scholarly journals Size dependence of silver nanoparticle removal in a wastewater treatment plant mesocosm measured by FAST single particle ICP-MS

2017 ◽  
Vol 4 (5) ◽  
pp. 1189-1197 ◽  
Author(s):  
Jani Tuoriniemi ◽  
Monika D. Jürgens ◽  
Martin Hassellöv ◽  
Geert Cornelis
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Silver Nanoparticle ◽  
Size Dependence ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Engineered Nanoparticles ◽  
Water Treatment Plants ◽  
Icp Ms

The quantities of engineered nanoparticles (NP) released to the environment are often influenced by their fate in waste water treatment plants (WWTP).

Water reuse for irrigation from waste water treatment plants with seasonal varied operation modes

2004 ◽  
Vol 50 (2) ◽  
pp. 47-53 ◽  
Author(s):  
P. Cornel ◽  
B. Weber
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Treated Wastewater ◽  
Nitrifying Bacteria ◽  
Water Treatment Plants ◽  
Operation Modes ◽  
Waste Water Treatment Plants

Irrigation periods are usually limited to vegetation periods. The quality requirements for treated wastewater for disposal and for reuse are different. The reuse of water for irrigation allows partly the reuse of the wastewater's nutrients (N and P). Outside the irrigation period the water must be treated for disposal, thus nutrient removal is often required in order to avoid detrimental effects on the receiving surface water body. Only wastewater treatment plants with different operation modes for different seasons can realise these requirements. The nitrification is the most sensitive biological process in the aerobic wastewater treatment process. At low water temperatures the nitrifying bacteria need several weeks to re-start full nitrification after periods without NH4-removal. Therefore it is necessary to develop options for waste water treatment plants which allow a fast re-start of the nitrification process. Based on theoretical considerations and computer simulations of the activated sludge treatment process, one possibility for implementing a wastewater treatment plant with different seasonal operation modes is evaluated.

scholarly journals APLIKASI MEMBRANE BIOREACTOR (MBR) UNTUK PROSES DAUR ULANG AIR LIMBAH

2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Taty Hernaningsih
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Membrane Bioreactor ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Quality Standards ◽  
Waste Water Treatment Plant ◽  
Recycled Waste

The population is growing rapidly result to increased demand for drinking water while the other side of this situation causes to the increasing amount of wastewater. Waste water treatment plant has been built in several major cities in Indonesia to overcome the problem of pollution.  Wastewater treatment plant only treats wastewater to tackle environmental pollution without being able to overcome the shortage of clean water community. Therefore, to solve the existing problems will be considered any further processing with recycled waste water treatment. One technology that may be developed for this purpose is the system of Membrane Bioreactor (MBR). This has been widely applied as an advanced unit of wastewater treatment and serves as a unit of processing recycled waste water. The MBR system has advantages such as: it only takes a little bit of land, can treat wastewater with discharge varying quality and process wastewater with high pollutant removal efficiency. MBR were investigated using a membrane filter submerged in the reactor. Membrane module is hollow fiber with a form of polymeric membrane materials. Research has been done on wastewater treatment with a combination of conventional WWTP as preliminary and advanced processing unit with MBR since March 4, 2014 until June 2014. The effluent quality  of result research proved that  the treated water quality meets  water quality standards are set with  Permenkes RI N0.416/Menkes/Per/IX/1990, dated 3 September 1990. The nitrification and denitrification also proceed well so that the concentration of nitrite and nitrate meet the quality standards. In addition, the percentage removal of heavy metals (arsenic, cadmium, chromium, selenium, lead) can reach 99%. Keywords: MBR, wastewater reuse, BOD5, COD, HRT dan SRT

A systematic approach to optimal upgrading of water and waste water treatment plants

1998 ◽  
Vol 37 (9) ◽  
pp. 9-16 ◽  
Author(s):  
Björn Rosén ◽  
Stig Morling
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Systematic Approach ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Cost Effective ◽  
Efficient Implementation ◽  
Local Conditions ◽  
Effective Implementation ◽  
Water Treatment Plants

Most of the future works in water and waste water treatment systems will involve the upgrading of existing facilities, for better performance and/or higher capacity. For the efficient implementation of any project, an upgrading strategy should be used, based on careful studies of the local conditions and the defined objectives to be reached. The paper presents a systematic approach to upgrading with emphasis on treatment plant extension, without investing in large volumes, by more efficient use of existing facilities, illustrated by some cases. The importance of real competition in obtaining a cost-effective implementation is stressed.

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.

scholarly journals Reabilitation of a wastewater treatment plant – possible environment impact

2017 ◽  
Vol 19 (1) ◽  
pp. 65-78
Author(s):  
Mădălina Stănescu ◽  
Constantin Buta ◽  
Geanina Mihai
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Wastewater Treatment Plant ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Environment Impact ◽  
Operational Phase

Abstract Romania, has declared, by the Governmental Decision nr.352/2005, all its territory as a sensitive area. This implies that, for all urban agglomerations larger than 10.000 population equivalent waste water treatment plants (WWTP) with nutrient removal must be built or upgraded. This paper presents the results regarding the possible environmental impacts expected from the project for construction of waste water treatment plant in the City of Vaslui, with main focus on surface water. This research study includes assessment methodology, project description regarding the rehabilitation and extension of the Vaslui waste water treatment plant, data related to water resources, impact assessment on water and appropriate mitigation measures. The assessment of the impacts has been performed for the construction and operational phase of the wastewater treatment plant. The construction phase was subdivided into several phases, while in the operational phase the impacts are analyzed following the line for treatment of the wastewater and effluent production, the line for sludge production and drying process, sludge disposal in safety conditions considering the provisions of 86/278/EEC Directive and the line for biogas utilization.

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

APPLIED OFF-LINE EXPERT SYSTEM FOR EFFLUENT, OPERATIONAL AND TECHNICAL PROBLEMS OF WASTE WATER TREATMENT PLANTS

1994 ◽  
Vol 30 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Gösta Ladiges ◽  
Rolf Kayser
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Knowledge Bases ◽  
Waste Water Treatment Plant ◽  
Technical Problems ◽  
Water Treatment Plants ◽  
Effluent Waste

An off-line expel1 system has been developed and implemented at a nutrient removing waste water treatment plant to provide the operators with knowledge required to run their plant. The system can be started at occurring problems, and for the choice of setpoints for the operation of the plant. It contains knowledge bases for various effluent waste water and technical problems, combining facts and relationships for different chemical, biological and technical processes with models and algorithms. This enables the system to assess situations and give proper advice as well based on facts, experience and calculations. The system is built on a personal computer, and works with a Windows user interface that has been developed in intense co-operation with the plant operators.

The Experience and the Results of Operating Small Wastewater Treatment Plants

1990 ◽  
Vol 22 (3-4) ◽  
pp. 267-273
Author(s):  
Mitja Rismal
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Energy Consumption ◽  
Water Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plants ◽  
Waste Water Treatment ◽  
Water Jet ◽  
Rotating Discs ◽  
Water Treatment Plants

About 15 years of experience gained from operating 7 small waste water treatment plants between 150-500 p.e. and 6 plants of 2000-3000 p.e. capacity are described. All of the plants involved are low-loaded activated sludge plants with water jet aeration generated by screw or propeller pumps which both proved to be efficient in aeration while secure and simple in operation. In comparison with other types of small treatment plants in our country (rotating discs and bubble aeration activated sludge plants), they proved to be reliable and simple in operation and produce an effluent of good quality. The energy consumption and the necessary flow velocites in aeration tanks are computed and measured.

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