Aquatic toxicity emission from Tokyo: wastewater measured using marine luminescent bacterium, photobacterium phosphoreum

1996 ◽  
Vol 33 (6) ◽  
pp. 121-128 ◽  
Author(s):  
Mari Asami ◽  
Noriyuki Suzuki ◽  
Junko Nakanishi
Keyword(s):  
Point Source ◽  
Aquatic Toxicity ◽  
Sewage Treatment ◽  
Photobacterium Phosphoreum ◽  
Treated Wastewater ◽  
Municipal Sewage ◽  
Tokyo Bay ◽  
Sewage Treatment Plants ◽  
Luminescent Bacteria ◽  
Point Source Discharges

Aquatic toxicity of point-source discharges are examined with the MICROTOX system using luminescent bacteria, Photobacterium phosphoreum. Samples include treated wastewaters from industrial dischargers, municipal sewage treatment plants and community sewage treatment plants, all of which eventually flow into Tokyo Bay. Among 34 samples from industry, 11.7% exhibit high toxicity (EC50 =< 0.2), 17.6% exhibit low toxicity (0.2 < EC50 =< 1), and 70.7% were non- or only slightly toxic (1 < EC50). Aquatic toxicity of treated wastewater is mostly due to the chlorination process. Results suggest that 96% of the total toxicity load of all point-source discharges is caused by chlorination. The toxicity assessment with luminescent bacteria is shown to be effective and of practical use, since it facilitates the evaluation of the total toxicity which cannot be well embodied in the current regulation systems by specific indices.

scholarly journals Risk Assessment Analysis in a Municipal Wastewater Treatment Plant

Proceedings ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 18
Author(s):  
Magdalena Łój-Pilch ◽  
Anita Zakrzewska ◽  
Ewa Zielewicz
Keyword(s):  
Risk Assessment ◽  
Municipal Wastewater ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Municipal Sewage ◽  
Proper Function ◽  
Municipal Wastewater Treatment ◽  
Sewage Treatment Plants

Risk management, an aspect of which is risk assessment, is a process supporting the proper function of municipal sewage treatment plants. Many factors affect the quality of treated wastewater. Risk assessment, its analysis, and hierarchization permit the elimination of events with the most destructive impacts on the purification process.

Presence of Phenolic Compounds in Sewage, Effluent and Sludge from Municipal Sewage Treatment Plants

1982 ◽  
Vol 14 (4-5) ◽  
pp. 143-150 ◽  
Author(s):  
F B DeWalle ◽  
D A Kalman ◽  
R Dills ◽  
D Norman ◽  
E S K Chian ◽  
...  
Keyword(s):  
Sewage Treatment ◽  
Municipal Sewage ◽  
Sewage Effluent ◽  
Capillary Gc ◽  
Digested Sludge ◽  
Calculated Concentration ◽  
Sewage Treatment Plants ◽  
Anaerobically Digested Sludge ◽  
Final Effluent ◽  
Dimethyl Phenol

A total of 25 municipal sewage treatment plants were sampled, 10 of which were resampled, to determine the quantity of phenolics in the sewage, final effluent and the anaerobically digested sludge using capillary GC/MS/DS/techniques. The study noted in decreasing order of frequency in raw sewage: phenol, pentachloro-phenol, dimethyl phenol, 3-methyl, 4-chlorophenol, 2,4,6-trichloro-phenol, 2,4-dichlorophenol, 2-nitrophenol, 2-chlorophenol, 2,4-dinitro-6-methylphenol and 2,4-dinitrophenol. The maximum concentration of phenol in sewage and sludge was 2800 ppb and 4460 respectively, while similar values for pentachlorophenol were 58 and 1200 ppb. Statistically calculated concentration reductions for phenol and dimethyl phenol were generally greater than noted for tri- and pentachlorophenol. Low decreases or increases were noted for monochlorophenol and especially for dichlorophenol as a result of the chloronation of the final effluent.

Removal of estrogenicity in Swedish municipal sewage treatment plants

2003 ◽  
Vol 37 (18) ◽  
pp. 4433-4443 ◽  
Author(s):  
Anders Svenson ◽  
Ann-Sofie Allard ◽  
Mats Ek
Keyword(s):  
Sewage Treatment ◽  
Municipal Sewage ◽  
Sewage Treatment Plants

scholarly journals Antibiotics in two municipal sewage treatment plants in Sri Lanka: Occurrence, consumption and removal efficiency

2019 ◽  
Vol 5 ◽  
pp. 272-278 ◽  
Author(s):  
Dilanka N.D. Samaraweera ◽  
Xin Liu ◽  
Guangcai Zhong ◽  
Tilak Priyadarshana ◽  
Riffat Naseem Malik ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Removal Efficiency ◽  
Sewage Treatment ◽  
Municipal Sewage ◽  
Sewage Treatment Plants

scholarly journals Differences in the ASM model caused by data structure

2018 ◽  
Vol 45 ◽  
pp. 00036
Author(s):  
Zbigniew Kowalewski
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Municipal Sewage ◽  
Insufficient Amount ◽  
The Usa ◽  
Plant Monitoring ◽  
Model Family

The process of designing and exploiting municipal sewage treatment plants has become much simpler and more efficient thanks to mathematical modeling. The ASM model family is able to simulate the operation of existing or designed objects in a satisfactory manner. The basic problem in Poland is the insufficient amount of data for simulations coming from plant monitoring. It is provided to create unstable model results with difficulties in calibration and validation. The aim of this article is to confirm how the amount of data and its completeness will affect the quality of the simulation performed in the ASM model. The study object is a sewage treatment plant located in Chicago in the USA. It is a sewage treatment plant operating with activated sludge technology, with regular monitoring of the quality of raw and treated wastewater. For modeling, a variant of the ASM model built into the BioWin 5.2 software was used.

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