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Lake in Nanjing again polluted
By Cai Wenjun |
September 10, 2011, Saturday
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Print Edition
Print Edition
WASTE milk discharged from a dairy plant was confirmed to be the pollutant that dirtied Baijiahu Lake in Nanjing City - at least the fourth time the white pollutant covered most of the lake, yesterday's Yangtze Evening News reported.
Residents complained that a large swath of white pollutant was again found on the lake on Thursday. The environment watchdog in the capital city of Jiangsu Province said it has ordered Nanjing Chuantian Milk Products Co to renovate its sewage treatment within three months.
The plant admitted that its waste water processing isn't in line with the national standard, but it denied its waste polluted the lake.
An official surnamed Wang at Nanjing's Jiangning District Environmental Protection Bureau told the newspaper that the waste water was from the plant but he didn't know how the pollutant got into in the lake.
Wang said the chemical oxygen demand, a test for pollutants, in the plant's waste water was too high for it to be discharged into the sewage treatment plant, let alone Baijiahu Lake.
People living at a nearby residential complex said the white pollutant first appeared a year ago, entering the lake through drainage pipes that are used as rainwater pipes. There were four drainage pipes connected to the lake and the "milk-like waste" was put into the lake secretly every week or two, especially at night or on rainy days, residents said.
Deliberate act?
A person involved in underground drainage network construction in the area said the four drainage pipes are connected to a main rainwater pipe and shouldn't generate water if the rainfall is not heavy. He suspected someone illegally connected sewage drainage with the pipes to make waste water flow into the lake.
"The weather forecast said it will rain heavily today. So the discharger may have discharged pollutant today as the waste water could be diluted by rainfall," he said on Thursday. "But it didn't rain. That's why the illegal discharge was detected by residents."
The lake also is plagued by domestic sewage produced by nearby residents. That's blamed on the limited treatment ability of the local sewage plant, which can process only about 3,000 tons of sewage, while the area is producing over 10,000 tons.
Residents complained that a large swath of white pollutant was again found on the lake on Thursday. The environment watchdog in the capital city of Jiangsu Province said it has ordered Nanjing Chuantian Milk Products Co to renovate its sewage treatment within three months.
The plant admitted that its waste water processing isn't in line with the national standard, but it denied its waste polluted the lake.
An official surnamed Wang at Nanjing's Jiangning District Environmental Protection Bureau told the newspaper that the waste water was from the plant but he didn't know how the pollutant got into in the lake.
Wang said the chemical oxygen demand, a test for pollutants, in the plant's waste water was too high for it to be discharged into the sewage treatment plant, let alone Baijiahu Lake.
People living at a nearby residential complex said the white pollutant first appeared a year ago, entering the lake through drainage pipes that are used as rainwater pipes. There were four drainage pipes connected to the lake and the "milk-like waste" was put into the lake secretly every week or two, especially at night or on rainy days, residents said.
Deliberate act?
A person involved in underground drainage network construction in the area said the four drainage pipes are connected to a main rainwater pipe and shouldn't generate water if the rainfall is not heavy. He suspected someone illegally connected sewage drainage with the pipes to make waste water flow into the lake.
"The weather forecast said it will rain heavily today. So the discharger may have discharged pollutant today as the waste water could be diluted by rainfall," he said on Thursday. "But it didn't rain. That's why the illegal discharge was detected by residents."
The lake also is plagued by domestic sewage produced by nearby residents. That's blamed on the limited treatment ability of the local sewage plant, which can process only about 3,000 tons of sewage, while the area is producing over 10,000 tons.
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