scholarly journals Excess Sludge Reduction and Biomass Characteristics in Swim-Bed Wastewater Treatment Process

2007 ◽  
Vol 43 (2) ◽  
pp. 73-82
Author(s):  
YINGJUN CHENG ◽  
DAISUKE YAZAKI ◽  
SEN QIAO ◽  
YUSUKE WATANABE ◽  
TOICHIRO KOYAMA ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Wastewater Treatment Process ◽  
Excess Sludge Reduction

Investigation into cyclic utilization of carbon source in an advanced sludge reduction, inorganic solids separation, phosphorus recovery, and enhanced nutrient removal (SIPER) wastewater treatment process

2015 ◽  
Vol 72 (9) ◽  
pp. 1628-1634
Author(s):  
Peng Yan ◽  
Fang-Ying Ji ◽  
Jing Wang ◽  
You-Peng Chen ◽  
Yu Shen ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Treatment Process ◽  
Phosphorus Recovery ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Wastewater Treatment Process ◽  
Inorganic Solids ◽  
Cyclic Utilization ◽  
Solids Separation

An advanced wastewater treatment process (SIPER) was developed to simultaneously reduce sludge production, prevent the accumulation of inorganic solids, recover phosphorus, and enhance nutrient removal. The ability to recover organic substance from excess sludge to enhance nutrient removal (especially nitrogen) and its performance as a C-source were evaluated in this study. The chemical oxygen demand/total nitrogen (COD/TN) and volatile fatty acids/total phosphorus (VFA/TP) ratios for the supernatant of the alkaline-treated sludge were 3.1 times and 2.7 times those of the influent, respectively. The biodegradability of the supernatant was much better than that of the influent. The system COD was increased by 91 mg/L, and nitrogen removal was improved by 19.6% (the removal rate for TN reached 80.4%) after the return of the alkaline-treated sludge as an internal C-source. The C-source recovered from the excess sludge was successfully used to enhance nitrogen removal. The internal C-source contributed 24.1% of the total C-source, and the cyclic utilization of the system C-source was achieved by recirculation of alkaline-treated sludge in the sludge reduction, inorganic solids separation, phosphorus recovery (SIPER) process.

Application of vibration milling for advanced wastewater treatment and excess sludge reduction

2012 ◽  
Vol 65 (1) ◽  
pp. 142-148 ◽  
Author(s):  
Akira Sano ◽  
Akira Senga ◽  
Hiroshi Yamazaki ◽  
Hiroki Inoue ◽  
Kai-Qin Xu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Ball Mill ◽  
Biological Treatment ◽  
Sludge Reduction ◽  
Wastewater Treatment Process ◽  
Treatment Tank ◽  
Excess Sludge Reduction ◽  
Activated Sludge Processes ◽  
Vibration Milling

As a new sludge reduction technology with a phosphorus removal mechanism, a vibration milling technology that uses iron balls have been applied to the wastewater treatment process. Three anaerobic–aerobic cyclic activated sludge processes: one without sludge disintegration; one disintegrated sludge by ozonation; and the other disintegrated sludge with the vibrating ball mill were compared. Ozonation achieved the best sludge reduction performance, but milling had the best phosphorus removal. This is because iron was mixed into the wastewater treatment tank due to abrasion of the iron balls, leading to settling of iron phosphates. Thus, the simple means of using iron balls as the medium in a vibrating ball mill can achieve both a sludge reduction of half and excellent phosphorus removal. Material balances in the processes were calculated and it was found that carbon components in disintegrated sludge were more resistant to biological treatment than nitrogen.

Biological wastewater treatment by a bioreactor with repeated coupling of aerobes and anaerobes aiming at on-site reduction of excess sludge

2006 ◽  
Vol 53 (9) ◽  
pp. 71-77 ◽  
Author(s):  
Anfeng Yu ◽  
Quan Feng ◽  
Zehua Liu ◽  
Yunan Zhou ◽  
Xin-Hui Xing
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Removal Rate ◽  
Settling Tank ◽  
Technological Innovations ◽  
Biological Wastewater Treatment ◽  
Excess Sludge ◽  
Wastewater Treatment Process ◽  
Complex Microbial Community ◽  
Continuous Running

Activated sludge has been widely used in wastewater treatment throughout the world. However, the biggest disadvantage of this method is the by-production of excess sludge in a large amount, resulting in difficulties in operation and high costs for wastewater treatment. Technological innovations for wastewater treatment capable of reducing excess sludge have thus become research topics of interest in recent years. In our present research, we developed a new biological wastewater treatment process by repeated coupling of aerobes and anaerobes (rCAA) to reduce the excess sludge during the treatment of wastewater. During 460-day continuous running, COD (300–700 mg/L) and TOC (100–350 mg/L) were effectively removed, of which the removal rate was above 80 and 90%, respectively. SS in the effluent was 13 mg/L on average in the rCAA bioreactor without a settling tank. The on-site reduction of the excess sludge in the rCAA might be contributed by several mechanisms. The degradation of the grown aerobes after moving into the anaerobic regions was considered to be one of the most important factors. Besides, the repeatedly coupling of aerobes and anaerobes could also result in a complex microbial community with more metazoans and decoupling of the microbial anabolism and catabolism.

A strategy in wastewater treatment process for significant reduction of excess sludge production

2002 ◽  
Vol 45 (12) ◽  
pp. 127-134 ◽  
Author(s):  
N. Shiota ◽  
A. Akashi ◽  
S. Hasegawa
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Pilot Scale ◽  
Aeration Tank ◽  
Excess Sludge ◽  
Wastewater Treatment Process ◽  
Conventional Activated Sludge ◽  
New Process ◽  
Treatment Step ◽  
Sludge Production

A novel wastewater treatment process (S-TE PROCESS®) with significantly reduced production of excess sludge has been developed. The process consists of two different stages, one for a biological wastewater treatment and the other for a thermophilic aerobic digestion of the resulting sludge. A portion of return sludge from the wastewater treatment step is injected into a thermophilic aerobic sludge digester (TASD), in which the injected sludge is solubilized by the action of thermophilic aerobic bacteria. The solubilized sludge is returned to the aeration tank in the wastewater treatment step for its further degradation. Pilot-scale facilities of the S-TE process and the conventional activated sludge process as a control, both treating the same industrial wastewater, were comparatively operated for totally 270 days. As a result, 93% reduction in overall excess sludge production was achieved in the S-TE operation. The SS solubilization rate in TASD was stable at around 30%. Only a slight increase in the effluent SS and TOC concentrations was observed compared with those of the control facility. Otherwise the removal efficiency of TOC was approximately 95% for both plants. A full-scale plant treating domestic sewage was operated for three years, showing 75% reduction of overall excess sludge production. It was concluded that the new process was feasible.

scholarly journals In situ excess sludge reduction in SBBR through uncoupling of metabolism induced by novel aeration modes

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 29058-29064 ◽  
Author(s):  
Benzhou Gong ◽  
Yingmu Wang ◽  
Jiale Wang ◽  
Yanyan Dou ◽  
Jian Zhou
Keyword(s):  
Wastewater Treatment ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Triangular Wave ◽  
Square Wave ◽  
Sawtooth Wave ◽  
Bench Scale ◽  
Biofilm Reactors ◽  
Excess Sludge Reduction

To minimize sludge yield (Yobs) in bench-scale sequencing batch biofilm reactors (SBBRs) during wastewater treatment, novel aeration modes were employed: triangular-wave aeration, square-wave aeration, sawtooth-wave aeration and continuous aeration.

Advanced sewage treatment process with excess sludge reduction and phosphorus recovery

2005 ◽  
Vol 39 (5) ◽  
pp. 902-910 ◽  
Author(s):  
W. Saktaywin ◽  
H. Tsuno ◽  
H. Nagare ◽  
T. Soyama ◽  
J. Weerapakkaroon
Keyword(s):  
Treatment Process ◽  
Sewage Treatment ◽  
Phosphorus Recovery ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Excess Sludge Reduction

Progress and Perspectives of Microfauna as a Powerful Method for Excess Sludge Reduction in Wastewater Treatment

2012 ◽  
Vol 446-449 ◽  
pp. 2824-2828 ◽  
Author(s):  
Li Min Zhao ◽  
Sen Wen
Keyword(s):  
Wastewater Treatment ◽  
Environmental Economic ◽  
Sewage Sludge ◽  
Operating Conditions ◽  
Sludge Reduction ◽  
Powerful Method ◽  
Excess Sludge ◽  
Excess Sludge Reduction

Disposal of sewage sludge by environmentally acceptable means is a serious problem, due to environmental, economic, social and legal factors. This paper presents an overview of the potential of the application of the microfauna, such as the aquatic worms and the earthworms in excess sludge reduction in wastewater treatment. Significant sludge reduction was achieved in the presence of the aquatic worms or the earthworms. Additionally, the effect of operating conditions on the excess sludge reduction by the aquatic worms and the earthworms are also presented.

Sign in / Sign up

Export Citation Format

Share Document