Aru district developing sea water processing technology

Antara News, Fri, May 27 2011

Ambon, Maluku (ANTARA News) - The Aru Islands District administration in Maluku province is currently developing a technology to process sea water into clean water.

The sea water processing technology is being developed in four villages which have been facing clean water problem so far in the district, head of Aru`s public works department, Ongky Nanulaita, said here on Friday.

He said the application of such a technology has been developed since 2010 by adopting it from Maldives city of Male to ensure the availability of clean and potable l water for the local people`s consumption.

Four villages where the technology is being developed are Kujabi in Aru Tengah Timur sub-district, Marlase in Aru Utara sub-district, Benjina in Aru Tengah sub-district, and Langgarapara in Aru Tengah Selatan sub-district.

"The application of the sea water processing technology in Aru Islands District began with a comparative study in Maldives whose area`s characteristic is the same as that in Aru," Ongky said.

He said it was a new breakthrough in Aru which is mostly made up of low-lying rocky areas.

"With that technology we guarantee the availability of clean healthful water for the local community," Ongky said, adding that the district has lack of water catchment area, except the district town of Dobo.

Thus to maintain the water catchment area in Dobo, Ongky said development of settlement area there should be limited.

Asked if such a technology could also be developed at other villages in the district, Ongky said a careful evaluation was needed to decide if it was possible.

"The application of the technology in the four villages is a pilot project that has to be evaluated to find out if it can be developed as well in other villages," Ongki said.

Editor: Jafar M Sidik

Jakarta, Bandung need quake-proof buildings: Expert

The Jakarta Post, Jakarta | Mon, 05/16/2011

Jakarta and Bandung need regulations to standardize earthquake-proof buildings to avoid massive casualties should major tremor take place, an expert says.

“We should prepare the buildings as soon as possible so that they would not collapse once earthquake hit the two cities,” said I Wayan Sangara, a member of the Bandung Institute of Technology team tasked to map Indonesia's quake-prone regions.

Such a regulation was currently being discussed by the Public Works Ministry and National Standardization Agency, Wayan said Monday as quoted by tempointeraktif.com.

Earlier, Presidential special staff Andi Arief said Jakarta and Bandung were prone to earthquakes measuring up to 8.7 on the Richter scale, whose epicenter could be in the Sunda Strait.

“But Bandung has a higher exposure to earthquakes than Jakarta,” he added.

Both Jakarta and Bandung have the potential to experience medium-level quakes.

Data shows that most major earthquakes in Indonesia hit the coastal regions of West Sumatra and South Java, while other regions, such as Borneo, Riau Islands province and Batam experience milder quakes.

Dutch hothouses could help solve world food crisis

RNW, 2 May 2011, by Johan Huizinga

(Photo: RNW)

Dutch hothouses used to have a reputation for wasting energy. But nowadays it’s the most innovative sector in the Netherlands, producing food extremely efficiently using sustainable energy. Even the Chinese are interested.

China, like the Netherlands, does not have enough agricultural land to feed its own population. Dutch intensive greenhouse systems could help increase food production in China.

Professor of greenhouse farming at the Agricultural University of Wageningen Olaf van Kooten explains:

“Cultivation under glass is extremely efficient in its use of water and energy. In the future, we will have to feed around 15 billion people across the world, and this could be a key to the solution.”

Water

Excess warm water is stored
underground (Photo: RNW)

Stef Huisman grows tropical plants and trees for offices. He uses a closed water system. His nursery has trees standing in two to three centimetres of water. Every week, the water is filtered for sand and ultra violet rays and reused.

“That is all the water we need. The rain that falls on the roof is enough to water the plants. We don’t use any ground water.”

Professor Van Kooten thinks this technique could be an important export product.

“If we continue like this, the only water we use will literally be the water in the product. To produce a kilo of tomatoes, you will only need a litre of water.”

Ground heat

Water is pumped from a depth of
three kilometers (Photo: RNW)

The use of the ground heat to heat the greenhouses is just as important. Ted Duijvestijn has drilled a 3-kilometre-deep shaft to heat his tomato greenhouses in Pijnacker. The system pumps salt water which is 75 degrees Celsius upwards to the greenhouses. Once the water cools it is pumped back into the ground, where it reheats again.

The system, which was installed in March, is already making 60 percent savings. Once the electric pumps are powered by his own windmills, the greenhouses will more or less only run on sustainable energy. There will even be excess energy and warm water produced so that greenhouse owners will also become energy suppliers.

LED lighting

Rob Baan uses four colours in
LED-lighting (Photo: RNW)

And then there are the lights which are used to help plants grow. Vegetable grower Rob Baan has replaced his with low-energy LED lights which give exactly the right colour. Next to the greenhouse is a windmill to provide the energy for the LED lights.

In the summer the greenhouses are heated by the sun, producing temperatures above 50 degrees. Excess warmth is used to heat water, which is stored underground for the winter.

No pesticides

Wouldn’t it be easier to cultivate food in regions where no greenhouses are needed. Mr Baan very firmly says “No.”

“There are no insects here. Our greenhouses are either free of insects or we have predators in the greenhouses which eat them. We do not spay pesticides on the plants. Our production methods are becoming more and more sustainable. In the future, these kind of farms will be built close to cities, so that food can be produced locally.”

Meanwhile he has started up his own businesses in the United States and Japan.

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