Treatability study (column study and pilot study)
Sorption media with mixes of some recycled materials, such as sawdust and tire crumbs, combined with sand/silt and limestone, were examined the physicochemical process for nutrient removal. Within a suite of batch tests, pollutants of concern include ammonia, nitrite, nitrate, orthophosphate, total dissolved phosphorus, etc. The potential for application in stormwater management facilities, such as dry ponds, was emphasized in terms of life expectancy and removal efficiency. When compared with the natural soil that was selected as the control case in the column tests, our “green sorption media mixture” with respect to three types of sorption, including adsorption, absorption, and ion exchange, proved relatively effective in terms of removing most of the target pollutants under various influent waste loads.
Baffle box with nutrient removal
On-site sewage treatment and disposal systems (OSTDSs) are oftentimes used to treat human waste accruing from nearly one-third of the U.S. population. Operation of OSTDS contributes a large fraction of nutrient loads to groundwater aquifers. The baffle box was built to mimic the OSTDS underground drain field packed with new “green sorption medium”. Under the hydraulic retention time of 24 h in a laboratory-scale microcosm of unique functional design, removal efficiencies were found significant for all pollutants of concern. It showed 55% removal efficiency of nitrates and 89% of phosphorus under a hydraulic retention time of 24 h. With the aid of Langmuir isotherm data, the theoretical life expectancy of the proposed sorption media mix used in the microcosm was estimated to be 1.2 years for phosphorus sorption.
Hach DR 2800 Portable spectrophotometer
The Hach DR 2800 Portable spectrophotometer can be used for more than 240 analytical methods, capable of measuring the following substances or characteristics: alachlor; aluminum; arsenic; atrazine; barium; benzotriazole; boron; bromine; cadmium; chloride; chlorine dioxide; chlorine; chromium; cobalt; color; copper; cyanide; cyanuric acid; dissolved oxygen; fluoride; formaldehyde; hardness; hydrazine; iodine; iron; lead; manganese; mercury; molybdenum/molybdate; monochloramines; nickel; nitrogen (as ammonia, nitrate, nitrite, total nitrogen, total Kjeldahl nitrogen); chemical oxygen demand; oxygen scavengers; ozone; polychlorinated biphenyls; phenols; phosphonates; phosphorus; potassium; quaternary ammonium compounds; selenium; silica; silver; sulfate; sulfide; surfactants; suspended solids; tannin and lignin; total organic carbon; tolyltriazole; total petroleum hydrocarbons; ntrihalomethanes; toxicity; volatile acids; and zinc.
Hach DR 2800 Portable spectrophotometer
The Hach DR 2800 Portable spectrophotometer can be used for more than 240 analytical methods, capable of measuring the following substances or characteristics: alachlor; aluminum; arsenic; atrazine; barium; benzotriazole; boron; bromine; cadmium; chloride; chlorine dioxide; chlorine; chromium; cobalt; color; copper; cyanide; cyanuric acid; dissolved oxygen; fluoride; formaldehyde; hardness; hydrazine; iodine; iron; lead; manganese; mercury; molybdenum/molybdate; monochloramines; nickel; nitrogen (as ammonia, nitrate, nitrite, total nitrogen, total Kjeldahl nitrogen); chemical oxygen demand; oxygen scavengers; ozone; polychlorinated biphenyls; phenols; phosphonates; phosphorus; potassium; quaternary ammonium compounds; selenium; silica; silver; sulfate; sulfide; surfactants; suspended solids; tannin and lignin; total organic carbon; tolyltriazole; total petroleum hydrocarbons; ntrihalomethanes; toxicity; volatile acids; and zinc.
AquaFluor® Handheld Fluorometer
AquaFluor® handheld fluorometer supports a simple, quick and inexpensive way to measure chlorophyll-a, dissolved organic matter (CDOM) and fluorescent dye (like Rhodamine WT) in waters