scholarly journals Reuse of effluent discharged from tannery wastewater treatment plants by powdered activated carbon and ultrafiltration combined reverse osmosis system

2016 ◽  
Vol 7 (1) ◽  
pp. 97-102 ◽  
Author(s):  
Am Jang ◽  
Jong-Tae Jung ◽  
Hayoung Kang ◽  
Hyung-Soo Kim ◽  
Jong-Oh Kim
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Reverse Osmosis ◽  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Powdered Activated Carbon ◽  
Tannery Wastewater ◽  
Combined System ◽  
Treatment Processes

We evaluate the applicability of a reverse osmosis (RO) system that combines powdered activated carbon (PAC) and ultrafiltration (UF) to treat the effluent discharged from tannery wastewater treatment plants. Conventional treatment processes such as neutralization, clariflocculation, and biological processes are used to clean the effluent before feeding to the PAC and UF combined RO system. The efficiency of the combined system was evaluated using the chemical oxygen demand Mn (CODMn), color, pH, turbidity, total nitrogen, total phosphate, and conductivity. The PAC was effective in greatly reducing the CODMn and color. The turbidity and silt density index of the UF permeate satisfied the water quality indices required for the RO feed. The RO system was constantly maintained at approximately 75% RO recovery, and the RO permeate satisfied the water quality requirements for reusing the processed water. Therefore, the PAC-UF combined RO system can be used to process effluent discharged from tannery wastewater treatment plants for reuse.

Assessment of membrane processes for taste and odour removal

2001 ◽  
Vol 1 (4) ◽  
pp. 19-24
Author(s):  
J.-M. Laîne ◽  
K. Glucina ◽  
L. Malleret ◽  
A. Bruchet ◽  
I. Baudin ◽  
...  
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Reverse Osmosis ◽  
Potable Water ◽  
Powdered Activated Carbon ◽  
Air Stripping ◽  
Membrane Processes ◽  
Treatment Processes ◽  
Water Companies ◽  
Odour Removal

The occurrence of tastes and odours (T&O) in potable water is considered one of the main problems by the drinking water companies. Thus, several treatment processes have been developed over the years to control T&O, including air stripping, activated carbon and oxidation using ozone. However, little information is available in the literature on the use of membranes for T&O removal. Therefore, the objective of this paper is to present potential of membrane processes for the removal of taste and odour-causing compounds. Several membranes were tested including ultrafiltration (UF), UF combined with powdered activated carbon (PAC), nanofiltration (NF) and low pressure reverse osmosis (LP RO) membranes. Combination of UF with PAC was found to be effective for T&O control. The use of NF or LP RO is still unclear in the objective of T&O control.

Recirculation of powdered activated carbon for the adsorption of dyes in municipal wastewater treatment plants

1999 ◽  
Vol 40 (1) ◽  
pp. 191-198 ◽  
Author(s):  
L. Nicolet ◽  
U. Rott
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Great Part ◽  
Treatment Plant ◽  
Powdered Activated Carbon ◽  
Municipal Wastewater Treatment ◽  
Positive Side ◽  
Municipal Wastewater Treatment Plants

The use and recirculation of powdered activated carbon (PAC) as an advanced treatment for colour removal in municipal wastewater treatment plants is presented. Studied wastewaters consist of domestic effluents with a high portion of dyehouse residual waters. The particularity of the treatment is that PAC is not disposed of before being recirculated several times. Therefore, it enables the use of a great part of the total adsorption capacity of the PAC. A positive side effect is that halogenated and refractory organic compounds, which are not degraded by micro-organisms in a conventional municipal wastewater treatment plant, are removed too. This paper describes results which were obtained in batch experiments and in a pilot plant during two years of observation, and concludes with advantages and drawbacks of this technology.

scholarly journals Sustainable Wastewater Treatment Using Electrocoagulation Process Coupled With Powdered Activated Carbon

2021 ◽  
Author(s):  
Farooq Sher ◽  
Sania Zafar Iqbal ◽  
Tahir Rasheed ◽  
Kashif Hanif ◽  
Jasmina Sulejmanović ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Pilot Plant ◽  
Wastewater Treatment Plants ◽  
Thermal Analyses ◽  
Powdered Activated Carbon ◽  
Volume Index ◽  
Electrochemical Technique ◽  
Operational Parameters ◽  
Sedimentation Tank

Abstract In this research an electrochemical technique in combination with powdered activated carbon (PAC) for the removal of micropollutants by adsorption as an advanced stage purification step from effluents of pilot plant wastewater treatment plants (WWTP). The effluents of sedimentation tank comprised of wastewater plus PAC (WWPAC). The pilot plant mainly consists of two parts; the first one consists of electrocoagulation (EC) reactor and the second consists of electrophoretic deposition (EPD) discs and electroflotation (EF) setup. The electrocoagulation (EC) reactor is a fiber box consisting of two chambers and thirty four plates of one material (either Fe or Al) on the whole in one EC reactor while one cell has seventeen plates. Both types of electrodes have been tested with the outflow of sedimentation tank. The outflow from the sedimentation tank has been entered into the EC reactor for the determination of EC reactor efficacy for the successful accomplishment of EC process at the designed pilot plant for WW treatment. The effect of different operational parameters; PAC dosage (20 mg), electrode nature (Fe and Al), current density (0.34–2.02 A/m2) has been studied to find out the optimum conditions. Sludge volume index (SVI) of the sludge, thermogravimetric (TG), differential thermal analyses (DTA) and particle size distribution (PSD) of the flocs generated after the EC process has also been studied. The turbidity, pH and conductivity of effluents before and after EC treatment has also been carried out. This pilot plant research gave promising results for future work in advance wastewater treatment direction.

Efficiency of membrane processes for taste and odor removal

2005 ◽  
Vol 51 (6-7) ◽  
pp. 257-265 ◽  
Author(s):  
A. Bruchet ◽  
J.M. Laîné
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Reverse Osmosis ◽  
Powdered Activated Carbon ◽  
Air Stripping ◽  
Membrane Processes ◽  
Treatment Processes ◽  
Taste And Odor ◽  
Odor Removal ◽  
Water Companies

The occurrence of tastes and odors (T&O) in drinking water is considered as one of the main problems by the drinking water companies. Thus, several treatment processes were developed over the years to control T&O including air stripping, activated carbon and oxidation using ozone. However, little information is available in the literature on the use of membranes for T&O removal. Therefore, the objectives of this paper are to present potential of membrane processes for removal of taste and odor causing compounds. Several membranes were tested including ultrafiltration (UF), UF combined with powdered activated carbon (PAC), nanofiltration (NF) and low pressure reverse osmosis (LP RO) membranes. The results of this study indicate that the combination of UF with PAC is effective for T&O control whereas the benefit of NF and LP RO remains unclear for T&O control.

scholarly journals Impact Assessment of the Wastewater Treatment Plants’ Discharges on Maritsa River

2021 ◽  
Vol 25 (2) ◽  
pp. 169-182
Author(s):  
Tony Venelinov ◽  
◽  
Galina Yotova ◽  
Veronika Mihaylova ◽  
Svetlana Lazarova ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Surface Water ◽  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Quality Parameters ◽  
Sampling Point ◽  
Before And After ◽  
Wastewater Samples ◽  
The Impact

Data analysis of wastewater samples at the outlets of wastewater treatment plants (WWTPs) of Pazardzhik, Plovdiv and Svilengrad, which discharge into the Maritsa River is presented. Total monthly loads for 2017 at the outlets are calculated using the monthly averages for the concentrations of chemical oxygen demand, biochemical oxygen demand, total phosphorus and total nitrogen (TN) and the monthly averages for the flow rates. The contributions of the WWTPs to the total river loads emphasize that the impact of WWTPs of Pazardzhik and Plovdiv is significantly greater than WWTP of Svilengrad. Additionally, river water samples were collected before and after the discharge points of the WWTPs in August 2018 and analyzed for water quality parameters listed in Directive 75/440/EEC. Comparison between the river concentrations before the outlet of WWPT - Pazardzhik and after the last sampling point (the outlet of WWTP - Svilengrad) indicates an increase for all the studied parameters, except for Al and Cu. Based on the results obtained for TN, the category of the surface water is significantly deteriorated after discharge of the WWTP - Plovdiv. Wastewater effect on the river surface water is also estimated by using a battery of ecotoxicological tests. The results are presented and compared by the classical approach using categorization based on water quality indicators.

scholarly journals Assessment of the Bulgarian Wastewater Treatment Plants’ Impact on the Receiving Water Bodies

Molecules ◽  
2019 ◽  
Vol 24 (12) ◽  
pp. 2274 ◽  
Author(s):  
Yotova ◽  
Lazarova ◽  
Kudłak ◽  
Zlateva ◽  
Mihaylova ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Surface Waters ◽  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Surface Water Quality ◽  
Classification Model ◽  
The European Union ◽  
Governmental Organizations ◽  
Non Governmental Organizations

Deterioration of water quality is a major problem world widely according to many international non-governmental organizations (NGO). As one of the European Union (EU) countries, Bulgaria is also obliged by EU legislation to maintain best practices in assessing surface water quality and the efficiency of wastewater treatment processes. For these reasons studies were undertaken to utilize ecotoxicological (Microtox®, Phytotoxkit FTM, Daphtoxkit FTM), instrumental (to determine pH, electrical conductivity (EC), chemical oxygen demand, total suspended solids (TSS), total nitrogen (N) and phosphorus (P), chlorides, sulphates, Cr, Co, Cu, Cd, Ba, V, Mn, Fe, Ni, Zn, Se, Pb), as well as advanced chemometric methods (partial least squares–discriminant analysis (PLS-DA)) in data evaluation to comprehensively assess wastewater treatment plants' (WWTPs) effluents and surface waters quality around 21 major Bulgarian cities. The PLS-DA classification model for the physicochemical parameters gave excellent discrimination between WWTP effluents and surface waters with 93.65% correct predictions (with significant contribution of EC, TSS, P, N, Cl, Fe, Zn, and Se). The classification model based on ecotoxicological data identifies the plant test endpoints as having a greater impact on the classification model efficiency than bacterial, or crustaceans’ endpoints studied.

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