RVE was well represented at the New Jersey Water Environment Association (NJWEA) conference in Atlantic City on May 7 through May 11. In addition to exhibiting at our booth with Water Resource Management (WRM), RVE employees presented on two timely topics.
Formaldehyde Emissions from Combustion Sources and its Contribution Toward Volatile Organic Compounds and Hazardous Air Pollutants
Senior Project Engineer Richard Cestone, PE, CHMM examined one of the most common emissions from combustion sources—formaldehyde—as a product of incomplete combustion. Formaldehyde, a compound similar to carbon monoxide, is a toxic pollutant and is classified as a Volatile Organic Compound (VOC) which can contribute to the formation of ozone. USEPA warrants facilities that have combustion sources to monitor formaldehyde emissions and are urging state agencies to do the same. VOCs currently are measured as Non-Methane Hydrocarbons (NMHC) which is the difference of two tests EPA Methods 25A for Total Hydrocarbons and EPA Method 18 for Methane. It has been discovered that Method 25A does not include formaldehyde and similar compounds. Because of this, USEPA is encouraging State agencies including New Jersey DEP to require an additional formaldehyde stack test to add to the NMHC for a more accurate measure of VOCs.
The presentation discussed determining VOC potential to emit and how formaldehyde can be incorporated as well as specific stack tests for VOC and formaldehyde emissions. The abstract was published in NJWEA’s Effluents magazine. For more information contact Richard Cestone.
Beneficial Reuse of GCUA Biosolids as Alternative Daily Cover
Gautam Patwardhan, Ph.D., PE, Project Engineer discussed a wastewater treatment plant upgrade. Gloucester County Utilities Authority (GCUA) owns and operates a wastewater treatment plant and incinerates residual sludge in two 20-year-old incinerators which, due to federal air regulations, required a reduction of emissions by March 16, 2016. GCUA analyzed the options for compliance and determined that the installation of pollution control devices and continuation of the incineration process is neither cost effective nor environmentally efficient. GCUA proposed to install two egg shaped anaerobic digesters, along with accessory equipment and a combined heat and power facility, to replace the incinerators.
The plant upgrade offers potential savings in O&M costs, cogeneration capabilities, and a stabilized end product that can be beneficially reused. The biosolids—nutrient-rich organic materials resulting from the treatment of domestic sewage in a treatment facility—generated as part of the digestion process are currently being evaluated for potential use as alternative daily cover at the Gloucester County Improvement Authority (GCIA) Sanitary Landfill. The full-scale trial is currently ongoing and the results are encouraging. For more information contact Gautam Patwardhan.