BDP Sewage Denitrogenation System Carbon Source Utilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sewage denitrogenation methods fail to sufficiently utilize the carbon source in water, leading to increased operational costs and inability to meet stringent discharge standards for total nitrogen, such as the upcoming 5 mg/L standard in the US.
Innovation Solution
The BDP sewage denitrogenation treatment system, which includes a water inlet zone, first and second aerodynamic zones, a circumfluent zone, a rapid sedimentation zone, and a reflux buffering zone, utilizes sludge exchange and air introduction to partially oxidize ammonia nitrogen into nitrite, reducing the need for additional carbon sources and achieving effective denitrogenation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional biological denitrogenation methods are used, then the treatment process is economically viable and produces no secondary pollution, but the carbon source in the original water cannot be sufficiently utilized and additional carbon source must be added
Solution Approach 1:
The system enables the original water's carbon source to serve itself for denitrogenation by creating an internal carbon cycle. The circumfluent zone allows organic matter to circulate and be utilized by denitrifying bacteria, eliminating the need for external carbon source addition while maintaining effective denitrogenation
Solution Approach 2:
The circumfluent zone acts as an intermediary component that facilitates carbon source utilization. It creates a controlled environment where organic matter can be efficiently converted and transferred to support denitrification processes, bridging the gap between carbon source availability and denitrogenation requirements
2Manufacturing precision
If traditional denitrogenation methods are used, then the treatment process is simple, but the discharge standard for total nitrogen cannot be met (e.g., 5 mg/L standard)
Solution Approach 1:
The system is divided into distinct functional zones: anoxic zone for denitrogenation, circumfluent zone for carbon source circulation, aerodynamic zones for nitrification, and rapid sedimentation zone for solid-liquid separation. This segmentation allows each zone to optimize its specific function while collectively achieving the 5 mg/L total nitrogen discharge standard
Solution Approach 2:
The circumfluent zone introduces a new dimensional aspect to the treatment system by creating a circular flow path that enables multi-pass utilization of carbon source. This dimensional change allows the system to achieve higher nitrogen removal efficiency without proportionally increasing system volume or complexity
3Manufacturing precision
If carbon source is added to enhance denitrogenation, then total nitrogen removal efficiency improves, but operational costs increase
Solution Approach 1:
The system recovers and reuses organic matter that would otherwise be discarded. The circumfluent zone captures organic compounds and circulates them back into the denitrification process, converting waste organic matter into valuable carbon source for denitrifying bacteria, thereby eliminating the need for external carbon source addition
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 system effectively reduces total nitrogen levels in discharged water to below 5 mg/L, meeting stringent discharge standards with improved efficiency and reduced carbon source requirements.
Implementation Method 1
air is supplemented to the water body, which is capable of partially oxidizing the ammonia nitrogen in the sewage into nitrite
Implementation Method 2
a rapid sedimentation zone in communication with the second aerodynamic zone, which rapid sedimentation zone is provided with a water outlet
Data Source
AI summary
The present invention provides Biological Double efficiency Product (BDP) sewage denitrogenation treatment systems and methods.