scholarly journals Aquaculture wastewater treatment through microalgal. Biomass potential applications on animal feed, agriculture, and energy

2021 ◽  
Vol 286 ◽  
pp. 112187
Author(s):  
Catarina Viegas ◽  
Luísa Gouveia ◽  
Margarida Gonçalves
Keyword(s):  
Wastewater Treatment ◽  
Animal Feed ◽  
Microalgal Biomass ◽  
Potential Applications ◽  
Biomass Potential ◽  
Aquaculture Wastewater

scholarly journals A Feasibility Study of Wastewater Treatment Using Domestic Microalgae and Analysis of Biomass for Potential Applications

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2294 ◽  
Author(s):  
Jeong-Mi Do ◽  
Seung-Woo Jo ◽  
Il-Sup Kim ◽  
Ho Na ◽  
Jae Hak Lee ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Renewable Energy ◽  
Calorific Value ◽  
Ammonia Nitrogen ◽  
Proximate Analysis ◽  
Industrial Applications ◽  
Terrestrial Plants ◽  
Microalgal Biomass ◽  
Nutrient Consumption ◽  
Potential Applications

Water scarcity and emerging demands for renewable energy have increased concerns about energy security and advanced wastewater treatment, and microalgae have emerged as promising candidates to solve these problems. This study assesses the feasibility of microalgal wastewater treatment, and the utilization of the resulting microalgal biomass, as a renewable energy source. We cultured four selected microalgal species in filtered wastewater collected from the municipal treatment facility in Daegu, Republic of Korea. We measured nutrient consumption, growth rate, and physicochemical properties during cultivation, then analyzed the biomass for biochemical composition, ultimate analysis, proximate analysis, and biodiesel and lubricant properties, to estimate its potential applications. Desmodesmus sp. KNUA024 emerged as the most promising strain, removing 99.10% of ammonia nitrogen, 91.31% of total nitrogen, and 95.67% of total phosphate. Its biomass had a calorific value of 19.5 MJ kg−1, similar to terrestrial plants. α-linolenic acid was the most abundant polyunsaturated fatty acid (PUFA; 54.83%). Due to its PUFA content, Desmodesmus sp. KNUA024 also had a high iodine value, indicating its potential for use as a bio-lubricant. Therefore, Desmodesmus sp. KNUA024 shows promise for wastewater treatment, energy, and industrial applications.

scholarly journals Production of Microalgal Biomass Using Aquaculture Wastewater as Growth Medium

Water ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 106 ◽  
Author(s):  
Małgorzata Hawrot-Paw ◽  
Adam Koniuszy ◽  
Małgorzata Gałczyńska ◽  
Grzegorz Zając ◽  
Joanna Szyszlak-Bargłowicz
Keyword(s):  
Wastewater Treatment ◽  
Environmental Pollution ◽  
Lipid Content ◽  
Biomass Concentration ◽  
Huge Amount ◽  
Initial Value ◽  
Nitrogen And Phosphorus ◽  
Microalgal Biomass ◽  
High Lipid ◽  
Aquaculture Wastewater

Aquaculture wastewater contains a huge amount of substances that can cause environmental pollution. However, microalgae can absorb these compounds and convert them into useful biomass. In this study, Chlorella minutissima was grown in the wastewater resulting from saline aquaculture. The microalgae were found to effectively utilize nitrogen and phosphorus in the wastewater for its growth. During wastewater treatment, the cell density increased almost fivefold compared to the initial value (OD680 0.502). Moreover, batch culture resulted in the maximum biomass concentration and productivity of 4.77 g/L and 0.55 g/L/day, respectively. The contents of total nitrogen and total phosphorus in wastewater decreased by 88% and over 99%, respectively. In addition, the content of N-NO3 was reduced by 88.6%, N-NO2 by 74.3%, and dissolved orthophosphates (V) by 99%. At the beginning and throughout the experiment, the content of N-NH4 in wastewater remained below 0.05 mg/L. Furthermore, a high lipid content of 46.4% (w/w) was also obtained from the studied microalgae.

scholarly journals Treatment of Wastewaters by Microalgae and the Potential Applications of the Produced Biomass—A Review

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 27
Author(s):  
Hareb Al-Jabri ◽  
Probir Das ◽  
Shoyeb Khan ◽  
Mahmoud Thaher ◽  
Mohammed AbdulQuadir
Keyword(s):  
Trace Elements ◽  
Wastewater Treatment ◽  
Review Paper ◽  
Biological Method ◽  
Microalgal Biomass ◽  
Different Types ◽  
Potential Applications ◽  
Pollutants Removal ◽  
Future Direction ◽  
Nitrogen Phosphorus

The treatment of different types of wastewater by physicochemical or biological (non-microalgal) methods could often be either inefficient or energy-intensive. Microalgae are ubiquitous microscopic organisms, which thrive in water bodies that contain the necessary nutrients. Wastewaters are typically contaminated with nitrogen, phosphorus, and other trace elements, which microalgae require for their cell growth. In addition, most of the microalgae are photosynthetic in nature, and these organisms do not require an organic source for their proliferation, although some strains could utilize organics both in the presence and absence of light. Therefore, microalgal bioremediation could be integrated with existing treatment methods or adopted as the single biological method for efficiently treating wastewater. This review paper summarized the mechanisms of pollutants removal by microalgae, microalgal bioremediation potential of different types of wastewaters, the potential application of wastewater-grown microalgal biomass, existing challenges, and the future direction of microalgal application in wastewater treatment.

Economic, energy and carbon footprint assessment of integrated forward osmosis membrane bioreactor (FOMBR) process in urban wastewater treatment

2020 ◽  
Vol 6 (1) ◽  
pp. 153-165 ◽  
Author(s):  
Nur Hafizah Ab Hamid ◽  
Simon Smart ◽  
David K. Wang ◽  
Kaniel Wei Jun Koh ◽  
Kalvin Jiak Chern Ng ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Carbon Footprint ◽  
Membrane Bioreactor ◽  
Forward Osmosis ◽  
Economic Feasibility ◽  
Water Reclamation ◽  
Urban Wastewater ◽  
Potential Applications ◽  
Carbon Footprint Assessment ◽  
Urban Wastewater Treatment

This study systematically explores the potential applications of forward osmosis (FO) membrane based technology in urban wastewater treatment and water reclamation for their techno-economic feasibility and sustainability.

Microalgal bacterial flocs originating from aquaculture wastewater treatment as diet ingredient forLitopenaeus vannamei (Boone)

2014 ◽  
Vol 47 (4) ◽  
pp. 1075-1089 ◽  
Author(s):  
Sofie Van Den Hende ◽  
Leon Claessens ◽  
Eric De Muylder ◽  
Nico Boon ◽  
Han Vervaeren
Keyword(s):  
Wastewater Treatment ◽  
Aquaculture Wastewater

Plant-based versus metal-based coagulants in aquaculture wastewater treatment: Effect of mass ratio and settling time

2021 ◽  
Vol 43 ◽  
pp. 102269
Author(s):  
Azmi Ahmad ◽  
Siti Rozaimah Sheikh Abdullah ◽  
Hassimi Abu Hasan ◽  
Ahmad Razi Othman ◽  
Nur 'Izzati Ismail
Keyword(s):  
Wastewater Treatment ◽  
Treatment Effect ◽  
Settling Time ◽  
Mass Ratio ◽  
Aquaculture Wastewater

Anaerobic treatment of residual lemon pulp in digesters with semi-continuous feed

2013 ◽  
Vol 67 (3) ◽  
pp. 514-520
Author(s):  
A. R. Navarro ◽  
Z. Lopez ◽  
J. Salguero ◽  
M. C. Maldonado
Keyword(s):  
Industrial Waste ◽  
Animal Feed ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Raw Material ◽  
Comparative Tests ◽  
Economic Problems ◽  
The North ◽  
Potential Applications ◽  
Continuous Feed

Lemon growing areas in the north of Argentina have industries that produce concentrated juice, peel and essential oil and generate a significant amount of liquid and solid waste as lemon pulp. In Argentina, despite the potential applications that the pulp has as animal feed and human and industrial raw material, only 10% is used for these purposes and the rest is discarded into the environment causing many ecological and economic problems. There is little information in the literature on biotechnologies for the treatment of this industrial waste. This paper shows that lemon pulp is a suitable substrate to be treated by anaerobic digestion. We obtained 86 and 92% reduction of chemical oxygen demand in a digester with a semi-continuous feed and retention time of 10 and 20 days respectively and a productivity of 0.406 g CH4/g VS h. Comparative tests showed that pre-digesting the pulp improved the process of digestion and increased biogas generation by 20%.

scholarly journals Applications of Microbial β-Mannanases

2020 ◽  
Vol 8 ◽  
Author(s):  
Aneesa Dawood ◽  
Kesen Ma
Keyword(s):  
Catalytic Properties ◽  
Animal Feed ◽  
Plant Tissues ◽  
Degrading Enzymes ◽  
Wide Range ◽  
Potential Applications ◽  
Paper And Pulp ◽  
Main Components ◽  
Temperature Applications

Mannans are main components of hemicellulosic fraction of softwoods and they are present widely in plant tissues. β-mannanases are the major mannan-degrading enzymes and are produced by different plants, animals, actinomycetes, fungi, and bacteria. These enzymes can function under conditions of wide range of pH and temperature. Applications of β-mannanases have therefore, been found in different industries such as animal feed, food, biorefinery, textile, detergent, and paper and pulp. This review summarizes the most recent studies reported on potential applications of β-mannanases and bioengineering of β-mannanases to modify and optimize their key catalytic properties to cater to growing demands of commercial sectors.

scholarly journals Rapid Production of a Novel Al(III) Dependent Bioflocculant Isolated From Raoultella ornithinolytica 160-1 and Its Application Combined With Inorganic Salts

2021 ◽  
Vol 11 ◽  
Author(s):  
Rui Ding ◽  
Laipeng Luo ◽  
Ruixiang Han ◽  
Meiling Zhang ◽  
Tingting Li ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Zeta Potentials ◽  
Ph Tolerance ◽  
Flocculation Activity ◽  
Great Performance ◽  
Wide Range ◽  
Rapid Production ◽  
Potential Applications ◽  
Individual Use ◽  
The Individual

An efficient bioflocculant-producing strain, Raoultella ornithinolytica 160-1, was identified by 16S rRNA and mass spectrometry analyses. Rapid production of bioflocculant EPS-160 was obtained with 10.01 g/(L⋅d) after optimized by response surface methodology. With the aid of Al(III), more than 90% flocculation activity of EPS-160 at 8 mg/L dosage was achieved in 5 min. Thus, this novel Al(III) dependent bioflocculant was used in combined with chemical coagulants AlCl3 to remove kaolin suspensions and wastewater treatment. The results indicated that the addition of EPS-160 in aggregation system not only largely improved the flocculation ability than the individual use of chemical flocculant (over 30 percent), but also overcome the decrease of flocculation activity due to the overdose of AlCl3 and maintained the optimum dosage of AlCl3 in a wide range (11–23 mg/L). The zeta potentials and EPS-160 structure indicated that both charge neutralization and bridging were the flocculation mechanism with kaolin. During the wastewater treatment, this composite flocculants consisted of EPS-160 and AlCl3 also had great performance for turbidity elimination. Moreover, with the properties of high flocculation activity, hyperthermal stability, pH tolerance and non-toxicity, EPS-160 shows great potential applications.

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