DSP (Dynamic Simulator for Prefermenters) is an advanced PC productivity tool for analyzing the design, operation and optimization of prefermenters in biological nutrient removal (BNR) wastewater treatment plants.

Prefermentation is an increasingly popular unit operation in BNR wastewater treatment plants, used to promote rapid denitrification and biological phosphorus removal in these processes. Its aim is to produce volatile fatty acids (VFAs) which can assist in the BNR process. The bacteria responsible for biological nutrient removal in the wastewater treatment process require soluble organic products such as VFAs for use as an energy and carbon source.

Prefermenter Modeling

Featuring latest modeling technology, DSP allows engineers and plant operators to study optimization of existing prefermenter installations, evaluate operational sensitivities and assess the benefits of adding prefermentation facilities to existing wastewater treatment plants.

DSP is also the first commercially available prefermenter simulator - providing wastewater practitioners for the first time with an analytical tool for the design and operation of prefermenters. To date, prefermenter design and operation has been largely restricted to empirical rules and guidelines - often specific to proprietary designs.

The mathematical model incorporated in the DSP software has been validated on a number of full-scale plants with commonly used prefermenter configurations.  These include static prefermenters, activated primary tank (APT), complete-mix and two-stage prefermenters.

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Operation is as simple as specifying the wastewater influent characteristics (VFA, SCOD, TCOD, TKN and NH4). DSP can then be used to predict prefermenter effluent characteristics and mass of VFAs produced over a range of prefermenter hydraulic and solids residence times (HRT/SRT), reactor size and flow conditions - for use by subsequent BNR processes.

Using DSP, you can:

DSP features

Includes Prefermenter Technology Book...

The DSP package includes a comprehensive Prefermenter Technology Book reviewing latest developments and methodologies for wastewater prefermentation systems, as well as detailing prefermenter modeling and DSP applications.

DSP Applications

Depending on capacity requirements and wastewater composition, there can be major capital costs associated with the design and installation of prefermenter systems. The availability of low-cost simulation software now provides an invaluable tool to assess prefermenter designs and the possible benefits of adding a prefermenter to a BNR plant.

For consultants, plant operators, researchers and academic institutes, DSP also provides a means to gain useful and up-to-date industry knowledge on prefermenter technology.

For day-to-day plant operations, wastewater plants are coming under increasing legislative and environmental requirements to control phosphorus and nitrogen levels in plant effluent - prefermentation can play a key role in reducing these levels.