Application of low-cost sorbents to remove chromium from industrial wastewater discharges

2010 ◽  
pp. 249-264
Keyword(s):  
Industrial Wastewater ◽  
Low Cost

scholarly journals Dynamic control of nutrient-removal from industrial wastewater in a sequencing batch reactor, using common and low-cost online sensors

2015 ◽  
Vol 73 (4) ◽  
pp. 740-745 ◽  
Author(s):  
Jan Dries
Keyword(s):  
Activated Sludge ◽  
Nutrient Removal ◽  
Industrial Wastewater ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Low Cost ◽  
Dynamic Control ◽  
Oxygen Demand ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential

On-line control of the biological treatment process is an innovative tool to cope with variable concentrations of chemical oxygen demand and nutrients in industrial wastewater. In the present study we implemented a simple dynamic control strategy for nutrient-removal in a sequencing batch reactor (SBR) treating variable tank truck cleaning wastewater. The control system was based on derived signals from two low-cost and robust sensors that are very common in activated sludge plants, i.e. oxidation reduction potential (ORP) and dissolved oxygen. The amount of wastewater fed during anoxic filling phases, and the number of filling phases in the SBR cycle, were determined by the appearance of the ‘nitrate knee’ in the profile of the ORP. The phase length of the subsequent aerobic phases was controlled by the oxygen uptake rate measured online in the reactor. As a result, the sludge loading rate (F/M ratio), the volume exchange rate and the SBR cycle length adapted dynamically to the activity of the activated sludge and the actual characteristics of the wastewater, without affecting the final effluent quality.

scholarly journals Removal of Zinc ions from industrial wastewater with wool fibers

2010 ◽  
Vol 7 (3) ◽  
pp. 1193-1201
Author(s):  
Baghdad Science Journal
Keyword(s):  
Acid Concentration ◽  
Contact Time ◽  
Industrial Wastewater ◽  
Metal Ion ◽  
Low Cost ◽  
Zinc Ion ◽  
Ion Concentration ◽  
Natural Material ◽  
Zinc Ions ◽  
Wool Fibers

In this research, the efficiency of low-cost unmodified wool fibers were used to remove zinc ion from industrial wastewater. Removal of zinc ion was achieved at 99.52% by using simple wool column. The experiment was carried out under varying conditions of (2h) contact time, metal ion concentration (50mg/l), wool fibers quantity to treated water (70g/l), pH(7) & acid concentration (0.05M). The aim of this method is to use a high sensitive, available & cheep natural material which applied successfully for industrial wastewater& synthetic water, where zinc ion concentration was reduced from (14.6mg/l) to (0.07mg/l) & consequently the hazardous effect of contamination was minimized.

Removal of high-concentration sulfate ions from industrial wastewater using low-cost modified Jordanian kaolin

2021 ◽  
Vol 231 ◽  
pp. 359-366
Author(s):  
Banan Hudaib ◽  
Ali F. Al-Shawabkeh ◽  
Waid Omar ◽  
Habis Al-Zoubi ◽  
Rund Abu-Zurayk
Keyword(s):  
Industrial Wastewater ◽  
Low Cost ◽  
High Concentration ◽  
Sulfate Ions

scholarly journals Treatment of Landfill Leachate Using Palm Oil Mill Effluent

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 601 ◽  
Author(s):  
Tawfiq J. H. Banch ◽  
Marlia M. Hanafiah ◽  
Salem S. Abu Amr ◽  
Abbas F. M. Alkarkhi ◽  
Mohammed Hasan
Keyword(s):  
Palm Oil ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Agricultural Waste ◽  
Oxygen Demand ◽  
Palm Oil Mill Effluent ◽  
Treatment Efficiency ◽  
Aeration Time ◽  
Urban Solid Waste ◽  
Palm Oil Mill

Sanitary landfilling is the most common method of removing urban solid waste in developing countries. Landfills contain high levels of organic materials, ammonia, and heavy metals, thereby producing leachate which causes a possible future pollution of ground and surface water. Recently, agricultural waste was considered a co-substratum to promote the biodegradation of organics in industrial wastewater. The use of low-cost and natural materials for wastewater treatment is now being considered by many researchers. In this study, palm oil mill effluent (POME) was used for treating stabilized leachate from old landfill. A set of preliminary experiments using different POME/leachate ratios and aeration times was performed to identify the setting of experimental design and optimize the effect of employing POME on four responses: chemical oxygen demand (COD), total suspended solids (TSS), color, and ammoniacal nitrogen (NH3-N). The treatment efficiency was evaluated based on the removal of four selected (responses) parameters. The optimum removal efficiency for COD, TSS, color, and NH3-N was 87.15%, 65.54%, 52.78%, and 91.75%, respectively, using a POME/leachate mixing ratio of 188.32 mL/811.68 mL and 21 days of aeration time. The results demonstrate that POME-based agricultural waste can be effectively employed for organic removal from leachate.

scholarly journals Cyclic Sequential Removal of Alizarin Red S Dye and Cr(VI) Ions Using Wool as a Low-Cost Adsorbent

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 556
Author(s):  
Mustafa I. Khamis ◽  
Taleb H. Ibrahim ◽  
Fawwaz H. Jumean ◽  
Ziad A. Sara ◽  
Baraa A. Atallah
Keyword(s):  
Contact Time ◽  
Industrial Wastewater ◽  
Batch Reactor ◽  
Low Cost ◽  
Alizarin Red S ◽  
Alizarin Red ◽  
Simultaneous Reduction ◽  
Adsorbent Dosage ◽  
Adsorption Data ◽  
Sheep Wool

Alizarin red S (ARS) removal from wastewater using sheep wool as adsorbent was investigated. The influence of contact time, pH, adsorbent dosage, initial ARS concentration and temperature was studied. Optimum values were: pH = 2.0, contact time = 90 min, adsorbent dosage = 8.0 g/L. Removal of ARS under these conditions was 93.2%. Adsorption data at 25.0 °C and 90 min contact time were fitted to the Freundlich and Langmuir isotherms. R2 values were 0.9943 and 0.9662, respectively. Raising the temperature to 50.0 °C had no effect on ARS removal. Free wool and wool loaded with ARS were characterized by Fourier Transform Infrared Spectroscopy (FTIR). ARS loaded wool was used as adsorbent for removal of Cr(VI) from industrial wastewater. ARS adsorbed on wool underwent oxidation, accompanied by a simultaneous reduction of Cr(VI) to Cr(III). The results hold promise for wool as adsorbent of organic pollutants from wastewater, in addition to substantial self-regeneration through reduction of toxic Cr(VI) to Cr(III). Sequential batch reactor studies involving three cycles showed no significant decline in removal efficiencies of both chromium and ARS.

START-UP STRATEGY FOR SBR TREATMENT OF COMPLEX INDUSTRIAL WASTEWATER

1994 ◽  
Vol 30 (3) ◽  
pp. 149-155
Author(s):  
M. Muñiz ◽  
A. G. Lavin ◽  
M. Díaz
Keyword(s):  
Industrial Wastewater ◽  
Low Cost ◽  
Process Efficiency ◽  
Normal Operation ◽  
Organic Load ◽  
Feeding Time ◽  
Good Test ◽  
High Salinity Water ◽  
Start Up ◽  
Complex Organic

In SBR processes, the start-up operation is of considerable interest, not only because of the effect of the efficiency on normal operation, but also because of the cost of the transport of sludge seed and the related feeding time with artificial substrate. The selection of the strategy bas not been studied previously as far as we know, although it is a problem of considerable economic importance. This is not only a problem of the relation between seed magnitude and the start-up timing, but also the effect on the process efficiency. The start-up in SBRs is more frequent than in conventional activated sludge when considering SBRs are mainly used for industrial wastewater treatment, where there are more stops and changes of organic load. A start-up strategy for SBR biological treatment of industrial wastewater with several complex organic components, based on two steps (Filling and Conditioning Periods), bas been proposed and put into operation in a pilot plant column. The strategy looks for minimum time to achieve high steady state efficiency, and low cost of implementation, and sludge seeding. It makes a provision for feed on the basis of inhibition potential and organic needs, and introduces instructions during the operation, depending on the results being obtained. The results of this strategy using a complex organic high salinity water are presented. The presence in this case of two types of solvents and very high salts concentration has been a good test problem for the proposed strategy because of the necessity of multiple adaptation of sludge and the considerably difficult problem to be solved.

Sorption of Copper and Zinc from Aqueous Solutions by Microwave Incinerated Sugarcane Bagasse Ash (MISCBA)

2016 ◽  
Vol 835 ◽  
pp. 378-385 ◽  
Author(s):  
Ibrahim Umar Salihi ◽  
Shamsul Rahman Mohamed Kutty ◽  
Mohamed Hasnain Isa ◽  
Usman Aminu Umar ◽  
Emmanuel Olisa
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Correlation Coefficient ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Isotherm Model ◽  
Copper And Zinc ◽  
Sugarcane Bagasse Ash

Industrial wastewater containing toxic pollutants such as heavy metals tends to contaminate the environment once it is release without proper treatment. Heavy metals are toxic to both human and other living organisms. It is necessary to treat industrial wastewater polluted with heavy metals prior to its discharge into the receiving environment. In this study, low cost adsorbent was generated from sugarcane bagasse through incineration. The prepared adsorbent “microwave incinerated sugarcane bagasse ash” (MISCBA) was used in removing copper and zinc from aqueous solution. Parameters of importance such as pH, contact time and adsorbent dosages are studied to investigate their effects on the adsorption of copper and zinc. Maximum adsorption was observed at pH 6.0, contact time of 180 minutes and adsorbent dosage of 10 g/L. Zinc removal follows Langmuir isotherm model with correlation coefficient of 0.9291. Copper adsorption follows both Langmuir and Freundlich isotherm model with correlation coefficient of 0.9181 and 0.9742, respectively. Removal capacities of 38.4 mg/g and 20.4 mg/g were obtained for copper and zinc, respectively. Application of MISCBA as low - cost adsorbent have shown significant outcome in removal of copper and zinc from aqueous solution.

A low-cost adsorbent from coal fly ash for mercury removal from industrial wastewater

2017 ◽  
Vol 5 (1) ◽  
pp. 391-399 ◽  
Author(s):  
Mahshid Attari ◽  
Syed Salman Bukhari ◽  
Hossein Kazemian ◽  
Sohrab Rohani
Keyword(s):  
Fly Ash ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Mercury Removal
Sign in / Sign up

Export Citation Format

Share Document