Fermentation Reactor with Distributed Substrate Feeding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dry fermentation processes face challenges in achieving uniform degradation of high dry matter content substrates due to uncontrolled concentration gradients and mixing effects, leading to inefficient microbial degradation and process instability in plug flow reactors.
Innovation Solution
The implementation of multiple substrate feed openings distributed along the reactor length, overlapping or tangent to adjacent stirring devices, allows for balanced substrate distribution and reduced local organic space load, minimizing concentration gradients and enhancing process stability through controlled dosing and agitator operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If substrate is introduced at a single feed opening in conventional plug flow reactors, then the reactor structure is simple, but uncontrolled concentration gradients form leading to inefficient microbial degradation
Solution Approach 1:
The reactor is divided into multiple feed zones along its length, with separate feed openings positioned at different locations. This segmentation allows substrate to be introduced at multiple points simultaneously, creating controlled concentration gradients that improve microbial degradation efficiency while maintaining manageable system complexity through modular feed opening placement
Solution Approach 2:
Different regions of the reactor are equipped with feed openings at specific locations to create locally optimized substrate distribution. The feed openings are positioned to address specific local conditions in each reactor zone, ensuring uniform substrate concentration profiles throughout the reactor length and maximizing organic conversion rates in each segment
2Reliability
If multiple feed openings are implemented to improve substrate distribution, then organic conversion rates increase, but the device complexity increases
Solution Approach 1:
The feed system is segmented into multiple discrete feed openings distributed along the reactor length, each capable of independent operation. This segmentation enables balanced substrate distribution across different reactor zones, improving process stability by preventing localized overloading while maintaining manageable complexity through standardized feed opening modules
Solution Approach 2:
Feed openings are positioned at multiple locations along the longitudinal dimension of the reactor, transitioning from single-point feeding to multi-point distributed feeding. This dimensional distribution of feed openings creates uniform substrate concentration profiles throughout the reactor, enhancing process stability without requiring complex control systems
3Productivity
If substrate concentration is high to improve organic load, then productivity increases, but concentration gradients become uncontrolled leading to mixing effects
Solution Approach 1:
The reactor is segmented into multiple feed zones with substrate introduced at different locations along the length. This segmentation allows high organic load to be distributed across multiple zones simultaneously, maintaining high productivity while preventing uncontrolled concentration gradients through balanced multi-point feeding that preserves plug flow characteristics
Solution Approach 2:
Each feed opening is positioned to create locally optimized substrate concentration profiles, ensuring uniform distribution throughout the reactor. By addressing specific local conditions in each zone with appropriately positioned feed openings, the system maintains high organic conversion rates while preventing harmful concentration gradients and mixing effects
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
This approach achieves higher organic conversion rates and improved process stability by ensuring uniform biological activity across the reactor, reducing foaming and environmental disturbances, and optimizing the utilization of easily degradable organic fractions.
Implementation Method 1
each of which has at least one individually contain powered stirring device for mixing the substrate
Implementation Method 2
The biochemical processes take place along the transport route through the reactor, with a corresponding progressive qualitative change in the input substrate. This essentially involves a breakdown of the organic substances. After the defined mean residence time, the end product, which has been broken down over the length of the reactor, finally leaves the reaction space.
Implementation Method 3
In the fermentation of substrate containing organic material, e.g. biowaste, residues from food production or renewable raw materials
Implementation Method 4
a fermentation device for the biological decomposition of substrate containing organic material and for obtaining the biogas produced during decomposition
Data Source
AI summary
The invention relates to a fermentation device and a method for the biological degradation of a substrate containing organic material and for the recovery of the biogas that is produced in the degradation process. The fermentation device has an elongated sealed container (1) with a feed opening (26) for the substrate and removal openings (19, 20) for the degraded products. The container is equipped with several reaction volume cells (2), each of which has at least one individually driven mixing unit (3) for mixing the fermentation product. According to the invention, the substrate is not only fed into the container (1) via the front end of the fermentation device but also at other discrete feed points (6, 7, 8, 9) in the overlap or tangential region of adjacent mixing units, distributing said substrate over the length of the container.