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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20402 - Chemical process engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

Ecological Engineering

ISSN

0925-8574

e-ISSN

1872-6992

Volume of the periodical

120

Issue of the periodical within the volume

September

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

513-521

UT code for WoS article

000444614500055

EID of the result in the Scopus database

2-s2.0-85049788461