Stillage Solids Concentration via Cationic Polymer Flocculation
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Solution Overview
Problem
The corn ethanol process requires significant energy for mechanical and thermal methods to concentrate and separate stillage solids, necessitating a more energy-efficient method for solid concentration and separation.
Innovation Solution
The use of polymeric treatment agents, such as cationic polymers, coagulants, and flocculants, is introduced to concentrate stillage solids in the corn ethanol process, allowing for chemical addition to facilitate solid separation through various methods like centrifugation and filtration, reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical and thermal methods are used to concentrate and separate stillage solids, then separation effectiveness is improved, but energy consumption increases
Solution Approach 1:
A cationic polymer flocculant is introduced as an intermediary substance to facilitate the aggregation of stillage solids. The polymer mediates between the solid particles and the separation process, enabling effective separation through centrifugation or settling with reduced energy input compared to direct mechanical/thermal methods
Solution Approach 2:
The invention changes the chemical parameters of the stillage stream by adding cationic polymer flocculants, which alter the physical-chemical properties of the mixture. This enables solids to aggregate and separate more efficiently under lower energy conditions than traditional mechanical or thermal separation methods
2Use of energy by moving object
If polymeric treatment agents are added to concentrate stillage solids, then energy consumption is reduced, but process complexity increases
Solution Approach 1:
The invention replaces energy-intensive mechanical and thermal separation systems with a chemical treatment approach using cationic polymer flocculants. This substitution reduces reliance on complex mechanical separation equipment and high-energy thermal processes, simplifying the overall system while maintaining separation effectiveness
3Reliability
If conventional mechanical separation is used for stillage solids, then separation capability is maintained, but operational cost increases
Solution Approach 1:
The cationic polymer acts as a chemical intermediary that reduces the operational cost of separation by enabling solids to aggregate and separate under lower energy conditions, replacing expensive mechanical and thermal separation operations
Solution Approach 2:
By changing the chemical composition of the stillage stream through polymer addition, the process achieves effective separation at lower energy input levels, reducing operational costs while maintaining separation capability
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 method effectively concentrates stillage solids with reduced energy usage, enabling the production of commercially valuable products and improving the efficiency of the corn ethanol process.
Implementation Method 1
adding to the process stream mixture an effective amount of a solids concentration aid wherein the solids concentration aid is a polymeric treatment
Implementation Method 2
The solids concentration aid may be selected from the group consisting of a) a cationic polymer coagulant or flocculant
Data Source
AI summary
Stillage solids concentration methods are disclosed wherein a solids concentration aid is added to a process stream mixture in a corn to ethanol process. The solids concentration aid may comprise a cationic polymer coagulant or flocculant or both, a starch based coagulant or flocculant or a biologically derived (i.e., plant or animal origin) coagulant or flocculant. Acrylamide/quaternary ammonium copolymers and homopolymeric polydiallyldimethyl ammonium chloride polymers are noteworthy examples of suitable solids concentration aids.