Microscopic Observation Various types of stains can be used on a routine basis, to qualitatively assess microscope slide Video camera attached to a microscope and transmitted to a computer are dependent on the computer software, the mean, minimum, and maximum diameter, length to width ratio. the circumference. the surface area. the volume. and the centroid. Particle imaging greatly reduces the time required but the cost of the software and equipment is often prohibitive for many small laboratories
Microscopic Observation Various types of stains can be used on a routine basis, to qualitatively assess microscope slide. Video camera attached to a microscope and transmitted to a computer are dependent on the computer software , the mean, minimum, and maximum diameter, length to width ratio, the circumference, the surface area, the volume, and the centroid . Particle imaging greatly reduces the time required but the cost of the software and equipment is often prohibitive for many small laboratories
Turbidity Turbidity, a measure of the light-transmitting properties of water, is another test used to indicate the quality of waste discharges and natural waters with respect to colloidal and residual suspended matter The results of turbidity measurements are reported as nephelometric turbidity units(NTU) It should be noted that the presence of air bubbles in the fluid will cause erroneous turbidity readings. In general there is no relationship between turbidity and the concentration of total suspended solids in untreated wastewater
Turbidity Turbidity, a measure of the light-transmitting properties of water, is another test used to indicate the quality of waste discharges and natural waters with respect to colloidal and residual suspended matter. The results of turbidity measurements are reported as nephelometric turbidity units (NTU). It should be noted that the presence of air bubbles in the fluid will cause erroneous turbidity readings. In general, there is no relationship between turbidity and the concentration of total suspended solids in untreated wastewater
There is, however, a reasonable relationship between turbidity and total suspended solids for the settled and filtered secondary effluent from the activated sludge roce The conservation factors for settled secondary effluent and for secondary effluent filtered with a granular-medium depth filter will typically vary from 2.3 to 2. 4 and 1.3 to 1.6, respectively However, turbidity readings at a given facility can be used for process control. Some on line turbidity meters used to monitor the performance of microfiltration units are affected by the air used to clean the membranes
There is, however, a reasonable relationship between turbidity and total suspended solids for the settled and filtered secondary effluent from the activated sludge process. The conservation factors for settled secondary effluent and for secondary effluent filtered with a granular-medium depth filter will typically vary from 2.3 to 2.4 and 1.3 to 1.6, respectively. However, turbidity readings at a given facility can be used for process control. Some on line turbidity meters used to monitor the performance of microfiltration units are affected by the air used to clean the membranes
Color Condition refers to the age of the wastewater, which is determined qualitatively by its color and odor. Fresh wastewater is usually a brownish-gray color, sequentially from gray to dark gray, and ultimately to black that is often described as septic wastewater is due to the formation of metallic sulfide a In most cases, the gray, dark gray, and black color of th which form as the sulfide produced under anaerobic conditions reacts with the metals in the wastewater
Color Condition refers to the age of the wastewater, which is determined qualitatively by its color and odor. Fresh wastewater is usually a brownish-gray color ,sequentially from gray to dark gray, and ultimately to black that is often described as septic. In most cases, the gray, dark gray, and black color of the wastewater is due to the formation of metallic sulfides, which form as the sulfide produced under anaerobic conditions reacts with the metals in the wastewater
Absorption/Transmittance The absorbance measured using a spectrophotometer and a fixed path length(usually 1.0 cm) is a measure of the amount of light, of a specified wave-length, The factors that affect the percent transmission include elected inorganic compounds(e.g, copper; iron, etc.) organic compounds(e.g, organic dyes, humic substances, and conjugated ring compounds such as benzene and toluene), and TSS Iron is considered to be the most important with respect to uV absorbance because dissolved iron can absorb uv solids, bacterial clumps and other organic compounds ded light directly and because iron will adsorb onto suspend
Absorption/Transmittance The absorbance measured using a spectrophotometer and a fixed path length (usually 1.0 cm) is a measure of the amount of light, of a specified wave-length, The factors that affect the percent transmission include selected inorganic compounds (e.g., copper; iron, etc.), organic compounds (e.g., organic dyes, humic substances, and conjugated ring compounds such as benzene and toluene), and TSS. Iron is considered to be the most important with respect to UV absorbance because dissolved iron can absorb UV light directly and because iron will adsorb onto suspended solids, bacterial clumps and other organic compounds