本文關(guān)鍵詞：蘇州氮磷元素多部門代謝分析及回收技術(shù)應(yīng)用影響研究　出處：《清華大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 氮 磷 多部門系統(tǒng)分析 氮磷回收技術(shù) 多物質(zhì)協(xié)同

【摘要】：城市氮磷元素代謝紊亂不僅會帶來水體富營養(yǎng)化、大氣污染等各種環(huán)境問題,而且會造成氮磷資源的巨大浪費。開展城市氮磷元素代謝分析及回收技術(shù)應(yīng)用影響研究,對氮磷的污染減排和資源回收利用具有重要意義。本研究以多部門系統(tǒng)分析模型為基礎(chǔ),以蘇州為例模擬分析了城市水部門、食品部門、林業(yè)部門、能源部門、廢物管理部門的氮磷代謝流動,識別了城市氮磷元素代謝的重要部門和關(guān)鍵環(huán)節(jié),有針對性地選擇了四種氮磷回收的關(guān)鍵技術(shù),分析了不同技術(shù)及其組合方案對城市氮磷元素代謝性能的影響,綜合考慮氮磷資源回收、水和能需求變化以及生物燃料回收的協(xié)同效應(yīng),提出城市氮磷代謝綜合經(jīng)濟(jì)效益最優(yōu)的技術(shù)組合,為城市氮磷元素代謝的優(yōu)化調(diào)控提供了決策依據(jù)。以蘇州為例的分析表明:(1)氮元素從外界輸入約160.00萬噸/年,90%來自煤炭和天然氣的輸入,7%來自食品和飼料輸入。約76%的外氮輸入以NOx或N2釋放到大氣圈,主要通過燃料燃燒環(huán)節(jié)和污水處理廠脫氮環(huán)節(jié),20%主要以煤渣形式輸出城市,約1.34萬噸/年以固廢形式被填埋,約有1.45萬噸/年排入水體。氮元素的凈累積為1.66萬噸/年,集中在食品部門,占據(jù)輸入的1%。(2)磷元素從外界輸入11.80萬噸/年,以煤炭和食品部門的磷流為主。約9%的外磷輸入被填埋,77%以煤渣形式輸出城市,1%即1600噸/年排放到水體。磷元素凈累積量1.50萬噸/年,占據(jù)外磷輸入的13%。(3)畜牧業(yè)發(fā)展、居民消費和燃料需求是城市氮磷代謝的主要驅(qū)動因素;食品部門和水部門的代謝產(chǎn)物是氮磷回收的關(guān)鍵。(4)尿源分離、污泥熱解、畜糞熱解、藻類凈水四項技術(shù)是優(yōu)化城市氮磷代謝較優(yōu)的選擇。尿源分離技術(shù)和污泥熱解技術(shù)分別是對城市氮、磷代謝優(yōu)化效果最好的技術(shù)。技術(shù)組合中四項技術(shù)對氮代謝的優(yōu)化效果最好,但污泥、畜糞熱解與藻類凈水三項組合對磷代謝的優(yōu)化效果超過四技術(shù)組合。這是由于尿源分離技術(shù)減弱了污泥熱解及藻類凈水技術(shù)對氮磷的回收效果,且尿源分離技術(shù)對磷回收量的增加不能彌補污泥熱解技術(shù)對磷回收量的削減。(5)綜合考慮氮磷資源回收、水和能需求變化以及生物燃料回收的協(xié)同效應(yīng),為使綜合經(jīng)濟(jì)效益最大,建議推廣尿源分離技術(shù)、畜糞熱解及藻類凈水三項技術(shù)組合,綜合經(jīng)濟(jì)效益達(dá)14.19億元/年。
[Abstract]:Urban nitrogen and phosphorus metabolism disorder will not only bring water eutrophication, air pollution and other environmental problems. And will cause a huge waste of nitrogen and phosphorus resources. Carry out urban nitrogen and phosphorus element metabolism analysis and recovery technology application research. This study is based on the multi-sector system analysis model, taking Suzhou as an example to simulate and analyze the urban water sector, food sector, forestry sector, energy sector. The flow of nitrogen and phosphorus metabolism in waste management departments identifies the important departments and key links of nitrogen and phosphorus metabolism in cities and selects four key technologies for nitrogen and phosphorus recovery. The effects of different technologies and their combinations on the metabolic performance of urban nitrogen and phosphorus were analyzed, and the synergistic effects of nitrogen and phosphorus resource recovery, water and energy demand and biofuel recovery were considered. The optimum technical combination of comprehensive economic benefit of nitrogen and phosphorus metabolism in cities was put forward. This paper provides a decision basis for the optimal regulation of nitrogen and phosphorus metabolism in the city. The analysis of Suzhou shows that the nitrogen element is imported about 1.6 million tons per year from the outside world. 90% inputs from coal and natural gas come from 7% of food and feed imports. About 76%% of external nitrogen inputs are released into the atmosphere as NOx or N2. Mainly through the fuel combustion link and the sewage treatment plant denitrification link 20% mainly exports the city in the form of cinder, about 13,400 tons / year is landfills in the form of solid waste. About 14,500 tons / year was discharged into water. The net accumulation of nitrogen was 16,600 tons / year, concentrated in the food sector, occupying the input of 1.02) phosphorus element was imported from the outside 118,000 tons / year. About 9% of the external phosphorus input was landfill and 77% was exported to the city in the form of cinder. 1% is 1 600 tons per year, and the net accumulation of phosphorus is 15,000 tons / year, accounting for 13% of the external phosphorus input. Residents' consumption and fuel demand are the main driving factors of nitrogen and phosphorus metabolism in cities. Metabolites in food and water sectors are the key to nitrogen and phosphorus recovery. 4) Separation of urinary sources, pyrolysis of sludge and pyrolysis of animal manure. Algal water purification is the best choice to optimize the nitrogen and phosphorus metabolism in the city. The urine source separation technology and sludge pyrolysis technology are respectively for the urban nitrogen. The best technology for the optimization of phosphorus metabolism. In the technology combination, the four technologies have the best effect on nitrogen metabolism, but the sludge is the best. The optimum effect of the three combinations of animal dung pyrolysis and algae water purification on phosphorus metabolism was higher than that of four technical combinations, which was due to the reduction of nitrogen and phosphorus recovery from sludge pyrolysis and algal water purification technology by urine source separation technology. And the increase of phosphorus recovery by urine source separation technology can not compensate for the sludge pyrolysis technology to reduce phosphorus recovery. 5) Comprehensive consideration of nitrogen and phosphorus resource recovery, water and energy demand changes, as well as the synergistic effect of biofuel recovery. In order to maximize the comprehensive economic benefit, it is suggested to popularize the urinary source separation technology, the combination of animal manure pyrolysis and algal water purification, with a comprehensive economic benefit of one billion four hundred and nineteen million yuan per year.
【學(xué)位授予單位】：清華大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X505;X703

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本文編號：1379473