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Septic tank additive impacts on microbial populations.

* In the United States, 25 percent of the total housing units and 33 percent of all new development rely on onsite wastewater treatment.

* The number increases every year as a result of continuous urban and suburban sprawl and the high cost of central sewer systems.

* The increasing popularity of onsite wastewater treatment systems has led to widespread production and use of septic system additives.

* Septic tank additives are promoted extensively across the United States.

* Most biological additives are designed to enhance biological activity in the septic tank through the addition of organisms such as bacteria, enzymes, or both.

* Many homeowners desire information about their effectiveness.

* Very little peer-reviewed and published research exists about the microbial effectiveness of bacterial additives.

* The authors conducted a replicated and controlled field scale experiment to measure the impacts of selected bacterial additives on total microbial populations in septic tanks.

* No significant effect on septic tank bacterial population was found.

* Additional assessments of potential interactions between additives and prior maintenance levels in septic tanks should be studied, however.

* Some interactions were almost significant at the = .05 level.

* Also, the experiment did not attempt to measure the effects of biological additives on concentrations of specific bacterial genera or species or related enzymes.

* In addition, only three of the 1,200+ septic tank additives on the market were assessed in the study.

* Additional replicated, controlled, full-scale field research studies are needed to render the findings conclusive.

This department, Practical Stuff! originated from you, our readers. Many of you have expressed to us that one of the main reasons you read the Journal of Environmental Health is to glean practical and useful information for your everyday work-related activities. In response to your feedback, we dedicate this section to you with salient points to remember about two to three articles in each issue.
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Title Annotation:Practical Stuff!
Publication:Journal of Environmental Health
Date:Jan 1, 2008
Previous Article:Nanotechnology: its impact on food safety.
Next Article:The performance of UASB reactors treating high-strength wastewaters.

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Septic tank additive impacts on microbial populations.

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