Rhodovulum sulfidophilum in the treatment and utilization of sardine processing wastewater

Azad, Sujjat Al; Sabaratnam, Vikineswary; Chong, Ving Ching; Ramachandran, K.B.

doi:10.1046/j.1472-765x.2003.01435.x

Cited by 36 publications

(24 citation statements)

References 15 publications

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“…The great amounts of effluents from animal food industries has led to investigations on the use of these by-products as substrates for the growth of phototrophic bacteria that consume organic matter and produce bacterial biomass (PONSANO; LACAVA; AZAD et al, 2004;KANTACHOTE;TORPEE;UMSAKUL, 2005). Due to the nutritional composition of this biomass, some authors have suggested its use as a biofertilizer and animal feed supplement (PONSANO; LACAVA; PONSANO et al, 2004;KANTACHOTE;TORPEE;UMSAKUL, 2005).…”

Section: Production and Drying Of Biomassmentioning

confidence: 99%

Comparison between freeze and spray drying to obtain powder Rubrivivax gelatinosus biomass

et al. 2013

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The use of colorants in products of animal origin is justified by the improvement in the color of foods since this attribute is considered a quality criterion. These additives can be produced using industrial effluents as substrates and appropriate organisms, such as Rubrivivax gelatinosus. Oxycarotenoids represent a class of carotenes responsible for the pigmentation of animals and vegetables. R. gelatinosus grows in fish industry effluent with the resulting production of a bacterial biomass containing oxycarotenoids. The purpose of this study was to compare the use of two drying processes - spray and freeze drying - to obtain powder biomass in terms of the process parameters (yield, productivity, and product recovery) and the product characteristics (color, proximate composition, and oxycarotenoids). No difference was detected in the yield between these techniques, while productivity was higher using spray drying. Higher product recovery and moisture were achieved with freeze drying, while ash was higher with spray drying. The freeze dried biomass was redder, darker and less saturated than the spray dried biomass. No difference in oxycarotenoids was detected between the biomasses. Although it results in lower recovery rate, spray drying was faster and more productive, and it provided the same yield as freeze drying, which makes it the method of choice for obtaining R. gelatinosus biomass.

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Section: Production and Drying Of Biomassmentioning

confidence: 99%

Comparison between freeze and spray drying to obtain powder Rubrivivax gelatinosus biomass

et al. 2013

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“…Besides that, the availability of organic matter in the substrate and the low concentration of metabolic compounds in the beginning of the growth curve rendered these findings favorable. Some authors found much higher cell mass concentrations when growing phototrophic organisms in industry wastewaters but, in those cases, initial organic matter and inoculum levels were also much higher than the ones used in this study and/or nutritional supplementation was adopted (Prasertsan et al 1997;Azad et al 2001Azad et al , 2003. So, from third day on, cell mass production and COD reduction were less expressive, probably due to decrease of organic substrate and increase of byproducts from bacterial growth.…”

Section: Characteristics Of the Bacterial Growthmentioning

confidence: 63%

“…This happens because the particular characteristics of each industrial effluent derive from crude material composition, water supply essence and reuse and industrial processing techniques (Liu 2007). For settled and unsettled wastewaters from sardine processing industry, for example, pH values from 6.2 to 6.3; 63,000 mg l -1 COD and 10.88 mg l -1 TN were described (Azad et al 2001(Azad et al , 2003. For white fish filleting plants, Arvanitoyannis and Kassaveti (2008) reported the generation of wastewaters with 50 kg Chemical Oxygen Demand (COD) and Prasertsan et al (1993) reported 5.3-8.3 pH; 5,950-157,080 mg l -1 COD; 19.30-82.22 g l -1 TS and 666-32,182 mg l -1 OG for liquid effluents from different seafood processing plants.…”

Section: Resultsmentioning

confidence: 99%

Cultivation of Rubrivivax gelatinosus in fish industry effluent for depollution and biomass production

Lima

Ponsano

Pinto

2011

World J Microbiol Biotechnol

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One application of biotechnology that contributes to sustainable development is the utilization of industrial byproducts as substrates for the production of substances of interest by microorganism. In this work, liquid effluent from tilapia fish processing was used as a substrate for the growth of Rubrivivax gelatinosus with the aim of studying the bacterial photo heterotrophic metabolism. Cultivation conditions included 32 ± 2°C, 1,400 ± 200 lux and 7 days. In the initial days, the best cell mass production (0.273 g l -1 with 72 h), specific growth rate (0.188 h -1 with 48 h) and chemical oxygen demand (COD) decrease (43% with 72 h) were reached. Typical bacterial oxycarotenoids were identified after 3 days of cultivation, averaging 3.03 mg g -1 biomass. Bacterial growth in the effluent during the period of study resulted in pH increase to 7.9, total nitrogen, oils and greases and COD decreases of 22.46, 47.71 and 52%, respectively, and dry cell mass production of 0.18 g l -1 . The bacterial growth in the wastewater provided biomass and oxycarotenoids and the removal of pollutant load.

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“…More importantly, the method is characterized by a simple treating process and no excess sludge pollution. Some researchers have proposed to combine wastewater treatment with biomass recovery [18][19][20]. The PSB biomass is rich in single-cell protein, biopolymers, antimicrobial agents, carotene, pantothenic acid, and therapeutic compounds.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Feasibility study and process optimization of citric acid wastewater treatment and biomass production by photosynthetic bacteria

Zhou

Zhang

Lü

et al. 2015

Desalination and Water Treatment

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A B S T R A C TUsing photosynthetic bacteria (PSB) in wastewater treatment could not only eliminate environmental pollutants, but also recycle bacteria biomass. This paper studied the feasibility of using PSB in citric acid wastewater treatment. Some important factors which influence the pollutants removal efficiency and biomass were also examined to determine the optimal conditions. The results showed that PSB could effectively remove pollutants, and biomass production was also achieved. The optimal conditions were initial pH at 7.0, ratio of carbon/nitrogen at 10, initial chemical oxygen demand (COD) of 2,400 mg/L, natural lightmicro aerobic condition, and hydraulic retention time of 40 h. Under these conditions, the removal rate of COD and the biomass could reach 89.4% and 2,250 mg/L, respectively, and the biomass yield was 0.76 mg -biomass /mg -COD-removal . By process evaluation, compared with anaerobic wastewater treatments, this process had better effluent quality and simpler process, compared with aerobic wastewater treatment, this process had the advantage of biomass recovery.

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Rhodovulum sulfidophilum in the treatment and utilization of sardine processing wastewater

Cited by 36 publications

References 15 publications

Comparison between freeze and spray drying to obtain powder Rubrivivax gelatinosus biomass

Comparison between freeze and spray drying to obtain powder Rubrivivax gelatinosus biomass

Cultivation of Rubrivivax gelatinosus in fish industry effluent for depollution and biomass production

Feasibility study and process optimization of citric acid wastewater treatment and biomass production by photosynthetic bacteria

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