天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

基于DEA-Tobit模型的中國縣域污水處理服務減排效率測評

發(fā)布時間:2018-06-08 05:11

  本文選題:縣域 + 污水處理服務; 參考:《資源科學》2017年03期


【摘要】:縣域污水處理服務快速增長,已成為重要的減排力量,但減排效率差異很大。為了提高縣域污水處理服務的減排效率,本文應用數據包絡分析法,以年處理能力、年運營費用、年耗電量、雇員人數為投入變量,以污水實際處理量、COD、BOD5、氨氮消減量為產出變量,構建縣域污水處理服務減排效率評價模型,以2014年中國413個縣域污水處理設施進行實證分析,并應用Tobit模型分析找出關鍵影響因素。結果表明:①全國縣域污水處理服務減排綜合效率平均值為0.637,具有較大的效率提升空間;技術效率為0.756,要素配比急需改善;規(guī)模效率為0.835,且73.85%的縣域處于規(guī)模報酬遞增階段,有必要擴大處理規(guī)模;②污水處理服務減排效率的區(qū)域差異明顯,特征各異;③處理規(guī)模、水量負荷率、運營年限、人口密度、經濟發(fā)展水平對減排效率產生正向影響;④生物膜類工藝減排效率相對較高。因此,根據區(qū)域特征分類指導,加強縣域污水處理服務運營管理交流,適當擴大處理規(guī)模,因地制宜選擇污水處理工藝,加強配套管網建設,促進雨污分流,有利于提高污水處理服務的減排效率。
[Abstract]:The rapid growth of county sewage treatment service has become an important power of emission reduction, but the efficiency of emission reduction is very different. In order to improve the emission reduction efficiency of the county sewage treatment service, this paper applies the data envelopment analysis method, taking the annual treatment capacity, the annual operating cost, the annual electricity consumption and the number of employees as input variables. Based on the actual sewage treatment capacity CODBOD5 and ammonia nitrogen abatement as output variables, a model for evaluating the emission reduction efficiency of sewage treatment services at the county level was constructed, and an empirical analysis was carried out on 413 county sewage treatment facilities in China in 2014. Tobit model was used to find out the key factors. The results show that the average comprehensive efficiency of reducing emissions of sewage treatment services in the county area is 0.637, the technical efficiency is 0.756, the proportion of the elements is in urgent need of improvement, the scale efficiency is 0.835, and 73.85% of the counties are in the stage of increasing returns on scale. It is necessary to expand the treatment scale and the regional differences of emission reduction efficiency of sewage treatment services are obvious. Different treatment scale, water load rate, operation life, population density and economic development level have a positive impact on emission reduction efficiency. (4) Biofilm process has relatively high emission reduction efficiency. Therefore, according to the guidance of regional characteristic classification, we should strengthen the communication of operation and management of county sewage treatment service, appropriately expand the scale of treatment, select sewage treatment technology according to local conditions, strengthen the construction of supporting pipe network, and promote the diversion of rain pollution. It is beneficial to improve the efficiency of emission reduction of sewage treatment services.
【作者單位】: 福建農林大學可持續(xù)發(fā)展研究所;
【基金】:國家水體污染控制與治理科技重大專項課題(2012ZX0760003) 教育部人文社科研究項目(15YJCZH538)
【分類號】:X703

【相似文獻】

相關期刊論文 前2條

1 吉生保;席艷玲;;中國食品飲料行業(yè)經營績效評價及影響因素——基于SORM-BCC和Malmquist的DEA-Tobit模型[J];上海經濟研究;2011年09期

2 ;[J];;年期

相關碩士學位論文 前1條

1 楊牡丹;基于DEA-Tobit模型的中部地區(qū)高等教育資源配置效率研究[D];湘潭大學;2016年

,

本文編號:1994638

資料下載
論文發(fā)表

本文鏈接:http://www.sikaile.net/shengtaihuanjingbaohulunwen/1994638.html


Copyright(c)文論論文網All Rights Reserved | 網站地圖 |

版權申明:資料由用戶f9264***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com