Water Recycle

Executive Summary

The world is always working for water conservation and efficiency. And there is a difference between water conservation and water efficiency. Water efficiency differs from water conservation in that it focuses on reducing waste. A proposition is that the key for efficiency is reducing waste, not restricting use.

In that manner, we decide to reduce the wastages during the production of purified drinking water- with the method of recycling.

Why recycle water?

 Reduce demand on water sources

  Reduce water costs

  Reduce process costs

   Independent control of water

Problems with recycled water

  Customer cannot change the thought of drainage (yuk Factor)

  Initial Cost of Storage and additional pumping cost.

  More careful monitoring and management are needed.

Introduction

Waterhealth India (WHIN) has an installed base of over 275 Waterhealth Centers (WHC) in Andhra Pradesh, Gujrat and Maharashtra reaching over 1.5 million rural population. WHIN's business model focuses on complete water solutions rather than only setting up water treatment facilities. According to our recent study in water wastage it is observed that the wastage is nearly equal to the production. Whilst considering the water efficiency, the Special project for recycling the waste water has been developed for reducing the water wastage.

Analysis

Based on the study the types of wastage have been identified. The types of wastages are:-

 Draining of sludge from the raw water tank

 Daily back wash of filtration systems.

 Reject water from RO systems.

 Can flushing by the customers from the tap bank drain.

Process:

Based on the analysis, the RO reject is having low TDS, where the source is a pond or a RWS filter bed of lower TDS. The drain from daily back wash and the tap bank drain will be blended with the reject water to reduce the TDS further more for recycling. The process divided into three stages:-

Initial stage: The sump is filled with half of the backwash water of DMF, ACF and half of RO reject water through filtration sump, and this water is pumped to raw water tank.

Second stage: The sump is filled RO reject water, and this water is pumped to raw water tank.

Final