Condensate Oxidation for Odor Control in Rendering Vapor Streams
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Solution Overview
Problem
Rendering and pet food manufacturing facilities face odor issues due to condensate streams containing odorous compounds like hydrogen sulfide and VOCs, which are not effectively treated before discharge, leading to environmental nuisances.
Innovation Solution
Condensing vapor streams to produce liquid condensate streams and then oxidizing them using oxidizers like hydrogen peroxide, with optional catalysts and chelating agents to enhance odor reduction, before discharge or treatment in wastewater systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If condensate streams are mixed with other waste streams and processed in wastewater pretreatment or biological treatment systems, then the volume of odor-causing compounds is reduced through dilution, but the odor-causing compounds are liberated through reduced solubility driven by changes in pH, temperature, mechanical aeration, causing odor problems in the surrounding atmosphere
Solution Approach 1:
The patent applies preliminary action by oxidizing the condensate stream before it is mixed with other waste streams or discharged. This pre-treatment prevents the subsequent liberation of odor-causing compounds that would occur during normal wastewater processing. The oxidation step converts odorous compounds into non-odorous oxidation products beforehand, eliminating the odor problem that would otherwise arise during pH changes, heating, or aeration in downstream processes.
2Device complexity
If condensed vapor streams are discharged directly without treatment, then the complexity of the treatment system is minimized, but odor-causing compounds cause environmental nuisances
Solution Approach 1:
The patent employs strong oxidants such as hydrogen peroxide, ozone, or permanganate to rapidly oxidize odor-causing compounds in the condensate stream. This accelerated oxidation method effectively eliminates odors without requiring complex multi-stage treatment systems. The strong oxidants directly convert odorous organic compounds into non-odorous oxidation products, providing a simple yet effective solution that balances treatment efficacy with system simplicity.
3Object-generated harmful factors
If oxidizers are added to condensate streams to oxidize odor-causing compounds, then the odor-causing compounds are effectively removed, but additional chemical treatment steps and oxidizer consumption are required
Solution Approach 1:
The patent applies self-service by utilizing the existing condensate stream characteristics to facilitate oxidation. The condensate stream itself, with its specific pH, temperature, and composition, serves as the medium for the oxidation reaction. In some embodiments, the condensate stream may even contain substances that enhance oxidation or the oxidizer may be generated in-situ from process byproducts. This reduces the need for additional complex treatment infrastructure while maintaining effective odor control.
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
Significantly reduces odor-causing compounds, minimizing odor treatment costs and environmental impact by effectively oxidizing odorous components in condensate streams before they cause nuisance.
Implementation Method 1
These vapor streams are condensed along with at least some of the odorous compounds to generate a liquid stream
Implementation Method 2
adding an oxidizer to the condensate stream. As a result of adding an oxidizer, the odor-causing compounds are oxidized, thereby reducing the odor of the condensate stream
Implementation Method 3
with optional catalysts and chelating agents to enhance odor reduction
Data Source
AI summary
The invention relates to methods and apparatuses for treating a condensate stream from a condenser that contains odorous compounds, such as various condensate streams produced in a rendering process. In one embodiment, the condensate stream is treated by adding an oxidizer to the liquid condensate stream to oxidize odor-causing compounds in the stream prior to being treated in a waste water pre-treatment system. In this manner, the odor resulting from these compounds can be reduced or eliminated.