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Title: Biological phosphorous removal from impacted water
Authors: Jung, Carina M.
Eberly, Jed O.
Keywords: Water--Pollution
Nutrient pollution of water
Water quality
Water--Purification--Biological treatment
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/EL TR-18-8
Abstract: Nutrient input into waterways from agriculture runoff, sewage, and other sources is a major cause of water pollution and cultural eutrophication. Nitrogen and phosphate are growth-limiting nutrients, that when present in high concentrations, allow for unchecked growth of cyanobacteria, resulting in reduced water quality and the potential for proliferation of harmful algal blooms (HABs). Physical removal of these nutrients from waterways is needed. Immobilized phosphorous accumulating bacteria could be used as a phosphate biofilter to absorb and accumulate phosphate from impacted water. The research presented herein demonstrates the immobilization or encapsulation of phosphate accumulating bacteria in a silica sol-gel matrix that can be suspended in a high phosphate water system and then retrieved to collect excess phosphate (PO₄). Growth and PO₄ uptake was monitored in free-living and sol gel immobilized, pure cultures of the phosphate hyperaccumulating bacterium Microlunatus phosphovorus. Phosphate was accumulated at a rate of 3.3 parts-per-million (ppm) PO₄ /h (1.11 mmol P/h) and 80 mmol P/g cell dry wt/h, respectively. Application of immobilized cells to phosphate impacted waters for uptake and removal of phosphate would allow for large-scale removal of phosphate, thus reducing the eutrophication effect and limiting the potential for HABs.
Description: Technical Report
Gov't Doc #: ERDC/EL TR-18-8
Rights: Approved for Public Release; Distribution is Unlimited
Size: 25 pages / 1.98 Mb
Types of Materials: PDF/A
Appears in Collections:Technical Report

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