بازيابي بهينه آب با تأکيد بر نرخ مصرف فلوکولانت در تغليظ‌کننده Optimal Water Recovery with Emphasis on Flocculant Consumption Rate in the Thickener
Journal Title: آب و فاضلاب - Year 2017, Vol 28, Issue 5
Abstract
Optimal Water Recovery with Emphasis on Flocculant Consumption Rate in the Thickener Water plays a vital role in mineral processing as evidenced by the approximately 2 to 3 tons of water used for the treatment of one ton of ore. A major portion of this water may be recovered in thickeners. This study aimed to control the wet tailings output of the Hematite Gol-e-Gohar plant by changing flocculant dosage and type and solid percentage in the feed in order to enhance effluent clarity and reduce water consumption. Materials and A series of settling experiments were performed using different combinations of the flocculants (A25, A26 Yazd, A26 Esfahan, A27, and A28), flocculant doses (20, 25, 30, 35, and 40 gr/ton), and solid loads in the feed (5, 7, 9, 10, and 11%) to the thickener. The L25 Taguchi design method was chosen to handle the five different levels of the three factors. Adopting a 95% confidence interval, the results of analysis of variance (ANOVA) revealed that flocculant consumption rate had a high effect on settling velocity (p= 0.006) while flocculant type and solid percentage in the feed had no significant effects. Moreover, it was found that A26 (Akhtar-chemistry Company, Yazd) used at a rate of 40 g/ton improved the settling performance to yield an optimal water clarity. Using the findings of this study in process planning at the plant led to a considerable reduction (from the original 0.86 to 0.49 m3) in average water consumption per ton of input material so that the solid content of the thickener underflow rose from 7 to 45%.
Authors and Affiliations
Marzieh Hosseininasab, Rouhollah Rezazadeh
Keywords
Related Articles
- EP ID EP259159
- DOI 10.22093/wwj.2017.45363
- Views 81
- Downloads 0
بررسی کارايی فرايند شناورسازی با هوای محلول در حذف آنيلين از محيط‌های آبی
Investigating the Efficiency of Dissolved Air Flotation Process for Aniline Removal from Aquatic Environments Abstract Aniline is an almost undegradable compound found in many industrial effluents. It was the objectiv...
بررسي کارايي گياه ساليکورنيا اروپايي در گياه‌پالايي نمک از محلول‌ها Efficiency of Salicornia Europea in Phytoremediation of Salt in Saline Water
Efficiency of Salicornia Europea in Phytoremediation of Salt in Saline Water Abstract Halophytes are plants able to tolerate high salt concentrations. Among the many applications they have found, one is the phytoremedi...
مقایسه هزینه- اثربخشی سیستم‌های لجن فعال با سیستم‌های طبیعی تصفیه فاضلاب در استان کرمانشاه
Comparison of the Cost-effectiveness of Activated Sludge Systems with Natural Wastewater Treatment Systems in Kermanshah Province Abstract To determine the economic feasibility of wastewater treatment plants requires me...
ارزيابي تجارت آب مجازي در بخش صنعت استان زنجان
Evaluation of Virtual Water Trade in the Industrial Sector of Zanjan Province Abstract Water crisis is of utmost importance due to the growing demand and consumption of water, especially in developing countries where...
Investigation of Porous Structures for Protection of Pipelines against Water Hammer به‌کارگيري ساختارهاي متخلخل براي حفاظت خط لوله در مقابل ضربه قوچ
Abstract This study was initiated to investigate the use of a porous structure in some parts of a pipeline to protect it against water hammer pressure wave. This study was inspired by the utilization of porous breakwate...