马鞍山工业吸尘器厂家(枣庄大型工业吸尘器) (今日更新中)

Beijing is planting trees and plants along riverbanks instead of covering them with concrete to fix its river system. It has taken almost 10 years for the capital to accept and use this idea. The ecosystems in the streams are gradually coming back to life because of the cleaner water, providing a good habitat for animals and plants, and ideal leisure sites for local residents.  Zhuanhe which connects with Kun Ming Lake in the Summer Palace is one of successful example of the river ecological treatment in Beijing. "In Beijing, there are 52 rivers with a total length of 520 kilometers inside the sixth ring road. Yongding and Jingmi rivers are the city's two main water sources, and Qinghe, Bahe, Tonghui and Liangshui are key drainage waterways," said Yu Kongjian, dean of the Sight Engineer Institute with Peking University. Originally, Beijing only wanted to control the floods by letting water flow out as soon as possible. Therefore, riverbanks were cemented down in order to prevent water leakage and the growth of plants, which could slow the water speed down. However, the shortage of rainfall in Beijing since 1999 showed that this method was not correct. On the one hand, streams had less fresh water to clean themselves. On the other, more polluted water was dumped into the rivers as more people moved into the capital. And in the summer of 2001, something bad happened. "The rivers in Beijing turned blue overnight and gave off a smelly odor," said Liu Peibin, vice engineer of Beijing Water Authority. There was an algae bloom due to so much pollution in the water. Algae covered the water surface and consumed most of the oxygen, and many creatures in the water died as a result. These "concrete pools" became the haven for swarms of mosquitoes which forced tens of thousands of residents nearby to close their windows and doors tightly especially in summer days. The water authorities had to act quickly for public safety. The first step was to demolish the concrete covering the riverbanks. The soil was exposed to water again, and the water could circulate down to the riverbank. Secondly, in order to stimulate oxygen in the streams, engineers put big stones in the water to create mini waterfalls. And they grew trees like willows and plants such as bulrush along the riverbanks. "Bulrush can purify polluted water through absorbing nitrogen and phosphorus in the water and exhaling oxygen," Deng added. "Gradually Zhuanhe came back to life and got rid of the polluted and smelly water. This would be impossible today if the brook was still covered in concrete." "What we did with Zhuanhe is a milestone in the progress of river treatment with new ecological ideas," said Deng Zhuozhi, vice engineer of Beijing Water Project Institute. He took charge of the Zhuanhe project. "How to fix up rivers depends on our attitude towards floods. We should learn to make friends with floods in a country where two-thirds of China's cities are short of water. Therefore we should reserve water as much as possible instead of discharging it ineffectively," said Yu.

WUXI: Premier Wen Jiabao has demanded a thorough investigation of the Taihu Lake crisis, which has affected the drinking water supply of about 2 million people. Efforts to protect the lake from further pollution are also to be scrutinized. "The pollution of Taihu Lake has sounded the alarm for us," Wen said in a directive to a symposium held by the State Council here yesterday. Taihu Lake, which was once a scenic attraction famous for its aquatic life, including shrimp, lily and water chestnuts, has been heavily polluted by industrial, agricultural and domestic waste. Wen said efforts had been made to reduce pollution in Taihu Lake in recent years. "But the problem has never been tackled at the root," he added. He asked participants in the symposium, including officials from central and local governments, environmental workers, scholars and researchers, to thoroughly investigate the Taihu Lake crisis so that concrete measures could be drawn up in response. Vice-Premier Zeng Peiyan, who attended the symposium, told governments at all levels to work to prevent algae blooms and ensure the safety of drinking water. Zeng asked local governments to continue collecting the blue-green algae, intensify monitoring of water quality, ensure the water supply and divert more water from the Yangtze River to flush out the pollution. He also asked environmental watchdogs to strengthen supervision and punish factories that discharge pollutants into Taihu Lake. At the meeting, all towns around Taihu were ordered to establish sewage treatment plants. Chemical factories will have to meet a new water emissions standard by the end of June next year. Towns must set up sewage treatment plants and are forbidden from discharging untreated sewage into Taihu Lake or rivers in the Taihu valley. Existing plants must install nitrogen and phosphorus removal facilities before the deadline, according to the plan announced at the meeting. Chemical factories that fail to meet the new water emissions standard risk suspension. They will be shut down permanently if they fail to meet the standard by the end of next June. The new water emission standard for the Taihu area will raise the bar for sulfur dioxide emissions and chemical oxygen demand. China Daily-Xinhua

SHANGHAI: A revised rule that forces shipping companies to shoulder the cost of cleaning up pollution from maritime accidents, such as oil spills, in China's waters, is likely to take effect next year, if not sooner, a senior official with China Maritime Safety Administration (MSA) said Wednesday.If the revised regulation is approved by the State Council, companies such as Sinopec, PetroChina and the China National Offshore Oil Corp (CNOOC) will be required to contribute to a special compensation and clean-up fund, Liu Gongcheng, executive director of China MSA, said.Liu told a press conference prior to the 2007 Shanghai International Maritime Forum, which kicked off Wednesday, the fund will boost the country's emergency response capabilities to maritime pollution disasters.The official declined to say how big the fund could be.The rules also include a scheme asking all ships using its seawaters to purchase insurance.Liu said the mechanism, already in the pipeline for two years, is one of China MSA's measures to handle possible oil spill pollution, as the ocean environment faces greater pressure with increased shipping traffic, including oil cargo ships to and from China's coast.Figures showed more than 90 percent of China's oil imports - 145 million tons last year - is transported by sea. Some 163,000 tankers of all sizes sailed into and out of China's ports last year, an average of 446 every day."The size of oil tankers is also getting bigger, up to 300,000 tons, which has added to the risk," Liu said. "If only 1 percent of the oil is spilled, we will be confronted with a catastrophe."Oil spills can wreak havoc on sea life, fishing and tourism. They cost millions of yuan to clean up and even more in compensation and damages, he said.The oil spill from the tanker Prestige, which sank off Spain in November 2002, leaked 77,000 tons of oil that caused several billion dollars worth of damage.In the past year, there have been several oil spills in domestic seawaters that involved 500 to 600 tons of oil, but didn't cause serious pollution due to emergency response, Liu said.Losses caused by ships using international waters can be covered by insurance in accordance with international conventions.However China urgently needs a mechanism to cover the costs many small- and medium-sized ship owners cannot afford."It is not fair to let the clean-up companies shoulder the cost, so the compensation fund can be especially useful in that situation," he said.The administration is continuing to invest in facilities and enhance China's emergency response capabilities.

BEIJING, March 25 (Xinhua) -- China's upcoming growth enterprise board for small start-ups to raise funds is no threat to the main stock market, Yao Gang, new vice chairman of the China Securities Regulatory Commission (CSRC), said here Tuesday.     His comments followed continuous declines in China's bourses partly caused by fears of capital shortages after a series of restraining measures and huge refinancing.     "The market is not short of money but of better and more attractive investment products," said Yao in an online interview.     CSRC statistics showed the average market capitalization of the222 companies listed on the Shenzhen small and medium-sized enterprises (SMEs) board was only 300 million yuan.     The number would be even lower, ranging from 100 million to 200million yuan, on the growth enterprise board, he said.     Therefore the capitalization of listing 100 such enterprises would only match one major enterprise on the Shanghai Stock Exchange, he said.     The CSRC began to solicit opinions on the growth enterprise board on March 21. Shang Fulin, CSRC chairman, said in January the board would be opened on the Shenzhen Stock Exchange in the first half of 2008.     Lack of finance has been a problem for China's 42 million small and medium-sized enterprises, more than 95 percent of which are privately owned.     Less than 2 percent of the SMEs access funds directly from the financial market, according to statistics from the National Development and Reform Commission.

来源：资阳报