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Effects Of Soil Amendments On Water Quality And Hydrologic Properties In Low Impact Development Systems, Lily Wetterlin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Low impact development (LID) systems are practices that use natural elements, such as soils and vegetation, to absorb and filter stormwater to protect water quality and aquatic habitats. Many LID designs use native soils; however, urban soils typically have a limited potential for infiltrating and treating stormwater. Incorporation of soil amendments, such as compost and biochar, into LID soils can improve the physical properties of soil. However, soil amendments may increase or decrease pollutants in the water leaving the site. A comparison of the effects of different types and application rates of amendments on water quality is necessary to determine …

Anaerobic Digestion At Western Washington University, Sienna Taylor

WWU Honors College Senior Projects

Anaerobic digestion (AD) is the process by which organic matter (such as food waste, manure, paper products, etc.) are broken down by bacteria in a contained system lacking oxygen. The decomposition in this environment produces the byproducts of digestate, which can be used as a liquid fertilizer, and biogas, which can be used in place of natural gas. The goal of anaerobic digestion at Western Washington University is to create a closed-loop waste system to process the pre-consumer and post-consumer organic food waste from the dining halls and use the resulting byproducts. This paper provides recommendations for anaerobic digestion at …

Food Waste Storage Gaseous Emissions Detection And Quantification Using Infrared Spectroscopy, Ryley A. Burton-Tauzer

Cal Poly Humboldt theses and projects

A growing interest in sustainable waste management and the implementation of new policies have prompted a shift towards alternative resource recovery methods for organic waste, including food waste. To effectively assess alternative food waste treatment scenarios, it is important to evaluate the life cycle impacts associated with each scenario. The storage phase of food waste, encompassing its accumulation in kitchens, and storage in bins for collection and transportation, has been overlooked as a source of greenhouse gases in previous studies. This investigation aimed to identify the greenhouse gases emitted during the initial five-day period of low-oxygen storage. An open dynamic …

Exploring Soil-Tree Interactions After Applying Organic Matter Amendments To Peach Orchards In The Subtropical Climate Of The Southeastern United States, Brian Lawrence

All Dissertations

Soil disturbance from the cultivation and intensive management of orchards in hot and humid subtropical climates can reduce soil organic matter (OM). This research explored how the addition of OM amendments impact soil and tree parameters in two field studies and how proximity to OM may elicit unique genomic response of peach roots in a split-root pot study. The first field study applied two rates of compost (1x and 2x) and subsequently reduced fertilizer applications annually to a virgin and replant orchard location. While both compost rates successfully replaced fertilizers, only the 2x rate in the replant location increased soil …

Soil Mesofauna And Microbial Community Response To Mixed Biochar And Compost Application In A Skagit Silt Loam, Jameson Goff

WWU Graduate School Collection

I sampled Skagit silt loam soils from a field trial at the WSU NWREC where biochar and compost were added to potato crops in late spring pre-planting. Soil mesofauna were sampled at mid and late-summer, while soil microbes were sampled at late summer exclusively. Soil treatments included mixed biochar and compost, compost-only, and an unamended control. Mesofauna were extracted with Berlese funnels and sorted to functional groups. F:B ratios and total microbial C were determined using microbiometer test kits. To test whether biochar and compost induced changes to soil mesofauna communities, I used permutational ANOVA. Differences in F:B ratios and …

Enhancing The Fertilizer Value Of Cattle Manure Using Organic Resources For Soil Fertility Improvement: A Review, Benedicta E. Ayamba, Robert C. Abaidoo, Andrews Opoku, Nana Ewusi-Mensah

Journal of Bioresource Management

The poor quality of cow dung in Ghana resulting from the opportunistic feeding mode of cattle impedes its adoption due to high quantities needed for application. This calls for nutrient optimization of cattle manure with inexpensive locally available sources of organic inputs that could enhance its quality. Though large volumes of crop residues and other agro-wastes are produced on-farm, they are underutilized and mostly a nuisance. Major food crops take approximately, 44 %, 42 % and 56 % of the total nitrogen (N), phosphorus (P) and potassium (K), respectively and are found in crop residues. There is therefore the need …

Composting Processes For Food Processing Wastes: A Review, Yung-Tse Hung, Kevin P. Holloman, Howard Paul, Christopher Huhnke

Civil and Environmental Engineering Faculty Publications

Composting of food processing waste was analyzed as a biological process and an engineered system. The goal is to establish fundamental principles and design criteria that would aid its adoption as waste management practice. Characteristics of the inflow, reactor, and outflow were evaluated. Success of the bioreactor was found to be largely dependent on microbial community structure, physical properties of biodegradable waste (BW), aeration, heat transfer, and time required for maturation. Static piles were the primary focus of this article for cost and energy efficiency.

Effects Of Compost On Soil Health And Greenhouse Gas Emissions: A Case Study In A Mediterranean Vineyard, Tsz Fai Wong

Master's Theses

Compost is commonly used as an organic amendment in cropping systems such as vineyards, and has been shown to be beneficial to carbon (C) sequestration and soil health. As perennial crops, grapevines have a larger potential for C sequestration than most crops. Yet, there is a lack of understanding regarding the relationship between compost application rate, the magnitude of C sequestration, and its environmental tradeoff in the form of greenhouse gas (GHG) emissions. In the study, we investigated the effects of compost application rate on soil C sequestration, GHG emissions, crop growth, and overall soil health after two annual compost …

Compost And Biochar To Promote Soil Biological Activities Under Sweet Potatoes Cultivation In A Subtropical Semiarid Region, Josabeth Navarro, Jahdiel Salazar, James Jihoon Kang, Jason Parsons, Chu-Lin Cheng, Alexandria Castillo, Engil Isadora Pujol Pereira

School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

South Texas is located in a subtropical semiarid climate, and due to high temperature and irregular precipitation, farmers opt to leave their fields fallow during the summer months jeopardizing overall soil health. We evaluated whether sweet potato (Ipomoea batatas) cultivation coupled with drip irrigation could restore soil biological activities compared with bare fallow. Additionally, because sweet potatoes have high demand of soil nutrients, especially potassium (K), we evaluated the nutrient supply of locally sourced soil amendments. Sweet potato was cultivated during summer 2018 in McAllen, Texas, under control (no fertilizer), NPK (synthetic fertilizer), RC (yard-waste compost), and AC (compost produced …

Techno-Economic Optimization Of Food Waste Diversion To Treatment Facilities To Determine Cost Effectiveness Of Policy Incentives, Kanwal Shahid

Theses

New York state recently passed a food waste (FW) disposal ban, which will prohibit land-filling of FW produced by commercial entities generating more than 2 tons/week by the year 2022. This will redirect 370,000 tons/year of FW from landfills. In this work, we investigate three questions about the landfill ban: 1) How can this waste be diverted to treatment facilities at lowest system cost? 2) To what degree can an expanded anaerobic digestion portfolio help with the state’s Renewable Portfolio Standards? 3) What policies can help with the transition of waste-to-energy technologies? We develop a mixed-integer linear programming model that …

Assessment Of Dehydration As A Commercial-Scale Food Waste Valorization Strategy, Jon T. Schroeder, Ava L. Labuzetta, Thomas A. Trabold

Articles

Using a commercially available dehydration unit, this study aimed to valorize various food waste streams from different sources in the Rochester, New York area. Dehydration of the food waste collected for the study helped reduce the weight of the feedstock by 70–90%, as the incoming waste streams were relatively wet. The output was materially characterized against end uses such as cattle feed, fish feed, and compost. The results demonstrated that, other than fertilizer, the remaining five end uses (compost, fish feed, cattle feed, pyrolysis, and pelletized fuel) were potentially compatible with varying waste feedstocks based on the parameters analyzed. Fish …

Yields Of Relay Cropped Greens Grown In Green Roof Production Systems, Leigh Whittinghill, Pradip Poudel

Urban Food Systems Symposium

As interest in urban food production increases, urban farmers are looking for solutions to the challenge of space availability. One solution is to move production to building rooftops, a space that is often underutilized. The use of green roof technology is one method of achieving food production on rooftops; however, there are some additional challenges associated with this practice as a result of the fast-draining, low-nutrient media used. This is particularly challenging for vegetable crops, which typically require more nutrients than the ornamental plants traditionally grown in green roof media. Some rooftop farmers are adding additional organic matter in the …

Evaluating Effects Of Southern Yellow Pine Biochar And Wood Vinegar On Poultry Litter, Maryam Mohammadi-Aragh

Theses and Dissertations

The objectives of this study were to investigate nutrient retention, intI1 prevalence, and compost maturity rates for poultry litter co-composted with 5, 10, and 20% southern yellow pine biochar and with or without 2% wood vinegar (WV). Samples were collected at 0, 57, and 112 days to measure nitrogen, phosphorus, and potassium (N, P, K) concentrations, microbial counts, pH, moisture content, carbon to nitrogen (C:N) ratio, and intI1 abundance. Composts were aerated once a week and the temperature was also recorded once a week. There was sufficient rainfall so no additional water was added. The results showed that N and …

Influence Of Soil Water Content And Soil Amendments On Trace Metal Release And Seedling Growth In Serpentine Soil, Viraj Gunarathne, Nishanta Rajakaruna, Udaya Gunarathne, Jayanta Kumar Biswas, Zach A. Raposo, Meththika Vithanage

Biological Sciences

This study was conducted to evaluate the synergistic effects of organic amendments and soil water status on trace metal release from serpentine soil.

Interactions Between Biochar And Compost In Organic Winter Wheat Production And Soil Quality Under Dryland Conditions, Phearen Kit Miller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Organic wheat grown under dryland conditions encounters challenges such as limited nutrients and water. Maintaining organic wheat production requires solutions to these problems in order to retain economic sustainability for the farmers.

Research on biochar and compost have been conducted globally. Despite well known benefits of compost on soil and crop production, few organic farmers apply compost to their fields. Research on biochar is still new. Biochar is charcoal created from pyrolyzing agricultural material under conditions of low oxygen and high heat. Many studies claim that biochar is a valuable soil amendment for improving organic production and reducing environmental pollution …

Biochar For Remediating Contaminated Soils: Outdoor Experiments In Wales, Uk, Alayne Street-Perrott, Siôn Brackenbury, Iain Robertson, Aoife Ryan, Robert Davison, Heather De-Quincey

Biochar: Production, Characterization and Applications

Most soil-related applications of biochar have involved agriculture or horticulture. Our current research focusses on remediation of contaminated soils using biochar or biochar compost. We will present the results of outdoor pot and plot trials on three contrasting site types: 1) colliery waste; 2) cleared invasive rhododendron; and 3) metal-mine tailings. All experiments utilized sustainable, lignocellulosic biochar (EarthChar®; UK Biochar Quality Mandate: High Grade), produced using a modified BigChar-1000 fast-pyrolysis/gasification unit equipped with a thermal oxidiser.

Please click on the file below for full content of the abstract.

Design Of A Sustainable Toilet, Meghan Pranger, Tommy Lauderdale, Joseph Benyon, Kyle Moore

Mechanical Engineering

No abstract provided.