BEIJING DRAINAGE GROUP CO., LTD (20240375985). SLUDGE AND KITCHEN WASTE COLLABORATIVE DIGESTION PROCESS COUPLED WITH INTERMEDIATE THERMAL HYDROLYSIS simplified abstract

SLUDGE AND KITCHEN WASTE COLLABORATIVE DIGESTION PROCESS COUPLED WITH INTERMEDIATE THERMAL HYDROLYSIS

Organization Name

BEIJING DRAINAGE GROUP CO., LTD

Inventor(s)

Jiawei Wang of Beijing (CN)

Qiligewa of Beijing (CN)

Wei Li of Beijing (CN)

Zhengran Ren of Beijing (CN)

Yang Wen of Beijing (CN)

Jilu Sun of Beijing (CN)

Yao Liu of Beijing (CN)

SLUDGE AND KITCHEN WASTE COLLABORATIVE DIGESTION PROCESS COUPLED WITH INTERMEDIATE THERMAL HYDROLYSIS - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240375985 titled 'SLUDGE AND KITCHEN WASTE COLLABORATIVE DIGESTION PROCESS COUPLED WITH INTERMEDIATE THERMAL HYDROLYSIS

The present disclosure pertains to a collaborative digestion process for sludge and kitchen waste coupled with intermediate thermal hydrolysis. This process optimizes the utilization of material properties and reduces the generation of non-degradable substances.

• Screening and slurrying kitchen waste, desanding, and deslagging primary sludge.
• Mixing kitchen waste and primary sludge for first-stage collaborative anaerobic digestion.
• Mixing the digestion product with residual activated sludge and centrifugal dehydration.
• Thermal hydrolysis on the dehydrated sludge cake, followed by desanding.
• Dilution, heat exchange, second-stage anaerobic digestion, plate-frame dehydration.
• Anaerobic ammonia oxidation on the filtrates, compounding sludge cake nutrients for organic nutrient soil production.

1. 1. 1. Potential Applications:

This technology can be applied in sewage treatment plants to improve biogas yield and energy self-sufficiency.

1. 1. 1. Problems Solved:

This process reduces the generation of non-degradable substances, optimizes thermal hydrolysis, and enhances biogas output.

1. 1. 1. Benefits:

Improved biogas yield, reduced investment in thermal hydrolysis, and energy self-sufficiency for sewage treatment plants.

1. 1. 1. Commercial Applications:

This technology can be utilized in municipal sewage treatment plants to enhance biogas production and reduce operational costs.

1. 1. 1. Prior Art:

Prior research has focused on individual sludge or kitchen waste treatment processes, but the collaborative digestion process with intermediate thermal hydrolysis is a novel approach.

1. 1. 1. Frequently Updated Research:

Ongoing research focuses on optimizing the thermal hydrolysis process and further improving biogas production efficiency.

1. 1. 1. 1. Questions about Sludge and Kitchen Waste Collaborative Digestion Process:

1. How does the collaborative digestion process optimize the utilization of material properties? 2. What are the key benefits of reducing the generation of non-degradable substances in the digestion process?

Original Abstract Submitted

the present disclosure belongs to the technical field of sludge treatment, and discloses a sludge and kitchen waste collaborative digestion process coupled with intermediate thermal hydrolysis. the collaborative digestion process includes: 1) screening and slurrying kitchen waste, and desanding and deslagging primary sludge; 2) mixing the kitchen waste and the primary sludge, and carrying out first-stage collaborative anaerobic digestion on the mixture; 3) mixing the first-stage collaborative anaerobic digestion product with residual activated sludge, and carrying out centrifugal dehydration; 4) carrying out thermal hydrolysis on the dehydrated sludge cake; 5) desanding the thermally-hydrolyzed sludge; 6) diluting the desanded thermally-hydrolyzed sludge followed by heat exchange; 7) carrying out second-stage anaerobic digestion; 8) carrying out plate-frame dehydration; 9) carrying out anaerobic ammonia oxidation on the filtrates; and 10) compounding sludge cake nutrients to produce organic nutrient soil. in the present disclosure, good complementarity of sludge and kitchen waste in terms of material properties is fully utilized, configuration of thermal hydrolysis is optimized, generation of non-degradable substances is reduced, and investment on thermal hydrolysis is reduced. a biogas yield and a biogas output are improved, and energy self-sufficiency of a sewage treatment plant is realized on the basis of a centralized treatment method of regional organic solid waste.