Eco-house trials sewage plan
July 30, 2011, Saturday
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Print Edition
Print Edition
A local company is engaged in a number of eco-friendly projects including a small building that contains toilets that, with the help of solar power and wind-driven generators, ensure waste is treated efficiently.
In Chongming County's Yuejin Village, a demonstration project is showing how household sewage can be converted to agricultural and other uses.
It's all contained in a blue house designed by the Shanghai Hwaye Environmental Protection Co, which is based in Minhang's Xinzhuang Industrial Zone.
The company is one of the high-tech corporations recognized by the city government. It is engaged in a number of eco-friendly projects like small-scale sewage recyclable treatment system and zero carbon facilities.
The house doesn't look special from the outside, but inside its separate toilets for men and women are linked to a small sewage treatment room.
The secret lies in three cylinders linked with a sewage pipe. Through the pipe, sewage discharged in the house is transferred to the cylinders, which contain facilities to treat the effluent. The treated water can be used to clean the toilets, wash hands or water flowers, thus achieving zero discharge of wastewater.
The facility can also turn garbage and human excrement into fertilizer using reactors and filters inside the cylinders.
The cylinders are powered by solar panels and wind-driven generators installed on nearby lampposts.
"By day, the drainage network is powered by solar energy; by night, it's powered by wind," said Zhang Houguo, president of the company.
The system can treat 10 cubic meters of sewage discharged by eight to 10 households daily, Zhang said.
The cost of an eco-friendly house is about 60,000 yuan (US$9,231).
It took eight years for the company to do research and develop the project.
Sewage treatment is not an easy job in rural areas. Biogas digesters are a common way to treat garbage and wastewater in China's countryside. Wastes are turned into fuel and fertilizers after fermentation in the digesters.
The eco-house is easier to manage because it is automatic. It takes only three days to install and test facilities. The system can also be disassembled easily.
But many people still aren't aware of the technology available and that is hindering its application, Zhang said.
The project has been implemented in the city of Kashi in the northwestern Xinjiang Uygur Autonomous Region of China because Shanghai and Kashi have developed close ties to boost that remote city's development.
Zhang's company has won numerous awards for innovation.
In Chongming County's Yuejin Village, a demonstration project is showing how household sewage can be converted to agricultural and other uses.
It's all contained in a blue house designed by the Shanghai Hwaye Environmental Protection Co, which is based in Minhang's Xinzhuang Industrial Zone.
The company is one of the high-tech corporations recognized by the city government. It is engaged in a number of eco-friendly projects like small-scale sewage recyclable treatment system and zero carbon facilities.
The house doesn't look special from the outside, but inside its separate toilets for men and women are linked to a small sewage treatment room.
The secret lies in three cylinders linked with a sewage pipe. Through the pipe, sewage discharged in the house is transferred to the cylinders, which contain facilities to treat the effluent. The treated water can be used to clean the toilets, wash hands or water flowers, thus achieving zero discharge of wastewater.
The facility can also turn garbage and human excrement into fertilizer using reactors and filters inside the cylinders.
The cylinders are powered by solar panels and wind-driven generators installed on nearby lampposts.
"By day, the drainage network is powered by solar energy; by night, it's powered by wind," said Zhang Houguo, president of the company.
The system can treat 10 cubic meters of sewage discharged by eight to 10 households daily, Zhang said.
The cost of an eco-friendly house is about 60,000 yuan (US$9,231).
It took eight years for the company to do research and develop the project.
Sewage treatment is not an easy job in rural areas. Biogas digesters are a common way to treat garbage and wastewater in China's countryside. Wastes are turned into fuel and fertilizers after fermentation in the digesters.
The eco-house is easier to manage because it is automatic. It takes only three days to install and test facilities. The system can also be disassembled easily.
But many people still aren't aware of the technology available and that is hindering its application, Zhang said.
The project has been implemented in the city of Kashi in the northwestern Xinjiang Uygur Autonomous Region of China because Shanghai and Kashi have developed close ties to boost that remote city's development.
Zhang's company has won numerous awards for innovation.
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