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Government mulling plan to upgrade Dan Region's sewage system
By Zafrir Rinat, Haaretz Correspondent
Tags: sewage system, Negev 

Government officials are working on a plan to revamp Israel's central sewage treatment system so it can cope with an increased flow in the Tel Aviv area. The move would also perhaps free up for construction land currently occupied by treatment facilities.

In a meeting two weeks ago, National Infrastructures Minister Benjamin Ben-Eliezer and Water Authority head Uri Shani decided to examine new ways to increase the capabilities of the Dan Region's treatment facilities, which handle one-third of the country's sewage.

"The plan is of strategic importance to the country and a major step toward dealing with the water crisis," Ben-Eliezer said.
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To date, sewage produced in the Dan Region has been treated via a process that allowed it to seep through sand dunes west of Rishon Letzion. After a six-month period, the cleansed water is pumped from the ground and used for agriculture in the Negev.

Some 150 million cubic meters of raw sewage currently undergoes this process. Since the 1980s, the quantity of raw sewage treated has grown sevenfold while the quantity of purified water has grown 25 times.

"The increase in sewage produced annually is 6 percent and the amount of land that can process it is finite," said Rafi Ifargan, an official at the Mekorot water company, which runs the sewage treatment facility. "Already some sewage is piped untreated into the sea because it cannot be processed."

The water authority is thus considering two alternatives to tackle the increase in sewage. The first is to find new areas for building sewage-treatment plants as well as places where sewage can be stored. Another alternative is building membranes that will filter sewage and replace the current system that relies on sewage-treatment pools.

Over 1,000 dunams are currently taken up by such pools. If they are closed, the area may be used to accumulate rainwater, which would increase the amount of water stored in the coastal aquifer. But some of the land may be used to build new buildings, a move that would be strongly protested by environmental groups, who want the area made part of a greenbelt.



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