scholarly journals Effect of carbon source type on phosphorus removal efficiency of MBBR and characteristics of fluorescent substances in water

2021 ◽  
Vol 2045 (1) ◽  
pp. 012028
Author(s):  
J X Sun ◽  
M Wang ◽  
X Zhang ◽  
Y T Zhang ◽  
C Huang ◽  
...  
Keyword(s):  
Carbon Source ◽  
Phosphorus Removal ◽  
Sodium Acetate ◽  
Treatment Process ◽  
Treatment Efficiency ◽  
Sodium Propionate ◽  
Metabolic Characteristics ◽  
Water Treatment Process ◽  
Source Type ◽  
Microbial Characteristics

Abstract In this paper, Moving Bed Bioreactor (MBBR) reactor was used as the research object to explore the effects of carbon source type on phosphorus removal performance of MBBR system and the changes of microbial metabolic characteristics in typical cycles. The results showed that the absorption and release of phosphorus by sodium propionate and starch were obvious. The accumulation and degradation of PHA and glycogen were observed in the three reactors, and PHA was prior to glycogen decomposition. When sodium acetate was used as carbon source, glycogen decreased during the stationary phase, and the other two did not change significantly. The intensity of fluorescent substances varies greatly with the type of carbon source. The fluorescent substances in the effluent are mainly tyrosine-like and protein-like substances, fulvic acid-like substances and humic acid-like substances. Therefore, the suitable carbon source type should be selected according to the microbial characteristics in the water treatment process to improve the treatment efficiency.

Impact of Different Carbon Sources on Phosphorus Removal in (AO)2SBR System

2014 ◽  
Vol 955-959 ◽  
pp. 231-234
Author(s):  
Hui Yang ◽  
Ji Gang Yang ◽  
Meng Zhao
Keyword(s):  
Carbon Source ◽  
Phosphorus Removal ◽  
Sodium Acetate ◽  
Removal Rate ◽  
Carbon Sources ◽  
Phosphorus Release ◽  
Anoxic Condition ◽  
Biological Phosphorus Removal ◽  
Sodium Propionate ◽  
The Impact

This paper aims to study the impact of different carbon sources on phosphorus removal after the (AO)2SBR system was started successfully. Four kinds of carbon resources were used in sequence experiments to observe the impact of different carbon resources on phosphorus release at anaerobic condition, uptake aerobic condition, uptake anoxic condition and phosphorus removal of the (AO)2SBR system. And the carbon sources are sodium acetate, sodium propionate, glucose, sodium acetate + sodium propionate separately. The experiment result shows that the phosphorus release and uptake of active sludge at anaerobic/aerobic/anoxic condition was preferable with sodium acetate as carbon source. And the phosphorus removal rate of (AO)2SBR system and TP concentration in the effluent were 95% and under 0.5mg·L-1 respectively. The phosphorus removal rate of (AO)2SBR system was only 60% with glucose as carbon resource. This study concluded that it is beneficial for the biological phosphorus removal to choose organics with short carbon chain, such as sodium acetate as carbon source.

scholarly journals Simultaneous Denitrification and Bio-Methanol Production for Sustainable Operation of Biogas Plants

2019 ◽  
Vol 11 (23) ◽  
pp. 6658 ◽  
Author(s):  
I-Tae Kim
Keyword(s):  
Wastewater Treatment ◽  
Carbon Source ◽  
Food Waste ◽  
Treatment Process ◽  
Wastewater Treatment Plants ◽  
Treatment Efficiency ◽  
Wastewater Treatment Process ◽  
Methanol Production ◽  
Sustainable Operation ◽  
Biogas Plants

This study was conducted to secure the sustainability of biogas plants for generating resources from food waste (FW) leachates, which are prohibited from marine dumping and have been obligated to be completely treated on land since 2013 in South Korea. The aim of this study is to reduce the nitrogen load of the treatment process while producing bio-methanol using digested FW leachate diverted into wastewater treatment plants. By using biogas in conditions where methylobacter (M. marinus 88.2%) with strong tolerance to highly chlorinated FW leachate dominated, 3.82 mM of methanol production and 56.1% of total nitrogen (TN) removal were possible. Therefore, the proposed method can contribute to improving the treatment efficiency by accommodating twice the current carried-in FW leachate amount based on TN or by significantly reducing the nitrogen load in the subsequent wastewater treatment process. Moreover, the produced methanol can be an effective alternative for carbon source supply for denitrification in the subsequent process.

scholarly journals The Role of Humic Acid, PP Beads, and pH with Water Backwashing in a Hybrid Water Treatment of Multichannel Alumina Microfiltration and PP Beads

Membranes ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 3 ◽  
Author(s):  
Sungju Hwang ◽  
Yooju Lee ◽  
Jin Yong Park
Keyword(s):  
Humic Acid ◽  
Water Treatment ◽  
Uv Irradiation ◽  
Membrane Fouling ◽  
Treatment Process ◽  
Fouling Resistance ◽  
Treatment Efficiency ◽  
Water Treatment Process ◽  
Inorganic Molecules

Photooxidation oxidizes most organic compounds by mineralizing them to small inorganic molecules. In this study, the effects of dissolved organic matter (DOM), pH, and polypropylene (PP) beads concentration on membrane fouling were investigated in a hybrid water treatment process consisting of seven-channel alumina microfiltration (pore size 1.0 μm) and pure PP beads water backwashing with UV irradiation for photooxidation. The synthetic feed was prepared with humic acid and kaolin and flowed inside the microfiltration (MF) membrane. The permeate contacted the PP beads fluidized in the gap of the membrane and module with outside UV irradiation. Membrane fouling resistance (Rf) increased dramatically with an increase in the concentration of humic acid (HA) from 6 mg/L to 8 mg/L. The treatment efficiency of DOM increased dramatically, from 14.3% to 49.7%, with an increase in the concentration of HA. The Rf decreased with an increase of PP beads concentration. However, maximum permeate volume (VT) was acquired at 5 g/L of PP beads. The maximal treatment efficiency of DOM was 51.3% at 40 g/L of PP beads. The Rf increased with an increase in the pH of feed, and the maximum VT was acquired at a pH of 5. The maximal treatment efficiency of DOM was 52.5% at pH 9.

The Influence of Different Carbon Sources for Polyhydroxyalkanoates Storage

2015 ◽  
Vol 1088 ◽  
pp. 587-590
Author(s):  
Yan Ping Zhang
Keyword(s):  
Carbon Source ◽  
Activated Sludge ◽  
Sodium Acetate ◽  
Carbon Sources ◽  
Dry Weight ◽  
Sodium Propionate ◽  
Cell Content ◽  
Pha Production

The influence of different carbon sources such as glucose, sodium acetate, sodium propionate and ethanol for polyhydroxyalkanoates (PHA) storage were studied in details. It was shown that both the cell content and composition of PHA synthesized by microorganisms in activated sludge were different when different carbon sources were used. PHB (polyhydroxybutyrate) was the main PHA if sodium acetate was used as carbon source, while PHV (polydroxyvalerate) become the main PHA when sodium propionate was used. Sodium acetate and sodium propionate as carbon source had higher PHA production, which reached to 40.89% and 40.96% sludge dry weight, respectively . When ethanol used as carbon source, PHA content was 25.69% sludge dry weight. The minimal PHA storage was 20.14% sludge dry weight when glucose was used.

Denitritation of reject water using primary sludge as organic substrate

2007 ◽  
Vol 2 (1) ◽  
Author(s):  
P. Jenicek ◽  
P. Svehla ◽  
J. Zabranska ◽  
M. Dohanyos ◽  
J. Vondrysova
Keyword(s):  
Water Treatment ◽  
Carbon Source ◽  
Nutrient Removal ◽  
Biological Treatment ◽  
Treatment Process ◽  
Organic Substrate ◽  
Primary Sludge ◽  
Reject Water ◽  
Water Treatment Process ◽  
Biological Methods

The new biological methods of separate reject water treatment became progressive tools to optimization of nutrient removal in wastewater treatment. The method of nitritation and denitritation is one of them. The drawback of the method in comparison with technologies based on autotrophic deammonification is higher requirements for organic substrate. The possibility to suppress the drawback is the use of primary sludge as internal carbon source for denitritation. The experience with such design of separate reject water treatment process is described. The presented results confirm the possibility of efficient, stable and economical removal of nitrogen from reject water by separate biological treatment using nitritation and denitritation process and using primary sludge as the additional carbon source.

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