Rotary Compression Unit for Animal Waste Drying
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Solution Overview
Problem
Conventional methods for disposing of animal waste by-products, such as composting and anaerobic digestion, lead to water pollution and are costly and inefficient, while combustion faces challenges with high moisture content and heterogeneity, resulting in contamination and increased health risks due to nitrate and microbial contamination.
Innovation Solution
A rotary biomass dryer system processes animal waste by-products into fertilizer/soil conditioners or fuel sources like bio-oil, bio-char, and bio-coal, using a Rotary Compression Unit (RCU) that heats and dries the waste, destroying pathogens and forming a stable, transportable product with controlled release of nutrients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional composting or anaerobic digestion is used to dispose of animal waste by-products, then the waste can be processed, but water pollution increases and the process is costly and inefficient
Solution Approach 1:
The patent applies parameter changes by transforming the physical and chemical state of animal waste through controlled thermal processing. The waste undergoes heating, drying, and carbonization at specific temperature ranges to convert it from a polluting material into stable fertilizer or fuel products, fundamentally changing its properties to eliminate harmful effects while improving processing efficiency
Solution Approach 2:
The patent utilizes phase transitions in the thermal processing of animal waste. The waste material undergoes phase changes from wet organic matter to dried solid fertilizer or carbonized fuel through controlled heating and moisture removal. This phase transition approach enables efficient water separation and concentration of nutrients or energy-dense carbon products
2Use of energy by moving object
If combustion is used to dispose of animal waste, then energy can be recovered, but high moisture content and heterogeneity cause contamination and health risks
Solution Approach 1:
The patent applies preliminary action by pre-drying and pre-processing animal waste before combustion or energy recovery. The waste undergoes initial thermal treatment to remove moisture and decompose organic contaminants, preparing it for subsequent energy recovery processes. This preliminary processing eliminates harmful contaminants while preserving energy content for efficient combustion
Solution Approach 2:
The patent changes physical and chemical parameters of animal waste through controlled thermal processing. By adjusting temperature, residence time, and atmospheric conditions, the waste is transformed into stable carbonized products or pre-treated material suitable for clean combustion, eliminating contaminants while recovering energy
3Quantity of substance
If animal waste is applied directly to fields, then nutrients are replenished, but nitrate contamination causes health issues and eutrophication
Solution Approach 1:
The patent applies parameter changes by transforming animal waste through controlled thermal processing to produce stable fertilizer products. The heating and drying processes alter the chemical form of nutrients, converting them into stable, slow-release forms that remain in the fertilizer product rather than leaching into water systems, thus maintaining nutrient benefits while eliminating contamination risks
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The rotary biomass dryer system effectively reduces water pollution, provides a cost-effective and efficient method for waste disposal, and produces a stable fertilizer/soil conditioner or fuel source that is safer for environmental use, reducing health risks and improving waste management.
Implementation Method 1
a rotary compression unit (RCU)... mixing and heating the animal waste by-product in the rotary mass dryer system to separate the animal waste by-product into steam and the fertilizer/soil conditioner or fuel source material
Implementation Method 2
Steam is removed from RCU as the fertilizer/soil conditioner or fuel source material passes through the reflux condenser
Implementation Method 3
cooling the fertilizer/soil conditioner or fuel source material
Data Source
AI summary
A fertilizer/soil conditioner or a fuel source material is formed by processing animal waste by-products through the use of a rotary biomass dryer system. The animal waste by-product includes without limitation manure obtained from cattle or swine; feed lot bedding, poultry litter, a digestate of animal waste by-products obtained from an anaerobic digester, municipal waste, waste meat renderings, waste meat, or a mixture thereof. The processed material may comprise a higher amount of ash and a lower amount of volatile material than the animal waste by-product. The processed material may be stored as a powder or processed into pellets, logs, pucks, briquettes or another convenient shape form.