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Secondary Treatment

Secondary treatment focuses on biological carbon and nutrient removal from wastewater to comply with the effluent discharge limit. The secondary treatment process must meet increasingly stringent current and future water quality standards. In particular, existing treatment plants need to be retrofitted efficiently and economically in order to comply with the increasingly demanding water quality standards.

Selection of sewage treatment process is affected by discharge standards, raw wastewater quality, and local (site) constraints. Tomorrow Water does not provide a simple unit technology but a well-balanced process after considering the various constraints of the site and the needs of clients. Based on our experience, our clients looking for secondary treatment fall under one or more of these three broad categories. 

   1. Looking to treat High Concentration in Small Quantities
  2. Looking to treat Low Concentration in Large Quantities
  3Looking for Energy- Saving, No External Carbon Source

Tomorrow Water offers unique solution to each of the problems listed above. 

Solution #1


BCS

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Solution #2
BBF

 

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Solution #3


Anammox

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BCS is equipped with Smart controller which provides suitable operation modes according to various operating conditions and is suitable for small scale treatment plants with relatively high concentration and high load fluctuation. In order to comply with necessary discharge water quality standards, it can operate in various modes such as organic removal mode, nitrification / denitrification mode, and phosphorus removal mode.

Since the BBF process is a submerged attached growth process, it is suitable for sewage with relatively low concentration and high fluctuating flow rate. It is possible to construct a compact structure when the existing plant has limited space for expansions. BBF can perform stable nitrification even at low temperature, making it a suitable process for areas where there is concern for decreased efficiency due to cold temperatures.

There are many limitations in applying the Anammox process to the Main Stream. Tomorrow Water offers various solutions that overcome limitations such as removal of dissolved organic matter, stable nitritation, and prevention of Anammox microorganisms washing out.

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