Fate of wastewater organic pollution during activated sludge treatment: nature of residual organic matter

Dignac, Marie-France; Ginestet, P.; Rybacki, Danielle; Bruchet, A.; Urbain, V.; Scribe, P.

doi:10.1016/s0043-1354(00)00195-0

Cited by 213 publications

(138 citation statements)

References 19 publications

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“…The efficiency of a biological process to remove organic matter also depends on these conditions because past substrates influence future functional properties of microorganisms [19]. Since lipids/fatty acids are one of the major components of SMP found in biological wastewater effluents [8,21,59,61,90], another promising approach to enhance their biological removal from wastewater is the control of the accumulation of SMP, which is one of the possible causes of bioreactor failures and loss of biomass activity reported in the literature. Therefore, this approach is advantageous because it stabilizes not only the microbial community but also the biodegradation process [18,19].…”

Section: Discussionmentioning

confidence: 99%

“…The substrate utilization rate of myristic acid was similar to that of unsaturated fatty acids. The low substrate utilization rates of longchain fatty acids are expected because such fatty acids are also reported to pass through biological wastewater treatment systems and are found in treated wastewater effluents [21,70]. Peil and Gaudy [66] determined substrate utilization rates of various substrates including sugars and amino acids under similar experimental conditions as reported by Novak and Klaus [64].…”

Section: Comparison Of Biodegradability Of Different Lipidsmentioning

confidence: 99%

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Behavior of lipids in biological wastewater treatment processes

Chipasa

Mędrzycka

2006

J IND MICROBIOL BIOTECHNOL

132

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Lipids (characterized as oils, greases, fats and long-chain fatty acids) are important organic components of wastewater. Their amount, for example, in municipal wastewater is approximately 30-40% of the total chemical oxygen demand. The concern over the behavior of lipids in biological treatment systems has led to many studies, which have evaluated their removal, but still the exact behavior of lipids in these processes is not well understood. In this review, we discuss the current knowledge of how lipids/fatty acids affect both aerobic and anaerobic processes and specific methods that have been used in an attempt to enhance their removal from wastewater. Overall, the literature shows that lipids/fatty acids are readily removed by biological treatment methods, inhibitory to microbial growth as well as the cause of foaming, growth of filamentous bacteria and floc flotation.

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Section: Discussionmentioning

confidence: 99%

Section: Comparison Of Biodegradability Of Different Lipidsmentioning

confidence: 99%

Behavior of lipids in biological wastewater treatment processes

Chipasa

Mędrzycka

2006

J IND MICROBIOL BIOTECHNOL

132

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“…Para os lodos de reator anaeróbio os valores de fenóis estiveram entre 0,03 e 0,04%, e de taninos entre 0,01 e 0,02%. Segundo Dignac et al (2000), os fenóis podem ter duas origens: (i) degradação de proteínas; e (ii) degradação de compostos polifenólicos. Neste caso, a menor participação de compostos protéicos nos lodos de lagoa pode ter originado os fenóis encontrados em LLP e CL.…”

Section: Compostos Orgânicosunclassified

Composição química da matéria orgânica de lodos de esgoto

Carvalho

Ribeirinho

Andrade

et al. 2015

Agraria

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RESUMOLodos de esgoto podem ser reciclados no solo agrícola como fonte de nutrientes para as plantas e visando o aumento no teor de matéria orgânica. O objetivo do presente trabalho foi caracterizar a fração orgânica de lodos de esgoto (teores totais, orgânicos e inorgânicos de carbono, nitrogênio e fósforo; concentrações de carbono solúvel em água, açúcares solúveis, proteína bruta, lipídeos, hemicelulose, celulose, lignina, fenóis e taninos totais), de modo a auxiliar no planejamento de seu uso na agricultura. Foram utilizados cinco tipos de lodos de esgoto com diferenças quanto às etapas posteriores de condicionamento químico e/ou tratamento complementar para desidratação, sendo três provenientes de processo anaeróbio: cal e cloreto férrico, desidratado mecanicamente (LAC); polímero sintético e desidratado mecanicamente (LAP); polímero sintético e desidratado termicamente (LAS), e dois de processo aeróbio de digestão: condicionamento com polímero sintético e secagem em leitos (LLP); LLP após processo de compostagem em pilhas aeradas em mistura com bagaço de cana-de-açúcar e restos de poda urbana, composto de lodo (CL). O condicionamento com polímero e secagem térmica conservou mais a matéria orgânica do resíduo, o que foi evidenciado pela presença de maiores teores de compostos orgânicos facilmente degradáveis, bem como de carbono (337,24 g kg -1 ), nitrogênio (39,02 g kg -1 ) e fósforo (2,93 g kg -1 ) no compartimento orgânico. Em todos os lodos houve expressiva participação do conteúdo protéico na matéria orgânica, que foi de aproximadamente 43, 42, 28 e 25 % para os lodos de esgoto LAC, LAP, LAS, LLP e CL, respectivamente. Palavras-chave: biossólidos, compostos orgânicos, fertilizante orgânicoChemical composition of sewage sludge organic matter ABSTRACT Sewage sludge can be recycled in agricultural soil as a source of plant nutrients and in order to increase the organic matter content. The objective of this study was to characterize the organic fraction of sewage sludge (contents of carbon, nitrogen and total organic and inorganic phosphorus; concentrations of protein, fat, fiber, phenol and tannin) in order to assist in planning their use in agriculture. Five types of sewage sludge with differences were used for the later stages of chemical conditioning and / or complementary treatment for dehydration, three from anaerobic process: lime and ferric chloride, mechanically dehydrated (LAC); synthetic polymer and dehydrated mechanically (LAP); synthetic polymer and thermally dehydrated (LAS), and two aerobic digestion process: etching synthetic polymers with drying beds (LLP); LLP after the composting process in aerated piles mixed with bagasse from sugar and urban pruning debris, sludge compost (CL). The conditioning polymer and heat drying the organic matter retained in the residue, which was evidenced by the presence of higher concentrations of readily degradable organic compounds and carbon (337.24 g kg -1 ), nitrogen (39.02 g kg -1 ) and phosphorus (2.93 g kg -1 ) in the organic compartment. In all sludg...

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“…A comparison, other than RochaSantos et al (2010) in terms of phenol individual composition specially concerning E. globulus bleached kraft pulp mill effluents after secondary treatment, was not possible since such a specific study was not found in the available literature and, on the other hand, phenols concentration depends among other factors, on the type of process, type of wood materials, process technology, process bleaching and type of secondary treatment of the effluent. The very small range of concentrations of phenols (Table 2), between 45.6 and 53.8 ng/l, may be due to the fact that the secondary treatment of effluents by activated sludge process could lead to low concentrations of phenols as reported by Dignac et al (2000) in a study of domestic wastewater. The recovery tests showed a high extraction efficiency of the SPE procedure on the extraction of phenols from BKPME samples, suggesting that the low concentrations of phenols could not be attributed to an analytical artefact.…”

Section: Discussionmentioning

confidence: 88%

Evaluation of tertiary treatment by fungi, enzymatic and photo-Fenton oxidation on the removal of phenols from a kraft pulp mill effluent: a comparative study

et al. 2010

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Pulp and paper mills generate pollutants associated to their effluents depending upon the type of process, type of the wood materials, process technology applied, management practices, internal recirculation of the effluent for recovery, the amount of water used in the industrial process and type of secondary treatment. This study is the first that reports a simultaneous evaluation of the effects of tertiary treatments by fungi (Rhizopus oryzae and Pleurotus sajor caju), by enzyme (laccase) and by an oxidation process (photo-Fenton) on individual phenols (vanillin, guaiacol, phloroglucinol, vanillic acid and syringic acid) of a Eucalyptus globulus bleached kraft pulp and paper mill final effluent after secondary treatment (BKPME). The tertiary treatments were applied on BKPME samples and in BKPME samples supplemented with extra concentration of each phenol. Tertiary treatments by Rhizopus oryzae and photo-Fenton oxidation were able of complete removal (100%) of phenols on BKPME samples whereas P. sajor caju and laccase were able of 60-85% removal. On BKPME samples with added concentration of each phenol, photo-Fenton was the only treatment capable of total phenols removal (100%), which suggests a great potential for its application.

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Fate of wastewater organic pollution during activated sludge treatment: nature of residual organic matter

Cited by 213 publications

References 19 publications

Behavior of lipids in biological wastewater treatment processes

Behavior of lipids in biological wastewater treatment processes

Composição química da matéria orgânica de lodos de esgoto

Evaluation of tertiary treatment by fungi, enzymatic and photo-Fenton oxidation on the removal of phenols from a kraft pulp mill effluent: a comparative study

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