Upgrading of 100 000 PE Goch Sewage Treatment Plant – Design of 2-Stage Sewage Treatment and Anaerobic Thermophilic/Mesophilic Sludge-Stabilisation

1992 ◽  
Vol 25 (4-5) ◽  
pp. 331-337 ◽  
Author(s):  
G. Kugel ◽  
E. Zingler ◽  
G. Hellfeier
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sewage Water ◽  
Activated Sludge Process ◽  
Plant Design ◽  
Potato Processing ◽  
Processing Wastes

The 100 000 PE Goch STP is to be upgraded by implementing a 2-stage activated sludge process with integrated nitrification and denitrification to treat strong sewage water dominated by potato processing wastes. Thermophilic (75 °C) acidification reactors will be added to mesophilic (38 °C) digesters (total hydraulic retention time about 13 days).

The effect of hydraulic retention time on the removal of pollutants from sewage treatment plant effluent in a surface-flow wetland system

Wetlands ◽  
10.1672/13 ◽  
2005 ◽  
Vol 25 (2) ◽  
pp. 375-391 ◽  
Author(s):  
Sylvia Toet ◽  
Richard S. P. Logtestijn ◽  
Ruud Kampf ◽  
Michiel Schreijer ◽  
Jos T. A. Verhoeven
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Surface Flow ◽  
Wetland System

The Infuence of the Depth of the Secondary Sedimentation Tanks on the Sedimentation Efficiency at Bromma Sewage Treatment Plant

1988 ◽  
Vol 20 (4-5) ◽  
pp. 143-152 ◽  
Author(s):  
M. Tendaj-Xavier ◽  
J. Hultgren
Keyword(s):  
Activated Sludge ◽  
Suspended Solids ◽  
Ferrous Sulphate ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Design Flow ◽  
Activated Sludge Process ◽  
Solids Concentration ◽  
Rapid Flow

Bromma sewage treatment plant is the second largest plant in Stockholm with a design flow of 160,000 m3/d. The wastewater is treated mechanically, chemically by pre-precipitation with ferrous sulphate, and biologically by the activated sludge process. The requirements for the plant are 8 mg BOD7/l, 0.4 mg P/l and 2 mg NH4+-N/l. The requirement for ammonia refers to the period July-October. In order to meet those rather stringent requirements, the biological step was expanded 3 years ago with 6 new sedimentation tanks. The 6 new tanks have the same area as the 6 old ones but they have only a depth of 3.7 m compared with the depth of the old tanks, 5.7 m. Experience from the first years of operation of the new tanks is that these tanks are more sensitive and less efficient than the older ones. It seems that the effluent suspended solids concentration from the old tanks is less influenced by rapid flow variations than the concentration in the effluent from the new secondary sedimentation tanks. During the nitrification period denitrification takes place to some degree in the secondary sedimentation tanks. This may cause loss of solids and it has been observed that the deeper old tanks usually produce an effluent of better quality and seem to be less influenced by denitrification than the new ones.

The Project Design of Seasonal Reclaimed Water Utilization System for Liaobin Water Town

2011 ◽  
Vol 243-249 ◽  
pp. 4766-4770
Author(s):  
Ji Ku Zhang ◽  
Yang Jiang ◽  
Lin Zou
Keyword(s):  
Sewage Treatment ◽  
Reclaimed Water ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sewage Water ◽  
Project Design ◽  
Water Utilization ◽  
Reuse System ◽  
Sewage Reuse ◽  
Research Analysis

Conbined with the Eco-residential Island, the project of reclaimed water utilization for Liaobin water town in Panjin is mainly introduced. The reclaimed water resource contains rainwater and domestic sewage water, which is collected mainly in the range of urban (regional).After the second-level processing by sewage treatment plant, it is mainly served as flushing water ,which is called “full-sewage” reuse system; in dry season, it is reused directly after corresponding treatment; and in rainy season, the excessive water is pumpinged into the surrounding waterbodies. The research analysis indicates that the plan of “full-sewage” reuse system and the seasonal reclaimed water utilization system used in this area are reasonable and feasible, which can make full use of the reclaimed water and save the water resources effectively, meeting the demand of sustainable development .

scholarly journals Study of the performance of disinfection with sodium hypochlorite on a full-scale sewage treatment plant

2020 ◽  
Vol 15 (6) ◽  
pp. 1
Author(s):  
Maria Rosaria Boni ◽  
Sabrina Copelli ◽  
Massimo Raboni
Keyword(s):  
Sodium Hypochlorite ◽  
Retention Time ◽  
Contact Time ◽  
Regression Line ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Full Scale ◽  
Process Efficiency ◽  
Residual Chlorine

A full-scale sewage treatment plant was investigated to assess the performance of the disinfection stage. Sodium hypochlorite was used as a disinfectant agent and the process efficiency was evaluated by E.coli removal. The research took place over a period of two years in order to evaluate the effect of retention time (t) and residual chlorine (Cr) under different seasonal conditions. The effectiveness of E.coli removal with sodium hypochlorite proved to be strictly dependent on the factor CR  t (product of residual chlorine with the contact time). The regression line of the experimental points was, on the whole, well comparable with the model proposed by Collins, especially in the field of CRt lower than 30 mg L-1 min.

scholarly journals Tolerable Risk for Hydrogen Sulfide in Sewage Treatment Plant- STP

2022 ◽  
Vol 16 (4) ◽  
pp. 74
Author(s):  
Mohieldeen M. A. Ahmed ◽  
Mohammed H. M. Gaily ◽  
Khalid M.O. Ortashi ◽  
Omer M.A. Al Ghabshawi ◽  
Nagwa F. Bashir ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Activated Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Radiation Hazard ◽  
Activated Sludge Process ◽  
Outlet Channel ◽  
Toxic Gas ◽  
Inlet Chamber

Hydrogen sulphide is a toxic gas, it can cause a range of physiological responses from simple annoyance to permanent injury and death. There are a number of approaches to deal with the impacts of toxic gases. This study focused on minimizing the hazard exposure for hydrogen sulfide in the different operational zones for activated sludge process in sewage waterplant. Research tools/ approaches conducted were interviews, toxic gas testers, analysis report interpretation &amp; quantitative risk assessment method. The study was conducted on Arabian Peninsula during the period (September 2019- September 2021). The (13) operational locations tested for toxic gas concentrations were inlet chamber, outlet channel, coarse /fine screens, primary sedimentation tank, activated sludge tanks, secondary sedimentation tanks, gas desulfurization unit, disc filters, chlorine dosing unit, sludge dewatering, sludge silos and digester tanks. The study found that the highest concentration for H<sub>2</sub>S in the inlet chamber/ outlet channel. The severity hazards in the sewage treatment plant using activated sludge process are the asphyxiation by H<sub>2</sub>S was extremely high can cause harm to public health, followed by the radiation hazard followed by electrical hazard, then (working at height, mechanical, traffic, health, chemical, physical, ergonomic, environmental, microbial and natural). The frequency of hazards occurrence is asphyxiation by H<sub>2</sub>S was extremely high followed by the radiation hazard and health hazard including the infection with Covid 19 virus followed by mechanical hazard then (electrical, traffic, ergonomic, natural, chemical, physical and natural). Control measures were recommended to minimize the risk of asphyxiation by H<sub>2</sub>S in the working environment at the STP.

Changes in Microfauna at the Time of Occurrence and Disappearance of Filamentous Bulking

1991 ◽  
Vol 23 (4-6) ◽  
pp. 907-916 ◽  
Author(s):  
M. Terashi ◽  
S. Hamada
Keyword(s):  
Hydrogen Sulfide ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Aeration Tank ◽  
Activated Sludge Process ◽  
Filamentous Bacteria ◽  
Filamentous Bulking ◽  
Final Effluent ◽  
Low Do

In the activated sludge process, the cause of filamentous bulking is often the filamentous bacteria Type 021N. At the Kitaminato sewage treatment plant, it was found that when the DO in the aeration tank decreased, filamentous bulking occurred. If the low DO condition is allowed to continue, anaerobic degraded organic matter is produced which creates a favorable condition for the multiplication of Type 021N. Entosiphon sp. is reported to show resistance to low DO; however, sometimes before filamentous bulking occurs, Entosiphon sp. itself multiples. Also if Entosiphon sp. increases and Cinetochilummargaritaceum, of the Ciliophora, multiples, then bulking by Type 021N has been seen not to occur. Cinetochilummargaritaceum has low resistance to hydrogen sulfide; therefore, hydrogen sulfide must not be present in the aeration tank and this means that bulking by Type 021N can not become serious. However, if filamentous bulking becomes serious, only increasing the DO level in the aeration tank will not cause the disappearance of the filamentous bulking. At this stage, if we allow 30% of the final effluent to flow back into the grit chamber, then Type 021N decreases. This is because Trithigmostomacucullulus, of the Ciliophora, increases to 3,000 number/ml, and it ingests Type 021N.

scholarly journals Sewage Water Treatment Plant for Hingna

2021 ◽  
Vol 9 (VI) ◽  
pp. 796-798
Author(s):  
Vinay Khewale
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Water Treatment Plant ◽  
Sewage Water ◽  
Treated Effluent ◽  
Sewage Water Treatment

A sewage water treatment plant is necessary to receive and treat waste water (Domestic, Commercial, and Industrial). Its objective is to be convert harmful waste water to safe water environmentally and treated effluent and treated sludge suitable for reuse and disposal such as farm fertilizer. The characteristics of waste water have been performed followed by design of sewage treatment plant. The present study includes design of sewage treatment plant and analysis of waste water – PH value, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Solids (TS), Hardness, Chloride, Acidity, Oil, Fats and grease etc. The sample collection of waste water has been done in many times in a day to obtain an average value of major parameter. Followed by values of this parameter, calculations are done for designing the units of sewage treatment plant and layout is prepared for the same

Analysis and Design of Sewage Treatment Plant: A Case Study Atnagore

2019 ◽  
Vol 1 (6) ◽  
pp. 543-552
Author(s):  
Elangovan G ◽  
Rajanandhini V.M
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sewage Water ◽  
Municipal Sewage ◽  
Steady Increase ◽  
Analysis And Design ◽  
Treated Sewage ◽  
Secondary Clarifier

The main objective of this study is to carry out to design of a sewage treatment plant for a Nagore and Nagore district, because it has been one of the developing pilgrimage places. Due to steady increase of increasing population, there will be more generation of domestic and municipal sewage. Sewage produces obnoxious smell which causes disease to all creatures. To avoid this problem, proper treatments is necessary before disposal to land by not throwing sewage directly to natural resources and reuse the treated water that ultimately reduces the overall demand of fresh water. Its objective is to produce an environmental safe fluid waste and solid waste suitable for disposal or reuse. In one day the total sewage generated was estimated 5 MLD considering the projected population of Nagore town for the next 30 years? Consequently this paper focuses on the sewage generation in the Nagore area based on the population and sewage treatment plant is designed accordingly. It is proposed to design the various components of sewage treatment plant considering the various standards and permissible limits of treated sewage water. The various components of sewage treatment plant are screening, grit chamber, primary sedimentation tank, biological reactor, secondary clarifier, activated sludge tank and drying beds.

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