ADVANCED TREATMENT OF BIOTREATED WATER OF SECONDARY SETTING TANKS FROM SUSPENDED SUBSTANCES BY VOLUME FILTER CARTRIDGES

2016 ◽  
Vol 6 (4) ◽  
pp. 49-53
Author(s):  
Arkady N. KIM ◽  
Alexandra Yu. ROMANOVA
Keyword(s):  
Wastewater Treatment ◽  
Polymeric Material ◽  
Suspended Solids ◽  
Settling Tank ◽  
Advanced Treatment ◽  
Suspended Substances ◽  
Secondary Settling ◽  
Filter Cartridge

The article considers the problem of removal of suspended substances from secondary setting tanks during wastewater treatment and suggests a technology of wastewater radvanced treatment from suspended solids with volume filter cartridge. The volume filter cartridge is placed inside a secondary settling tank - in front of the collection tray. Volume filter cartridge is a cylinder that is made of a porous polymeric material, the direction of filtration is determined as from outside to inside. The results of prototype installation use in secondary setting tank show that this technology allows to reduce the concentration of suspended solids by 75 %; BOD5 - up to 30 %; COD - up to 10 %.

scholarly journals Specific cost modelling for secondary treatment of wastewater

2021 ◽  
Vol 263 ◽  
pp. 04065
Author(s):  
Nikolay Makisha
Keyword(s):  
Wastewater Treatment ◽  
Settling Tank ◽  
Membrane Bioreactors ◽  
Conventional Activated Sludge ◽  
Cost Modelling ◽  
Cost Item ◽  
Treatment Facilities ◽  
Secondary Settling ◽  
Technological Treatment ◽  
Technological Modeling

The article is devoted to the study of model cost indicators of wastewater treatment facilities as one of the factors for ensuring sustainable development. It is noted that the greatest contribution in terms of cost formation is provided by the stage of biological wastewater treatment. As part of the study, a techno-economic simulation was conducted to compare two technological treatment schemes: conventional activated sludge scheme in aeration reactor and secondary settling tank, and treatment by means of membrane bioreactors. In the course of technological modeling, the concentrations of pollutants after treatment were obtained and compared for each of the schemes, as well as the values of possible harm to water bodies were calculated. Within the framework of cost modeling, capital and operating costs were obtained for the two variants, and key differences in their formation were analyzed. It is noted that the classical cleaning scheme requires the construction of a larger volume of structures, while for schemes with a membrane bioreactor, a significant cost item is the purchase of the actual membrane modules, but as the system performance increases, the share of these costs decreases.

Micro-straining as advanced treatment of wastewater applied to the main wastewater treatment plant in Wiesbaden

1994 ◽  
Vol 29 (12) ◽  
pp. 237-245
Author(s):  
Arno Grau ◽  
Michael Haeusler ◽  
Wälti Schmitt
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Suspended Solids ◽  
Treatment Plant ◽  
Advanced Treatment ◽  
Sand Filtration ◽  
Operational Costs ◽  
Solids Retention

Micro-straining as an advance treatment of wastewater has been evaluated in a half as well as full technical unit. Mesh dimensions of 10, 20 and 40 μ have been used, straining velocities between 10 to 35 m/h have been measured and suspended solids retention of 75 – 85 % could be achieved. The investment and operational costs are lower than those of other systems, e.g. sand filtration.

Influence of sludge properties and hydraulic loading on the performance of secondary settling tanks - full-scale operational results

2004 ◽  
Vol 50 (7) ◽  
pp. 179-186 ◽  
Author(s):  
R.J. Vestner ◽  
F. Wolfgang Günthert
Keyword(s):  
Suspended Solids ◽  
Loading Rate ◽  
Settling Tank ◽  
Full Scale ◽  
Volume Loading ◽  
Solids Concentration ◽  
Sludge Properties ◽  
And Performance ◽  
Secondary Settling ◽  
Flocculation Time

Full-scale investigations at a WWTP with a two-stage secondary settling tank process revealed relationships between significant operating parameters and performance in terms of effluent suspended solids concentration. Besides common parameters (e.g. surface overflow rate and sludge volume loading rate) feed SS concentration and flocculation time must be considered. Concentration of the return activated sludge may help to estimate the performance of existing secondary settling tanks.

Tracking influent inorganic suspended solids through wastewater treatment plants

2006 ◽  
Vol 54 (8) ◽  
pp. 101-109 ◽  
Author(s):  
G.A. Ekama ◽  
M.C. Wentzel ◽  
S.W. Sötemann
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Suspended Solids ◽  
Wastewater Treatment Plants ◽  
Settling Tank ◽  
Treatment Plant ◽  
Primary Sludge ◽  
Unit Operations ◽  
Sludge Digestion ◽  
N Removal

From an experimental and theoretical investigation of the continuity of influent inorganic suspended solids (ISS) along the links connecting the primary settling tank (PST), fully aerobic or N removal activated sludge (AS) and anaerobic and aerobic sludge digestion unit operations, it was found that the influent wastewater (fixed) ISS concentration is conserved through primary sludge anaerobic digestion, activated sludge and aerobic digestion unit operations. However, the measured ISS flux at different stages through a series of wastewater treatment plant (WWTP) unit operations is not equal to the influent ISS flux, because the ordinary heterotrophic organisms (OHO) biomass contributes to the ISS flux by differing amounts depending on the active fraction of the VSS solids at that stage.

scholarly journals Resource-building structures hydraulic account for treatment of vehicle washing stations wastewater

2021 ◽  
Vol 264 ◽  
pp. 03013
Author(s):  
Aybek Arifjanov ◽  
Uchqun Umarov ◽  
Akmal Abdullayev
Keyword(s):  
Wastewater Treatment ◽  
Suspended Solids ◽  
Wastewater Treatment Plants ◽  
Local Treatment ◽  
Settling Tank ◽  
Treatment Plant ◽  
Petroleum Products ◽  
Hydraulic Calculation ◽  
Design Parameters ◽  
Building Structures

The article presents a method for calculating the parameters of treatment facilities to bring the level of precipitation and wastewater from small enterprises, shops, and services of the Republic to the level of sewage and irrigation trays. The aim is to improve the design parameters of resource-efficient wastewater treatment plants and their widespread use, increase the production capacity of local wastewater treatment plants, improve the level of wastewater treatment and prevent environmental degradation. Hydraulic calculation of the design parameters of the settling tank was carried out at the local treatment plant. The precipitator works by precipitating suspended solids and separating petroleum products from the liquid surface. At the local treatment plant, the content of petroleum products in industrial and precipitation effluents was reduced to 3 mg/l, and the number of suspended solids to 1-1.5 mg/l.

Evaluation of a Small-Scale Biofilm Process for Wastewater Treatment

1991 ◽  
Vol 26 (1) ◽  
pp. 87-100
Author(s):  
Shankha K. Banerji ◽  
Kye-Min Cho
Keyword(s):  
Wastewater Treatment ◽  
Suspended Solids ◽  
Removal Rate ◽  
Synthetic Wastewater ◽  
Settling Chamber ◽  
Small Scale ◽  
Organic Removal ◽  
Biofilm Process ◽  
Secondary Settling ◽  
Bod Removal

Abstract An innovative aerated biofilm process (ABP) was evaluated under laboratory conditions to treat synthetic wastewater. The particular system performed well (>90% BOD removal) at fairly high BOD loading conditions (16.7 g BOD m−2d−1). The process did not require a separate secondary settling chamber to produce an effluent low in suspended solids (<10 mgL−1). The amount of sludge produced was lower than other comparable systems — 0.3g total solids were produced per g of BOD removed at an organic removal rate of 8 g BOD m−2d−1. This process could be adopted for treating wastewater in small systems.

scholarly journals Experience from the Implementation and Operation of the Biological Membrane Reactor (MBR) at the Modernized Wastewater Treatment Plant in Wydminy

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3410 ◽  
Author(s):  
Iwona Skoczko ◽  
Pawel Puzowski ◽  
Ewa Szatyłowicz
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Biological Membrane ◽  
Sewage Treatment ◽  
Settling Tank ◽  
Treatment Plant ◽  
Membrane Reactors ◽  
Northeastern Poland ◽  
Secondary Settling

Biological membrane reactors or membrane bioreactors (MBRs) based on pressure separation techniques are placed among the latest and most modern methods of wastewater treatment. Currently, this method is becoming more and more popular and is being implemented in smaller and larger wastewater treatment plants (WWTPs). However, technologists, operators, and managers of small WWTPs often do not understand the MBR technology installed in their sites and need extensive professional and technological information. The aim of this study was to analyze the modernized WWTP in a small town of Wydminy, located in northeastern Poland in the Great Masurian Lakes region, where the traditional secondary settling tank was replaced by an MBR. The effectiveness of wastewater treatment before modernization and after installation of the membrane module was compared. On the basis of the conducted research, it was noted that the operation of the plant after modernization is more cost-intensive. There were additional electricity costs due to ensuring adequate pressure on the membrane. Nevertheless, the obtained results of the removal of contaminants place the plant in Wydminy in the group of the most effective Polish sewage treatment plants, as compared to the results obtained in other facilities. The MBR operation also places high demands on the exploiters, prompting them to observe even the smallest changes. The conducted research is a type of a case study, which could give the readers an understanding of the necessity of traditional WWTP modernization with MBR.

Dimensioning of Final Settling Tanks of Large Activated Sludge Plants for High Quality Effluent

1992 ◽  
Vol 25 (4-5) ◽  
pp. 23-33 ◽  
Author(s):  
E. Billmeier
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Main Parameter ◽  
Organic Nitrogen ◽  
Suspended Solids ◽  
Settling Tank ◽  
Treatment Plant ◽  
High Quality ◽  
Effluent Quality ◽  
Operating Unit

The activated sludge tank and the final settling tank represent one operating unit in which the mixed liquor suspended solids indicate the main parameter. This parameter depends on the efficiency of the final settling tank so that this building determines the capacity of the whole wastewater treatment plant. The effluent quality improves with the separation capability of the clarifier because the suspended solids contain relatively large concentrations of BOD5 and COD and significant values of organic nitrogen and total phosphorus.

scholarly journals Determination on inhibition effects of coagulants used in wastewater treatment plants on anaerobic digester

2020 ◽  
Vol 82 (9) ◽  
pp. 1877-1884
Author(s):  
Güler Türkoğlu Demirkol ◽  
Gökhan Balcıoğlu ◽  
Nurtaç Öz ◽  
Moiz Elnekave ◽  
Bülent Armağan ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Suspended Solids ◽  
Wastewater Treatment Plants ◽  
Settling Tank ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
High Concentration ◽  
Biological Methods ◽  
Solids Removal

Abstract Domestic wastewaters causing pollution contain inorganic and/or organic materials. When the domestic wastewater outflows to the receiving waters, it causes physical, chemical, and biological pollution in them, and deteriorates the ecological balance of those waters. In the treatment of wastewater, various treatment methods are available depending on the pollution strength of the wastewater. Besides mechanical and biological methods, wastewater treatment with physicochemical methods is still one of the most effective and economical options. Particularly in wastewater with a high concentration of suspended solids, this method is very successful, and obtaining high suspended solids removal efficiencies is very possible. In this study, the effects of the use of coagulant and coagulant aid to be used in a treatment plant where domestic wastewater treatment is carried out are determined to increase the treatment efficiency of a biological treatment that comes later in the stages of the treatment. The effluent of the pre-settling tank may contain a lot of suspended solids. This presence of excess suspended solids decreases the efficiency at other levels of treatment and causes energy loss. In the experiments, the standard jar and inhibition tests are done as a method. As a result of the conducted studies, it is determined that the FeCl3, Synthetic coagulant LP 526, FeClSO4, and the combination of anionic polyelectrolyte yield the best results in the removal of the parameters of chemical oxygen demand (COD), total suspended solids (TSS), and volatile suspended solids (VSS). While FeCl3, APE 65, APE 85, Synthetic coagulant LP 526, and FeClSO4 did not show any inhibition effect in the sludge, APE 67, CPE 84, and (Al2(SO4)3 are found to cause inhibition in the sludge.

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