scholarly journals Special issue : Technology for new regulation on water quality and water drainage.Effects of organochlorine compounds on activated sludge process.

1994 ◽  
Vol 23 (4) ◽  
pp. 200-205
Author(s):  
Hiroaki TANAKA ◽  
Eiichi NAKAMURA ◽  
Koya KOMORI
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Organochlorine Compounds ◽  
Activated Sludge Process ◽  
Special Issue

Activated sludge process coupled with intermittent ozonation for sludge yield reduction and effluent water quality control

2011 ◽  
Vol 86 (7) ◽  
pp. 978-984 ◽  
Author(s):  
Oliver Järvik ◽  
Andres Viiroja ◽  
Sven Kamenev ◽  
Inna Kamenev
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Activated Sludge ◽  
Yield Reduction ◽  
Activated Sludge Process ◽  
Effluent Water ◽  
Water Quality Control

Application of Inertial Effect in Activated Sludge Process

2014 ◽  
Vol 955-959 ◽  
pp. 2080-2082
Author(s):  
Hong Mei Liu ◽  
Gang Zhu ◽  
Ke Zhao ◽  
Zhuang Liu
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Hydraulic Retention Time ◽  
Treatment Plant ◽  
First Grade ◽  
Inertial Effect ◽  
Activated Sludge Process ◽  
Municipal Wastewater Treatment ◽  
Cold Winter

The inertial effect applied to activated sludge process, the practice shows that in energy efficiency and reduce the hydraulic retention time it is obvious than not using the inertial effect. In cold winter areas to ensure water quality can meet the first grade A standard of "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant" (GB18918-2002)

scholarly journals TREATING PALM OIL MILL EFFLUENT BY ACTIVATED SLUDGE PROCESS USING SUBMERGED MECHANICAL AERATOR/AGITATOR REPLACING SURFACE AERATOR

2019 ◽  
Vol 81 (3) ◽  
Author(s):  
Yahaya Hawari ◽  
Wira Jazair Yahya ◽  
Ikuma Sonda ◽  
Hirotaka Kawashima ◽  
Zahari Mohamad ◽  
...  
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Palm Oil ◽  
Removal Rate ◽  
Palm Oil Mill Effluent ◽  
Aeration Tank ◽  
Water Quality Criteria ◽  
Activated Sludge Process ◽  
Activated State ◽  
Palm Oil Mill

Activated sludge process (ASP) is gaining recognition as a process technique for the control of biological oxygen demand (BOD) in palm oil mill effluent (POME). Surface aerators or diffusing plates are often used in aeration tanks serving as core of the ASP. For consistent improvement in water quality within the aeration tank utilising the ASP and in particular, mitigating its BOD effluent stream, this study replaced the surface aerator with submerged mechanical aerator/agitator incorporating separate “agitation function” and “agitation diffusing function” intended for use in aeration tank of polishing plant that contains surface aerators. In order to confirm the activated state of the sludge in the aeration tanks, sludge was observed by microscopy (magnification 600 ´ or lower). The water analysis, POME, BOD, ammonium, and total nitrogen were analsyed. As a result of the study, improvement in water quality criteria including the agitation state in the aeration tank, mixed liquid dissolved oxygen, and BOD were observed. The BOD has improved from 34.7% to 93.1% at a maximum removal rate.

Steps in Planning the Expansion of the Large Sewage Treatment Plant at Buchenhofen, Operated by the Wupper Watershed Management Association

1990 ◽  
Vol 22 (7-8) ◽  
pp. 123-129 ◽  
Author(s):  
Jörg Londong ◽  
Stefan Zander
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Activated Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Surface Water Quality ◽  
Class Ii ◽  
Activated Sludge Process ◽  
Quality Class

Sewage from 700,000 PE, roughly half of which is discharged by industry, is treated at the Buchenhofen plant operated by the WWMA, using a conventional, activated-sludge process without specific nutrient elimination. A draft management plan has been prepared for the receiving stream of the treatment plant, the Lower Wupper. The chief forms of use for the waters are fixed in binding agreements. The use entailing the strictest limiting values is recreational fishing, which demands surface water quality class II. Very substantial demands, which must be regarded as at least equivalent to state-of-the-art technology, are imposed on the Buchenhofen facility. The Institut für Siedlungswasserbau, Wassergütewirtschaft und Abfalltechnik at the University of Stuttgart was commissioned to formulate realistic purification objectives for the treatment plant and to prepare expansion concepts. At Buchenhofen, the single-stage activated sludge process with nitrification and preliminary de-nitrification has proved to be the most effective method for eliminating nitrogen while simultaneous precipitation followed by flocculation-filtration is the best process for eliminating phosphorus. For purely scientific reasons, however, the extreme demands in terms of ammonium and nitrite rule out expansion of a treatment plant of this size. The proposed designs therefore require validation through commercial-scale testing. Only after a 6- to 12-month test series has been evaluated will a draft design be prepared for approval, ultimately enabling the plant to be expanded and to fulfil the management planning objective of achieving surface water quality class II in the Wupper.

scholarly journals Effects of Power Saving on Treatment Water Quality and Biota Characteristics in an Activated Sludge Process of SewageTreatment

2011 ◽  
Vol 47 (4) ◽  
pp. 157-168 ◽  
Author(s):  
KOJI JONO ◽  
HIROSHI YAMAZAKI ◽  
AKIRA SANO ◽  
KAI-QIN XU ◽  
RYUHEI INAMORI ◽  
...  
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Power Saving ◽  
Activated Sludge Process ◽  
Treatment Water

Treatment System of Wastewater from Rural Settlements with Batch-Activated Sludge Process

1993 ◽  
Vol 28 (10) ◽  
pp. 223-232 ◽  
Author(s):  
Y. Yuyama ◽  
K. Fujino ◽  
Y. Miyamoto ◽  
R. Oonishi
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Removal Rate ◽  
Treatment System ◽  
Aeration Tank ◽  
Activated Sludge Process ◽  
Rural Settlements ◽  
Time Data ◽  
Treated Water ◽  
Remote Monitoring System

The treatment system for rural communities with Batch-Activated Sludge Process was improved. The focus was on removal of nitrogen by intermittent aeratyion. Following the experimental results, treated water quality lower than 10 mg/l of BOD and T-N was ensured throughout the year, under the operational conditions of hydraulic retention time in aeration tank longer than 24 h and MLSS higher than 2,500 mg/l. Treated water quality of T-N was less than 5 mg/l within cumulative frequency of 66%. Removal capacity of T-N did not reach its limit under condition less than 0.05 kgN/m3d−1 of influent load. Estimating from the nitrogen removal rate, consumption of alkalinity, characteristics of biomass growth and the amount of nitrogen content in MLSS, 77% of influent nitrogen was denitrified, 18% of that was discharged as treated water and 5% of that was extracted as excess sludge or SS in treated water. Fluctuation patterns of DO and ORP in a cycle by seasonally changed water temperature were effective indices for regulation of operation. A remote monitoring system was helpful to support the management, because it enabled maintenance staff to judge urgency of management from the latest real time data.

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