If moist food scraps are placed in a container and left to sit for a week or two, the end product is likely to be a smelly \" slop \" that attracts flies. Given the proper conditions, these same food scraps can be composted to produce a material that looks and smells like rich soil and can be used to enhance soil texture and productivity. So, what are these conditions that promote composting? The physical and chemical conditions that should be maintained in a compost heap seem logical if you think about what compost really is — a big pile of food for billions of minute organisms. These microorganisms have certain chemical requirements, primarily carbon for energy, nitrogen to build proteins, and oxygen for respiration. Interacting with these are physical requirements, such as aeration to maintain optimal oxygen levels while not depleting the moisture necessary for microbial growth. This chapter begins with an overview of the chemical, physical, and biological changes that occur during thermophilic composting, thereby providing an example of how several sciences can be integrated in the study of composting. This overview is followed by more detailed, separate sections on compost chemistry, physics, and biology. Much of the information in the chemistry and physics sections focuses on thermophilic composting. The biology section includes a discussion of the microbes that are present in all types of composting, and of the diversity of invertebrates that live in outdoor and some worm composting systems. The information presented here reflects the current body of scientific knowledge regarding composting. Much remains unknown, leaving a variety of intriguing questions for future research. Some of these questions are identified as Research Possibilities, sprinkled in italics throughout the text. We hope they will provide the inspiration for students to ask a much wider range of questions, and to design their own original research.

The Science of Composting

Evaluation of two different aeration systems for composting two-phase olive mill wastes

Composting of dewatered wastewater sludge with various ratios of pruning waste used as a bulking agent and monitored by respirometer

Performance of different systems for the composting of the source-selected organic fraction of municipal solid waste

Prediction of temperature and thermal inertia effect in the maturation stage and stockpiling of a large composting mass.

Temperature and oxygen profiles evolution in windrows were monitored in windrows located at a commercial composting plant. Controlled turning of the windrows was executed using a turning machine. Measurements were made from the onset of turning, when temperature and oxygen were uniform throughout, onward, to evaluate the development of the relevant profiles. Temperatures rose and oxygen declined soon after turning. In fresh active windrows, a temperature maxima at a depth of 50-70 cm was detected, with temperatures as high as 65°-70°. The outward layers were cooler due to the effect of the ambient air temperature. Inward cooler core region seemed to be due to limited oxygen availability and the resulted restricted metabolic activity. No temperature maxima were observed as windrows approached stability. At this stage, the temperature of the core was as high as that of mid-layers. Oxygen, assumed to be in equilibrium with the atmosphere at the instance of turning, dropped down rapidly and reached steady levels within a period of about 4 hours. Oxygen concentration was lowered with depth, demonstrating a linear gradient down to about 70 cm depth. These data iterated the notion that oxygen is an important limiting factor in windrow composting. For any given point, high temperature may be a limiting factor. However, it seems that in properly managed windrows, high temperature is not limiting overall, due to an intrinsic correction feed back mechanism. If temperature in the hottest mid-layers gets to a level where microbial activity is hampered, less oxygen is consumed as it moves toward the core. Thus, more oxygen can penetrate into the core and the overall activity is not affected. It should be stressed that oxygen and temperature are not the only factors affecting composting rates. Other factors such as moisture, nutrients, substrate and porosity do have an important role.

Factors Affecting The Rate Of Windrow Composting In Field Studies

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Rama Eilat

Author Tools

Chat about Author

Papers

Factors Affecting The Rate Of Windrow Composting In Field Studies