scholarly journals Evaluation of the Effects of Chemically Enhanced Primary Treatment on Landfill Leachate and Sewage Co-treatment in Publicly Owned Treatment Works

2020 ◽  
Author(s):  
Harsh Patel ◽  
Brian Brazil ◽  
Helen Lou ◽  
ManoJ Jha ◽  
Stephanie Luster-Teasley ◽  
...  
Keyword(s):  
Organic Matter ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Landfill Leachate ◽  
Primary Treatment ◽  
High Dose ◽  
Uv Absorbance ◽  
Publicly Owned Treatment Works ◽  
Chemically Enhanced Primary Treatment ◽  
Better Than

The objective of this study was to evaluate the effects of CEPT for leachate and sewage co-treatment in a POTW. The results showed that ferric and aluminum coagulants remove about 54 - 74% organic matter where ferric performed better than aluminum coagulant. However, ferric coagulant was found to exacerbate the UV absorbance after coagulation at high dose due to the interaction with dissolved organic matter by forming soluble transition metal complexes. These organo-metal complexes have been found to increase the UV absorbance and this study provides the scientific background for such phenomenon.<br>

scholarly journals Evaluation of the Effects of Chemically Enhanced Primary Treatment on Landfill Leachate and Sewage Co-treatment in Publicly Owned Treatment Works

2020 ◽  
Author(s):  
Harsh Patel ◽  
Brian Brazil ◽  
Helen Lou ◽  
ManoJ Jha ◽  
Stephanie Luster-Teasley ◽  
...  
Keyword(s):  
Organic Matter ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Landfill Leachate ◽  
Primary Treatment ◽  
High Dose ◽  
Uv Absorbance ◽  
Publicly Owned Treatment Works ◽  
Chemically Enhanced Primary Treatment ◽  
Better Than

The objective of this study was to evaluate the effects of CEPT for leachate and sewage co-treatment in a POTW. The results showed that ferric and aluminum coagulants remove about 54 - 74% organic matter where ferric performed better than aluminum coagulant. However, ferric coagulant was found to exacerbate the UV absorbance after coagulation at high dose due to the interaction with dissolved organic matter by forming soluble transition metal complexes. These organo-metal complexes have been found to increase the UV absorbance and this study provides the scientific background for such phenomenon.<br>

Study on Chemical Enhanced Primary Treatment of Sewage

2013 ◽  
Vol 464 ◽  
pp. 189-193
Author(s):  
Jun Hong Luo ◽  
Chong Hao Huang ◽  
Yong Zhang
Keyword(s):  
Organic Matter ◽  
Removal Efficiency ◽  
Primary Treatment ◽  
Pollution Load ◽  
Low Costs ◽  
Chemically Enhanced Primary Treatment

Chemically enhanced primary treatment (CEPT) process have advantages of low pollution load and low costs, it can greatly improve the removal efficiency of organic matter by primary treatment , so the process has been studied widely and intensively. In this thesis, the mechanism, coagulant type, dosage and precipitation time were studied.

Characterization of ultraviolet-quenching dissolved organic matter (DOM) in mature and young leachates before and after biological pre-treatment

2018 ◽  
Vol 4 (5) ◽  
pp. 731-738 ◽  
Author(s):  
Renzun Zhao ◽  
Chanil Jung ◽  
Alicja Trzopek ◽  
Kevin Torrens ◽  
Yang Deng
Keyword(s):  
United States ◽  
Organic Matter ◽  
Landfill Leachate ◽  
Management Practice ◽  
The United States ◽  
Publicly Owned Treatment Works ◽  
Before And After ◽  
Leachate Management ◽  
Pre Treatment

The discharge of municipal landfill leachate into publicly owned treatment works (POTWs) is a common leachate management practice in the United States.

Ferric coagulant recovered from coagulation sludge and its recycle in chemically enhanced primary treatment

2009 ◽  
Vol 60 (1) ◽  
pp. 211-219 ◽  
Author(s):  
G. R. Xu ◽  
Z. C. Yan ◽  
N. Wang ◽  
G. B. Li
Keyword(s):  
Cost Effective ◽  
Primary Treatment ◽  
Treated Wastewater ◽  
Turbidity Removal ◽  
Wastewater Quality ◽  
Pollutants Removal ◽  
Chemically Enhanced Primary Treatment ◽  
Coagulant Recovery ◽  
Chemical Sludge ◽  
Better Than

An investigation was conducted to study the feasibility of ferric coagulant recovery from chemical sludge and its recycle in chemically enhanced primary treatment (CEPT) to make the process more cost-effective, as well as reduce sludge volume. The optimum conditions and efficiency of the acidification for ferric coagulant recovery from coagulation sludge were investigated. Experimental results showed that the recovered coagulants can be used in CEPT and the pollutants removal efficiency is similar to that of fresh coagulant, and for some aspects the effect of recovered coagulants is better than that of fresh ones, such as turbidity removal. Although some substances will be enriched during recycle, they have little effect on treated wastewater quality. Acidification condition also had significant influence on reduction of sludge volume. The efficiency of coagulant recovery had a linear relationship with sludge reduction. Experiments verify that it would be a sustainable and cost-effective way to recover ferric coagulant from coagulation sludge in water treatment and chemical wastewater treatment, and then recycle it to CEPT, as well as reduce sludge volume.

Mechanochemical changes on cyclometalated Ir(iii) acyclic carbene complexes – design and tuning of luminescent mechanochromic transition metal complexes

2020 ◽  
Vol 7 (3) ◽  
pp. 786-794 ◽  
Author(s):  
Jingqi Han ◽  
Kin-Man Tang ◽  
Shun-Cheung Cheng ◽  
Chi-On Ng ◽  
Yuen-Kiu Chun ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Carbene Complexes ◽  
New Class

A new class of luminescent cyclometalated Ir(iii) complexes with readily tunable mechanochromic properties derived from the mechanically induced trans-to-cis isomerization have been developed.

Density Functional Calculations of EPR Parameter g Tensors of Some Transition Metal Complexes

2011 ◽  
Vol 2 (2) ◽  
pp. 139-141
Author(s):  
Vinita Prajapati ◽  
◽  
P.L.Verma P.L.Verma ◽  
Dhirendra Prajapati ◽  
B.K.Gupta B.K.Gupta
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Density Functional Calculations ◽  
Density Functional
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