Biogas Digestate and Its Electrodialysis Concentrate as Alternative Media Composition for A. platensis Cultivation: A Study on Nutrient Recovery from Dairy Wastewater.

IF 3.8 3区 医学 Q2 ENGINEERING, BIOMEDICAL
Elena Singer, Sun-Hwa Jung, Vivekanand Vivekanand, Christoph Lindenberger
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Abstract

The dairy industry generates substantial nutrient-rich wastewater, posing environmental challenges if discharged untreated. This study explores the potential of using the cyanobacterium Arthrospira platensis for nutrient recovery from dairy wastewater, precisely the liquid biogas digestate (BD). The research investigates the feasibility of utilising BD and electrodialysis-concentrated BD (BD concentrate) as alternative media for A. platensis cultivation, with a focus on biomass productivity, nutrient uptake, and high-value product formation. Batch and continuous cultivation modes were employed. In batch experiments, biomass productivity was in the ratio of 0 and 0.27 g L-1 d-1, which was 8-100% lower than simulated values for all five tested media compositions. Phosphate fixation was limited with no fixation during batch cultivation and 8-69% during continuous cultivation, likely due to suboptimal N/P ratios, while ammonium removal remained consistently high (>98%). Phycocyanin yield decreased significantly by 92% at high BD concentrate concentrations compared to standard media. Continuous cultivation with 50% BD concentrate improved biomass productivity to 1.02 g L-1 d-1 and pigment yield to 107.9 mg g-1, suggesting a sufficient supply of nutrients. The findings highlight the potential of BD-based media for nutrient recovery but emphasise the need for optimisation strategies, such as nutrient supplementation and microbial adaptation, to enhance performance.

沼气池及其电透析浓缩液作为白僵菌栽培的替代培养基——乳品废水中养分回收的研究。
乳业产生大量富含营养的废水,如果不加处理就会对环境造成挑战。本研究探讨了利用蓝藻platarthrospira (Arthrospira platensis)从乳制品废水中回收营养物质的潜力,即液体沼气消化池(BD)。本研究探讨了利用双酚d和电渗析浓缩双酚d(双酚d浓缩液)作为platensis替代培养基的可行性,重点研究了生物量生产力、养分吸收和高价值产品的形成。采用间歇式和连续式培养方式。在批量试验中,5种培养基组合的生物量生产力为0和0.27 g L-1 d-1,比模拟值低8-100%。磷酸盐固定受到限制,在间歇培养期间没有固定,在连续培养期间8-69%,可能是由于N/P比不理想,而铵的去除率一直很高(>98%)。与标准培养基相比,高BD浓缩物浓度下藻蓝蛋白产量显著下降92%。用50% BD浓缩液连续栽培,生物量生产力提高到1.02 g L-1 d-1,色素产量提高到107.9 mg g-1,表明养分供应充足。这些发现强调了基于bd的培养基在营养恢复方面的潜力,但强调需要优化策略,例如营养补充和微生物适应,以提高性能。
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来源期刊
Bioengineering
Bioengineering Chemical Engineering-Bioengineering
CiteScore
4.00
自引率
8.70%
发文量
661
期刊介绍: Aims Bioengineering (ISSN 2306-5354) provides an advanced forum for the science and technology of bioengineering. It publishes original research papers, comprehensive reviews, communications and case reports. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. All aspects of bioengineering are welcomed from theoretical concepts to education and applications. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. There are, in addition, four key features of this Journal: ● We are introducing a new concept in scientific and technical publications “The Translational Case Report in Bioengineering”. It is a descriptive explanatory analysis of a transformative or translational event. Understanding that the goal of bioengineering scholarship is to advance towards a transformative or clinical solution to an identified transformative/clinical need, the translational case report is used to explore causation in order to find underlying principles that may guide other similar transformative/translational undertakings. ● Manuscripts regarding research proposals and research ideas will be particularly welcomed. ● Electronic files and software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. ● We also accept manuscripts communicating to a broader audience with regard to research projects financed with public funds. Scope ● Bionics and biological cybernetics: implantology; bio–abio interfaces ● Bioelectronics: wearable electronics; implantable electronics; “more than Moore” electronics; bioelectronics devices ● Bioprocess and biosystems engineering and applications: bioprocess design; biocatalysis; bioseparation and bioreactors; bioinformatics; bioenergy; etc. ● Biomolecular, cellular and tissue engineering and applications: tissue engineering; chromosome engineering; embryo engineering; cellular, molecular and synthetic biology; metabolic engineering; bio-nanotechnology; micro/nano technologies; genetic engineering; transgenic technology ● Biomedical engineering and applications: biomechatronics; biomedical electronics; biomechanics; biomaterials; biomimetics; biomedical diagnostics; biomedical therapy; biomedical devices; sensors and circuits; biomedical imaging and medical information systems; implants and regenerative medicine; neurotechnology; clinical engineering; rehabilitation engineering ● Biochemical engineering and applications: metabolic pathway engineering; modeling and simulation ● Translational bioengineering
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