Application of Parachlorella kessleri for treatment of poultry processing wastewater: effect of temperature on nutrient removal rate and protein production

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-07-17 DOI:10.1002/jctb.70022

Luciani de L Souza, Everton Skoronski, Fábio de Farias Neves

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引用次数: 0

Abstract

BACKGROUND

Wastewater produced from the thermal processing of poultry meat contains high levels of nitrogen and phosphorus. Thus, tertiary treatment is required to ensure that the wastewater meets Brazilian environmental regulations. Microalgae are capable of removing nutrients from wastewater and simultaneously synthesizing high-value biomolecules, such as proteins, which perform essential functions (structuring, energy reserve and bioactivity). However, microalgae are sensitive to temperature, which affects biomass productivity and the nutrient removal rate. The southern region of Brazil – where the present study was developed – has a temperate–subtropical climate, with periods of temperatures lower than 10 °C in winter, which may affect microalgal productivity and growth. The aim of the present study was to investigate the influence of temperature on nutrient removal from wastewater produced in a thermal poultry meat processing facility using a microalga-based process with Parachlorella kessleri. Biomass yield, nitrogen and orthophosphate removal efficiency and protein content were assessed at three temperatures (10, 20 and 30 °C) for 13 days.

RESULTS

A yield of 0.049 ± 0.01 g L⁻¹ d⁻¹ was obtained at 20 °C. On the sixth day of cultivation, the ammonia removal rate was 98.79%. Orthophosphate was removed efficiently in all treatments, with rates higher than 90%. Average protein concentration did not differ significantly among the treatments.

CONCLUSION

Monitoring temperature during wastewater treatment is key to understanding the underlying mechanism, especially for nutrient removal and the characterization of biomass. Further studies are needed on the ability of the microalga Parachlorella kessleri to remove orthophosphate over an ambient temperature range. © 2025 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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凯斯氏副杆菌在家禽加工废水处理中的应用：温度对营养物去除率和蛋白质产量的影响

家禽肉热加工产生的废水含有高水平的氮和磷。因此，三级处理是必要的，以确保废水符合巴西的环境法规。微藻能够去除废水中的营养物质，同时合成高价值的生物分子，如蛋白质，具有重要的功能（结构、能量储备和生物活性）。然而，微藻对温度敏感，影响生物量生产力和养分去除率。巴西南部地区——本研究的开展地——属于温带亚热带气候，冬季气温低于10°C，这可能会影响微藻的生产力和生长。本研究的目的是研究温度对禽肉热处理设施中以微藻为基础的凯斯氏副伞藻去除废水中营养物质的影响。在3种温度（10、20和30°C）下测定13天的生物量、氮和正磷酸盐去除效率以及蛋白质含量。结果在20°C条件下，产率为0.049±0.01 g L−1 d−1。培养第6天，氨氮去除率为98.79%。所有治疗均有效去除正磷酸盐，去除率均高于90%。平均蛋白浓度在处理间无显著差异。结论监测废水处理过程中的温度是了解其潜在机制的关键，特别是对营养物去除和生物质表征。需要进一步研究微藻在环境温度范围内去除正磷酸盐的能力。©2025作者。由John Wiley &； Sons Ltd代表美国化学工业学会（SCI）出版的化学技术与生物技术杂志。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.