Strategy Development of Sludge Treatment and Disposal in Beijing Based on Thermal Hydrolysis Advanced Digestion
Barber, B. – AECOM
(free)
In this paper, strategy development of sludge treatment and disposal in Beijing is described. Over the last twenty years, nine WWTPs have been constructed to treat around 2.7 million m3/d of wastewater in Beijing, and produce around 2700 t/d dewatered sludge with partial treatment by digestion, drying, and composting. Due to the increasing demand of wastewater treatment as a result of increasing urbanisation and tighter effluent standards, an additional 1.5 million m3/d of wastewater will require treatment, and this is expected to produce totally 6000 t/d dewatered sludge. The Asian Development Bank commissioned a report to investigate the potential for thermal hydrolysis in Beijing as a means to deal with current site constraints and future sludge production. The report, in
combination with detailed technology reviews and due diligence resulted in the recommendation of Advanced Anaerobic Digestion of sludge based on Cambi® Thermal Hydrolysis pre-treatment in preference to thermal drying that had been their previous direction. Subsequently a strategic cooperation between Beijing Drainage Group and
Cambi Group has been formulated to implement five sludge projects in Beijing. These are based on two upgrades and expansions of Gaobeidian and Xiaohongmen WWTPs, and three brand new sludge projects either adjacent to Huaifang and Qing II WWTPs or Gaoantun Sludge center. The strategic decision to adapt Thermal Hydrolysis for advanced anaerobic digestion may have profound impact for sludge treatment in mega-cities in China, based on an emphasis of low carbon impact, green development and renewable energy generation. In this paper, a detailed description of the new sludge strategy and the estimated effects will be presented.
The Biosolids conference attracts the most authoritative global experts in the area of biosolids and organic resource handling, treatment and recycling. The programme covers both the latest innovations and updates of existing technologies. Presentations from respected industry experts and newcomers follow the development of technologies and legislation from inception to full-scale installations.
The conference regularly gathers over 200 delegates from all over Europe, many of them return every year both for the technical presentations and fantastic networking opportunities.
Regular conference themes include:
• Thickening and Dewatering
• Modelling Sludge Handling and Utilisation
• Commissioning and Operating Experiences with Thermal Hydrolysis
• Tackling Potential Odour Problems
• Operating Experiences and Potential Problems in Digester Operation
• Ensuring Optimum Energy Recovery from Biogas
• Liquor Treatment and P Removal
• Alternative Products from Sludge
• Enhancing the Value of Biosolids and Digestate
• Pathogens and Pollutants In Digestate
• Sharing Experiences
