Sewage Treatment Flocculation and Anaerobic-Aerobic COD Reduction
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Solution Overview
Problem
Existing wastewater treatment methods for synthetic rubber production struggle to effectively reduce COD concentration below 60 mg/L, failing to meet increasingly strict discharge standards due to the presence of solid impurities and complex treatment requirements.
Innovation Solution
A sewage treatment method involving a series of steps including flocculation, organic decomposition, and adsorption filtration, utilizing composite aluminum salts, polyacrylic agents, and anaerobic/aerobic microorganisms to transform non-degradable organics into biodegradable forms, followed by filtration to achieve discharge standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional wastewater treatment methods are used, then the treatment process can be simplified, but COD concentration cannot be reduced below 60 mg/L to meet discharge standards
Solution Approach 1:
The treatment process is divided into multiple specialized tanks: flocculation scum treatment tank, first organics decomposition tank (anaerobic), second organics decomposition tank (aerobic), and adsorption filtration tank. Each tank performs a specific function in sequence, transforming complex treatment into manageable segments that collectively achieve COD < 60 mg/L
Solution Approach 2:
The system changes operational parameters between tanks: anaerobic conditions (no oxygen) in the first decomposition tank transform non-degradable organics into biodegradable forms, then aerobic conditions (with oxygen) in the second tank further decompose organics. This parameter change enables progressive COD reduction to meet discharge standards
2Manufacturing precision
If non-degradable organics are present in wastewater, then the wastewater can be treated with simpler methods, but discharge standards cannot be met due to high COD concentration
Solution Approach 1:
The system changes the chemical parameter of organics by creating anaerobic conditions in the first decomposition tank, which transforms non-degradable ring molecular organics into easily biodegradable chain molecular organics. This parameter change makes the wastewater treatable and enables discharge standard compliance
Solution Approach 2:
Anaerobic microorganisms act as intermediaries that catalyze the transformation of non-degradable organics into biodegradable forms. These microorganisms mediate the chemical transformation, making the complex organic compounds amenable to further treatment and eventual discharge compliance
3Manufacturing precision
If multiple treatment steps are implemented to reduce COD below 60 mg/L, then discharge standards are met, but treatment time and system complexity increase
Solution Approach 1:
The treatment process is segmented into parallel functional units (anaerobic decomposition, aerobic decomposition, adsorption filtration) that operate in sequence but are independently optimized. This segmentation allows each stage to work efficiently on specific contaminants, reducing overall treatment time while achieving COD < 60 mg/L
Solution Approach 2:
The system maintains continuous operation across all tanks with constant water flow and continuous aeration in the aerobic tank. This continuity eliminates idle time between treatment stages and ensures uninterrupted COD reduction, meeting discharge standards efficiently
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 method significantly reduces COD and BOD by transforming non-degradable organics into biodegradable forms and removing pollutants as sludge, ensuring wastewater meets discharge standards.
Implementation Method 1
injecting an appropriate amount of composite aluminum salts and polyacrylic agents into the flocculation scum treatment tank through a metering pump to perform coagulation assistance and flocculation enhancement treatment
Implementation Method 2
injecting an appropriate amount of composite aluminum salts and polyacrylic agents into the flocculation scum treatment tank through a metering pump to perform coagulation assistance and flocculation enhancement treatment
Implementation Method 3
aerobic bacteria in activated sludge in the wastewater rapidly propagate after obtaining a large amount of oxygen and consume a large amount of the organics in the water
Implementation Method 4
under the action of anaerobic microorganisms on the surface of the filler, a portion of non-degradable ring molecular organics is transformed into easily biodegradable chain molecular organics
Implementation Method 5
under the action of anaerobic microorganisms on the surface of the filler, a portion of non-degradable ring molecular organics is transformed into easily biodegradable chain molecular organics
Implementation Method 6
aerobic bacteria in activated sludge in the wastewater rapidly propagate after obtaining a large amount of oxygen and consume a large amount of the organics in the water
Implementation Method 7
a filter material composition of the adsorption filtration tank is a filter material that can adopt a combination of activated anthracite and quartz sand, biochar and quartz sand
Data Source
AI summary
The present invention relates to the technical field of wastewater treatment, and specifically, to a wastewater treatment device and method, comprising the following steps: step 1: injecting wastewater into a flocculation scum treatment tank through a wastewater inlet; step 2: injecting an appropriate amount of composite aluminum salts and polyacrylic agents into the flocculation scum treatment tank through a metering pump to perform coagulation assistance and flocculation enhancement treatment; and starting an air pump to inject air into the flocculation scum treatment tank through an aeration pipe, forming tiny bubbles, whereby due to the flocculation effect of the flocculant, originally fine matters in the wastewater agglomerate into larger particles, forming suspended matters, and these suspended particles adhere on the bubbles and rise up to the water surface for the convenience of being processed by a foam pushing plate.