COD On-Line Monitoring Based on Photometric

2012 ◽  
Vol 616-618 ◽  
pp. 1930-1934
Author(s):  
Mo Jie Sun ◽  
Xing Shuang Wei ◽  
Wei Zhang ◽  
Song Liu
Keyword(s):  
Chemical Oxygen Demand ◽  
Incident Light ◽  
Photovoltaic Cells ◽  
Oxygen Demand ◽  
Organic Substances ◽  
Photoelectric Conversion ◽  
Important Indicator ◽  
Real Time Clock ◽  
On Line

The chemical oxygen demand (COD) is an important indicator of the characterization of organic substances in water content, reflecting the situation of water pollution. This system takes the IC, A/D and AT89C52 as key module, according to Lambert-Bill’s law and colorimetric principle, uses silicon photovoltaic cells and operational amplifier to realize photoelectric conversion. Incident light and transmitted light intensity of liquid are measured. The microcontroller can be automatically calculated the solution of the chemical oxygen demand (COD) value. The system also has real-time clock, over-range alarm and other functions.

Treatment of slaughterhouse plant wastewater by using a membrane bioreactor

2011 ◽  
Vol 64 (1) ◽  
pp. 214-219 ◽  
Author(s):  
Levent Gürel ◽  
Hanife Büyükgüngör
Keyword(s):  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Membrane Bioreactor ◽  
Nitrate Nitrogen ◽  
Oxygen Demand ◽  
Organic Substances ◽  
Slaughterhouse Wastewater ◽  
Treated Effluent ◽  
Nitrogen Concentrations ◽  
Removal Efficiencies

The use of a membrane bioreactor (MBR) for removal of organic substances and nutrients from slaughterhouse plant wastewater was investigated. The chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) concentrations of slaughterhouse wastewater were found to be approximately 571 mg O2/L, 102.5 mg/L, and 16.25 mg PO4-P/L, respectively. A submerged type membrane was used in the bioreactor. The removal efficiencies for COD, total organic carbon (TOC), TP and TN were found to be 97, 96, 65, 44% respectively. The COD value of wastewater was decreased to 16 mg/L (COD discharge standard for slaughterhouse plant wastewaters is 160 mg/L). TOC was decreased to 9 mg/L (TOC discharge standard for slaughterhouse plant wastewaters is 20 mg/L). Ammonium, and nitrate nitrogen concentrations of treated effluent were 0.100 mg NH4-N/L, and 80.521 mg NO3-N/L, respectively. Slaughterhouse wastewater was successfully treated with the MBR process.

On-line Monitoring Technology for Chemical Oxygen Demand Based on Full-spectrum Analysis

2012 ◽  
Vol 41 (8) ◽  
pp. 883-887 ◽  
Author(s):  
冯巍巍 FENG Wei-wei ◽  
李玲伟 LI Ling-wei ◽  
李未然 LI Wei-ran ◽  
孙西艳 SUN Xi-yan ◽  
付龙文 FU Long-wen ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Spectrum Analysis ◽  
Oxygen Demand ◽  
Full Spectrum ◽  
Monitoring Technology ◽  
On Line

Characterization of Landfill Leachates by Molecular Size Distribution, Biodegradability, and Inert Chemical Oxygen Demand

2009 ◽  
Vol 81 (5) ◽  
pp. 499-505 ◽  
Author(s):  
Míriam C. S. Amaral ◽  
Cynthia F. A. Ferreira ◽  
Liséte Celina Lange ◽  
Sérgio F. Aquino
Keyword(s):  
Chemical Oxygen Demand ◽  
Size Distribution ◽  
Oxygen Demand ◽  
Molecular Size ◽  
Landfill Leachates ◽  
Molecular Size Distribution
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