Remediation and recycling of chromium from tannery wastewater using combined chemical–biological treatment system

2016 ◽  
Vol 104 ◽  
pp. 1-10 ◽  
Author(s):  
Engy Ahmed ◽  
Hesham M. Abdulla ◽  
Amr H. Mohamed ◽  
Ahmed D. El-Bassuony
Keyword(s):  
Biological Treatment ◽  
Treatment System ◽  
Tannery Wastewater ◽  
Biological Treatment System

scholarly journals Treatment of tannery wastewater using aluminium formate: influence of the formate over sulphate based coagulant

2018 ◽  
Vol 20 (3) ◽  
pp. 458-464 ◽  
Keyword(s):  
Biological Treatment ◽  
Treatment System ◽  
Tannery Wastewater ◽  
Counter Anion ◽  
Aluminium Sulphate ◽  
Turbidity Removal ◽  
Mechanistic Approach ◽  
Coagulant Activity ◽  
Pre Treatment ◽  
Biological Treatment System

<p>Tannery industries provoke the conspicuous quantity of deleterious effluent which has to be treated prior to discharge into the environment. Pre-treatment of tannery wastewater with aluminium sulphate is well known over decades, but due to the corrosive nature of sulphate this pre-treated water causes several issues in the biological treatment system. To overcome this issue a study was performed to understand the coagulant activity of aluminium formate and aluminium sulphate. The effect of coagulant activity as a function of pH and coagulant dose of Aluminium formate was studied and found that it surpassed aluminium sulphate in terms of Cr(VI), sulphate and COD removal by 10%, 6% and 10% respectively, while turbidity removal for both coagulants was found approximately equal. Possible mechanistic approach to the coagulation property of aluminium formate and aluminium sulphate could be inter particle bridging and sweep coagulation respectively. Formate [HCOO-] can be utilized as a counter anion in the place of commonly used sulphate anions as it is biodegradable, non-toxic and corrosive free compound. Therefore, Aluminium formate can be a promising coagulant for the pre-treatment of tannery wastewater.</p>

Chemical Solubilization of Particulate Organics as a Pretreatment Approach

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2289-2292 ◽  
Author(s):  
S. R. Mukherjee ◽  
A. D. Levine
Keyword(s):  
Enzymatic Hydrolysis ◽  
Alkaline Hydrolysis ◽  
Industrial Waste ◽  
Biological Treatment ◽  
Organic Waste ◽  
Experimental Studies ◽  
Organic Content ◽  
Treatment System ◽  
Chemical Pretreatment ◽  
Biological Treatment System

The first step degradation of particulate organic waste is solubilization. In a bioreactor, solubilization occurs due to enzymatic hydrolysis. As an alternative, the use of chemical solubilization methods may provide a means of more efficiently solubilizing the particulates to a form that can be readily utilized by a biological treatment system. In this study, an industrial waste high in particulate organic content was used as a test substrate. The chemical pretreatment methods tested were alkaline hydrolysis, oxidation, and a mixture of hydrolysis and oxidation. Experimental studies to elucidate the effects of chemical pretreatment on the characteristics of particulate organics are discussed in this paper.

Development of an advanced biological treatment system applied to the removal of nitrogen and phosphorus using the sludge ceramics

2005 ◽  
Vol 39 (20) ◽  
pp. 4859-4868 ◽  
Author(s):  
Yufang Yang ◽  
Yuhei Inamori ◽  
Hitoshi Ojima ◽  
Hiroki Machii ◽  
Yasutoshi Shimizu
Keyword(s):  
Biological Treatment ◽  
Treatment System ◽  
Nitrogen And Phosphorus ◽  
Biological Treatment System
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