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Inara Amoroso da Silva Stella Thomaz de Lima Marcos Rechi Siqueira Márcia Andreia Mesquita Silva da Veiga Valeria Reginatto 《Journal of Material Cycles and Waste Management》2018,20(2):777-786
Fermentation can use renewable raw materials as substrate, which makes it a sustainable method to obtain H2. This study evaluates H2 production by a mixed culture from substrates such as glucose and derivatives from sugarcane processing (sucrose, molasses, and vinasse) combined with landfill leachate. The leachate alone was not a suitable substrate for biohydrogen production. However, leachate blended with glucose, sucrose, molasses, or vinasse increased the H2 production rate by 2.0-, 2.8-, 4.6-, and 0.5-fold, respectively, as compared with the substrates without the leachate. Determination of metals (Cu, Cd, Pb, Hg, Ni, and Fe) at the beginning and at the end of the fermentative assays showed how they were consumed during the fermentation and demonstrated improved H2 production. During fermentation, Cu, Fe, and Cd were the most consumed leachate metals. The best substrate combination to produce H2 was molasses and leachate, which gave high volumetric productivity—469 ml H2/l h. However, addition of the leachate to the substrates stimulated lactic acid formation pathways, which lowered the H2 yield. The use of leachate combined with sugarcane processing derivatives as substrates could add value to the leachate and reduce its polluting power, generating a clean energy source from renewable raw materials. 相似文献
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Reginatto Cleomar Cecchin Iziquiel Salvagni Heineck Karla Thomé Antonio Reddy Krishna R. 《Environmental science and pollution research international》2020,27(9):9288-9296
Environmental Science and Pollution Research - Contaminated clay soils pose problems to public health and the environment in several parts of the world. Very little is known about the transport of... 相似文献
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The chemical composition of pectin production wastewater and its toxicity during biological treatment were investigated. Samples
of wastewater from di erent steps of a pectin production wastewater biological treatment plant were investigated including the influent
of the treatment (1), after denitrification tank (2), after anaerobic treatment (3) and final e uent (4). The conventional physicochemical
characteristics of samples did not indicate wastewater toxicity. However, toxicity assessments carried out on Vibrio fischeri and
Scenedesmus subspicatus indicated low EC50 values. The fractionation of the samples using an XAD resin showed that the toxicity was
associated with the organic matter. Wastewater apparent molecular mass distributions were 14.3, 25.0, 24.4 and 29.6 kDa for samples
1–4, respectively. Finally, characteristics of the sample by pyrolisis-gas chromatography-mass spectrometry (Py-CG-MS) demonstrated
its polyphenolic nature and a 23% increase in the levels of such compounds after the first biological treatment step. 相似文献
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Textile effluents cause a high environmental impact when released into the environment without correct treatment. In this work, we have evaluated the capacity of treatment of a textile effluent using a biological and a chemical method using the sequence Phanerochaete chrysosporium-ozone. The fungal treatment was performed by direct incubation of a fungus spore suspension in textile effluent for nine days. Then, the effluent was ozonized at pH 11 and room temperature. Color, total organic carbon, molecular mass distribution and total phenols were determined. In biological experiments, enzymatic activity (lignin peroxidase, manganese peroxidase and laccase) were also monitored. Toxicity tests were carried out with Scenedesmus subspicatus and with Escherichia coli. Good decoloration, total phenols reduction and textile effluent molecular mass reduction were obtained during the process. No significant total organic carbon reduction was observed. The toxicity of the textile effluent was reduced with both test organisms showing no inhibition at the end of the treatment. 相似文献
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