Nutrient removal from agricultural run-off in demonstrative full scale tubular photobioreactors for microalgae growth

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00322320" target="_blank" >RIV/68407700:21220/18:00322320 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0925857418302404#" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925857418302404#</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ecoleng.2018.07.002" target="_blank" >10.1016/j.ecoleng.2018.07.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nutrient removal from agricultural run-off in demonstrative full scale tubular photobioreactors for microalgae growth

Popis výsledku v původním jazyce

The objective of this paper is to present the design, construction and operation of 3 full scale semi-closed, horizontal tubular photobioreactors used to remove nutrients of a mixture of agricultural run-off and treated domestic wastewater. PBRs were located outdoor and have 2 paddlewheels to ensure the movement of the mixed liquor. The microalgal biomass produced in the PBRs was harvested in a static lamella settling tank in which a polyaluminium chloride coagulant is applied. Each PBR treated in average 2.3 m3/d, being the actual mean hydraulic retention time 5 d. PBRs were submitted to strong seasonal changes regarding solar radiation and temperature, which had a direct impact in the activity of microalgae and the efficiency of the system. Higher mixed liquor pH values were registered in summer. These high values were not observed in the effluents because the system was designed to discharge the mixed liquor only at the end of night, when pH reached the lowest daily values. Most of the influent and effluent nitrogen content was inorganic, and in the form of nitrate. Most of the influent and effluent phosphorus content was in the form of orthophosphate. Influent average was 0.62 mg P/L, but with great variations and in a considerable number of samples not detected. Removal efficiency (when influent values were detected) was very high during all the study, usually greater than 95%, and there were not clear seasonal trends for efficiency as observed for TIN. Volumetric biomass production greatly changed between seasons with much lower values in winter than in summer. Biomass separation efficiency of the settler was very good in either terms of turbidity and total suspended solids. Overall this study demonstrated the reliable and good effectiveness of microalgae based technologies such as the PBR to remove nutrients at a full scale size.

Název v anglickém jazyce

Nutrient removal from agricultural run-off in demonstrative full scale tubular photobioreactors for microalgae growth

Popis výsledku anglicky

The objective of this paper is to present the design, construction and operation of 3 full scale semi-closed, horizontal tubular photobioreactors used to remove nutrients of a mixture of agricultural run-off and treated domestic wastewater. PBRs were located outdoor and have 2 paddlewheels to ensure the movement of the mixed liquor. The microalgal biomass produced in the PBRs was harvested in a static lamella settling tank in which a polyaluminium chloride coagulant is applied. Each PBR treated in average 2.3 m3/d, being the actual mean hydraulic retention time 5 d. PBRs were submitted to strong seasonal changes regarding solar radiation and temperature, which had a direct impact in the activity of microalgae and the efficiency of the system. Higher mixed liquor pH values were registered in summer. These high values were not observed in the effluents because the system was designed to discharge the mixed liquor only at the end of night, when pH reached the lowest daily values. Most of the influent and effluent nitrogen content was inorganic, and in the form of nitrate. Most of the influent and effluent phosphorus content was in the form of orthophosphate. Influent average was 0.62 mg P/L, but with great variations and in a considerable number of samples not detected. Removal efficiency (when influent values were detected) was very high during all the study, usually greater than 95%, and there were not clear seasonal trends for efficiency as observed for TIN. Volumetric biomass production greatly changed between seasons with much lower values in winter than in summer. Biomass separation efficiency of the settler was very good in either terms of turbidity and total suspended solids. Overall this study demonstrated the reliable and good effectiveness of microalgae based technologies such as the PBR to remove nutrients at a full scale size.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ecological Engineering

ISSN

0925-8574

e-ISSN

1872-6992

Svazek periodika

120

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

513-521

Kód UT WoS článku

000444614500055

EID výsledku v databázi Scopus

2-s2.0-85049788461