Leito de drenagem: sistema natural para redução de volume de lodo de estação de tratamento de água

Achon, Cali Laguna; Barroso, Marcelo Melo; Cordeiro, João Sérgio

doi:10.1590/s1413-41522008000100008

Cited by 13 publications

(10 citation statements)

References 3 publications

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“…The water treatment processes in WTPs produce residues, mostly water used for washing the filters and sludge from sedimentation tanks/floaters [39]. Particularly, in WTPs with cyanobacteria problems, the sludge generated is composed of microalgae biomass.…”

Section: Removal Of Microalgae From Water Using Moringa Oleifera As mentioning

confidence: 99%

Viable Alternatives Study for Reusing Lipids from Microalgae Biomass Present in the Generated Sludge in the Supply Water Treatment Processes

Moreti¹,

Ribeiro²,

Nishi³

2017

Fatty Acids

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This chapter aims to evaluate the microalgae species' removal efficiency, using Moringa oleifera powder seeds as a natural coagulant with subsequent lipid profile characterization. For the tests were used deionized water artificially contaminated with cell cultures of Anabaena flos-aquae and Chlorella vulgaris, with a cell density in the order of 10 4 and 10 6 cells mL-1 , respectively. Coagulation/flocculation/dissolved air flotation (C/F/DAF) tests were conducted using 'Flotest' equipment, using M. oleifera powder seeds in the dosage range of 50-1000 mg L −1. For fatty acid profile analyses, a gas chromatograph equipped with a flame ionization detector was used. Variations of the coagulant dosages showed that there was a difference between dosages and that 100 mg L-1 provided the best removal efficiency for A. flos-aquae (96.5, 80.5 and 78.1%) and 140 mg L −1 for C. vulgaris (90.5, 78.34 and 70%) of the tested parameters of chlorophyll, color and turbidity, respectively. In relation to the produced sludge, it was observed that the use of this coagulant in the treatment of water contaminated with microalgae produces a biodegradable sludge, rich in lipids, especially oleic acid (>60%). Thus, these results indicate that the sludge's reutilization could be a good alternative to biodiesel production, as it represents an environmentally viable method for reusing residual biomass produced in the water treatment process.

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Section: Removal Of Microalgae From Water Using Moringa Oleifera As mentioning

confidence: 99%

Viable Alternatives Study for Reusing Lipids from Microalgae Biomass Present in the Generated Sludge in the Supply Water Treatment Processes

Moreti¹,

Ribeiro²,

Nishi³

2017

Fatty Acids

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“…Water treatment Plants (WTP) are important for the human population, because from raw water, usually unsuitable for consumption, they produce drinking water, indispensable to the survival of any living being (Achon et al, 2008). Traditionally, the WTP has a complete system, consisting of steps of raw gathering water, coagulation, flocculation, decanting, filtration and disinfection.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical, microbiological and parasitological characterization of the filter backwash water from a water treatment plant of Blumenau - SC and alternatives for treatment and reuse

Petris¹,

Gonçalves²,

Roratto³

et al. 2019

Rev. ambiente água

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Filter Backwash Water (FBW) from water treatment plants (WTP) is composed of raw water waste, chemicals and microorganisms. Inappropriate disposal of this residue impacts negatively in the environment and in the health of human populations. Aiming to characterize the FBW from one WTP of Blumenau-SC, physiochemical, microbiological and parasitological assessments and tests with different flocculants polymers were performed in order to propose strategies for treatment and reuse of this residue. Subsequently treated liquid is discharged into the Itajaí-Açu River (Class 2). Physicochemical and microbiological analyses showed results higher than those permitted by CONAMA Resolution n° 430/2011 and Giardia duodenalis (Assembly B) cysts and Cryptosporidium spp. oocyst positivity was observed, characterizing as polluted and contaminated residue that shouldn't be released in the hydric body. The anionic flocculant polymer showed satisfactory results in the turbidity sample reduction (99.49%), which may be a promising alternative in the treatment of this residue.

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“…Existem vários trabalhos na literatura nacional e internacional sobre o tema, tais como disposição em ETEs (Carvalho, 2000;Scalize, 2003;Ferreira Filho e Waelkens, 2009;Scalize e Di Bernardo, 2011;Di Bernardo et al, 2011), fabricação de materiais cerâmicos (Oliveira e Holanda, 2008;Tartari et al, 2011) e de tijolos (Teixeira et al, 2006), recuperação de áreas degradadas (Teixeira et al, 2005(Teixeira et al, e 2007Moreira et al, 2009), aplicações agrícolas (Dayton and Basta, 2001;Botero et at, 2009;Park et al, 2009;OH et al, 2010;Figueiredo Neto et al, 2012) e minimização de RETA (Achon et al, 2008;Ferreira Filho e Waelkens, 2009).…”

Section: Introductionunclassified

Disposição de resíduo de ETA em sistema de Tratamento aeróbio de esgoto seguido de lagoa sedimentada

Scalize¹,

Bernardo²,

Soares³

et al. 2014

RDAE

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72 Revista DAE nº197 setembro-dezembro 2014Resumo O trabalho foi realizado utilizando uma instalação piloto (ETEP) constituída de dois módulos de tratamento aeróbio, cada um composto por lagoa de aeração seguida de lagoa de sedimentação, ambos com parâmetros hidráulicos similares ao da ETE, sendo que um funcionou recebendo somente esgoto afluente à ETE. No outro módulo, além de esgoto, foi adicionado resíduo de uma estação de tratamento de água (RETA) que utilizava cloreto férrico como coagulante primário. Por meio de teste estatístico, com nível de significância de 10%, foi verificado que a aplicação de RETA melhorou a qualidade do efluente final do módulo da ETEP em relação aos parâmetros DQO, SST, turbidez, cor aparente, nitrito, NTK e fósforo total. Os demais parâmetros também resultaram melhores, porém com níveis de significância superiores, com exceção do cloreto, nitrato e condutividade, que praticamente ficaram inalterados. Palavras-chave:Resíduos de ETA, lodo, resíduo, estação de tratamento de água. AbstractThis work was carried out in an aerobic pilot plant consisted of modules, each one with an aerated lagoon in series with a sedimentation lagoon, both with hydraulic characteristics similar to the city wastewater treatment plant. Module 1 received water treatment residue besides sewage while module 1 received only sewage. Through the use of statistics methods with significance level of 10 %, it was observed that the module 1, which received the water treatment residue produced a better effluent quality in terms of COD, TSS, turbidity, apparent color, nitrite, TNK and total phosphorus. Other parameters investigated in the effluent of module 1 also resulted better, but with a higher level of significance, except for chlorite, nitrate and conductivity, which practically remained unchanged.

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Leito de drenagem: sistema natural para redução de volume de lodo de estação de tratamento de água

Cited by 13 publications

References 3 publications

Viable Alternatives Study for Reusing Lipids from Microalgae Biomass Present in the Generated Sludge in the Supply Water Treatment Processes

Viable Alternatives Study for Reusing Lipids from Microalgae Biomass Present in the Generated Sludge in the Supply Water Treatment Processes

Physicochemical, microbiological and parasitological characterization of the filter backwash water from a water treatment plant of Blumenau - SC and alternatives for treatment and reuse

Disposição de resíduo de ETA em sistema de Tratamento aeróbio de esgoto seguido de lagoa sedimentada

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