MENGJi-an,ZHONGDa-wen,SUNHao,et al.Full-scale Study on SEUE-WAO Sludge Wet Air Oxidation Process[J].China Water & Wastewater,2023,39(15):1-7.
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Full-scale Study on SEUE-WAO Sludge Wet Air Oxidation Process

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第15期 Page: 1-7 Column: Date of publication: 2023-08-01
Author(s):
MENG　Ji-an1; 2;  ZHONG　Da-wen3;  SUN　Hao2; 4;  QIN　Wei5;  DAI　Ding-jun6
（1. School of Aerospace Engineering， Tsinghua University， Beijing 100084， China； 2. Tsinghua Suzhou Environmental Innovation Research Institute， Suzhou 215000， China； 3. School of Nuclear Science and Engineering， North China Electric Power University， Beijing 102206， China； 4. School of Mechanical Engineering， Jiangnan University， Wuxi 214000， China； 5. State Key Joint Laboratory of Environmental Simulation and Pollution Control， School of Environment， Tsinghua University， Beijing 100084， China； 6. Ningbo Hrale Plate Heat Exchanger Co. Ltd.， Ningbo 315506， China）
Keywords:
sludge treatment;  wet air oxidation;  reduction;  resource utilization
Abstract:
This paper developed a new sludge wet air oxidation process, namely SEUE-WAO process, and carried out a production test with scale of 25 t/d (sludge moisture content was 80%). The process broke the microbial cell walls in high temperature, high pressure and oxygen-rich environment, resulting in the hydrolysis and oxidation of organic matters to generate small molecular organic acids, CO2 and water, so as to achieve the reduction, harmlessness and stabilization of sludge. The reaction heat was deeply recovered through the integrated heat exchange-reaction technology. The power consumption was less than 60 kW·h/t, and the moisture content of the dewatered sludge cake was decreased to less than 35% without adding chemical agents. The disposal method of the sludge cake was flexible, which could be used for landscaping and incineration, and used as raw material additives for the production of packaging cardboard and building materials such as ceramsite and brick. The separation liquid had the potential to be used as denitrifying carbon sources in wastewater treatment plants. The production test showed that the process had the advantages of ultra-low energy consumption, high safety and reliability, environmental friendliness, short treatment cycle, small footprint area and significant carbon emission reduction.
Last Update: 2023-08-01