Dieffenbacher Supplies Treatment Plant to Hong Kong

Dieffenbacher has received an order from Hong Kong for its new Recycling business unit. The Eppingen-based company will supply two treatment lines for the size reduction and homogenization of organic waste for a fermentation plant.

In Hong Kong, one of the most technologically advanced fermentation plants for material and energy utilization of separately collected organic waste is currently under development. Led by Suez, the consortium of bidders responsible for the fermentation plant has tasked Dieffenbacher with planning, supplying and commissioning two fully automated treatment lines with a continuous infeed. Efficient and fully automated treatment technology is a fundamental procedural component of the fermentation plant. Using this technology, organic waste is reduced in size and homogenized and foreign materials embedded in the waste such as plastic, metal and glass are separated. Through a combination of fermentation and composting, both biogas and high-quality compost is created from the treated organic waste.

Example of a ClassiSizers: In this case, for the size reduction of recycled wood.

"This waste treatment order allowed us to successfully establish ourselves in the fast-growing Asian waste market," stresses Wolf-Gerd Dieffenbacher, Managing Director of the family-owned company from Eppingen, Germany. "This is a major success for our new Recycling business unit, as there is currently a high demand for waste recycling plants in this region."

In addition to the machine technology, the order also includes the control mechanism for the entire treatment plant, which comprises the infeed unit, size reduction system and system for separating foreign materials. The plant has a throughput of 228 tons per day and will be operational in Hong Kong in 2016.

Dieffenbacher will fulfill the order with the help of proweps envirotec GmbH, a company specializing in innovative concepts for waste recycling and renewable energy production. The management team of proweps envirotec has already participated in the implementation of 35 large-scale waste and biogas treatment plants and is responsible for the process-based planning of the treatment technology in this particular project. Together, the two companies offer complete process-based solutions for recycling organic waste.

The size reduction technology for organic waste is based on the principle of collision technology. This patented method ensures extremely efficient size reduction of organic waste and thus achieves a higher yield of biogas from the fermentation reactors. Compared to competitors' systems, this method consumes less electrical energy as no added water is needed for the size reduction process. After the organic waste is reduced in size, embedded foreign materials are successfully separated at a later stage in the process using filtering and sedimentation.