A comprehensive study on modified-pillared clays as an adsorbent in wastewater treatment processes

Биологический метод очистки сточных вод представляет собой сложный многокомпонентный процесс, ключевой составляющей которого является работа ферментной системы. Известно, что одним из важнейших ферментов, обеспечивающих биологический процесс, являются дегидрогеназы. Полностью сложнейший механизм действия ферментов до конца пока не раскрыт, однако в практике контроля процессов биологической очистки используется показатель дегидрогеназной активности ила. Результаты исследований позволили дополнить имеющуюся информацию фактическими данными о взаимообусловленности уровня дегидрогеназной активности ила и показателей отдельных технологических параметров биологической очистки. Показано, что режим работы аэротенков (нагрузка на ил, доза активного ила и др.) и величина показателей исходной дегидрогеназной активности и дегидрогеназной активности этого же образца ила со слабо концентрированным раствором (ДАИН2О) связаны между собой и зависят от нагрузки на ил по органическим веществам. Полученные результаты исследования могут быть использованы для контроля биологического процесса очистки сточных вод.The biological method of wastewater treatment is a comprehensive multicomponent process the activities of the enzyme system being the key component of it. It is known that dehydrogenases have been one of the most important enzymes the ensure the biological process. The complicated mechanism of the action of enzymes has not been fully described so far however, in the practice of monitoring biological treatment processes, an indicator of the dehydrogenase activity of sludge is used. The research results provided for supplementing the available information with actual data on the interdependence of the level of dehydrogenase activity of sludge and indicators of individual process parameters of biological treatment. It was shown that the mode of operation of aeration tanks (organic matter load on sludge, dose of activated sludge, etc.) and the values of the initial dehydrogenase activity and dehydrogenase activity of the same sludge sample with weakly concentrated solution (DASН2О) are interconnected and depend on the organic load on sludge. The results of the study can be used to control the biological process of wastewater treatment.The biological method of wastewater treatment is a comprehensive multicomponent process the activities of the enzyme system being the key component of it. It is known that dehydrogenases have been one of the most important enzymes the ensure the biological process. The complicated mechanism of the action of enzymes has not been fully described so far however, in the practice of monitoring biological treatment processes, an indicator of the dehydrogenase activity of sludge is used. The research results provided for supplementing the available information with actual data on the interdependence of the level of dehydrogenase activity of sludge and indicators of individual process parameters of biological treatment. It was shown that the mode of operation of aeration tanks (organic matter load on sludge, dose of activated sludge, etc.) and the values of the initial dehydrogenase activity and dehydrogenase activity of the same sludge sample with weakly concentrated solution (DASН2О) are interconnected and depend on the organic load on sludge. The results of the study can be used to control the biological process of wastewater treatment.

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Evaluation of QSPR Techniques for Wastewater Treatment Processes

Water Intelligence Online ◽

10.2166/9781843393344 ◽

2010 ◽

Vol 9 ◽

Author(s):

Eric R.V. Dickenson

Keyword(s):

Wastewater Treatment ◽

Treatment Processes

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Fate of Pharmaceuticals and Personal Care Products Through Wastewater Treatment Processes

Water Intelligence Online ◽

10.2166/9781780403830 ◽

2015 ◽

Vol 6 (0) ◽

pp. 9781780403830-9781780403830

Author(s):

R. Stephenson

Keyword(s):

Wastewater Treatment ◽

Personal Care Products ◽

Personal Care ◽

Treatment Processes

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Biofilm Structure – An Important and Neglected Parameter in Waste Water Treatment

Water Science & Technology ◽

10.2166/wst.1989.0283 ◽

1989 ◽

Vol 21 (8-9) ◽

pp. 805-814 ◽

Cited By ~ 15

Author(s):

F. R. Christensen ◽

G. Holm Kristensen ◽

J. la Cour Jansen

Keyword(s):

Wastewater Treatment ◽

Structural Changes ◽

Waste Water Treatment ◽

Experimental Investigations ◽

Biofilm Reactors ◽

Substrate Removal ◽

Treatment Processes ◽

Laboratory Reactor ◽

Biofilm Structure ◽

Kinetics Of

Experimental investigations on the kinetics of wastewater treatment processes in biofilms were performed in a laboratory reactor. Parallel with the kinetic experiments, the influence of the biofilm kinetics on the biofilm structure was studied at macroscopic and microscopic levels. The close interrelationship between biofilm kinetics and structural changes caused by the kinetics is illustrated by several examples. From the study, it is evident that the traditional modelling of wastewater treatment processes in biofilm reactors based on substrate removal kinetics alone will fail in many cases, due to the inevitable changes in the biofilm structure not taken into consideration. Therefore design rules for substrate removal in biofilms used for wastewater treatment must include correlations between the removal kinetics and the structure and development of the biological film.

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VOC Fate Model Verification at Multiple Pulp Mill Wastewater Treatment Sites

Water Science & Technology ◽

10.2166/wst.1992.0420 ◽

1992 ◽

Vol 26 (1-2) ◽

pp. 407-415 ◽

Cited By ~ 4

Author(s):

D. A. Barton ◽

J. J. McKeown ◽

W. Chudyk

Keyword(s):

Wastewater Treatment ◽

Paper Industry ◽

Pulp Mill ◽

Pulp And Paper Industry ◽

Model Verification ◽

Initial Model ◽

Gas Sampling ◽

Treatment Processes ◽

Fate Model

A model of organic compound removal by biological wastewater treatment processes receiving pulp and paper industry wastewaters has been developed and initial model verification performed at a single mill site. This paper presents the results of further model verification conducted at multiple mill sites, including replication of the original site. In addition, VOC losses at other unit processes are quantified. Activated sludge basin chloroform volatilization rates are predicted to within twelve percent of the measured rates. Predicted overall methanol removals are consistent with observed removals although difficulties encountered during off-gas sampling preclude determination of the extent of removal due to volatilization.

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Rapid determination of fractal structure of bacterial assemblages in wastewater treatment: implications to process optimisation

Water Science & Technology ◽

10.2166/wst.1998.0092 ◽

1998 ◽

Vol 38 (2) ◽

pp. 9-15 ◽

Cited By ~ 3

Author(s):

J. Guan ◽

T. D. Waite ◽

R. Amal ◽

H. Bustamante ◽

R. Wukasch

Keyword(s):

Wastewater Treatment ◽

Fractal Structure ◽

Structural Information ◽

Rapid Determination ◽

Fractal Dimensions ◽

Structure Information ◽

Treatment Processes ◽

On Line ◽

Bacterial Aggregates

A rapid method of determining the structure of aggregated particles using small angle laser light scattering is applied here to assemblages of bacteria from wastewater treatment systems. The structure information so obtained is suggestive of fractal behaviour as found by other methods. Strong dependencies are shown to exist between the fractal structure of the bacterial aggregates and the behaviour of the biosolids in zone settling and dewatering by both pressure filtration and centrifugation methods. More rapid settling and significantly higher solids contents are achievable for “looser” flocs characterised by lower fractal dimensions. The rapidity of determination of structural information and the strong dependencies of the effectiveness of a number of wastewater treatment processes on aggregate structure suggests that this method may be particularly useful as an on-line control tool.

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