Toxicity alleviation for microalgae cultivation by cationic starch addition and ammonia stripping and study on the cost assessment

Jun, Li; Wang, Lin; Lu, Qian

doi:10.1039/c9ra03454d

Cited by 25 publications

(17 citation statements)

References 50 publications

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“…The purpose of these experiments was to evaluate the algal growth performances at different dilution rates of ALD. Dilution of ALD was considered as a necessary step in order to alleviate its toxicity due to high ammonium and turbidity content [8,19]. a seeding of these cultures was carried out on ALD at different dilution concentrations (dilution of 1:20, 1:30 and 1:50 using distilled water).…”

Section: Indoor Batch Cultivation Of Microalgae Testing Various Digesmentioning

confidence: 99%

“…As a result, specific growth of 0.03, 0.05 and 0.13 d −1 were calculated for digestate dilutions of L 20, L 30 and L 50 respectively (Figure 2a). In the case of low diluted digestate (L 20), the microalgae growth noticeable decelerated after 12 days, due to probably the high turbidity and the high initial ammonium concentration (98.8 mg L −1 ), which can presents toxicity for microalgae cells [11,19]. Dhup et al (2014) reported similar specific growth rate ranging from 0.05 and 0.09 d −1 when the microalgae Monoraphidium sp.…”

Section: Impact Of Liquid-digestate Dilution On Microalgae Growth On mentioning

confidence: 99%

“…ranging from 0.04 to 0.9 d −1 at different inoculum/substrate ratio [35]. The dilution ratio that should be applied to improve microalgae growth by minimizing ammonia and turbidity toxicity is highly dependent on the liquid digestate nature and origin but value from literature are ranging from 1:10 until 1:100 [12,19,36]. To improve the overall environmental and economic feasibility of the process, it can be planned as future works to replace part of the tap water by agro-industrial wastewaters to reduce the ALD turbidity.…”

Section: Impact Of Liquid-digestate Dilution On Microalgae Growth On mentioning

confidence: 99%

“…For instance, Zuliani et al (2016) have investigated the cultivation of Chlorella vulgaris on different anaerobic digestates deriving from municipal wastewater, sewage sludge or agro-waste treatment plants in closed photobioreactor [13]. Nonetheless, considering microalgae cultivation on liquid digestate, two major issues should be addressed as the high turbidity of liquid digestate caused by suspended materials and its high ammonia content that can significantly affect the microalgae growth efficiency [8,11,19]. Xia and Murphy (2016) reported that concentration of total ammonia nitrogen (TAN) varying from 50 to 260 mg/L of TAN can inhibit the microalgae growth [11].…”

Section: Introductionmentioning

confidence: 99%

“…Xia and Murphy (2016) reported that concentration of total ammonia nitrogen (TAN) varying from 50 to 260 mg/L of TAN can inhibit the microalgae growth [11]. For these purposes, two mains strategies that have been investigated in literature data are dilution of the digestate with water [12,13] or liquid digestate treatments to alleviate its toxicity [8,15,19].Until now, diverse technologies of reactors have been used in microalgae cultivation by means of open systems raceway, tubular, column and flat photobioreactors [20], with Chlorella sp. being one of the main microalgae species investigated in literature [12,13,21].…”

Section: Introductionmentioning

confidence: 99%

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Production of Microalgal Slow-Release Fertilizer by Valorizing Liquid Agricultural Digestate: Growth Experiments with Tomatoes

Jimenez¹,

Μάρκου²,

Tayibi

et al. 2020

Applied Sciences

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Anaerobic Digestion (AD) is a process that is well-known and fast-developing in Europe. AD generates large amounts of digestate, especially in livestock-intensive areas. Digestate has potential environmental issues due to nutrients (such as nitrogen) lixiviation or volatilization. Using liquid digestate as a nutrient source for microalgae growth is considered beneficial because digestate could be valorized and upgraded by the production of an added value product. In this work, microalgal biomass produced using liquid digestate from an agricultural biogas plant was investigated as a slow-release fertilizer in tomatoes. Monoraphidium sp. was first cultivated at different dilutions (1:20, 1:30, 1:50), in indoor laboratory-scale trials. The optimum dilution factor was determined to be 1:50, with a specific growth rate of 0.13 d−1 and a complete nitrogen removal capacity in 25 days of culture. Then, outdoor experiments were conducted in a 110 dm3 vertical, closed photobioreactors (PBRs) in batch and semi-continuous mode with 1:50 diluted liquid digestate. During the batch mode, the microalgae were able to remove almost all NH4+ and 65 (±13) % of PO43−, while the microalgal growth rate reached 0.25 d−1. After the batch mode, the cultures were switched to operate under semi-continuously conditions. The cell densities were maintained at 1.3 × 107 cells mL−1 and a biomass productivity around 38.3 mg TSS L−1 d−1 during three weeks was achieved, where after that it started to decline due to unfavorable weather conditions. Microalgae biomass was further tested as a fertilizer for tomatoes growth, enhancing by 32% plant growth in terms of dry biomass compared with the control trials (without fertilization). Similar performances were achieved in tomato growth using synthetic fertilizer or digestate. Finally, the leaching effect in soils columns without plant was tested and after 25 days, only 7% of N was leached when microalgae were used, against 50% in the case of synthetic fertilizer.

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Section: Indoor Batch Cultivation Of Microalgae Testing Various Digesmentioning

confidence: 99%

Section: Impact Of Liquid-digestate Dilution On Microalgae Growth On mentioning

confidence: 99%

Section: Impact Of Liquid-digestate Dilution On Microalgae Growth On mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Production of Microalgal Slow-Release Fertilizer by Valorizing Liquid Agricultural Digestate: Growth Experiments with Tomatoes

Jimenez¹,

Μάρκου²,

Tayibi

et al. 2020

Applied Sciences

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Emerging technologies of algae‐based wastewater remediation for bio‐fertilizer production: a promising pathway to sustainable agriculture

Zou¹,

Zeng

et al. 2020

J of Chemical Tech & Biotech

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Soil degradation, overuse of chemical fertilizer, and biodiversity loss are serious problems challenging the sustainable development of modern agriculture. In recent years, owing to the advantages of algae biotechnology in nutrients recovery and soil improvement, the integration of algae‐based wastewater remediation and algal bio‐fertilizer production is emerging into the limelight. In this work, we emphasize on the progresses achieved in the fields of biomass production by algae cultivation in wastewater and application of algal bio‐fertilizers. Particularly, three types of algal bio‐fertilizers, including slow‐release bio‐fertilizer, nitrogen‐fixing cyanobacteria, and liquid bio‐fertilizer, widely evaluated and utilized in agriculture are introduced. To prevent the overly optimistic prediction of algal bio‐fertilizer in a real‐world application, we point out the challenges and technical defects, such as presence of new pollution factors in wastewater, high cost of algal biomass, contamination of algal biomass in wastewater, low productivity of algae and valuable components, high water consumption, and potential threats of cyanobacteria to the environment, that prevent the concept of integrating algae‐based wastewater remediation and algal bio‐fertilizer production from becoming a reality. Based on our knowledge and experience, potential solutions to the aforementioned problems are discussed in depth. It is expected that the emerging technologies of algae‐based wastewater remediation for bio‐fertilizer production will bring human beings into a new era of environmentally‐friendly, high‐yield, and resource‐recycling agriculture. © 2020 Society of Chemical Industry (SCI)

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Microalgae for nutrient recycling from food waste to aquaculture as feed substitute: a promising pathway to eco‐friendly development

Deng

Chen

Liao

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: The discharge of food waste and eutrophication in aquaculture could cause environmental pollution and ecological disasters in the hydrosphere. Herein, a novel model of growing microalgae to recover nutrients from food waste and produce feed substitute for aquaculture is proposed. RESULTS: This study developed different methods to pretreat soybean fermentation effluent (SFE) and assessed the contribution of algal growth to nutrient recovery from SFE. Particularly, change of bacterial community was analyzed to explore the interaction between microalgae and bacteria in SFE remediation. In addition, the inclusion level of microalgae in fish diet was optimized and the effect of fresh microalgae on the aquaculture environment was studied. The results showed that unsterilized SFE with appropriate dilution is favorable for microalgal growth and biomass accumulation. Interaction between microalgae and acidogenic bacteria, including Prevotella sp., Acidaminococcus sp. and Lactobacillus sp., favored nutrient recovery from SFE. Removal efficiency of chemical oxygen demand, total nitrogen, total phosphorus and total ammonia‐nitrogen in SFE reached 95.66%, 35.35%, 57.70% and 42.21%, respectively. As the optimal inclusion level of microalgae in fish diet was set as 25%, body length and weight of Micropterus salmoides increased by 13.85 mm and 1.73 g in 44‐day culture. It was also found that fresh microalgae added in fish diet could effectively keep the ammonia concentration in aquaculture system at a lower level. CONCLUSION: The implementation of this model will be of importance to circular economies integrating food waste remediation and eco‐friendly aquaculture. © 2021 Society of Chemical Industry (SCI).

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Toxicity alleviation for microalgae cultivation by cationic starch addition and ammonia stripping and study on the cost assessment

Abstract: Aiming at promoting microalgae-based anaerobically digested swine manure (AD-SM) treatment, this work evaluated the feasibility of removing turbidity and ammonia in swine manure by cationic starch addition and air bubbling-driven ammonia stripping.

Cited by 25 publications

References 50 publications

Production of Microalgal Slow-Release Fertilizer by Valorizing Liquid Agricultural Digestate: Growth Experiments with Tomatoes

Production of Microalgal Slow-Release Fertilizer by Valorizing Liquid Agricultural Digestate: Growth Experiments with Tomatoes

Emerging technologies of algae‐based wastewater remediation for bio‐fertilizer production: a promising pathway to sustainable agriculture

Microalgae for nutrient recycling from food waste to aquaculture as feed substitute: a promising pathway to eco‐friendly development

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