Solid Waste

Landfill is Forced to Pay Heavy Penalties When Masking Agent is Unsuccessful at Reducing OdorsCannabis growing odor

The Problem A Pennsylvania landfill using masking agents for years discovered how unsuccessful “covering” odors can be. The Pennsylvania Department of Environmental Protection documented over 200 odor complaints from neighbors of the landfill in just one year. As a result and at significant expense, the site was required to install an enhanced landfill gas collection system with temporary flares to burn off the odorous gas. The site was fined almost $75,000 in civil penalties for past odor violations. Preemptive action on the part of the site to address odor issues would have reduced overall costs and alleviated the bad public relations suffered by the landfill.

The Solution The site has since implemented operational solutions, including the use of Benzaco Scientific vapor phase odor control measures which have reduced odor complaints significantly.

The Results Masking agents DO NOT WORK and may actually compound malodor issues and INCREASE odor complaints. Using a vapor phase odor control system, like the Benzaco Scientific Subtractive Odor Control system of products and equipment, that neutralizes NOT masks or covers odors will ensure Operational Acceptance and save costs.

Cannabis growing odorLandfill in Environmentally Sensitive California Eliminates Odors and Reduces Odor Control Costs by Over 80%

The Problem – Co-composting with sewage sludge caused sensitive odor issues at a California landfill. The handling and drying of the sludge, as well as regular landfill, refuse caused escalating complaints in an, especially environmentally conscious county. Since 1995, the landfill had been attempting to solve these nagging odor issues with a wide variety of odor control methods and delivery systems.

The Objective – Design ONE system to eliminate the odor emissions from the VARIOUS individual operations at the facility.

The Solution – Benzaco Scientific engineers characterized, quantified and prioritized the odor emissions emanating from the individual operations at the site. Based on this evaluation and the identification of specific malodorous compounds, Benzaco Scientific designed and piloted a high-pressure vapor phase control system operating at greater than 500 psi to deliver a complex essential oil odor neutralizing agent.

The Results – Despite being initially skeptical, site personnel were impressed and convinced. The site installed three full-scale systems to cover the entire site. Since that time, odor complaints have dropped off from over 20 a month to less than 2 a year. More importantly, odor control costs have dropped dramatically. The facility was paying almost $200,000 a year for the previous unsuccessful system. Now, less than $12,000 per year.

Cannabis growing odorLandfill Eliminates Nuisance Odors, Saves a Large Revenue Stream and Increases Profits

The Problem – Neighbors surrounding a southwestern Ohio landfill were outraged by the offensive odors emanating from the site’s sludge processing operations. The neighbors complained to local and state regulators every time a load of the offending material was delivered for processing. The site had to do something otherwise they were going to lose the lucrative sludge disposal contract.

The Objective – Eliminate the odors, save the contract and maintain profitability.

The Solution – The landfill’s internal odor experts suggested that the landfill operator contact Benzaco Scientific and enlist their aid to remedy the odor issue. The Benzaco team visited the facility, surveyed the operations, interviewed operating personnel and received an MSDS for the material in question. Based on these factors, the treatment plan was recommended and a trial began immediately with representatives from the local regulatory commission, the EPA and the hauling company on hand.

The Results – The odor is gone! Thanks to a motivated landfill staff and inventive engineering for application from the Benzaco Scientific team, the odors have been eliminated. The landfill is now accepting up to six loads a day of sludge generating a high income stream.

Waste Water

Municipal Sewage Treatment Plant Eliminates Odors and Saves Money Versus its Previous Treatment SchemeCannabis growing odor

The ProblemNeighbors on the surrounding hillsides of this Northeastern Ohio sewage treatment plant were outraged by constant, intensely offensive odors from the plant’s sludge drying operations. The plant’s current treatment was providing only marginal success in controlling odors pouring from the exhaust scrubber. The plant was receiving hundres of calls a week.

The ObjectiveEliminate odors; stop complaints.

The SolutionBenzaco Scientific suggested feeding ODOR-ARMOR® products into the exhaust stack of the scrubber. The operations manager had concerns because the ODOR-ARMOR® was six times the cost of their previous treatment. However…

The ResultsThe odor is gone! No complaints! AND USE COST IS 33% LOWER THAN WITH THE PREVIOUS TREATMENT! The operations manager was ecstatic, “this stuff is liquid gold!”

Green Waste – Composting

CA Waste Facility Eliminates Odor Complaints for Their Organic Green Waste and Sludge Composting OperationCannabis growing odor

The Problem – The large California facility takes in a great deal of green waste (grass clippings, vegetable & fruit waste, leaves and other vegetation) and food processing sludge. It is all combined and recycled into high grade mulch and compost in their site composting operation. The nature of the waste and the composting process leads to the release of high concentrations of odor – especially during the turning of the wind rows. The plant was receiving numerous complaints from the neighbors and citations from the regulators. Already using a low pressure fogging system and product from another vendor, they were getting no relief.

The Objective – Eliminate the odors; stop the complaints; stop the fines.

The Solution – The facility was skeptical. Managers had heard it all before and were spending “too much money” on something ineffective. Benzaco engineers suggested an improvement in the system – high pressure instead of low pressure, to improve application and protability to allow treatment of specific areas at a time. Benzaco then suggested the use of OCC products which are very suited for odors stemming from composting applications. Skepticism remained, however. Benzaco Scientific products were 40% cheaper to use than the ineffective chemicals they were currently using!

The Results – It was a no brainer and it worked! odor complaints were virtually eliminated and costs were reduced! Management was pleasantly surprised and ecstatic.

Food Processing- Waste Water


Cannabis growing odorIowa Pork Processing Plant Eliminates Waste Water Treatment Odor AND Reduces Odor Control Costs

The Problem – Increasing encroachment by new neighbors began causing problems for an Iowa pork processing facility. Though the plant had been there for more than 20 years, new neighbors complained about odors stemming from the waste treatment and composting operations at the plant. The “loud” and frequent complaints of the neighbors brought tremendous regulatory pressure down on the facility. Other odor control options had not worked for the plant. They had tried other methods and vendors to no avail, the odors and the complaints persisted. They needed to find a solution.

The Objective – Create a treatment scheme for the waste treatment lagoons AND the composting operations that would eliminate odors and make the neighbors happy.

The Solution – After a plant survey, Benzaco engineers recommended a perimeter fogging system for the large 150′ x 400′ waste treatment lagoons that would utilize Benzaco’s unique OCC-2000F product blend of neutralizers and added fragrance. Benzaco also recommended OCC-Bel, a unique formulation of activated bacteria and enzymes, for topical application on the composting wind rows. The plant manager was skeptical, “we’ve heard it all before. It doesn’t work for us.”

The Results – The Fourth of July weekend would be the test. Would the Benzaco solution work for the plant? Test results were…A+! No complaints! The odor was eliminated.


Large WI Pork Processing Plant Eliminates Odors, Reduces Maintenance Costs & Saves Money Versus Its Previous Treatment Scheme

The Problem – Neighbors surrounding a pork processing plant in WI were militant about the constant offensive odors wafting into their backyards and businesses from the rendering operation scrubber stack. The plant controlled most odors from other parts of the plant through well executed housekeeping and operational procedures but had only marginal success with the scrubber – the largest and most problematic source. The plant received complaints on a daily basis. The neighbors involved local government to bring greater pressure on the plant. The local health department’s air quality regulators and the state EPA threatened fines. It was critical that the plant eliminate the odors and the complaints. Complicating the issue was a strong corporate agreement with their current national water treament vendor. Change would be difficult even though the program they were using did not work.

The Objective – Eliminate the odors and stop the complaints in the most cost effective way possible.

The Solution – Benzaco Scientific engineers reviewed the entire operation of the scrubber. To increase scrubber efficiency and reduce downtime maintenance, Benzaco suggested a comprehensive treatment scheme for the water side of the scrubber as well as ODOR-ARMOR® for the exhaust stack. Local regulators reviewed the Benzaco solution and gave their approval.

The Results – The odor was eliminated! No complaints! Scrubber cleaning and maintenance was reduced to once per year from once per month. Total costs were reduced and odor control and treatment costs were cut in half! The water treatment vendor is still there but no longer treats for odor.

Other Industry

Cannabis growing odorBenzaco Scientific’s ODOR-ARMOR® Helps Meet Operational Acceptance within a Community

The Problem – Since 1997, a Northeastern United States recycled paper mill has been under the scrutiny of the Department of Enviromental Protection (DEP) for odor complaints from the surrounding community. The neighboring community had the power to close the plant because of the smells. Either the mill resolved the odor problems or the DEP and the community would force the plant to close.

The Objective – In an attempt to eliminate the source of the odors in the plant, the paper mill hired two enviromental engineering firms to recommend changes to the mill processes. In addition, the plant also began discussion with various suppliers for chemical solutions.

The Solution – Benzaco Scientific engineers first addressed the bacteria issues in the plant’s million gallon water system. Site surveys showed bacteria levels were 1,000 times higher than the proper control range. Because of the fatty acids produced by the bacteria, they were a MAJOR source of the malodors at that level. In addition, certain parts of the system were anaerobic, leading to the generation of hydrogen sulfide gases (H2S). Benzaco Scientific’s suggested biological control program was effective in reducing aerobic bacteria by 85% and anaerobic bacteria by 99%.

While the number of odor complaints were reduced significantly, occasional outbreaks of odor resulted in continued pressure from the community and the DEP. Even though biologically induced malodors were in control, other variables were contributing to the odor issues. Volatile fatty acids inherent in the recycled fiber and reaction products caused by de-inking and bleaching.

To remedy the problem, Benzaco Scientific introduced ODOR-ARMOR® odor neutralization technology. Applied to odor vapors as an atomized spray using a high-pressure system, ODOR-ARMOR® reacts to alter the odor molecules, rendering them odorless and imperceptible. Spray nozzles were strategically placed to address problematic areas such as the aeration basin, clarifier, pulp dryer exhaust stack and exhaust fans for the roof and windows. Even the interior plant air was neutralized by applying ODOR-ARMOR® to the process chests and the “man-coolers” managing the air flow between floors.

The Result – The Return on Investment (ROI) for this ODOR-ARMOR® treatment program is black and white. ODOR-ARMOR® treatment allows the plant to stay open by bringing the plant Operational Acceptance (the public’s permission for a facility to operate within a community). The plant manager recognized that as a result of Benzaco Scientific’s program and ODOR-ARMOR® technology, “we’ve come from a community ready to close our doors to an odor that’s barely perceptible over the course of three or four months and staying that way”.