Towards green thermal power plants with blowdown water reuse and simultaneous biogenic nanostructures recovery from waste

Jain, Rahul; Nigam, Harshita; Mathur, Megha; Malik, Anushree; Arora, Upain Kumar

doi:10.1016/j.resconrec.2020.105283

Cited by 17 publications

(3 citation statements)

References 56 publications

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“…The pellets were washed 2–3 times with PBS of 0.15 M and placed for lyophilization (Allied Frost FD3). The dried microalgal powder was ground and homogenized with KBr at the ratio of 1:100, and the mixture was pressed by a molding machine with a pressure load of 200 kg cm −2 for 5 min [ 38 ]. The fine KBr pellet which consists of dried microalgae pwder was prepared and placed at the deuterated triglycine sulfate (DTGS) detector of Nicolet Is50 (Thermo Scientific) FT-IR spectrometer.…”

Section: Methodsmentioning

confidence: 99%

A novel nanoemulsion-based microalgal growth medium for enhanced biomass production

Nigam¹,

Pant²,

Singh

2021

Biotechnol Biofuels

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Background Microalgae are well-established feedstocks for applications ranging from biofuels to valuable pigments and therapeutic proteins. However, the low biomass productivity using commercially available growth mediums is a roadblock for its mass production. This work describes a strategy to boost algal biomass productivity by using an effective CO2 supplement. Results In the present study, a novel nanoemulsion-based media has been tested for the growth of freshwater microalgae strain Chlorella pyrenoidosa. Two different nanoemulsion-based media were developed using 1% silicone oil nanoemulsion (1% SE) and 1% paraffin oil nanoemulsion (1% PE) supplemented in Blue-green 11 media (BG11). After 12 days of cultivation, biomass yield was found highest in 1% PE followed by 1% SE and control, i.e., 3.20, 2.75, and 1.03 g L−1, respectively. The chlorophyll-a synthesis was improved by 76% in 1% SE and 53% in 1% PE compared with control. The respective microalgal cell numbers for 1% PE, 1% SE and control measured using the cell counter were 3.00 × 106, 2.40 × 106, and 1.34 × 106 cells mL−1. The effective CO2 absorption tendency of the emulsion was highlighted as the key mechanism for enhanced algal growth and biomass production. On the biochemical characterization of the produced biomass, it was found that the nanoemulsion-cultivated C. pyrenoidosa had increased lipid (1% PE = 26.80%, 1% SE = 23.60%) and carbohydrates (1% PE = 17.20%, 1% SE = 18.90%) content compared to the control (lipid = 18.05%, carbohydrates = 13.60%). Conclusions This study describes a novel nanoemulsion which potentially acts as an effective CO2 supplement for microalgal growth media thereby increasing the growth of microalgal cells. Further, nanoemulsion-cultivated microalgal biomass depicts an increase in lipid and carbohydrate content. The approach provides high microalgal biomass productivity without altering morphological characteristics like cell shape and size as revealed by field emission scanning electron microscope (FESEM) images. Graphical abstract

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Section: Methodsmentioning

confidence: 99%

A novel nanoemulsion-based microalgal growth medium for enhanced biomass production

Nigam¹,

Pant²,

Singh

2021

Biotechnol Biofuels

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“…This method yielded satisfactory results; however, the process could not remove organic matter (3.3 mg/L) [40]. Jain et al (2021) indicated that the removal of silica (reactive and colloidal) using diatom biofilms developed from water generated from cooling towers of thermal power plants may save annually 1485 MLD of fresh water, in addition to the generation of value-added products (biogenic silica) [41]. In a previous study, the water reuse systems were optimized using an advanced control system for RO, in which more than Euro 10,000,000 could be saved per year in large RO facilities (>30.000 m 3 /day) [42].…”

Section: Tertiary Treatment (Tt)mentioning

confidence: 99%

Treatment Technologies and Guidelines Set for Water Reuse

Abou-Shady¹,

El-Araby²

2023

Sustainable Development

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Water reuse is considered a practice that is currently embraced worldwide owing to the exacerbated water crisis, which is the result of several factors such as the increasing world population, urbanization, industrial sector, global climate change, limited water resources, and agricultural activities. Water reuse is not used intensively only in arid and semi-arid regions, which are characterized by limited water supply but can also be applied in countries that possess sufficient water resources (e.g., Brazil and Canada are implementing policies for water reuse). This chapter discusses the treatment technologies proposed for water reuse and presents some recent guidelines set for water reuse. Treatment technologies typically have three main processes: primary, secondary, and tertiary. There are several set guidelines worldwide for water reuse, however, a universal standard guideline to facilitate the reuse of reclaimed water has not been established. No federal regulations for reusing recycled water have been established in the United States; however, several individual states and territories have established specific regulations to manage reclaimed water for various purposes, including agricultural irrigation, animal watering, and crop production.

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“…The MCT/VS-based reactive dye wastewater arising from UV/H 2 O 2 treatment may be used in up to two dyeing cycles without decreasing the color quality of the dyed cotton [43]. In another study [44], removing silica (reactive and colloidal) using diatom biofilms from the water generated from cooling tower blowdown of thermal power plants resulted in annual savings of 1485 megaliters/day (MLD) of fresh water, in addition to generating value-added products (biogenic silica). Chang et al highlighted that it is feasible to increase the number of cycles for reusing the wastewater generated during the production of conventional polyvinyl alcohol sponge, but not all recycled wastewater, after blending it with fresh reactant solution.…”

Section: Water Reuse In Industrymentioning

confidence: 99%

A Critical Review of Recent Progress in Global Water Reuse during 2019–2021 and Perspectives to Overcome Future Water Crisis

Abou-Shady,

Siddique,

2023

Environments

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The exacerbation of the global water crisis due to an increase in global population, industrialization, urbanization, and agricultural activities, along with global climate change and limited water resources, makes water reuse inevitable in all continents. By 2030, global water consumption may grow to ~160% of the currently available volume. This study reviews recently published articles (2019–2021) to explore global case studies of water reuse and discusses future perspectives by country based on a literature survey on water reuse. There are 17 obstacles reported worldwide regarding water reuse (e.g., the properties and low amounts of treated water, regulations, financial challenges, etc.) and 10 advantages of utilizing reused water in various fields (e.g., overcoming the global water crisis, improving the economy, benefiting the industrial sector, etc.). The concept of reusing water has been accepted by countries in almost every continent (e.g., Australia, Europe, Asia, Africa, South America, and North America); the technical findings from different countries are summarized in this study. The water reuse scenario is not restricted to countries with limited water supply and can be applied to those with sufficient water resources (e.g., Canada and Brazil have also implemented water reuse policies). Water reuse can be utilized by human beings via indirect and direct potable recycling, as well as in agriculture, textile, construction, hotel, groundwater recharge, and aquaculture industries. However, a standard guideline for the application of reclaimed water at a global scale is unavailable. Several perspectives have been suggested for the future utilization of reclaimed water worldwide as an effort to secure and ensure the sustainability of existing natural water resources. Lastly, water reuse may be considered a potential alternative for reducing the burden on water resources in the future.

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Towards green thermal power plants with blowdown water reuse and simultaneous biogenic nanostructures recovery from waste

Cited by 17 publications

References 56 publications

A novel nanoemulsion-based microalgal growth medium for enhanced biomass production

A novel nanoemulsion-based microalgal growth medium for enhanced biomass production

Treatment Technologies and Guidelines Set for Water Reuse

A Critical Review of Recent Progress in Global Water Reuse during 2019–2021 and Perspectives to Overcome Future Water Crisis

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