scholarly journals Optimization of Hydraulic Retention Time and Biomass Concentration in Microalgae Biomass Production from Treated Sewage with a Membrane Photobioreactor

2017 ◽  
Vol 15 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Ryo Honda ◽  
Yuta Teraoka ◽  
Mana Noguchi ◽  
Sen Yang
Keyword(s):  
Biomass Production ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Biomass Concentration ◽  
Treated Sewage ◽  
Microalgae Biomass

scholarly journals Effects of Liquid Digestate Treatment on Sustainable Microalgae Biomass Production

2021 ◽  
Author(s):  
Marta Kisielewska ◽  
Marcin Dębowski ◽  
Marcin Zieliński ◽  
Joanna Kazimierowicz ◽  
Piera Quattrocelli ◽  
...  
Keyword(s):  
Growth Medium ◽  
Biomass Production ◽  
Culture Medium ◽  
Culture Media ◽  
Biomass Concentration ◽  
Arthrospira Platensis ◽  
Microalgal Biomass ◽  
Liquid Digestate ◽  
Microalgae Biomass ◽  
High Treatment

AbstractThe aim of the study was to investigate the potential of microalgal cultivation on anaerobic liquid digestate as a growth medium. The two methods of liquid digestate treatment including centrifugation and distillation and the two algal strains (Chlorella vulgaris and Arthrospira platensis) were compared. Additionally, the volume of the liquid digestate used to prepare the culture medium constituted from 10 to 50% of the medium volume. The study demonstrated that the highest C. vulgaris and A. platensis biomass productions of 2490 mg TS/L and 2990 mg/L, respectively, were obtained by adding 50% of distilled digestate to a growth medium. Regarding centrifuged liquid digestate, only 10% dilution was required to obtain the maximum final biomass concentration. A. platensis removed 81.1% and 66.4% of the total nitrogen from medium prepared on distilled and centrifuged digestate, respectively, while C. vulgaris ensured 64.1% and 47.1% of removal, respectively. The phosphorus removal from both culture media was higher than 94.2% with A. platensis, while it was 70.4% from distilled and 87.4% from centrifuged media with C. vulgaris. The study confirmed a great potential of microalgal biomass production on anaerobic liquid digestate with a high treatment efficiency of digestate.

scholarly journals Effect of Hydraulic Retention Time on the Performance of a Compact Moving Bed Biofilm Reactor for Effluent Polishing of Treated Sewage

Water ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 81
Author(s):  
Jamal Ali Kawan ◽  
Fatihah Suja’ ◽  
Sagor Kumar Pramanik ◽  
Arij Yusof ◽  
Rakmi Abdul Rahman ◽  
...  
Keyword(s):  
Water Resource ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Treatment Plant ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Treated Effluent ◽  
Treated Sewage ◽  
Working Volume

Treated effluent from a wastewater treatment plant can be further reused as a water resource for a water supply treatment plant. In this case, the treated sewage gathered in the study of the Class V National Water Quality Standard (NWQS) of Malaysia would be treated for use as a water resource for a water treatment plant. In a moving bed biofilm reactor (MBBR) with a 500-L working volume, organic pollutants, undesirable nutrients, and bacteria were removed without disinfectant. At 24-h hydraulic retention time (HRT), the maximum removal efficiency of 5-day biological oxygen demand, ammonia–nitrogen (NH3-N), and total phosphorus were 71%, 48%, and 12%, respectively. The biofilm thickness, which was captured using scanning electron microscopy, increased from 102.6 μm (24-h HRT) to 297.1 μm (2-h HRT). A metagenomic analysis using 16S rRNA showed an abundance of anaerobic bacteria, especially from the Proteobacteria phylum, which made up almost 53% of the total microbes. MBBR operated at 24-h HRT could improve effluent quality, as its characteristics fell into Class IIA of the NWQS of Malaysia, with the exception of the NH3-N content, which indicated that the effluent needed conventional treatment prior to being reused as potable water.

Longitudinal dispersion and biomass hold-up of anaerobic fluidized bed reactors

1996 ◽  
Vol 34 (5-6) ◽  
pp. 461-468 ◽  
Author(s):  
M. Turan ◽  
I. Öztürk
Keyword(s):  
Fluidized Bed ◽  
Retention Time ◽  
Fluidized Beds ◽  
Hydraulic Retention Time ◽  
Biomass Concentration ◽  
Pulse Response ◽  
Longitudinal Dispersion ◽  
Fluidized Bed Reactors ◽  
Biofilm Growth ◽  
Biological Growth

Longitudinal dispersion in fluidized bed reactors was studied using pulse-response techniques for both clean and anaerobic-biofilm coated media. A large number of experimental data on the longitudinal dispersion and biofilm growth in the anaerobic fluidized bed reactors (AFBRs) were investigated. Some correlations applicable to fluidized beds were obtained for both the hydraulic retention time and the biomass concentration versus the ratio Pe/Re. The biomass concentration tends to zero for a critical retention time in AFBRs. The biological growth in the bed causes an increase of Pe number.

Recycling industrial wastewater for improved carbohydrate-rich biomass production in a semi-continuous photobioreactor: Effect of hydraulic retention time

2021 ◽  
Vol 284 ◽  
pp. 112065
Author(s):  
Ma. Isabel Sánchez-Contreras ◽  
Sandra Morales-Arrieta ◽  
Patrick U. Okoye ◽  
Rosa Angélica Guillén-Garcés ◽  
P.J. Sebastian ◽  
...  
Keyword(s):  
Biomass Production ◽  
Retention Time ◽  
Industrial Wastewater ◽  
Hydraulic Retention Time

The nitrogen removal potential of predenitrification systems in sensitive coastal areas

1995 ◽  
Vol 32 (7) ◽  
pp. 135-142
Author(s):  
E. Görgün ◽  
N. Artan ◽  
D. Orhon ◽  
R. Tasli
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Retention Time ◽  
Treatment Process ◽  
Hydraulic Retention Time ◽  
Domestic Sewage ◽  
Coastal Areas ◽  
Careful Evaluation ◽  
Denitrification Kinetics

Effective nitrogen removal is now required to protect water quality in sensitive coastal areas. This involves a much more difficult treatment process than for conventional domestic sewage as wastewater quantity and quality exhibits severe fluctuations in touristic zones. Activated sludge is currently the most widely used wastewater treatment and may be upgraded as a predenitrification system for nitrogen removal. Interpretation of nitrification and denitrification kinetics reveal a number of useful correlations between significant parameters such as sludge age, C/N ratio, hydraulic retention time, total influent COD. Nitrogen removal potential of predenitrification may be optimized by careful evaluation of wastewater character and the kinetic correlations.

Evaluation of a tropical single-cell waste stabilization pond system for irrigation

1995 ◽  
Vol 31 (12) ◽  
pp. 267-273 ◽  
Author(s):  
B. S. O. Ceballos ◽  
A. Konig ◽  
B. Lomans ◽  
A. B. Athayde ◽  
H. W. Pearson
Keyword(s):  
Single Cell ◽  
Removal Efficiency ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Full Scale ◽  
Waste Stabilization Pond ◽  
North East ◽  
Helminth Eggs ◽  
Waste Stabilization ◽  
Better Than

A single full-scale primary facultative pond in Sapé, north-east Brazil was monitored for performance and efficiency. The pond had a hydraulic retention time of 61 days and achieved a 95% BOD5 removal efficiency and had no helminth eggs in the effluent. The effluent failed to meet the WHO faecal coliform guideline for unrestricted irrigation. The pond was dominated by the cyanobacterium Microcystis and gave better than predicted orthophosphate removal. Details of how the system could be simply upgraded utilizing the same land are discussed.

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