Kitchen Waste Recovery Train for Biogas, Biodiesel, and COD Removal
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Solution Overview
Problem
Existing kitchen waste treatment technologies in China face insufficient attention to source reduction, inadequate treatment capacity, and low treatment levels, leading to inefficient resource utilization and pollution discharge.
Innovation Solution
A synergistic device comprising a pretreatment system, centrifuge, flocculation/flotation tank, anaerobic fermentation tank, anaerobic ammoniation system, OAO system, and electrocatalytic ozone synergistic treatment system, which sequentially process kitchen waste to recover resources and energy while reducing pollution and carbon emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If kitchen waste is treated using conventional methods, then treatment capacity is limited, but resource recovery efficiency is insufficient
Solution Approach 1:
The treatment system is divided into multiple functional modules: pretreatment system for sorting and dewatering, centrifugal separation system for solid-liquid separation, anaerobic fermentation system for biogas production, aerobic decomposition system for composting, and water treatment system. Each module handles specific tasks to maximize resource recovery while maintaining high treatment capacity
Solution Approach 2:
Multiple treatment processes are combined into an integrated system where pretreatment, separation, fermentation, decomposition, and water treatment operations work synergistically. The system merges resource recovery functions (biogas, compost, fertilizer) with pollution treatment functions in a unified processing flow
2Loss of substance
If kitchen waste is subjected to comprehensive treatment, then resource and energy recovery is maximized, but device complexity increases
Solution Approach 1:
The complex treatment process is segmented into distinct functional units: pretreatment module with sorting and dewatering, centrifugal separation module, anaerobic fermentation module, aerobic decomposition module, and water treatment module. This segmentation allows comprehensive resource recovery while managing system complexity through modular design
Solution Approach 2:
The system is designed with multi-functional components that perform multiple operations. For example, the pretreatment system simultaneously conducts sorting, crushing, and dewatering; the centrifuge performs solid-liquid separation and grease extraction; the fermentation tank produces biogas while reducing organic load
3Object-affected harmful factors
If kitchen waste is not treated effectively, then pollution discharge increases, but treatment level remains low
Solution Approach 1:
The system employs parameter changes to enhance treatment effectiveness: controlling temperature and pH in anaerobic fermentation tanks to optimize biogas production; adjusting aeration parameters in aerobic decomposition tanks to maximize compost quality; modifying chemical parameters in water treatment to ensure discharge standards are met
Solution Approach 2:
The system replaces simple mechanical treatment methods with advanced biological and chemical processes. Anaerobic and aerobic biological treatment systems replace basic mechanical separation; electrocatalytic oxidation and advanced oxidation processes replace conventional chemical treatment, achieving higher treatment levels and better pollution 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
The device effectively recovers resources and energy from kitchen waste, achieving pollution reduction and sustainable development by extracting biodiesel from grease and composting waste residue, producing biogas through anaerobic fermentation, and ensuring waste water meets discharge standards with over 80% COD removal.
Implementation Method 1
The centrifuge is used for further separating liquid treated by the pretreatment system
Implementation Method 2
The flocculation/flotation tank is used for removing suspended matters and microbubbles from the liquid treated by the centrifuge
Implementation Method 3
The flocculation/flotation tank is used for removing suspended matters and microbubbles from the liquid
Implementation Method 4
The anaerobic fermentation tank is used for removing organic matters in the liquid
Implementation Method 5
a filter residue outlet of the crushing filter press and a solid matter outlet of the three-phase separator are respectively communicated with the aerobic degradation tank
Implementation Method 6
The electrocatalytic ozone synergistic treatment system is used for rapidly degrading the organic matters in the liquid and removing the COD
Data Source
AI summary
A synergistic device for resource and energy recovery, pollution reduction and carbon reduction of kitchen waste is provided, and relates to the technical field of kitchen waste treatment. Main structures of the synergistic device include a pretreatment system, a centrifuge, a flocculation/flotation tank, an anaerobic fermentation tank, an anaerobic ammoniation system, an OAO system and an electrocatalytic ozone synergistic treatment system which are connected in sequence.