comportamento após destinação final, tem feito com que cada vez mais estudos sejam desenvolvidos para esse fim. Exemplo disso são os estudos realizados em células experimentais, feitos com o intuito de simular o comportamento de uma célula de aterro sanitário, entendendo todas as reações que ocorrem em seu interior sob condições controladas. O objetivo desse trabalho é avaliar o potencial tóxico dos RSU da cidade de Campina Grande -PB, presentes em uma célula experimental. O experimento consistiu em uma célula experimental dotada de toda instrumentação presente em uma célula de um aterro real. O monitoramento da célula foi feito durante um período de dois anos, sendo realizada a caracterização inicial dos resíduos no dia do seu preenchimento, posteriormente amostras mensais de resíduos foram coletadas. Os resultados obtidos mostraram que os RSU foram classificados como resíduos perigosos, por conterem em sua composição elevados teores de elementos traços como: Alumínio, Manganês e Níquel. Por fim, concluiu-se que a presença desses elementos juntamente com o nitrogênio amoniacal presente nos RSU não interferiu no processo de biodegradação, no entanto contribuiu para o efeito fitotóxico dos resíduos sólidos. Palavras-chave: Fitotoxicidade, Célula experimental, Metais, Nitrogênio Amoniacal ABSTRACTThe great heterogeneity of Municipal Solid Waste (MSW) makes it presents a very variable composition and can often be compared to industrial waste substances by having the heavy metal bases and other toxic components that present risks to health and the environment . Thus, the search for alternative technologies for proper waste management and understanding of their behavior after disposal, has made more and more studies are developed for this purpose. Examples are studies in experimental cells, made in order to simulate the behavior of a landfill cell, understanding all the reactions that occur inside under controlled conditions. The aim of this study is to evaluate the toxic potential of MSW in the city of Campina Grande -PB, present in an experimental cell. The experiment consisted on the construction of an experimental cell that simulates a fullscale landfill. The monitoring of the cell was made during a period of 2 years, and held the initial characterization of the waste on the day of its completion later monthly samples of waste were collected. The results showed that the MSW were classified as hazardous waste because they contain in their composition high

show abstract

Effects of high free ammonia concentrations on the performances of anaerobic bioreactors

Cited by 305 publications

References 24 publications

Effect of adding nitrate on the performance of a multistage biofilter used for anaerobic treatment of high-strength wastewater

Effect of adding nitrate on the performance of a multistage biofilter used for anaerobic treatment of high-strength wastewater

Influential Parameters on Biomethane Generation in Anaerobic Wastewater Treatment Plants

Avaliação do potencial tóxico dos resíduos sólidos urbanos da cidade de Campina Grande - PB

Contact Info

Product

Resources

About