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To fill energy - saving blank Beijing in 2015 sewage treatment energy consumption will be limited

To fill energy - saving blank Beijing in 2015 sewage treatment energy consumption will be limited

Published: 2014-12-10 | View Rate: 136 | Author: magnetic Valley Technology

Beijing Municipal Bureau of Quality Supervision recently announced that Beijing local standards "urban sewage treatment energy consumption limits" will be implemented on March 1 next year, so that more reasonable sewage treatment can play a role in energy-saving emission reduction. This is the first country for the sewage treatment energy consumption limits of the standard, the city's 91 sewage treatment plant energy consumption will face audit, sewage treatment to achieve a Class B standard, is expected to total energy saving of about 8%.

                    

At least 800,000 tons of sewage a day straight into the river

      "The city every day there are 800,000 to 100 million tons of sewage straight, the actual sewage treatment rate decreased after the Olympics." Beijing Municipal People's Congress Chairman of the Rural Committee Anyang Iron and Steel pointed out that the current overall situation of water pollution in the city is still grim.

    According to reports, the overall water quality of the North Canal is still inferior to the V class, small and medium-sized river outside the Fourth Ring Road, such as Xiao River, Xiaolonghe, dam River and other sewage cross-flow, river black and foul, all kinds of branches, fighting, furrows and road ditch Not dry is the accumulation of sewage. Ring to the rings surrounding the urban and rural areas, many new district and the unit of sewage does not have access to municipal pipe network, with or without the construction of sewage from the treatment facilities, sewage discharged into the river. In the rural areas outside the Fifth Ring Road, the coverage rate of sewage collection pipe network is very low; the gap of sludge treatment capacity is large and the temporary treatment measures are met, and more than 40,000 tons sludge is accumulated in Gaobeidian and Xiaohongmen Sewage Treatment Plant.

    In addition, the sewage treatment plant construction lagged behind urban development. Some of the self-built sewage treatment facilities operating funds, equipment aging, can not be normal operation, part of the planning and construction of the sewage collection pipe network by demolition and other factors, the implementation of difficulties, some areas there are broken pipe, no head pipe, Collection of blind spots, dead ends.

    At the same time, "should be the sewage treatment and utilization of water resources and air pollution prevention and control placed in the same important height." Beijing National People's Congress Committee recommended that 2015 should first identify 80-1000000 tons of straight row of sewage distribution, sources and production Reasons, the establishment of detailed ledger, by-mouth development of governance plans to start the sewage pipe network is not access network project. In accordance with the actual scale of urban development and population growth, the preparation of a complete and appropriate ahead of the city drainage system planning and scientific construction of sewage treatment facilities planning, development and implementation time.

    In addition, many experts suggest that the current water price increase in the proportion of sewage treatment fees, and water prices simultaneously to take the ladder charge. Timely adjustment of water price standards, so that the sewage treatment fee gradually increased to competitive price levels.

Should meet Class B criteria

    In this connection, the Beijing Municipal Quality Supervision Bureau on December 5 announced that Beijing local standards, "urban sewage treatment energy consumption limits" will be implemented in March 1, 2015, so that more reasonable sewage treatment can play a role in energy conservation. This is the first country for the sewage treatment energy consumption limits of the standard, the city's 91 sewage treatment plant energy consumption will face audit, sewage treatment to achieve a Class B standard, is expected to total energy saving of about 8%.

    Li Yan, one of the drafters of local standards for urban sewage treatment, said that Beijing Drainage Group and Beijing Drainage Association, which led the drafting of standards, had collected and analyzed 34 sewage treatment plants in Beijing and some sewage treatment plants in China. Year to 2011 this 3-year data, the average of 3 years as a limit of energy consumption limit, the optimal value as an advanced value. Also in Beijing 11 sewage treatment plant for 1 year of the standard pilot, the overall energy savings of about 8%. The new standard will be used to regulate the existing urban sewage treatment plant energy, and for the new sewage treatment plant to provide energy consumption accounting standards.

As the handling capacity of 200,000 cubic meters / day of the Qinghe Sewage Treatment Plant Phase II, has completed the energy-saving transformation, the annual total electricity reduction of 1。38 million kwh, equivalent to 55 tons of standard coal, saving electricity 1。08 million yuan。

    According to reports, the city's 91 sewage treatment plant energy consumption will be audited, and the daily processing capacity of 10,000 to 100,000 tons between the sewage plant is the focus of energy-saving targets. At the same time, in accordance with the standards, water treatment plant effluent water indicators should be consistent with a Class B standard, the equivalent of non-polluting, four water quality standards.

    According to reports, the city's 91 sewage treatment plant energy consumption will be audited, and the daily processing capacity of 10,000 to 100,000 tons between the sewage plant is the focus of energy-saving targets. At the same time, in accordance with the standards, water treatment plant effluent water indicators should be consistent with a Class B standard, the equivalent of non-polluting, four water quality standards.

Sewage treatment plants also need energy saving

    Sewage treatment plants to undertake water environmental improvement important task, but it is energy-intensive enterprises, occupying the top ten high energy-consuming industries, such a conclusion is very surprising, but more worrying is that our country has not yet aware of this problem , The construction of sewage treatment plants still follow the established model.

    Recently, Chinese Academy of Engineering, the Chinese Academy of Sciences Research Center for Eco-Environmental Research Qu Jiuhui, the Ministry of Science and China Agenda 21 Management Center, deputy director of Ke Bing, Tsinghua University, Wang Kaijun, vice president of Environmental Science, Tsinghua University Professor Yu Gang, Renmin University of China Professor Wang Hongchen, vice dean of the School of Environmental Sciences, and Yu Hanqing, a professor at the University of Science and Technology of China, called on energy experts to call for a reduction of energy consumption in exchange for water pollutants. The society should pay more attention to the problem of high energy consumption in sewage treatment plants. Standards, given the policy to guide the handling of technology upgrades, improve energy efficiency and ultimately achieve energy self-sufficiency.

    Wang Hongchen pointed out that the energy consumption of sewage treatment plants is mainly electricity consumption per cubic meter of sewage treatment power consumption 0.2-0.3 kwh, electricity costs account for about 50% -70% of the cost of sewage treatment. At present, the United States has 16,000 sewage treatment plants, electricity consumption accounts for about 3% of the total social consumption. In the city, sewage treatment power consumption often exceeds 10% of the city's electricity consumption.

    At present, China has more than 3,500 sewage treatment plants, energy consumption accounts for about 0。3% of the total electricity consumption around the country with the control of high energy-consuming industries and the rapid increase in the scale of sewage treatment, China's sewage treatment plant energy consumption Accounting for will continue to improve, will gradually close to the level of the United States。 High energy consumption on the one hand lead to increased costs of sewage treatment, exacerbated by the current energy crisis; the other hand, some small and medium sized sewage treatment plant is difficult to run, sewage treatment plant emission reduction benefits are not normal play。

    Wang Kaijun said that China's existing sewage treatment plants need to upgrade most of the standard transformation, if the standard transformation to continue to high energy consumption, high material consumption mode, the sewage treatment industry will face more unsustainable problems。

    Experts said that the traditional sewage treatment plant is currently high energy consumption, but the sewage also contains great potential. The study shows that the US sewage which implied 200 billion kwh electricity, can solve the US more than 10% of energy demand.

    Wang Kaijun said that the sewage treatment anaerobic process can effectively solve the problem of high energy consumption, but China's existing sewage treatment plants, the use of anaerobic process about 50, of which less than 30 in operation, China's sewage treatment technology And the international development trend. According to his work experience, a sewage treatment plant with a standard anaerobic digestion system, the energy self-sufficiency rate can reach 20% -30% under normal circumstances, said Wang Hongchen, a Beijing-based Drainage Group.

    Compared to other sectors of the importance of energy saving, the community's attention to the energy consumption of sewage plants is still blank。 Experts suggest that, from the policy level, to give the sewage treatment plant energy saving to appropriate incentives, at the same time, timely introduction of sewage treatment plant energy standards to guide its technology upgrades, towards the direction of energy self-sufficiency。


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