Shortcut Nitrification via Inorganic Hydroxylamine Accelerator
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Solution Overview
Problem
Existing shortcut nitrification methods for sewage treatment require additional sludge treatment facilities and the addition of large amounts of ammonium salts or hydroxylamine salts, leading to energy waste and increased burden on the sewage treatment system.
Innovation Solution
A shortcut nitrification method involving the addition of a shortcut nitrification accelerator composed of 2-30 parts by weight of inorganic hydroxylamine and 0.1-20 parts by weight of inorganic ammonium salt to sewage, maintaining a pH of 6.50-6.95, to enhance nitrite accumulation and facilitate shortcut nitrification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large amount of ammonium salt or hydroxylamine salt is added to realize shortcut nitrification, then the nitrite accumulation rate is improved, but energy consumption and system burden increase
Solution Approach 1:
The patent changes the chemical parameters by using specific inorganic hydroxylamine salts (ammonium hydroxylamine sulfate, ammonium hydroxylamine carbonate, or ammonium hydroxylamine phosphate) at optimized concentrations (2-20 mg/L) and controlling pH within 6.5-6.95, achieving shortcut nitrification with reduced energy consumption compared to traditional methods requiring large amounts of ammonium salts
Solution Approach 2:
The patent introduces inorganic hydroxylamine salts as intermediary substances that facilitate the conversion of ammonia nitrogen to nitrite nitrogen by providing a direct chemical pathway that bypasses the need for large amounts of traditional nitrogen sources, thereby reducing energy consumption while maintaining high nitrite accumulation rates
2Quantity of substance
If additional sludge treatment facilities are established to handle increased sludge output, then sludge processing capability is improved, but infrastructure cost and floor space increase
Solution Approach 1:
The patent enables the sewage treatment system to self-manage sludge production by using inorganic hydroxylamine salts that reduce organic carbon source consumption, thereby decreasing organic sludge generation and allowing the existing system to handle sludge without requiring additional treatment facilities
Solution Approach 2:
The patent extracts and removes the need for additional sludge treatment infrastructure by optimizing the chemical composition (using inorganic hydroxylamine salts instead of organic carbon sources), which reduces sludge production at the source and eliminates the requirement for extra processing facilities
3Productivity
If constant temperature control is implemented to maintain optimal conditions for shortcut nitrification, then reaction efficiency is improved, but energy waste increases
Solution Approach 1:
The patent changes the approach from maintaining constant temperature to optimizing chemical parameters (pH 6.5-6.95 and hydroxylamine salt concentration 2-20 mg/L), which allows shortcut nitrification to proceed efficiently without the energy waste of constant temperature control
Solution Approach 2:
The patent introduces dynamic flexibility by allowing temperature to vary while maintaining optimal chemical conditions, replacing rigid constant temperature control with adaptive chemical parameter management that achieves high reaction efficiency without continuous energy input for heating or cooling
4Manufacturing precision
If inorganic hydroxylamine and inorganic ammonium salt are added in specific proportions, then shortcut nitrification efficiency is improved, but operational control complexity increases
Solution Approach 1:
The patent establishes specific parameter ranges (inorganic hydroxylamine 2-30 parts by weight, inorganic ammonium salt 0.1-20 parts by weight, pH 6.50-6.95) that simplify operational control by providing clear dosage guidelines, making it easier to achieve high shortcut nitrification efficiency without excessive complexity
Solution Approach 2:
The patent provides flexible dosage ranges rather than fixed values, allowing operators to apply partial or excessive action within acceptable limits (e.g., hydroxylamine concentration 2-20 mg/L) to achieve effective shortcut nitrification while simplifying operational decision-making
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 significantly improves the nitrite accumulation rate, reduces energy and carbon source consumption, and decreases sludge output, thereby enhancing the efficiency and cost-effectiveness of sewage treatment.
Implementation Method 1
adding a shortcut nitrification accelerator to sewage, wherein the shortcut nitrification accelerator comprises 2-30 parts by weight of inorganic hydroxylamine and 0.1-20 parts by weight of inorganic ammonium salt
Data Source
AI summary
The present application relates to the field of sewage treatment, and specifically relates to a shortcut nitrification method for sewage treatment. The shortcut nitrification method for sewage treatment provided in the present application comprises the following steps: adding a shortcut nitrification accelerator to sewage. The shortcut nitrification accelerator comprises 2-30 parts by weight of an inorganic hydroxylamine and 0.1-20 parts by weight of an inorganic ammonium salt. The pH of sewage is 6.5-6.95. The shortcut nitrification method for sewage treatment provided in the present application can significantly increase nitrite accumulation rate, and control a biological nitrification reaction at a stage of nitrite accumulation, thereby facilitating a wastewater denitrification process, improving the wastewater treatment effect, and having good engineering application value.