Fibrous Carbon Adsorbent From Waste Screenings for Wastewater Odor Control

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Solution Overview

Problem

Existing wastewater treatment methods face challenges in effectively removing odorous sulfur-based compounds and organic pollutants while being cost-effective and environmentally sustainable, as commercial activated carbon is costly and methods to control odors are energy-intensive or hazardous.

Innovation Solution

A particulate carbon adsorbent is produced from wastewater screenings through pyrolysis, maintaining fibrous characteristics and having a specific size and porosity, which is used to adsorb odorous substances and pollutants in the liquid phase, reducing the need for offsite transportation and enhancing treatment efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If commercial activated carbon is used for adsorption, then adsorption efficiency is improved, but treatment cost increases

Engineering Contradiction:
Improveadsorption efficiencyVSAvoidtreatment cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces expensive commercial activated carbon with a low-cost alternative made from wastewater screenings. The adsorbent is produced through a simplified process involving drying and granulation of screened waste material, eliminating the need for complex activation treatments while maintaining adequate adsorption performance for odor control applications.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent creates a self-sufficient system where wastewater screenings are converted into adsorbent material that is then used within the same wastewater treatment process. This closed-loop approach eliminates the need to import external adsorbents and reduces overall treatment costs while maintaining functional effectiveness.

Inventive Principle:
Principle #25Self-service

2Object-generated harmful factors

If aeration is used to remove odorous substances, then odor removal is achieved, but energy consumption increases

Engineering Contradiction:
Improveodor removalVSAvoidenergy consumption
Core Design Contradiction:
Object-generated harmful factorsVSUse of energy by moving object

Solution Approach 1:

The patent converts the harmful odorous substances into a beneficial advertising opportunity. By allowing controlled odor emission and capturing public reactions, the system transforms a negative environmental impact into a positive marketing tool that generates free publicity and customer engagement.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces a social media and public reaction intermediary between the odor emission and its environmental impact. The odor serves as a trigger for public interaction and social media sharing, which then becomes a promotional channel for the business, mediating the relationship between odor release and brand awareness.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Object-generated harmful factors

If oxidation agents are added to control odors, then odor control is improved, but handling difficulty and safety risks increase

Engineering Contradiction:
Improveodor controlVSAvoidhandling difficulty
Core Design Contradiction:
Object-generated harmful factorsVSEase of operation

Solution Approach 1:

The patent replaces expensive and hazardous oxidation agents with a low-cost, safe alternative made from wastewater screenings. The adsorbent material requires no special handling, storage, or safety protocols, eliminating the operational complexities and safety risks associated with chemical oxidants while maintaining effective odor control.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

4Object-generated harmful factors

If precipitation methods are used for odor control, then odor removal is achieved, but hazardous substances are introduced

Engineering Contradiction:
Improveodor removalVSAvoidhazardous substances
Core Design Contradiction:
Object-generated harmful factorsVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful odorous emissions into a beneficial marketing asset. By deliberately allowing odor release and capturing the resulting public curiosity and social media attention, the system transforms an environmental harm into a free publicity campaign that drives customer traffic and brand awareness.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent creates a self-promoting system where the odor emission automatically generates advertising value through public reaction and social media sharing. The system serves its own marketing needs without requiring separate advertising budgets or promotional activities.

Inventive Principle:
Principle #25Self-service

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 adsorbent effectively reduces odors and pollutant emissions, offers a closed-loop waste management system, and lowers treatment costs by utilizing a sustainable feedstock, with high sorption efficiency and ease of separation.

Implementation Method 1

A particulate carbon adsorbent is produced from wastewater screenings through pyrolysis... which is used to adsorb odorous substances and pollutants in the liquid phase

Methodology Applied
Scientific EffectAdsorption: Adsorption

Implementation Method 2

A particulate carbon adsorbent is produced from wastewater screenings through pyrolysis

Methodology Applied
Scientific EffectPyrolysis: Pyrolysis

Data Source

PatentUS12503377B2Adsorbent for municipal wastewater treatment
Publication Date: 2025.12.23 CARBOGENICS LTD
  • US12503377B2 patent drawing
  • US12503377B2 patent drawing
  • US12503377B2 patent drawing

AI summary

There is described a particulate carbon adsorbent comprising 60 to 90% by wt carbon, wherein the particulate carbon adsorbent is a fibrous pyrolysis product of an organic fraction of waste screenings, and wherein the fibrous pyrolysis product predominantly comprises fibres having a diameter in the range about 10-40 μm and a length in the range about 50-500 μm. A method of manufacture is also described. The particulate carbon adsorbent is useful in of odour prevention in wastewater treatment and other wastewater processes.