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The estimation of per capita loadings of domestic wastewater in Tehran.

Mesdaghinia A, Nasseri S, Mahvi AH, Tashauoei HR, Hadi M - J Environ Health Sci Eng (2015)

Bottom Line: The results indicated the values of 32.96 ± 1.91, 49.25 ± 2.49, 37.31 ± 2.44, 6.77 ± 0.53, 1.96 ± 0.11, 92.23 ± 5.68, 2.07 ± 0.39 and 128.96 ± 6.69 g/d.cap of GPCD for BOD5, COD, TSS, TKN, P, TDS, ON and TS, respectively, for Tehran's wastewater.It was revealed that the Tehran's wastewater may be classified as highly degradable, but during recent decades its Biodegradability Index (BI) has been reduced up to 15%.These values could help in designing more accurate treatment systems and may lower the required capacity for the treatment of wastewater up to 40% in Tehran.

View Article: PubMed Central - PubMed

Affiliation: Center for Water Quality Research (CWQR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran.

ABSTRACT
The amount of wastewater characteristics loading is one of the main parameters in the design of wastewater collection and treatment systems. The generation per capita per day (GPCD) of wastewater characteristics was estimated by analyzing the monthly data of nine wastewater treatment plants in Tehran, capital city of Iran. GPCD values were calculated from measured collected wastewater flow, the population and concentration data. The results indicated the values of 32.96 ± 1.91, 49.25 ± 2.49, 37.31 ± 2.44, 6.77 ± 0.53, 1.96 ± 0.11, 92.23 ± 5.68, 2.07 ± 0.39 and 128.96 ± 6.69 g/d.cap of GPCD for BOD5, COD, TSS, TKN, P, TDS, ON and TS, respectively, for Tehran's wastewater. The per capita estimated for the wastewater production and treatment were determined to be 186.06 ± 7.85 and 136.72 ± 5.43 L/d.cap, respectively. It is estimated that about 504 m(3)/d and 346 m(3)/d of sludge, will be produced and waste as excrement raw sludge, respectively, in Tehran. Simple regression models were presented the relationships such as the change of collected and treated wastewater with population and changes of GPCD parameters with each other. It was revealed that the Tehran's wastewater may be classified as highly degradable, but during recent decades its Biodegradability Index (BI) has been reduced up to 15%. The new suggested revised per capita parameters can be used for design purposes in Tehran, and possibly, in areas with similar characteristics, substituting the classical values obtained from foreign textbooks. These values could help in designing more accurate treatment systems and may lower the required capacity for the treatment of wastewater up to 40% in Tehran.

No MeSH data available.


Related in: MedlinePlus

The flow of treated (a) and collected (b) wastewater versus population.
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Fig1: The flow of treated (a) and collected (b) wastewater versus population.

Mentions: The total yearly averaged population covered by Tehran’s nine municipal wastewater treatment plants from 2007 to 2013 was determined to be 4,502,065 persons per year. In average, out of 22,778,632 m3/year estimated collected wastewater from 2007 to 2013, only 19,749,770 m3/year of it were treated. In other words, about three MCM per year (13% of estimated collected wastewater from 2007 to 2013) were discharged into the environment without adequate treatment. The mathematical relationships between wastewater flows and population in Tehran were shown in Figure 1.Figure 1


The estimation of per capita loadings of domestic wastewater in Tehran.

Mesdaghinia A, Nasseri S, Mahvi AH, Tashauoei HR, Hadi M - J Environ Health Sci Eng (2015)

The flow of treated (a) and collected (b) wastewater versus population.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4374509&req=5

Fig1: The flow of treated (a) and collected (b) wastewater versus population.
Mentions: The total yearly averaged population covered by Tehran’s nine municipal wastewater treatment plants from 2007 to 2013 was determined to be 4,502,065 persons per year. In average, out of 22,778,632 m3/year estimated collected wastewater from 2007 to 2013, only 19,749,770 m3/year of it were treated. In other words, about three MCM per year (13% of estimated collected wastewater from 2007 to 2013) were discharged into the environment without adequate treatment. The mathematical relationships between wastewater flows and population in Tehran were shown in Figure 1.Figure 1

Bottom Line: The results indicated the values of 32.96 ± 1.91, 49.25 ± 2.49, 37.31 ± 2.44, 6.77 ± 0.53, 1.96 ± 0.11, 92.23 ± 5.68, 2.07 ± 0.39 and 128.96 ± 6.69 g/d.cap of GPCD for BOD5, COD, TSS, TKN, P, TDS, ON and TS, respectively, for Tehran's wastewater.It was revealed that the Tehran's wastewater may be classified as highly degradable, but during recent decades its Biodegradability Index (BI) has been reduced up to 15%.These values could help in designing more accurate treatment systems and may lower the required capacity for the treatment of wastewater up to 40% in Tehran.

View Article: PubMed Central - PubMed

Affiliation: Center for Water Quality Research (CWQR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran.

ABSTRACT
The amount of wastewater characteristics loading is one of the main parameters in the design of wastewater collection and treatment systems. The generation per capita per day (GPCD) of wastewater characteristics was estimated by analyzing the monthly data of nine wastewater treatment plants in Tehran, capital city of Iran. GPCD values were calculated from measured collected wastewater flow, the population and concentration data. The results indicated the values of 32.96 ± 1.91, 49.25 ± 2.49, 37.31 ± 2.44, 6.77 ± 0.53, 1.96 ± 0.11, 92.23 ± 5.68, 2.07 ± 0.39 and 128.96 ± 6.69 g/d.cap of GPCD for BOD5, COD, TSS, TKN, P, TDS, ON and TS, respectively, for Tehran's wastewater. The per capita estimated for the wastewater production and treatment were determined to be 186.06 ± 7.85 and 136.72 ± 5.43 L/d.cap, respectively. It is estimated that about 504 m(3)/d and 346 m(3)/d of sludge, will be produced and waste as excrement raw sludge, respectively, in Tehran. Simple regression models were presented the relationships such as the change of collected and treated wastewater with population and changes of GPCD parameters with each other. It was revealed that the Tehran's wastewater may be classified as highly degradable, but during recent decades its Biodegradability Index (BI) has been reduced up to 15%. The new suggested revised per capita parameters can be used for design purposes in Tehran, and possibly, in areas with similar characteristics, substituting the classical values obtained from foreign textbooks. These values could help in designing more accurate treatment systems and may lower the required capacity for the treatment of wastewater up to 40% in Tehran.

No MeSH data available.


Related in: MedlinePlus