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1.
Environ Technol ; 40(6): 784-792, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29171794

RESUMO

In this study, potential microalgae species (Chlorella vulgaris, Scenedesmus dimorphus, Chlorococcum sp. and Chlamydomonas sp.) have been studied for nutrient removal from synthetic and industrial wastewater. Batch experiments were carried out to investigate the removal performance among four chosen species at different nitrogen and phosphorus concentrations. NH4-N and PO4-P were varied from 13.2 to 52.8 mg/L and 6.6 to 26.4 mg/L, respectively, by keeping N:P ratio as 2:1. In synthetic wastewater, maximum NH4-N and PO4-P removal efficiencies of 88.6% and 91.2% were obtained with C. vulgaris when compared to the other microalgae studied. Further studies were carried out using C. vulgaris in batch experiments to investigate the nutrient removal performance in secondary treated sewage, soak liquor and composite tannery effluent. Experimental results indicated that NH4-N, NO3-N, PO4-P and chemical oxygen demand (COD) removal efficiencies were found to be 68.6%, 74%, 71.5% and 90.2%, respectively, in secondary treated sewage. Maximum removal efficiencies of NH4-N, NO3-N, PO4-P and COD in composite tannery wastewater were found to be 55%, 85.6%, 60.5% and 43.4%, respectively. In soak liquor, maximum removal efficiencies of NH4-N, NO3-N, PO4-P and COD were found to 66.7%, 62.6%, 63.6% and 93.8%, respectively.


Assuntos
Chlorella vulgaris , Águas Residuárias , Nitrogênio , Nutrientes , Fósforo , Esgotos , Eliminação de Resíduos Líquidos
2.
Environ Technol ; 39(19): 2434-2446, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28707563

RESUMO

The removal of phenol sulfonic acid-syntan (PSAS) in terms of chemical oxygen demand (COD) was studied at different pH, ozone and initial PSAS concentrations and the optimum condition was found to be pH 7, ozone concentration of 5.2 × 10-3 mmol/L and initial PSAS concentration of 500 mg/L. The increase in BOD5/COD ratio confirmed the bio-treatability of ozonated PSAS effluent. The excitation-emission matrix intensity and Fourier transmission infra-red spectroscopy confirmed the generation of intermediate by-product during degradation of PSAS. The ozonation of PSAS was found to obey fast regime pseudo-first-order reaction with a rate constant of 3.7 × 10-9 mol-1 s-1. The mean oxidation state of carbon value between +2 and +3 confirmed that the ozonation of PSAS resulted in partial mineralization.


Assuntos
Ozônio , Purificação da Água , Concentração de Íons de Hidrogênio , Oxirredução , Fenol , Ácidos Sulfônicos
3.
3 Biotech ; 7(5): 304, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28944152

RESUMO

Intestine waste generated from slaughterhouse (IWS) is difficult to degrade in anaerobic process due to the presence of high protein and lipid contents. However, anaerobic co-digestion helps to increase the degradation of IWS by the addition of carbon-rich food waste (FW). To increase the biogas yield, thermo-alkali pretreatment may be more viable method for the anaerobic digestion of protein and lipid rich wastes. In the present study, Thermo-alkali pretreatment of intestine waste from slaughterhouse and food waste alone and mixing of IWS and FW with different ratios (1:1-1:3) on VS basis have been studied. To study the effect of Thermo-alkali pretreatment on solubilization of substrate, the substrate was mixed with alkali solutions (NaOH and KOH) at different concentrations of 1, 2, 3, 4 and 5% solutions. The results revealed that the maximum solubilization was observed to be 94.7% and 90.1% at KOH (1:3 and 5%) and NaOH (1:3 and 5%), respectively. Based on the study, enhancement in biogas yield by 16% (IWS), 11.5% (FW), 12.2% (1:1), 18.11% (1:2) and 22.5% (1:3) in KOH pretreated waste when compared with NaOH pretreated waste.

4.
J Environ Sci Eng ; 54(3): 365-70, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24749195

RESUMO

The conventional biological treatment methods employed in the pulp and paper industries are not effective in reducing the colour and chemical oxygen demand (COD). The white-rot fungi are reported to have the ability to biodegrade the lignin and its derivatives. This paper is focused on the biological treatment of pulp mill effluent from a bagasse-based pulp and paper industry using fungal treatment. Experiments were conducted using the white rot fungus, Trametes versicolor in shake flasks operated in batch mode with different carbon sources. The decolourisation efficiencies of 82.5% and 80.3% were obtained in the presence of 15 g/L and 5 g/L of glucose and sucrose concentrations respectively with a considerable COD reduction. The possibility of reusing the grown fungus was examined for repeated treatment studies.


Assuntos
Celulose/metabolismo , Resíduos Industriais/análise , Trametes/metabolismo , Eliminação de Resíduos Líquidos/métodos , Poluentes Químicos da Água/metabolismo , Biodegradação Ambiental , Análise da Demanda Biológica de Oxigênio , Indústria Editorial , Cor , Glucose/metabolismo , Espectrofotometria Ultravioleta , Sacarose/metabolismo , Trametes/crescimento & desenvolvimento
5.
J Hazard Mater ; 165(1-3): 909-14, 2009 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-19081186

RESUMO

The conventional treatment of dark coloured textile wastewater using chemical coagulation generates large volume of sludge, which requires further treatment and disposal. In the present investigation, a systematic optimization study of the important variables influencing the decolorization of Reactive Orange-16 (RO-16) and Reactive Red-35 (RR-35) dyes by the white-rot fungus (Trametes versicolor) was carried out. A full factorial central composite design was employed for experimental design and optimization of results. The effect of concentrations of dye, glucose and ammonium chloride on decolorization was studied and optimized using Response Surface Methodology (RSM). Maximum decolorization of 94.5% and 90.7% for RO-16 and RR-35 was obtained at optimum concentrations of dye, glucose and ammonium chloride i.e., 0.66, 17.50 and 2.69 g/L for RO-16 and 0.68, 16.67 and 2.13 g/L for RR-35, respectively.


Assuntos
Biodegradação Ambiental , Corantes/isolamento & purificação , Resíduos Industriais/prevenção & controle , Trametes/metabolismo , Poluentes Químicos da Água/isolamento & purificação , Cloreto de Amônio , Compostos Azo , Glucose , Naftalenos , Têxteis , Triazinas , Purificação da Água/métodos
6.
Indian J Dent Res ; 8(3): 86-9, 1997.
Artigo em Inglês | MEDLINE | ID: mdl-9495157

RESUMO

Osteosarcoma, either primary or metastatic, rarely involves the jaws. Though only a few cases of mandibular metastasis of osteosarcoma have been reported, only one case of et al maxillary involvement (Singh, 1978) has been reported. A case of 21 year old boy with metastasis of osteosarcoma to the right maxilla from primary osteosarcoma of the left femur is presented. The patient complained of pain and swelling in the left maxillary region which was earlier diagnosed as maxillary sinusitis on the basis of Water's sinus radiograph in a medical hospital. Further radiographic examination with the panoramic and intraoral periapical radiographs done by us and later by fine needle aspiration cytology led us to diagnose a secondary deposits of osteosarcoma.


Assuntos
Neoplasias Femorais/patologia , Neoplasias Maxilares/secundário , Osteossarcoma/secundário , Adulto , Biópsia por Agulha , Humanos , Masculino , Maxila/diagnóstico por imagem , Maxila/patologia , Neoplasias Maxilares/diagnóstico por imagem , Neoplasias Maxilares/patologia , Osteossarcoma/diagnóstico por imagem , Osteossarcoma/patologia , Radiografia Panorâmica
7.
Indian J Dent Res ; 8(4): 119-22, 1997.
Artigo em Inglês | MEDLINE | ID: mdl-9586526

RESUMO

Malignant melanoma of the oral cavity can be primary or secondary due to metastasis from distant site. Incidence of oral cavity by metastasis of melanoma is 1.85%. Most common oral sites involved are tongue, buccal mucosa and parotid gland. Oral lesions occur as a part of disseminated disease during the advanced stages and has poor prognosis. An unusual case of metastatic malignant melanoma of the maxillary gingiva is reported.


Assuntos
Neoplasias Gengivais/patologia , Melanoma/patologia , Melanoma/secundário , Biópsia , Doenças do Pé/patologia , Gengiva/patologia , Humanos , Metástase Linfática , Masculino , Maxila , Pessoa de Meia-Idade , Neoplasias Cutâneas/patologia
8.
Arch Phys Med Rehabil ; 67(2): 84-7, 1986 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-3954570

RESUMO

Twenty-two stroke patients and their spouses were studied. All patients were living at home and had had a stroke at least one year previously. Of the 22 patients 14 were men and eight were women. Couples were assessed on the variables of morale, family functioning, health status, and patient functional capacity. For all variables, patient-spouse and husband-wife differences were tested. Couples from a previously studied random community sample were matched to the stroke couples on age and socioeconomic status (SES). Identical morale, family functioning, and health status data collected on these couples were compared to the stroke data. The results included the following: Stroke patients and their spouses were healthy on all variables. Members of the couple did not differ on most variables whether compared as husband-wife or patient-spouse. Wives from the two samples did not differ on any variable. Husbands from the stroke sample differed from the matched husbands on only one health variable--the number of doctor visits made in the past six months.


Assuntos
Transtornos Cerebrovasculares/reabilitação , Família , Nível de Saúde , Saúde , Moral , Atividades Cotidianas , Idoso , Transtornos Cerebrovasculares/psicologia , Feminino , Humanos , Masculino , Casamento , Pessoa de Meia-Idade , Distribuição Aleatória , Autocuidado , Apoio Social
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