Study on Immobilization Activated Sludge by Polyvinyl Alcohol-sodium Alginate - Calcium Nitrate in Domestic Sewage Treatment

2010 ◽  
Author(s):  
Nie Qian ◽  
Jian Peichao ◽  
Liu Zhibin ◽  
Gu Fang
Keyword(s):  
Polyvinyl Alcohol ◽  
Activated Sludge ◽  
Sodium Alginate ◽  
Sewage Treatment ◽  
Calcium Nitrate ◽  
Domestic Sewage

Post-Denitrification with Controlled Feeding of Activated Sludge as H Donator

1990 ◽  
Vol 22 (7-8) ◽  
pp. 161-170
Author(s):  
I. Sekoulov ◽  
R. Addicks ◽  
J. Oles
Keyword(s):  
Activated Sludge ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Trickling Filter ◽  
Sewage Treatment Plants ◽  
Effluent Quality ◽  
Second Stage ◽  
Denitrification Reactor ◽  
The Given ◽  
Complicated Configuration

Enlargement and/or upgrading of already existing sewage treatment plants will bring problems to design and operation. However, this can be solved even in some complicated configuration of the treatment system, as will be demonstrated. Having an activated sludge system for BOD removal (first stage) followed by a trickling filter for nitrification (second stage), denitrification of the effluent without an external H donator is hard to achieve. In domestic sewage treatment, denitrification is usually carried out with BOD as carbon source. Additionally to the principal question of pre- or post denitrification and the related effects on the effluent quality (BOD, COD, NH4) pre-denitrification in the given case would be highly ineffective and uneconomical (large hydraulic loads). The paper presents a system using thickened sludge from the activated sludge sedimentation as H donator. The sludge has been successfully used to denitrify the trickling filter effluent. For the design of the post-denitrification stage, the necessary volume of sludge could be determined together with the volume of the denitrification reactor. Results of the pilot-plant studies are presented.

scholarly journals Application of biosurfactants for heavy netals leaching from immobilized activated sludge / Zastosowanie biosurfaktantów do wymywania metali ciężkich z immobilizowanego osadu czynnego

2015 ◽  
Vol 41 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Małgorzata Kuczajowska-Zadrożna ◽  
Urszula Filipkowska ◽  
Tomasz Jóźwiak
Keyword(s):  
Heavy Metals ◽  
Critical Micelle Concentration ◽  
Polyvinyl Alcohol ◽  
Activated Sludge ◽  
Sodium Alginate ◽  
Ph Value ◽  
The Other ◽  
The Impact ◽  
Cadmium Zinc

Abstract This study was undertaken to determine the effectiveness of biosurfactants - saponin, tannin and rhamnolipids JBR 515 and 425, for the removal of cadmium, zinc and copper from activated sludge immobilized in 1.5% sodium alginate with 0.5% polyvinyl alcohol. We also established the impact of pH value on biosorbent regeneration with the analyzed biosurfactants and determined the critical micelle concentration (CMC) in solutions containing the biosorbent and biosurfactant and in exact samples with heavy metals. Saponin exhibited the highest effectiveness of metals leaching at pH 1-5, and rhamnosides at pH 5-6. In addition, the study demonstrated a significant effect of the ratio of biosorbent mass to washing agent volume (m/V) on the effectiveness of metals leaching. Of the biosurfactants analyzed, saponin was ca. 100% effective in leaching zinc and copper. The effectiveness of the other biosurfactants was lower and depended on the metal being leached

Fixed Activated Sludge Makes Sewage Treatment Simple

1986 ◽  
Vol 18 (7-8) ◽  
pp. 193-198 ◽  
Author(s):  
A. Mesdaghinia
Keyword(s):  
Activated Sludge ◽  
Suspended Solids ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
High Quality ◽  
Bench Scale ◽  
Sludge Recycling ◽  
The Media

The objective of this research was to conduct a bench scale study of fixed activated sludge treating domestic sewage. Two different units employing diffused aeration with plastic and aluminum media were studied in four separate phases. Data indicated that the system could produce a high quality effluent without any requirements for sludge recycling through the system. Suspended solids concentrations of 3–6 mg/l, BOD5 concentrations of 4 – 12 mg/l and COD concentrations of 35–45 mg/l were found in the effluent with wastewater retentions ranging from 3–15 hours, whereas an indication of nitrification was observed in higher detention periods. As far as the type of media was concerned, the plastic and aluminum media did not differ significantly once the microbes had grown on the media.

Aerobic Biotransformation of14C-Labeled 8-2 Telomer B Alcohol by Activated Sludge from a Domestic Sewage Treatment Plant

2005 ◽  
Vol 39 (2) ◽  
pp. 531-538 ◽  
Author(s):  
Ning Wang ◽  
Bogdan Szostek ◽  
Patrick W. Folsom ◽  
Lisa M. Sulecki ◽  
Vladimir Capka ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Domestic Sewage

Treatment of high-strength ammonium wastewater by polyvinyl alcohol–sodium alginate immobilization of activated sludge

2017 ◽  
Vol 63 ◽  
pp. 214-220 ◽  
Author(s):  
Xiaoyi Xu ◽  
Zhaoxia Jin ◽  
Bin Wang ◽  
Chenpei Lv ◽  
Bibo Hu ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Activated Sludge ◽  
Sodium Alginate ◽  
High Strength ◽  
Alginate Immobilization

Research on domestic sewage treatment by “Activated Sludge” combined “Biofilm”

2015 ◽  
pp. 9-12
Author(s):  
Yan-Ping Li ◽  
Wei Hong ◽  
Yong Li ◽  
Zhen-Bing Wang ◽  
Zhen Han
Keyword(s):  
Activated Sludge ◽  
Sewage Treatment ◽  
Domestic Sewage

scholarly journals Performance evaluation of a large sewage treatment plant in Brazil, consisting of an upflow anaerobic sludge blanket reactor followed by activated sludge

2017 ◽  
Vol 76 (8) ◽  
pp. 2003-2014 ◽  
Author(s):  
Pollyane Diniz Saliba ◽  
Marcos von Sperling
Keyword(s):  
Activated Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Domestic Sewage ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Removal Efficiencies ◽  
Anaerobic Sludge Blanket

The objective of this study was to evaluate the behaviour of a system comprising an upflow anaerobic sludge blanket reactor followed by activated sludge to treat domestic sewage. The Betim Central sewage treatment plant, Brazil, was designed to treat a mean influent flow of 514 L/s. The study consisted of statistical treatment of monitoring data from the treatment plant covering a period of 4 years. This work presents the concentrations and removal efficiencies of the main constituents in each stage of the treatment process, and a mass balance of chemical oxygen demand (COD) and nitrogen. The results highlight the good overall performance of the system, with high mean removal efficiencies: BOD (biochemical oxygen demand) (94%), COD (91%), ammonia (72%) and total suspended solids (92%). As expected, this system was not effective for the removal of nutrients, since it was not designed for this purpose. The removal of Escherichia coli (99.83%) was higher than expected. There was no apparent influence of operational and design parameters on the effluent quality in terms of organic matter removal, with the exceptions of the BOD load upstream of the aeration tank and the sludge age in the unit. Results suggest that this system is well suited for the treatment of domestic sewage.

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