WANG Wei-kang,CAOYue,ZHONGYing,et al.Practice of Plant?wide Deodorization System in Maozhou River Sediment Treatment Plant in Guangming District, Shenzhen[J].China Water & Wastewater,2023,39(14):85-90.
Practice of Plant?wide Deodorization System in Maozhou River Sediment Treatment Plant in Guangming District, Shenzhen
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第14期
Page:
85-90
Column:
Date of publication:
2023-07-17
- Abstract:
- Maozhou River sediment treatment plant, which locates in Guangming District, Shenzhen, is the first permanent and full-enclosed sediment treatment plant in China. Odorous gas is inevitably produced at all stages of sediment treatment, and the discharge of odor pollutants shall comply with the second level limit at factory boundary specified in Emission Standards for Odor Pollutants (GB 14554-1993). According to the source and composition characteristics of odorous gas from the sediment treatment plant, the treatment process was divided into eight odor zones and two sets of deodorization systems (including the main deodorization system and the residual soil storage deodorization system). The main deodorization system with treatment capacity of 60 000 m3/h is for collecting the odors from the plate and frame press filter workshop, sludge circulation tank, conditioning tank, sedimentation tank, grit chamber and belt conveyor and other structures, and its process is spray washing coupled with biological deodorization. The residual soil storage deodorization system with treatment capacity of 30 000 m3/h collects the odor from the large space of the entire residual soil storage, and the deodorization process is spray washing. The design parameters of the deodorization process referred to the sludge treatment process of wastewater treatment plant. The two deodorization systems both adopt double-layer packing spray tower, the liquid-air ratio is 1.67 L/m3, and their retention times are 2.08 s and 2.16 s, respectively. The biological deodorization tower is packed with carbonaceous mixed packing media, the retention time is 18.7 s, and the retention gas velocity is 385 m/h. The sealing work consists of low cover, high cover and partition. After the deodorization system runs stably, the concentration of odor pollutants at the factory boundary meets the design standard.
Last Update:
2023-07-17