Enhancing the Removal of Highly Concentrated CO2 Through Synergism between Microalgae Consortium and Nutrient Ratio in Photobioreactor

2016 ◽  
Vol 10 (3) ◽  
pp. 79-86
Author(s):  
ASTRI RINANTI ◽  
◽  
KANIA DEWI ◽  
Keyword(s):  
Nutrient Ratio

Effect of organic load and nutrient ratio on the operation stability of the moving bed bioreactor for kraft mill wastewater treatment and the incidence of polyhydroxyalkanoate biosynthesis

2012 ◽  
Vol 66 (2) ◽  
pp. 370-376 ◽  
Author(s):  
G. Pozo ◽  
C. A. Villamar ◽  
M. Martínez ◽  
G. Vidal
Keyword(s):  
Wastewater Treatment ◽  
N:P Ratio ◽  
Organic Load ◽  
Moving Bed ◽  
Nutrient Ratio ◽  
Load Rate ◽  
Operation Stability ◽  
Kraft Mill ◽  
Five Phases ◽  
Relationship Of

This paper studies the effect of organic load rate (OLR) and nutrient ratio on operation stability of the moving bed bioreactor (MBBR) for kraft mill wastewater treatment, analyzing the incidence of polyhydroxyalkanoate (PHA) production. The MBBR operating strategy was to increase OLR from 0.25 ± 0.05 to 2.41 ± 0.19 kg COD m−3 d−1 between phases I and IV. The BOD5:N:P ratio (100:5:1 and 100:1:0.2) was evaluated as an operation strategy for phases IV to V. A stable MBBR operation was found when the OLR was increased during 225 days in five phases. The maximum absolute fluorescence against the proportion of cells accumulating PHA was obtained for an OLR of 2.41 ± 0.19 kg COD m−3d−1 and a BOD5:N:P relationship of 100:1:0.2. The increase of PHA biosynthesis is due to the increased OLR and is not attributable to the increased cell concentration, which is maintained constant in stationary status during bioreactor biosynthesis.

The Light: Nutrient Ratio in Lakes: The Balance of Energy and Materials Affects Ecosystem Structure and Process

1997 ◽  
Vol 150 (6) ◽  
pp. 663-684 ◽  
Author(s):  
Robert W. Sterner ◽  
James J. Elser ◽  
Everett J. Fee ◽  
Stephanie J. Guildford ◽  
Thomas H. Chrzanowski
Keyword(s):  
Ecosystem Structure ◽  
Nutrient Ratio

Controlling cyanobacterial blooms by managing nutrient ratio and limitation in a large hyper-eutrophic lake: Lake Taihu, China

2015 ◽  
Vol 27 ◽  
pp. 80-86 ◽  
Author(s):  
Jianrong Ma ◽  
Boqiang Qin ◽  
Pan Wu ◽  
Jian Zhou ◽  
Cheng Niu ◽  
...  
Keyword(s):  
Lake Taihu ◽  
Eutrophic Lake ◽  
Cyanobacterial Blooms ◽  
Nutrient Ratio

Linkages between nutrient ratio and the microbial community in rhizosphere soil following fertilizer management

2020 ◽  
Vol 184 ◽  
pp. 109261 ◽  
Author(s):  
Chunjuan Liu ◽  
Xiangwei Gong ◽  
Ke Dang ◽  
Jing Li ◽  
Pu Yang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Rhizosphere Soil ◽  
Fertilizer Management ◽  
Nutrient Ratio

Altered dietary nutrient intake maintains metabolic homeostasis in parasitized larvae of the insect Manduca sexta L.

2001 ◽  
Vol 204 (23) ◽  
pp. 4065-4080
Author(s):  
S. N. Thompson ◽  
R. A. Redak ◽  
L.-W. Wang
Keyword(s):  
Manduca Sexta ◽  
Nutrient Intake ◽  
Food Selection ◽  
Feeding Period ◽  
Metabolic Homeostasis ◽  
Lower Growth ◽  
Nutrient Ratio ◽  
Dietary Selection ◽  
Dietary Nutrient ◽  
Isocaloric Diets

SUMMARY Manduca sexta larvae exhibited altered food selection over a 2- or 3-day feeding period when parasitized by Cotesia congregata, and offered a choice of two chemically defined diets, one containing casein without sucrose and a second with sucrose but no casein. While normal larvae consumed the diets in a ratio of approximately 2:1 protein:carbohydrate (w/w), parasitized insects consumed a ratio of approximately 1:1. The altered nutrient ratio consumed by parasitized insects was principally due to a decrease in consumption of the protein diet, and was only partially explained by their lower growth. Conditioning larvae for 1 day to either one of the choice diets had little effect on subsequent dietary intake over a 2-day feeding period. Conditioned larvae, regardless of parasitism, initially fed on the opposite diet immediately after conditioning. Although this suggests that the altered nutrient intake displayed by parasitized insects was not due to any failure in their capacity for dietary selection, these results do not definitively demonstrate an altered nutrient intake target by parasitized larvae. Rather, parasitism may compromise dietary selection, resulting in random feeding. When parasitized larvae were maintained on several isocaloric diets with a varying ratio of casein and sucrose, those larvae feeding on the diet with a ratio of 1:1 of these nutrients supported the largest parasite population. Previous investigation of larvae maintained on a single artificial diet established that parasitized insects display an aberrant induction of gluconeogenesis, so that haemolymph trehalose is maintained at a level equivalent to that of normal insects. In contrast, the present results demonstrated that parasitized larvae offered a choice of diets, and feeding at the altered nutrient ratio above, maintain haemolymph sugar but have the same level of gluconeogenesis as normal larvae given the same dietary choice. These investigations suggest that altered food selection by parasitized M. sexta larvae maintains metabolic homeostasis and, moreover, may be adaptive for C. congregata, potentially maximizing the number of parasites developing in a single host larva.

scholarly journals Effects of nutrient supply and nutrient ratio on diversity–productivity relationships of phytoplankton in the Cau Hai lagoon, Vietnam

2019 ◽  
Vol 9 (10) ◽  
pp. 5950-5962 ◽  
Author(s):  
Dang Thi Nhu Y ◽  
Nguyen Tien Hoang ◽  
Pham Khac Lieu ◽  
Hidenori Harada ◽  
Natacha Brion ◽  
...  
Keyword(s):  
Nutrient Supply ◽  
Nutrient Ratio
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