Naser Mehrdadi; Ali Torabian; Amir Khakpour; Mojdeh Soroush
Volume 14, Issue 2 , July 2016, , Pages 61-68
Abstract
Today, reducing waste water as one of the greatest challenges we face in the industrial process and, since the wastewater is one of the major pollutants produced in that process, the ability to restore and reuse water and to reduce water consumption represents an important step towards overall waste ...
Read More
Today, reducing waste water as one of the greatest challenges we face in the industrial process and, since the wastewater is one of the major pollutants produced in that process, the ability to restore and reuse water and to reduce water consumption represents an important step towards overall waste water reduction. This article investigates the minimization of water consumption and wastewater in the copper industry and, specifically, in Unit Three of the Khatoon Abad copper complex. One conventional method and one new method named Water Pinch are described for this purpose. In the first, second and third modes, respectively, the TSS-TDS, Turbidity-TDS and TSS-Turbidity parameters were considered as the indicators. The results showed a saving in raw water consumption of 379, 22 and 401 m3/day (equal to 25, 1.46 and 26 %), respectively, which is a significant amount.
Azadeh kazemi; Hamid Reza Jafari; Ali Torabian; Ali Akbar Matkan
Volume 12, Issue 2 , July 2014
Abstract
Remote sensing system, especially hyperspectral remote sensing require fundamental knowledge of spectral reflectance of chlorophyll a (chl a) for recognizing eutrophication of inland waters. The first objective of this study was to prepare and investigate the significant differences between the spectral ...
Read More
Remote sensing system, especially hyperspectral remote sensing require fundamental knowledge of spectral reflectance of chlorophyll a (chl a) for recognizing eutrophication of inland waters. The first objective of this study was to prepare and investigate the significant differences between the spectral signature of water samples with different amount of chlorophyll a (chl a) of Anzali wetland in 15 cm depth. This was carried out using a full range spectrometer during the spring 2013. The second objective of this study was to discriminate the spectral signature of water samples with different amount of chlorophyll a (chl a) of Anzali wetland in 30 cm depth. A total of 500 water sample spectral curves of illuminated and shaded samples were acquired of 80 water samples with different amount of chlorophyll between 2.07 and 23.9 mg/l. Following the measurements, chlorophyll and total phosphorus of the samples were extracted in laboratory. One important index related to chlorophyll a of water was calculated and statistically analyzed. We conclude that band ratio model in 15 cm depth of water samples has the most relation with chlorophyll a content in comparison with the other indices. This result has been proved by statistical results obtained by chlorophyll and total phosphorus data in lab.
Seyyed Mehran Abtahi; Ali Torabian; Ali Vosoogh; Babak Jafari; Mehdi Gholizadeh
Volume 8, Issue 2 , January 2011
Abstract
Abstract A pilot scale anaerobic baffled reactor (ABR), for treating low-strength industrial wastewater (671.5±49.9 mg COD/L, 350.1±36.8 mg BOD5/L) was studied. The reactor was started with a hydraulic retention time (HRT) of 25 h and this was gradually reduced to 3.33 h. The best reactor ...
Read More
Abstract A pilot scale anaerobic baffled reactor (ABR), for treating low-strength industrial wastewater (671.5±49.9 mg COD/L, 350.1±36.8 mg BOD5/L) was studied. The reactor was started with a hydraulic retention time (HRT) of 25 h and this was gradually reduced to 3.33 h. The best reactor performance was observed with an organic loading rate (OLR) of 4.45 g COD/L.d which was at HRT of 4 h and the COD removal efficiency was obtained up to 78.27% and majority of COD removal was occurred in the first compartment. Under these conditions, for prediction of the effluent substrate concentration (Se) and optimum volume of the ABR (V), the Monod and Kincannon-Stover models were investigated. With using the Kincannon-Stover model, parameters of Umax and KB were obtained 2 and 2.14 g COD/L.d, respectively since, for the Monod model, the parameters of K and KS resulted as 1.54 g COD/g VSS.d and 0.21g COD/L, respectively. The regression line for the plotted linear equation of the Kincannon-Stover model had a R2 of 0.84 which was lower than that found for the Monod model with R2 of 0.985. Meanwhile, in the Monod model, the parameters of Y and Kd were obtained 0.073 g VSS/g COD and -0.008 d-1, respectively. The present study demonstrated that the Monod model is more suitable and applicable for formulating a kinetic model for prediction of the effluent substrate concentration and optimum volume of the ABR at the similar operation conditions.
