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United States Department of Agriculture (USDA) 2021

UPGRADING WASTEWATER FOR IRRIGATION USE : A SUSTAINABLE APPROACH TO REMOVING MULTIPLE ORGANICS OF EMERGING CONCERN

Wastewater Irrigation Organics

United States Department of Agriculture (USDA) National Institute of Food and Agriculture

Titre : UPGRADING WASTEWATER FOR IRRIGATION USE : A SUSTAINABLE APPROACH TO REMOVING MULTIPLE ORGANICS OF EMERGING CONCERN

Identification : 1027158

Pays : Etats Unis

Durée : START : 01 AUG 2021 TERM : 31 JUL 2023

Résumé
Over the next 10 years, water shortages are anticipated in 40 of the 50 US states (USDA, 2020). Drought, climate change, and competition for use of high-quality water supplies are reducing the availability of irrigation water, especially in arid and semi-arid regions. Water reuse is becoming an increasingly important alternative to use of limited water supplies, boosting water security, sustainability and resilience. One of the challenges associated with re-use of municipal wastewater, however, is that existing wastewater treatment plants are unable to remove many organic contaminants of emerging concern (CEC), including perfluorinated compounds (PFAS) and pharmaceutical and personal care products (PPCP).The goal of this project is to provide a low-cost, sustainable method to remove organic contaminants of emerging concern from treated wastewater, to facilitate its use for irrigation, by using waste materials as adsorbents. Although adsorbents can cost-effectively remove organics, a single adsorbent is not effective for concurrently removing the various types of CECs that exist in treated wastewater. This work proposes a novel approach to remove multiple CECs simultaneously : development of MultiSorb, a mixture of multiple sorbents made from different waste materials (rice husk and sewage sludge) with different physical/chemical pre-treatments, tailored to remove various compounds.We anticipate that the costs of MultiSorb will be 5-16% that of commercial activated carbon. While commercial activated carbon uses the non-renewable resource coal, waste-made adsorbents will come from a renewable resource. Beneficial reuse of waste byproducts will also reduce the need for landfill space.

Objectifs
The overall goal of the proposed project is to support an aim of the Agriculture Systems and Technology program - to increase the sustainability of agricultural/food production systems - by facilitating the use of treated wastewater for irrigation. By using waste materials as adsorbents, the project will provide a low-cost, sustainable method of removing recalcitrant organics from treated wastewater. Specific objectives are:Prepare/characterize adsorbents from rice husk and sewage sludge, using varied pre-treatments.Develop and test PreSorb for removing natural organic matter, using batch tests.Develop and test MultiSorb for removing perfluorinated compounds (PFAS) and pharmaceutical and personal care products (PPCPs), using batch tests.Evaluate PreSorb and MultiSorb using column tests, which better simulate actual water treatment systems.Compare costs for wastewater treatment using PreSorb/MultiSorb with commercial activated carbon.

Financement total : $220,287

Performing Institution : UNIVERSITY OF TEXAS AT ARLINGTON
Investigator : Sattler, M. 

Présentation : USDA (NIFA)

Page publiée le 24 novembre 2021