Use of the cyanobacterium Spirulina platensis in cattle wastewater bioremediation

IF 0.6 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Acta Scientiarum-technology Pub Date : 2022-03-11 DOI:10.4025/actascitechnol.v44i1.58806
Denise Salvador de Souza, R. C. Valadão, Alexandre Lioi Nascentes, Leonardo Rafael da Silva, Henrique Vieira de Mendonça
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引用次数: 1

Abstract

In the present study, the microalga Spirulina platensis (Arthrospira) was grown in two horizontal photobioreactors (HPBR) under two different irradiances (150 and 270 μmol m-2 s-2). Anaerobically digested cattle wastewater (ACWW) was used as substrate. The experiment was carried out in batches for a period of 8 days. The maximum specific growth rate of 0.347 day-1 and the doubling time of 2.08 days were obtained under the highest illumination of the culture. Dry biomass production reached maximum values between 2.17 g L-1 and 6.52 g L-1, with volumetric biomass productivities between 0.0812 and 0.5578 g L-1 day-1. Productivity per area was equal to 47.97 g m-2 d-1, which is the highest value recorded compared to those found in the literature consulted. As for CO2 biofixation, relevant values for reducing this gas in the atmosphere were obtained, ranging from 128.52 to 882.36 mg L-1 day-1. In terms of organic matter, 16.3-77% of BOD5 and 12.6-61.6% of COD were reduced. In the reduction of TS, TSS and VSS, values of 71.3-78.5%, 79.5-84.4% and 87.0-88.3%, respectively, were reached. NH4+ reduction was 32.5-98.3%, organic nitrogen reduction was 20.3-95.9% and total phosphorus reduction was 33.5-89.9%. The reductions of thermotolerant coliforms were between 71.7% and 99.9%. In view of the results found, it can be considered that the bioremediation of the effluent reached promising efficiencies, with the advantage of producing biomass with potential to obtain bioproducts of relevant economic value
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蓝藻在牛废水生物修复中的应用
本研究在两个卧式光生物反应器(HPBR)中,在150和270 μmol m-2 s-2两种不同的辐照度下培养了微藻platulina (Arthrospira)。以厌氧消化牛废水(ACWW)为底物。试验分批进行,为期8天。在最高光照条件下,培养物的最大比生长率为0.347 d -1,倍增时间为2.08 d。干生物量产量在2.17 ~ 6.52 g L-1之间达到最大值,体积生物量生产力在0.0812 ~ 0.5578 g L-1 day-1之间。每面积的生产力为47.97 g m-2 d-1,这是与参考文献相比记录的最高值。在CO2生物固定方面,得到了大气中减少该气体的相关值,范围为128.52 ~ 882.36 mg L-1 day-1。有机物方面,BOD5降低16.3 ~ 77%,COD降低12.6 ~ 61.6%。TS、TSS和VSS的降低值分别为71.3 ~ 78.5%、79.5 ~ 84.4%和87.0 ~ 88.3%。NH4+还原率为32.5 ~ 98.3%,有机氮还原率为20.3 ~ 95.9%,总磷还原率为33.5 ~ 89.9%。耐热大肠菌群的减少量在71.7% ~ 99.9%之间。根据所发现的结果,可以认为废水的生物修复达到了令人满意的效率,其优势是生产具有相关经济价值的生物产品潜力的生物质
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来源期刊
Acta Scientiarum-technology
Acta Scientiarum-technology 综合性期刊-综合性期刊
CiteScore
1.40
自引率
12.50%
发文量
60
审稿时长
6-12 weeks
期刊介绍: The journal publishes original articles in all areas of Technology, including: Engineerings, Physics, Chemistry, Mathematics, Statistics, Geosciences and Computation Sciences. To establish the public inscription of knowledge and its preservation; To publish results of research comprising ideas and new scientific suggestions; To publicize worldwide information and knowledge produced by the scientific community; To speech the process of scientific communication in Technology.
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