In the third phase of biological treatment combined with air oxidation using organisms present in the waste-water after sedimentation all the 11 samples (100 %) characterized for biological oxygen demand
(BOD) Parameter were in the limits of National Environmental Quality Standards (NEQS) and were suitable for disposal into the local water bodies.
If propylene glycol then ends up in lakes and rivers it can significantly increase the biological oxygen demand
meaning that aquatic organisms including fish that also require oxygen can suffer.
The chemical factors determined include salinity, conductivity, dissolved oxygen (DO) and biological oxygen demand
Organic compounds add biological oxygen demand
(BOD) and are of particular concern as they are eventually broken down chemically or biochemically.
Water samples were taken from the sites and the different selected parameters were used for water analysis including pH, Biological Oxygen Demand
(BOD), Chemical Oxygen Demand (COD), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Chloride and Sulphate.
In technical terms it is referred to as high Biological Oxygen Demand
(BOD), which robs the waters of its life-sustaining capacity.
The vital chemical aspects of good water are: Biological oxygen demand
(BOD), Chemical oxygen demand (COD) and the value of Totally Dissolved Solids (TDS) of less than 100 to 250 ppm for drinking water and less than 2000 ppm for industrial effluent discharge.It must also retain a pH of between 6.5 to 7.5.
Parameters values Colour Reddish brown Odour Pungent pH 8.5 Alkalinity (mg/l) 2,000 Total hardness (mg/l) 440 Calcium (mg/l) 380 Magnesium (mg/l) 280 Chlorides (mg/l) 7,384 Dissolved oxygen (mg/l) Nil Biological oxygen demand
(mg/l) 8,410 Total solids (mg/l) 88,610 Total dissolved solids (mg/l) 67,285 Table 2: Physicochemical characteristics of different day of partially treated distillery leachate.
The Blackstone River is on the state's list of impaired water bodies owing to high biological oxygen demand
and suspended solid readings, which come mostly from wastewater treatment effluents and urban runoff and heavy metals from industrial waste, according to Donna Williams, conservation advocacy coordinator at Massachusetts Audubon's Broad Meadow Brook Wildlife Sanctuary and Conservation Center.
The HiPAF system, working in conjunction with a tertiary sand filter, produces treated effluent with Biological Oxygen Demand
(BOD) level sub 10mg/l and Suspended Solids (SS) level sub 10mg/l.
A leading manufacturer of decaffeinated and specialty teas reduces biological oxygen demand
(BOD) levels with a liquid solid separator.
It is also possible to use TOC to monitor CBOD (carbonatious Biological Oxygen Demand