Biomass Productivity, Developmental Morphology, and Nutrient Removal Rate of Hybrid Napier Grass (Pennisetum purpureum x Pennisetum americanum) in Response to Potassium and Nitrogen Fertilization in a Multiple-Harvest System

2020 ◽  
Author(s):  
Bhawit Dokbua ◽  
Naroon Waramit ◽  
Jiraporn Chaugool ◽  
Chaisit Thongjoo
Keyword(s):  
Nutrient Removal ◽  
Nitrogen Fertilization ◽  
Removal Rate ◽  
Biomass Productivity ◽  
Napier Grass ◽  
Pennisetum Purpureum ◽  
Pennisetum Americanum ◽  
Developmental Morphology ◽  
Nutrient Removal Rate

scholarly journals High nutrient removal rate from swine wastes and protein biomass production by full-scale duckweed ponds

2012 ◽  
Vol 112 ◽  
pp. 98-104 ◽  
Author(s):  
Rodrigo A. Mohedano ◽  
Rejane H.R. Costa ◽  
Flávia A. Tavares ◽  
Paulo Belli Filho
Keyword(s):  
Biomass Production ◽  
Nutrient Removal ◽  
Removal Rate ◽  
Full Scale ◽  
High Nutrient ◽  
Nutrient Removal Rate

scholarly journals Nannochloropsis oculata D. microalgae growth in a treated effluent from superintensive shrimp cultivation

2015 ◽  
Vol 8 (1) ◽  
Author(s):  
Bruno Menezes Galindro ◽  
Rafael Garcia Lopes ◽  
Roberto Bianchini Derner ◽  
Sebastião Roberto Soares
Keyword(s):  
Nutrient Removal ◽  
Removal Rate ◽  
Stationary Growth Phase ◽  
Nannochloropsis Oculata ◽  
Raw Material ◽  
Treated Effluent ◽  
Microalgae Biomass ◽  
Shrimp Cultivation ◽  
Microalgae Growth ◽  
Nutrient Removal Rate

The use of microalgae biomass in order to obtain lipids is an important alternative to be studied and it has great potential to be applied in order to produce food and biofuel, for instance. However, there are some processes of its production which need further study, such as the cultivation inputs. A possibility for an alternative raw material is the effluent from superintensive shrimp cultivation with bioflocs (BF). Therefore, the objective of this study was to evaluate the productivity and nutrient removal rate of Nannochloropsis oculata cultivation in three systems: (i) f/2 - produced integrally with chemical fertilizers, (ii) BF - using of 100% of the effluent for superintensive shrimp cultivation with bioflocs and (iii) 50/50 – using 50% of shrimp cultivation effluents  and  50% from f/2 system. The microalgae presented greater biomass growth and productitvity in BF system but less lipids and esters accumulation. Concerning nutrient removal, f/2 system showed better performance, which may indicate that the cultivation in BF systems takes longer to reach the stationary growth phase.

Biogas Production from Napier Grass (Pak Chong 1) (Pennisetum purpureum × Pennisetum americanum)

2013 ◽  
Vol 856 ◽  
pp. 327-332 ◽  
Author(s):  
Apiwaj Janejadkarn ◽  
Orathai Chavalparit
Keyword(s):  
Biogas Production ◽  
Oxygen Demand ◽  
Napier Grass ◽  
Pennisetum Purpureum ◽  
Organic Loading Rate ◽  
Pennisetum Americanum ◽  
Biogas Yield ◽  
Volatile Solids ◽  
Working Volume ◽  
Continuously Stirred Tank Reactor

The objective of this research was to evaluate the quantity of biogas production from napier grass (Pak Chong 1) (Pennisetum purpureum × Pennisetum americanum) in three identical continuously stirred tank reactor (CSTRs) at room temperature. The volatile solids feed was varied at 1.5, 2 and 3%, respectively. The organic loading rate was altered at 0.43, 0.57 and 0.86 kg VS/m3.d in CSTR 1, 2 and 3, respectively. Three laboratory scale CSTRs with working volume of 5 l were carried out. The results showed that the optimum volatile solids fraction was 2% VS with maximum biogas production of 0.529 m3/kg VS added. The methane production was achieved at 0.242 m3/kg VS added. Under this condition, the soluble chemical oxygen demand (SCOD) of the hydrolysate was increased by 74% and the SCOD and VS removal efficiency were obtained 52.52% and 55.98%, respectively. The highest total volatile fatty acid was obtained on day 12, which was 5.51 g/l and the highest concentration of HAc was 4.33 g/l. The results indicated that volatile solids fraction was 2% VS achieves a maximum biogas yield and can be successfully converted using anaerobic digestion and was investigated into economical and scalable.

Pilot Scale Study on Biological Nutrient Removal and Membrane Fouling Alleviation in Combined Membrane Bioreactor for Municipal Wastewater Treatment

2011 ◽  
Vol 365 ◽  
pp. 354-360 ◽  
Author(s):  
Shuo Liu ◽  
Ji Fu Wang ◽  
Bao Zhen Wang ◽  
Bing Wang ◽  
Wei Wan
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Biological Nutrient Removal ◽  
Municipal Wastewater Treatment ◽  
Nutrient Removal Rate

To solve the problem of eutrophication in receiving water, a novel Membrane Bioreactor (MBR) with combined configuration was designed for municipal wastewater treatment and reclamation. By dividing bioreactor into three zones, the combined MBR operated under anoxic, anaerobic and aerobic conditions. It provided optimum conditions for nitrification, denitrifying and phosphate accumulating bacterial growth which resulted in high biological nutrient removal rate directly. The operational performance of combined MBR pilot plant showed that it exhibited high nutrient removal rate on Chemical oxygen demand (CODcr), total nitrogen (TN) and total phosphorus (TP). The mean value of effluent CODcr, TN and TP removal rate was 90.63%, 63.05% and 60.51% respectively during 180 days of operation. In order to obtain stable membrane flux, the combined MBR packed with fibrous bio-film carrier and added diatomite. Furthermore, it could alleviate membrane fouling effectively. As a result, the combined MBR improved effluent water quality significantly and alleviated membrane fouling remarkably.

Nitrogen Fertilization of Guinea and Napier Grass (Panicum maximum and Pennisetum purpureum) in Malaysian Oligotrophic Peat

1982 ◽  
Vol 18 (1) ◽  
pp. 73-78
Author(s):  
W. Y. Chew ◽  
K. Ramli ◽  
A. B. A. Majid
Keyword(s):  
Nitrogen Fertilization ◽  
Field Experiments ◽  
Positive Response ◽  
N Uptake ◽  
N Fertilization ◽  
Napier Grass ◽  
Pennisetum Purpureum ◽  
N Recovery ◽  
Panicum Maximum ◽  
Fertilizer N

SUMMARYTwo field experiments studied the nitrogen fertilizer requirements of guinea and napier grass on peat. Plants in the control plots, though optimally limed and fertilized with other nutrients, absorbed only 1.7 and 2.4% of total peat N in a year and N fertilization improved DM yield, with an optimum at 900 kg/ha/yr. Further positive response was not observed, probably because of a reduced ratio of N to other nutrients. Optimum N uptake, and N concentration in the DM, were achieved at 600 kg/ha/yr N but N recovery decreased linearly with increasing fertilizer N at the rate of about 2–4% per 100 kg/ha/yr N.

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