Effects of solids retention time on the biological performance of a novel microalgal-bacterial membrane photobioreactor for industrial wastewater treatment

2021 ◽  
pp. 105500
Author(s):  
Meijia Zhang ◽  
Kam-Tin Leung ◽  
Hongjun Lin ◽  
Baoqiang Liao
Keyword(s):  
Wastewater Treatment ◽  
Retention Time ◽  
Industrial Wastewater ◽  
Bacterial Membrane ◽  
Industrial Wastewater Treatment ◽  
Solids Retention Time ◽  
Solids Retention ◽  
Biological Performance

Electron density-based transformation of trimethoprim during biological wastewater treatment

2012 ◽  
Vol 65 (4) ◽  
pp. 689-696 ◽  
Author(s):  
Taewoo Yi ◽  
William Barr ◽  
W. F. Harper
Keyword(s):  
Wastewater Treatment ◽  
Electron Density ◽  
Retention Time ◽  
Biological Wastewater Treatment ◽  
Hydroxylation Reaction ◽  
Solids Retention Time ◽  
Solids Retention ◽  
Biological Transformation

This research investigated the biological transformation of trimethoprim (TMP). Partial TMP removal was observed in the presence of ammonia and toluene, and increasing the solids retention time from 20 days to 60 days improved TMP removal in both the nitrifying and heterotrophic bioreactors. Two TMP-related metabolites were identified, the first (5-(3,4,5-trimethoxybenzyl) pyrimidine-2,4-diamine, 5-hydroxyl) showing that a hydroxylation reaction took place, and the second (5-(1-carboxyl, 1-methoxy, 5-methoxy 1-,4-pentene) pyrimidine-2,4-diamine, 5-hydroxyl) showing that the trimethoxybenzyl ring was cleaved. This research is the first that we are aware of to report these two TMP-related byproducts. TMP metabolites show that initiating reactions take place where the electron density is highest, and that these initiating reactions shift the electron density of TMP, likely affecting the course of transformation.

scholarly journals Impact of solids retention time on the biological performance of an AnMBR treating lipid-rich synthetic dairy wastewater

2019 ◽  
pp. 1-12 ◽  
Author(s):  
Maria Alejandra Szabo-Corbacho ◽  
Santiago Pacheco-Ruiz ◽  
Diana Míguez ◽  
Christine Maria Hooijmans ◽  
Hector A. García ◽  
...  
Keyword(s):  
Retention Time ◽  
Dairy Wastewater ◽  
Solids Retention Time ◽  
Solids Retention ◽  
Biological Performance

Solids retention time, influent antibiotic concentrations, and temperature as selective pressures for antibiotic resistance in activated sludge systems

2017 ◽  
Vol 3 (5) ◽  
pp. 883-896 ◽  
Author(s):  
Majid Neyestani ◽  
Eric Dickenson ◽  
Jean McLain ◽  
Victoria Obergh ◽  
Oscar Quinones ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Retention Time ◽  
Biological Wastewater Treatment ◽  
Selective Pressures ◽  
Solids Retention Time ◽  
Solids Retention ◽  
Activated Sludge Systems

This paper evaluates changes in antibiotic resistance during biological wastewater treatment.

Wastewater: Solids retention time control in wastewater treatment

2014 ◽  
Vol 51 (3) ◽  
pp. 12-17 ◽  
Author(s):  
Robert Smith ◽  
Sarah Elger ◽  
Scott Mleziva
Keyword(s):  
Wastewater Treatment ◽  
Retention Time ◽  
Time Control ◽  
Solids Retention Time ◽  
Solids Retention

scholarly journals Use of Various Thin-Layer Settling Schemes for Industrial Wastewater Treatment

2021 ◽  
Vol 1 (1) ◽  
pp. 43-50
Author(s):  
Varuzhan Levon Shamyan
Keyword(s):  
Wastewater Treatment ◽  
Thin Layer ◽  
Industrial Wastewater ◽  
Suspended Solids ◽  
Laboratory Studies ◽  
Cross Sectional ◽  
Industrial Wastewater Treatment ◽  
Solids Retention

In this paper, the theoretical preconditions in favor of the use of thin-layer settling tanks for industrial wastewater treatment are substantiated by the corresponding laboratory studies. The data from the results of studies of wastewater treatment of the textile, knitwear and silk industries conducted on laboratory thin-layer settling tanks according to the basic schemes of wastewater supply and precipitating sediment are given. As stated by these data, according to the generally accepted criteria for the effectiveness of suspended solids retention for wastewater of the above-mentioned industries, it is more preferable to use thin-layer sedimentation in a cross-sectional scheme.

Sign in / Sign up

Export Citation Format

Share Document