Increasingly stringent limits on nutrient discharges are motivating water resource recovery facilities (WRRFs) to consider the implementation of sidestream removal or technologies. To further increase biogas production and reduce landfilled waste, WRRFs with excess anaerobic digestion capacity can accept other high-strength organic waste (HSOW) streams. The goal this study was characterize evaluate life-cycle global warming potential (GWP), eutrophication potential, economic costs benefits...

Diversion of organic waste from landfills offers an opportunity to recover valuable nutrients such as nitrogen and phosphorus that are typically discarded. Although prior research has explored the potential for buildout anaerobic digestion (AD) infrastructure treat generate energy, a better understanding is needed nutrient recovery solid liquid byproducts (digestate) resulting AD these streams. We quantified system-wide mass can potentially be recovered in California by integrating current...

A growing world population with increasing levels of food consumption will lead to more dairy and swine production amount manure that requires treatment. Discharge excessive nutrients carbon in untreated animal can greenhouse gas emissions eutrophication concerns, treatment efforts be expensive for small scale farmers marginalized communities. The overall goal this study was determine the environmental economic sustainability four management scenarios Costa Rica: (1) no treatment, (2)...

Thermochemical conversion technologies are emerging as preferred resource recovery practices for managing animal manure in agricultural regions. Although the implementation of such has been previously studied, difficulties exist maintaining balance between high rate and low environmental, economic, social impacts, particularly rural regions with limited resources. We developed a data-driven framework by integrating machine learning life cycle thinking that can be used an open-source tool to...

Abstract Resource recovery can provide opportunities to mitigate the negative impacts of conventional organic waste management such as landfilling environment, economy, and society in rural agricultural regions. However, region-specific assessment be challenging due lack data, limited economic resources, inadequate policy support meet community needs. Therefore, we developed a framework utilizing open-source data methods informed by engagement assist stakeholders regions considering...

An in-line PVC chlorinator can be an appropriate water disinfection technology to inactivate pathogens and improve quality in community-managed supply systems. Free chlorine residual was measured at five locations after the insertion of one tablet into and, a second experiment, three tablets. The Ct (concentration × time) method for used compare free with required recommended percentage common found gravity-flow systems developing world. two operating conditions, each contact time 56.6...

Nutrients (nitrogen and phosphorus) can be removed or recovered from wastewater at different points in the collection treatment process, for example, individual buildings households, conveyance (sewer) system, centralized plant. Multiple technologies are available nutrient removal recovery any of these application, but appropriateness a candidate technology depends on scale application; that is appropriate removal/recovery large plant may not an household. Hence, need exists tool enables...

Engineered struvite precipitation (ESP) is now a common procedure to recover phosphorus and nitrogen from waste streams such as wastewater-treatment-plant sidestreams, urine, landfill leachate, agricultural waste. Depending on the stream, liquid effluent ESP likely still contain either or phosphorus. In case of recycled back head plant contains high concentrations nitrogen, which can cause instability in mainstream treatment processes additional energy chemical costs. Therefore, need exists...

Abstract Improving the Global Competency of Graduate Engineers Through Peace Corps Partnership and Long­Term International Service As society addresses major challenges associated with food, water, energy climate change there is an increasing need for engineers that are interdisciplinary globally competent. competency "the ability to understand work effectively other co­workers who raised, educated, living in countries than their own solve define problems differently oneself" (Downey et al.,...

Rapidly urbanizing coastal communities are prone to overpopulation and unrestrained growth that result in pathogen nutrient emissions, which impair beach water quality jeopardize human environmental health. Decision makers face complex, context-dependent choices when selecting sanitation technologies with varying abilities remove pathogens nutrients. The goal of this study was identify context-appropriate solutions manage nutrients ensure safe swimming conditions an town relies on tourism....

Increased organic waste generation in the residential, industrial, and agricultural sectors results massive amounts of that are landfilled incinerated, thereby contributing to environmental pollution. Opportunities exist recover valuable resources from potentially leverage economic benefits. One common strategy for managing is anaerobic digestion (AD). The liquid effluent AD, called digestate, a concentrated source phosphorus nitrogen. These nutrients can be recovered via struvite...

Eight effective bacterial strains were isolated from cyanide-contaminated soil, which, two (S11 and S13) tested to determine their minimum inhibitory concentration using potassium cyanide (KCN) tetracyano nickelate (K2Ni(CN) 4). The isolates for KCN biodegradation potential (by measuring ammonia production) at neutral alkaline pHs (7.0 9.0). Furthermore, the effect of initial on was evaluated optimal pH nitrogen free M9 medium, supplemented with as source. results showed that both tolerated...

Abstract Title: Life cycle thinking and engineering in developing communities: Addressing international sustainability challenges the classroom Integrating issues into curriculum can be used to expose undergraduates complex global related food-water-energy nexus. This paper explores integration of communities life for civil, mechanical, mechatronic students (n=79) at a Hispanic-Serving Institution (HSI) through semester-long group project. assessment (LCA) cost analysis (LCCA) were analyze...

Centralized wastewater treatment plants remove nutrients prior to discharge. Recently, technologies have become available manage at different scales (individual buildings, neighborhoods/communities, or large centralized plants). Nutrient-recovery applied upstream of the plant may affect both flow rates and nutrient fluxes reaching plant. This study evaluates how introduction such affects efficiency economics management across a sewershed. Employing from that receives highly loaded municipal...

Aerobic digestion of waste activated sludge is a common practice at water reclamation facilities. Dewatering digester effluent produces liquid stream, commonly referred to as sidestream, that rich in nitrogen and phosphorus. Removal from the sidestream improves mainstream treatment, but usually requires input energy and/or chemicals. The purpose this study was evaluate microbial fuel cell (MFC) candidate technology remove aerobic while simultaneously producing electricity, without requiring...

A number of existing and emerging technologies can recover nitrogen from urine. preliminary step in many recovery processes is hydrolyzing urea to ammonium, a biologically-mediated process that take days weeks without intervention. The ability achieve hydrolysis quickly reliably would increase the feasibility decentralized recovery, especially where space treatment time are constrained. goal this research was determine whether could be accelerated by providing an inoculum containing...

Abstract Exploring the Expanding Impact of a Sustainable Development Engineering Course Through Critical Evolutionary Review A course (cross listed in College PublicHealth as Water Pollution and Treatment) has evolved over seven years at this university toincorporate interdisciplinary groups graduate students to engage critical thinking andproblem solving. The objectives are 1) apply engineering fundamentals andappropriate technology design, construction, operation, maintenance...