Water Pinch Analysis

Maximize water efficiency at minimum capital expenses


Water Pinch Analysis (WPA) is a systematic technique for reducing water consumption and wastewater generation through an integration of water-using activities or processes. A key target of water pinch analysis is maximizing water reuse and minimizing the amount of wastewater. Considers water reuse opportunities by carefully analyzing flows & quality of different streams.

WPA

 


Possible water reuse options are identified by matching different “sources” and “sinks”. “Sources” are defined as streams coming out of processes carrying, often multiple, contaminants whilst “Sinks” are streams going into processes that often have specific water quality requirements. The identified sources and sinks together with their mass flow rates and water quality data are encoded into the water pinch software and forms as a basis to starting the analysis.

WPA Approach

Approaches to water minimisation

Process Changes

❯ Replace Technology

❯ Modify Equipment’s operating
   conditions





Water Reuse

❯ Reuse wastewater from operation as input to another process

❯ Water Reuse reduces overall fresh water and wastewater volumes, but does not affect contaminant loads

Regenerative Reuse

❯Treat waste water reduce the levels off contaminants and reuse it in other processes

❯ Both volumes and contaminant loads are reduced



Regenerative Recycling

❯ After regeneration, recycle water to the process from which it came.

❯ Recycling tends to build up contaminants system.