LysteCarb Alternative Carbon Source

Biological Nutrient Removal (BNR) refers to wastewater processes designed to remove nutrients, above the assimilative capacity of microorganisms. BNR involves two processes: biological nitrogen removal and enhanced biological phosphorus removal (EBPR).

A good BNR system can provide significant, positive impact on effluent water quality, by reducing solids, carbon, nitrogen (N), and phosphorus (P) concentrations in discharged water.

Eutrophication of lakes and estuaries due to the level of nitrogen (N) and phosphorus (P) in wastewater effluent discharges are a significant concern.

Many jurisdictional regulators are evaluating these effects and reducing the allowable levels of N and P in wastewater discharges. BNR systems reduce the amount of N and P discharged to water bodies from wastewater effluent. As a result, an increasing number of Biological Nutrient Removal (BNR) systems are being deployed at wastewater treatment plants (WWTPs).

The ratio of COD:N and COD:P is such that there is a significant quantity of additional carbon that can be utilized for N/P removal.

The COD:N and COD:P ratios in LysteCarb will be dependent upon upstream processes at the plant. We will evaluate these facility specific ratios to determine LysteCarb refeed rates.

In full-scale demonstrations, we have returned up to 30% of the total hydrolyzed product to the plant's BNR system with no operational issues observed.

Prior to recommending a LysteCarb application, the WWTP's clarification capacity is evaluated as a relatively small quantity of additional inert solids will be returned to the BNR system.