scholarly journals Development of Rotary Magnetoferrite Treatment with Stirrers for Waste Water Treatment Plants to Reduce Excess Sludge

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
Mahmudul Kabir ◽  
Masafumi Suzuki ◽  
Noboru Yoshimura
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Permanent Magnets ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Excess Sludge ◽  
New Approach ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants ◽  
The Relationship

A large amount of excess sludge is being produced in the waste water treatment plants (WWTPs), which is a serious problem in terms of economical and environmental problems. So, the experiments on reduction of excess sludge are carried out. We have introduced a new approach for reduction of excess sludge by using ferrite particles and permanent magnets. A rotary treatment plant was introduced which showed good possibilities of this method for application in the WWTPs. Stirrers hold a very important role in rotary magnetoferrite treatment as they directly get in touch with ferrite particles and sludge. In this paper, we have shown the relationship between the ferrite particles and stirrers. Again, the treatment was carried out for different amounts of activated sludge which shows that the smaller the amount, the better the treatment of sludge. This knowledge may pave the way for the reduction of excess sludge in WWTPs in practical fields.

Feasibility of treatment of low polluted waste water in municipal waste water treatment plants

1997 ◽  
Vol 35 (10) ◽  
pp. 73-78 ◽  
Author(s):  
Harry L. Dorussen ◽  
Wilfried B. A. Wassenberg
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Simulation Models ◽  
Water Treatment Plant ◽  
Municipal Waste ◽  
Waste Water Treatment Plant ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants

In many cases municipal waste water treatment plants receive considerable amounts of low polluted waste water like pretreated industrial waste water, polluted ground water etc. It is not known to what extent treatment of this type of waste water in a municipal waste water treatment plant is feasible with regard to environmental effects and costs. In this paper the effects of this type of waste water on the removal efficiencies of nitrogen, heavy metals and organic micropollutants have been described and costs have been given to prevent an increase of emission loads. For an estimation of the effects on the emission loads simulation models have been used. For an existing oxidation system with a relatively high amount of low polluted waste water simulation runs have been made for situations with and without low polluted waste water. On basis of the results of this case study a system has been developed for the assessment of the feasibility of treatment of low polluted waste water in a municipal waste water treatment plant.

Upgrading of waste-water treatment plants for the biological nitrogen elimination by the injection of on-line prepared mixed cultures

1994 ◽  
Vol 29 (12) ◽  
pp. 129-138 ◽  
Author(s):  
Margarete Glancer ◽  
Siniša Ban ◽  
Vice Soljan ◽  
Imre Pascik
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Mixed Culture ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Mixed Cultures ◽  
Waste Water Treatment Plant ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants ◽  
On Line

By mixing of defined single bacterial and yeast strains with known biokinetic and growth properties, it is possible to prepare various efficient designed mixed cultures for the biodegradation of defined persistent substances and their derivatives. Preparing the mixed cultures on line in separate propagators and enriching the activated sludges semi-continuously by injection of the mixed culture into the activated sludge reactor it is possible to improve the biodegradation efficiency of waste water treatment plants. Applying this technology in a cokery effluents treating plant designed for the removal of COD and phenols, additionally to an improved COD-removal it succeeded in establishing a very efficient nitrification. Injecting a mixed culture, containing oxygen tolerant denitrifying strains into the municipal waste water treatment plant of Salzburg it was possible to establish a simultaneous nitrification and denitrification under aerobic conditions

Calibrating simple models for mixing and flow propagation in waste water treatment plants

1999 ◽  
Vol 39 (4) ◽  
pp. 61-69 ◽  
Author(s):  
Bob De Clercq ◽  
Filip Coen ◽  
Bart Vanderhaegen ◽  
Peter A. Vanrolleghem
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Conventional Activated Sludge ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants ◽  
Flow Propagation

Mathematical models are useful tools in the prediction of system responses to operational changes in waste water treatment plants (WWTPs). The tanks-in-series model is one of the widespread hydraulic models in waste water treatment. This study shows the applicability of the mentioned model. Next to the mixing of substrate in a conventional activated sludge system, an oxidation ditch and a trickling filter, also the flow propagation in a waste water treatment plant was modelled. These different full-scale examples taken from waste water treatment demonstrate the relative ease of model configuration and calibration. Difficulties like experimental design, modelling the diffusion in biofilms and transients in flow rate were encountered.

scholarly journals Evaluation of Waste Water Treatment Units Located at Different Parts of Nepal

2012 ◽  
Vol 12 ◽  
pp. 201-210 ◽  
Author(s):  
Janardan Lamichhane ◽  
Bimal B Upadhyaya ◽  
Nishant Chalise ◽  
Sudeep Makaju
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Removal Efficiency ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Household Waste ◽  
Water Runoff ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants ◽  
Reed Bed

Sewage including liquids from household waste to industry and commerce effluent along with storm water runoff carries various contaminants including soil particles, heavy metals, organic compounds, animals waste, oils and grease which are required to be treated before they are discharged directly to the water into waterways. Various waste water treatment plants established in different part of Nepal include small to large scale treatment of waste discharge. The evaluation of all those plants by scientific mean was carried out for the recommend of standard of treatment plant suitable to the country. Among the plants under study, removal efficiency of TSS, TDS and TS was found highest in KU reed bed systems with 97.5, 74.3 and 95.6% respectively. Similarly, removal efficiency of chemical compounds such as NH3, N2, NO3 2-, Cl-, PO3 2- and COD were found highest in KU and DH reed bed system ranging from 98 to 33.3 % whereas BOD was found highest, 93.1 and 82.1% in HIDWTP and BASP respectively. pH and conductivity measurement and comparison indicates the requirement of continuous use and maintenance of the plant. This could be one of the major ways to inform the government about the maintenance, sustainability and importance of ongoing operation of waste water treatment plants of Nepal in cost effective manner.DOI: http://dx.doi.org/10.3126/njst.v12i0.6500 Nepal Journal of Science and Technology 12 (2011) 201-210

scholarly journals Integration of Cleaner Production and Waste Water Treatment on Tofu Small Industry for Biogas Production using AnSBR Reactor

2018 ◽  
Vol 31 ◽  
pp. 03010
Author(s):  
Suparni Setyowati Rahayu ◽  
Budiyono Budiyono ◽  
Purwanto Purwanto
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Biogas Production ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Limited Area ◽  
Clean Production ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants ◽  
Small Industry

A research on developing a system that integrates clean production and waste water treatment for biogas production in tofu small industry has been conducted. In this research, tofu waste water was turned into biogas using an AnSBR reactor. Mud from the sewage system serves as the inoculums. This research involved: (1) workshop; (2) supervising; (3) technical meeting; (4) network meeting, and (5) technical application. Implementation of clean production integrated with waste water treatment reduced the amount of waste water to be treated in a treatment plant. This means less cost for construction and operation of waste water treatment plants, as inherent limitations associated with such plants like lack of fund, limited area, and technological issues are inevitable. Implementation of clean production prior to waste water treatment reduces pollution figures down to certain levels that limitations in waste water treatment plants can be covered. Results show that biogas in 16 days HRT in an AnSBR reactor contains CH4(78.26 %) and CO2 (20.16 %). Meanwhile, treatments using a conventional bio-digester result in biogas with 72.16 % CH4 and 18.12 % CO2. Hence, biogas efficiency for the AnSBR system is 2.14 times greater than that of a conventional bio-digester.

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