نتایج جستجو برای: Granular Sludge

تعداد نتایج: 39709  

Journal: :Journal of environmental sciences 2007
Jun Zhou Feng-lin Yang Fan-gang Meng Peng An Di Wang

Aerobic granular sludge was cultivated adopting internal-circulate sequencing batch airlift reactor. The contradistinctive experiment about short-term membrane fouling between aerobic granular sludge system and activated sludge system were investigated. The membrane foulants was also characterized by Fourier transform infrared (FTIR) spectroscopy technique. The results showed that the aerobic g...

Journal: :international journal of environmental research 2015
m. p. shah

the main theme to conduct present research work was to evaluate the effect of anaerobic granular sludge in degradation of two azo dyes. the study was evaluated in batch experiments where anaerobic and aerobic conditions were integrated by exposing anaerobic granular sludge to oxygen. under these conditions, the azo dyes were reduced, resulting in a temporal accumulation of aromatic amines. subs...

2015
Vidya Singh

To monitor the granularity of anaerobic sludge, the determination of granule density is vital importance. Granular sludge is the key factor for the efficient operation of upflow anaerobic sludge blanket (UASB) reactor. For this reason several techniques have been proposed. In the proposed algorithm, the granular density was calculated. The granular density was strongly correlated with the VSS/T...

Journal: :Water research 2014
Huajun Feng Yangcheng Ding Meizhen Wang Guanglan Zhou Xin Zheng Hongzhen He Xueqin Zhang Dongsheng Shen Jiali Shentu

Quorum sensing is a concentration-sensing mechanism that plays a vital role in sludge granulation. In this study, the regularities of distribution of different signal molecules, including intra- and interspecific signal molecules (diffusible signal factor, DSF), interspecific signal molecules (autoinducter-2, AI-2) and intraspecific signal molecules (acyl-homoserine lactones, AHLs), from three ...

Journal: :international journal of environmental research 2012
t. onodera s. sase p. choeisai w. yoochatchaval h. sumino

a combination of an acidification reactor and an up-flow staged sludge bed (ussb) reactor wasapplied to treatment of molasses wastewater. the ussb, equipped with three gas solid separators, wasselected because of superior organic removal by means of good retention of granular sludge. the combinedsystem was continuously operated at mesophilic (35°c) conditions for 600 days. the ussb achieved a h...

2009

A lab-scale expanded granular sludge bed (EGSB) reactor was operated at 20°C with low strength wastewater (0.6-0.8 g COD/L) for over 200 days. Reactor was inoculated with mesophilic granular sludge. The up-flow velocity was set to 5 m/h by effluent recirculation. The COD loading was increased up to 12 kg COD/m3/day until the day 76, resulting in hydraulic retention time of 1.5 hours. Physical p...

2017
Yanan Ren Fernanda Ferraz Abbass Jafari Kang Qiuyan Yuan

Background Aerobic granular sludge has become an attractive alternative to the conventional activated sludge due to its high settling velocity, compact structure, and higher tolerance to toxic substances and adverse conditions. Aerobic granular sludge process has been studied intensively in the treatment of municipal and industrial wastewater. However, information on leachate treatment using ae...

Journal: :Journal of environmental management 2016
Santo Fabio Corsino Marco Capodici Michele Torregrossa Gaspare Viviani

This work aims to investigate the stability of aerobic granular sludge in the long term, focusing on the clogging of the granular sludge porosity exerted by the extracellular polymeric substances (EPSs). The effects of different cycle lengths (short and long-term cycle) on the granular sludge stability were investigated. Results obtained outlined that during the short duration cycle, the format...

Journal: :international journal of environmental research 0
t. onodera center for regional environmental research, national institute for environmental studies, ibaraki 305-8506, japan s. sase center for regional environmental research, national institute for environmental studies, ibaraki 305-8506, japan- department of civil and environmental engineering, nagaoka university of technology, niigata 940-2188, japan p. choeisai department of environmental engineering, khon kaen university, khon kaen 40002, thailand w. yoochatchaval department of environmental engineering, king mongkut’s university of technology thonburi, thailand h. sumino department of civil engineering, gifu national college of technology, gifu 501-0495, japan t. yamaguchi department of civil and environmental engineering, nagaoka university of technology, niigata 940-2188, japan y. ebie

a combination of an acidification reactor and an up-flow staged sludge bed (ussb) reactor wasapplied to treatment of molasses wastewater. the ussb, equipped with three gas solid separators, wasselected because of superior organic removal by means of good retention of granular sludge. the combinedsystem was continuously operated at mesophilic (35°c) conditions for 600 days. the ussb achieved a h...

Journal: :Biotechnology and bioengineering 2004
A L Amaral M A Pereira M da Motta M-N Pons M Mota E C Ferreira M M Alves

Image analysis techniques are applied to monitor the morphological changes in granular sludge present in an expanded granular sludge blanket (EGSB) reactor fed with oleic acid. Deterioration of granular sludge was monitored along the trial period by measuring the percentage of aggregates smaller than 1 mm (in terms of Feret diameter) either in terms of projected area or in terms of number of ag...

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