Contaminants removal characteristics between floc sludge and aerobic granular sludge in domestic sewage treatment at low temperature

2011 ◽  
Author(s):  
Shi Wenxin ◽  
Wang Shuo ◽  
Yi Xuesong ◽  
Yu Shuili ◽  
Jiang Lihui ◽  
...  
Keyword(s):  
Low Temperature ◽  
Sewage Treatment ◽  
Granular Sludge ◽  
Domestic Sewage ◽  
Aerobic Granular Sludge ◽  
Contaminants Removal

scholarly journals Reactivation of hypersaline aerobic granular sludge after low-temperature storage

2017 ◽  
Vol 08 (2) ◽  
pp. 61-70 ◽  
Author(s):  
Yao Chen ◽  
◽  
Jia-Yue Zhu ◽  
Yu Qin ◽  
Zhi-Min Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Low Temperature Storage ◽  
Temperature Storage

scholarly journals Anaerobic treatment of domestic sewage at low temperature

2001 ◽  
Vol 44 (4) ◽  
pp. 33-40 ◽  
Author(s):  
T. Elmitwalli ◽  
Gr. Zeeman ◽  
G. Lettinga
Keyword(s):  
Low Temperature ◽  
Granular Sludge ◽  
Anaerobic Treatment ◽  
Domestic Sewage ◽  
Uasb Reactor ◽  
The Novel ◽  
Reactor Performance ◽  
Batch Tests ◽  
Pre Treatment ◽  
Attached Form

The results of research concerning the feasibility of anaerobic treatment of domestic sewage at low temperature are summarized in this article. The batch tests demonstrated a high biodegradability of domestic sewage at 20°C (74%). Both batch and continuous experiments for the treatment of domestic sewage showed that the removal of SS prior to anaerobic treatment of domestic sewage not only provides a stable reactor performance but also improves the removal of both colloidal (CODcol) and dissolved COD (CODdis). The results of the pre-treatment of domestic sewage in an anaerobic filter (AF) and an anaerobic hybrid (AH) reactor showed that the AF reactor is an efficient process for the removal of suspended COD (CODss), viz. 82%, at an HRT of 4 h and 13°C. The novel AF reactor consists of vertical sheets of reticulated polyurethane foam with knobs, where the biomass was only in attached form. For the treatment of pre-settled sewage at 13°C, the AH reactor, with granular sludge, showed a higher total COD (CODt) removal than the UASB reactor as a result of higher CODcol removal. Therefore, the performance of a two-step system, AF+AH (with granular sludge) reactor, was investigated with different HRTs at 13°C. For optimization of CODss and CODdis an HRT of 4+4 h is needed, while for optimization of CODcol removal an HRT of 4+8 h is required. A CODt removal of 71% was achieved with 60% conversion to methane from the removed CODt when the AF+AH system was operated at an HRT of 4+8 h at 13°C.

Contaminants conversion processes and removal by aerobic granular sludge at low temperature

2008 ◽  
Vol 136 ◽  
pp. S670
Author(s):  
Ruiling Bao ◽  
Shuili Yu ◽  
Jiapei Wu ◽  
Yulan Wang ◽  
Xingtao Zuo
Keyword(s):  
Low Temperature ◽  
Granular Sludge ◽  
Aerobic Granular Sludge

Aerobic Granular Sludge

2017 ◽  
pp. 231-263
Author(s):  
Catarina L. Amorim ◽  
Irina S. Moreira ◽  
Anouk F. Duque ◽  
Mark C. M. van Loosdrecht ◽  
Paula M. L. Castro
Keyword(s):  
System Performance ◽  
Water Discharge ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Compact Structure ◽  
Bacterial Populations ◽  
Industrial Facilities ◽  
Phosphorous Removal ◽  
Contaminants Removal ◽  
Pollutants Removal

Aerobic Granular Sludge (AGS) has been successfully applied for carbon, nitrogen and phosphorous removal from wastewaters, in a single tank, reducing the space and energy requirements. This is especially beneficial for, often space restricted, industrial facilities. Moreover, AGS holds a promise for the toxic pollutants removal, due to its layered and compact structure and the bacteria embedding in a protective extracellular polymeric matrix. These outstanding features contribute to AGS tolerance to toxicity and stability. Strategies available to deal with toxic compounds, namely granulation with effluents containing toxics and bioaugmentation, are addressed here. Different applications for the toxics/micropollutants removal through biosorption and/or biodegradation are presented, illustrating the technology versatility. The anthropogenic substances effects on system performance and bacterial populations established within AGS are also addressed. Combination of contaminants removal to allow water discharge, and simultaneous valuable products recovery are presented as final remark.

Low temperature treatment of domestic sewage in upflow anaerobic sludge blanket and anaerobic hybrid reactors

1999 ◽  
Vol 39 (5) ◽  
pp. 177-185 ◽  
Author(s):  
Tarek A. Elmitwalli ◽  
Marcel H. Zandvoort ◽  
Grietje Zeeman ◽  
Harry Bruning ◽  
Gatze Lettinga
Keyword(s):  
Low Temperature ◽  
Sewage Treatment ◽  
Average Diameter ◽  
Anaerobic Treatment ◽  
Domestic Sewage ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Removal Efficiencies

The treatment of sewage at a temperature of 13°C was investigated in three reactors (each 3.84 litre) a UASB and two anaerobic hybrid (AH) reactors with small sludge granules with an average diameter of 0.73 mm. The media used in the AH reactors were vertical polyurethane foam sheets. The reactors were operated at a HRT of 8 h. The use of small sludge granules and operating the reactors at low upflow velocity (1.8 m/d) improved suspended COD removal efficiencies for the UASB reactor. Moreover, the use of sheets in the AH reactors significantly increased suspended COD removal efficiencies as compared to the UASB and reached to 87% for pre-settled sewage treatment. The treatment of pre-settled sewage instead of raw sewage in AH reactors significantly increased colloidal and dissolved COD removal efficiencies with 13% and 12% respectively and colloidal COD removal efficiency for the UASB reactor with 13%. At ‘steady state’ for pre-settled sewage treatment, the AH reactors removed 64% of the total COD which is significantly higher by 4% than the UASB reactor. Therefore, the anaerobic treatment of domestic sewage at low temperature can be improved by treating pre-settled sewage in shallow AH reactors containing small sludge granules.

Performance of Denitrifying Phosphorus Removal by Aerobic Granular Sludge at Low Temperature

2011 ◽  
Vol 71-78 ◽  
pp. 2966-2969 ◽  
Author(s):  
Rui Ling Bao ◽  
Xiao Ju Yan ◽  
Shui Li Yu
Keyword(s):  
Low Temperature ◽  
Phosphorus Removal ◽  
Film Growth ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Utilization Efficiency ◽  
Aerobic Granular Sludge ◽  
Organic Substrates ◽  
Denitrifying Phosphorus Removal ◽  
Different Types

To deeply understand the performance of denitrifying phosphorus removal by aerobic granular sludge at low temperature, an aerobic granular sludge sequencing batch reactor had been operated at 10±1°C. The results showed that the PHAs components synthesized by phosphorus accumulating organisms (PAOs) in granule sludge were affected by different types of carbon source in anaerobic period, and the release and uptake of phosphate were also influenced. It was indicated that the increased ratio of PHV to PHAs led to the increase of the utilization efficiency of nitrate by denitrification PAOs. When initial COD concentration in anaerobic period was lower than 300mg/L, it can effectively keep organic substrates from flowing into the following anoxic period which influenced the efficiency of denitrifying phosphorus removal. Inhibition of nitrite to denitrifying phosphorus removal was decreased due to biology film growth manner of aerobic granular sludge. The inhibitory concentration of nitrite to denitrifying PAOs was 60 mg/L.

Sign in / Sign up

Export Citation Format

Share Document