skip to main content

Title: Integrating dairy manure for enhanced resource recovery at a WRRF: Environmental life cycle and pilot‐scale analyses
Abstract Practitioner points

Wastewater carbon recovery via anaerobic digestion with combined heat/power production significantly reduces water resource recovery facility (WRRF) environmental emissions.

Wastewater phosphorus recovery is of value; however, struvite production exhibits negative environmental impacts due to MgO2production emissions.

Bioplastics production on imported organic‐rich agri‐food waste can diversify the WRRF portfolio.

Dairy manure can be successfully integrated into a WRRF for bioplastics production without compromising WRRF performance.

Diversifying the WRRF products portfolio is a strategy to maximize resource recovery from wastewater while concurrently achieving environmental sustainability.

more » « less
Award ID(s):
Author(s) / Creator(s):
Publisher / Repository:
Wiley Blackwell (John Wiley & Sons)
Date Published:
Journal Name:
Water Environment Research
Page Range / eLocation ID:
p. 2034-2050
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. Abstract Practitioner points

    Fixed‐bed columns with DOW‐HFO, DOW‐Cu, or DOW‐HFO‐Cu—can selectively remove phosphorus over competing anions.

    Fixed‐bed columns of above‐listed ion exchangers can produce an effluent P < 6 μg/L.

    DOW‐Cu fixed‐bed column ran for ≈500 Bed Volumes before breakthrough when fed Dartmouth WWTP secondary effluent.

    Regeneration of the exhausted DOW‐Cu column resulted in ≈90% recovery of the phosphorus.

    Regenerant solution was used to generate high‐purity crystals of magnesium ammonium phosphate, MgNH4PO4(struvite), a slow‐release fertilizer.

    more » « less
  2. Abstract Practitioner points

    Evaluated alone τANexhibits no statistical effect on effluent phosphorus in an EBPR configuration.

    Increased PHA synthesis, associated with increased VFAs and/or extended τAN,enhances aerobic phosphorus removal.

    PHA synthesis normalized to VFA loading increased with τAN, suggesting fermentation in the EBPR anaerobic zone.

    Aerobic phosphorus uptake increases linearly with anaerobic phosphorus release, with the slope exceeding unity.

    Increased VFAs can be substituted for shorter anaerobic HRTs, and vice versa, to enhance EBPR performance.

    more » « less
  3. null (Ed.)
    Nutrient nitrogen (N) and phosphorus (P) recovery from wastewater is an important challenge for enhanced environmental sustainability. Herein we report the synthesis and properties of mesoporous MgO nanoparticles doped with copper (Cu), iron (Fe), and zinc (Zn) as an alternative low-solubility high-abundance magnesium (Mg) source for crystalline struvite precipitation from nutrient-laden wastewater. Undoped MgO was shown to have the fastest phosphate (PO 4 3− ) adsorption kinetics with a k 2 value of 0.9 g g −1 min −1 at room temperature. The corresponding rate constant decreased for Cu–MgO (0.175 g g −1 min −1 ), Zn–MgO (0.145 g g −1 min −1 ), and Fe–MgO (0.02 g g −1 min −1 ). Undoped MgO resulted in the highest PO 4 3− removal at 94%, while Cu–MgO, Fe–MgO, and Zn–MgO resulted in 90%, 66% and 66%, respectively, under equivalent reaction conditions. All dopants resulted in the production of struvite as the main product with the incorporation of the transition metals into the struvite crystal lattice. X-ray absorption spectroscopy (XAS) showed that the majority of the Cu, Fe, and Zn were primarily in the +2, +3, and +2 oxidation states, respectively. XAS also showed that the Cu atoms exist in elongated octahedral coordination, while Fe was shown to be in octahedral coordination. Zn was shown to be in a complex disordered environment with octahedral sites coexisting with the majority of the tetrahedral sites. Finally, X-ray photoelectron spectroscopy data suggest a two-fold struvite surface enrichment with dopant metals, with Cu exhibiting an interesting new local binding structure. The dopant concentrations utilized were consistent with those found in natural Mg minerals, suggesting that (a) utilizing natural mineral periclase as the Mg source for struvite production can result in struvite formation, albeit at the expense of the reaction kinetics and overall yields, while also (b) supplying essential micronutrients, such as Zn and Cu, necessary for balanced nutrient uptake. 
    more » « less
  4. Abstract Practitioner points

    Combined (CSO) and sanitary sewer overflows (SSOs) pose both environmental and public health risks as untreated water is discharged into lakes and rivers during high‐intensity rain events.

    Current stand‐alone approaches for managing or treating CSOs focus on particulate BOD/COD and solids removal, and do not typically address soluble BOD or emerging contaminants in stormwater and wastewater (including pathogens).

    New wet weather policies and regulations encourage more holistic approaches by wastewater utilities, and future approaches should include a zero‐overflow goal for all CSOs and SSOs.

    To help achieve zero overflows, the concept of the “peaker facility” is proposed.

    Chemical oxidation may be an applicable component of peaker facilities for its short detention time and ability to remove, oxidize, or inactive water impairment‐causing contaminants.

    more » « less
  5. Abstract Practitioner Points

    PPCP removal positively correlated with solids retention time and varied by treatment facility and compound.

    Upgrade of WWTFs for biological nitrogen removal may also increase PPCP removal.

    Surface water fluoxetine concentrations may present an ecological risk to the Great Bay Estuary.

    more » « less