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Sludge Dewatering Facility of Dihua Sewerage Treatment Plant, Sewerage Systems Office, received “Second Place in the 2015 Taipei City Creative Proposal Awards”.

  1. Proposal in Brief:

By setting up the sludge reduction facility in Dihua Sewerage Treatment Plant, the average 80% moisture dehydrated sludge can be further reduced down to less than 10% via indirect heating,

  1. Proposal in Brief:

By setting up the sludge reduction facility in Dihua Sewerage Treatment Plant, the average 80% moisture dehydrated sludge can be further reduced down to less than 10% via indirect heating, thus the average 90 tons of dehydrated sludge per day can be significantly reduced to less than 20 tons. The new facility not only helps with the more effective disposal of waste sludge, but also saves public funds and reduces the impact of sludge transportation on the environment.

  1. Effects of Implementation:
  2. Creativity: The project is the very first engineering work of its kind conducted by the public sector in Taiwan. The dehydrated sludge could be reused as architectural materials, soil amelioration ingredients, roadbed materials, permeable bricks, aggregates in concrete and lightweight aggregates, etc. Based on the idea of energy saving and sustainability, gas consumption and recycled water in the plant are reused to save gas and water. The proposal was awarded “Grade Two” in the participated engineering category of the “Outstanding Public Construction Awards” of Taipei City Government and rated “Merit” in the “Facility” category of the “Excellent Public Construction Quality Awards” by the Public Construction Commission, Executive Yuan.
  3. Benefits: As the cost of sludge disposal is gradually increasing year by year, based on calculations of current waste disposal cost (market price is approx. NTD5,000 per ton), it is estimated to take only four years to recover the cost for the dewatering facility installation if the moisture rate of dehydrated sludge is down to 10%.
  4. Applications: The operation involves constantly feeding the sludge generated from the dehydration room into the drying machines on a daily basis, then using hot kerosene oil (temperature maintains at between 124~226℃) to indirectly heat the sludge for approximately four to six hours. The dehydrated sludge will be transported via the conveyor machine for direct airbag packing and then sent to the terminal landfills. The dehydrator can reduce the moisture rate from 80% to less than 3%, as well as decreasing the sludge volume, making the dream of “turning waste into useful resources” come true. The reuse of dehydrated sludge as material, fuel and fertilizer is the goal that the team will keep working on to achieve.
  5. Customer-oriented: Currently in Dihua Sewerage Treatment Plant the average moisture rate of dehydrated sludge is 80%, with nearly 90 tons of volume produced per day. Since the number of terminal landfill sites is limited domestically, by dropping the moisture rate to less than 10% and daily volume to under 20 tons, the burden on landfills can be significantly reduced. The number of waste removal trucks can also be cut from five trucks per day to only one. This not only helps reduce the impact of transportations on the environment, but also achieves energy conservation and carbon reduction by solving problems of surplus heat emission of gas consumption.

Sludge Dewatering Facility of Dihua Sewerage Treatment Plant, Sewerage Systems Office, received “Second Place in the 2015 Taipei City Creative Proposal Awards”.