近年来,随着我国城市化进程的加快和国家确定的各水资源保护规划工程 的陆续启动,全国城镇污水处理设施的建设速度随之加快,城镇污水处理率逐 年提高,污水污泥的产生量相应地不断增加,污泥的处理处置问题日益显现出 来目前我国城市污水处理厂的大部污泥分还未经稳定化!无害化!资源化的 处理和处置,不但成为城市及污水处理厂的负担,而且污泥的任意排放和堆放 对周边环境造成新的污泥已经触目惊心经多方面因素的综合考虑,认为污泥 处置最为经济有效的方式就是生物资源循环利用,即污泥资源利用处置为了 解决这一问题,在此提出污泥堆肥的资源化利用方案,将污泥的处理!处置! 污泥肥料的出路连为一体,真正实现了污泥处理处置一体化与生物资源的循环 利用,较好地实现了社会效益!经济效益与环境效益的统一 可行性研究是项目投资决策的依据,项目开发前期研究论证工作的质量好 坏,直接决定了项目今后的成功与否本文以城市污水处理厂的污泥为研究对 象,严格按照可行性研究的基本原则,着重从污泥堆肥资源化利用产业发展分 析着手首先分析了目前国内外污水处理厂污泥的处理处置现状以及其中存在 的问题,通过这些现状反映了该项目研究的背景情况;然后从污泥本身的属性 出发分析污水处理厂污泥进行堆肥的资源化利用的可行性,其中主要分析了目 前我国大多数污水厂污泥的有机成分!氮!磷!钾及重金属等有毒有害物质的 含量,基本符合我国污泥农用标准,并且该有机肥料也具有较高阔的市场空间, 从宏观方面论述了选择污泥堆肥资源化利用的路线在我国是可行的;其次,以 朝阳污水厂的污泥为案列,从技术和经济两方面分析了污泥堆肥资源化利用的 可行性;最后,对该项目进行了总体评价,同时,对污泥堆肥的前景进行了展 望,最后得出了可行性研究的结论 关键词:污泥;堆肥;资源化利用;可行性研究 厂 互西南交通大学硕士研究生学位报告第日页 Abstraet Inreeentyears,astheurbanizationandtheProtectionofWaterresources PlanningProjeetsarestartedoneafteranother,urbansewagetreatmentfaeilitiesare sPeeduPthePaeethen,andsewagetreatmentrate15increasingovertheyears.The amountofsewagesludge15obviouslyinereasing,therefore,thetreatmentand disPosalofthesewagesludge15inereasingaPParent.Theurbansewagetreatment Plants,mostofthesludgehasnotbeenatastable,soundandresourcesofthe treatmentanddisPosal,andnotonlybeeometheurbansewagetreatmentPlant burden,andtheuncontrolleddischargeofsludgeandPiletosurrounding environmenthasbeenstartling.Themostcost一effeetivedisPosalofsludgeinthe form15biologicalresourcesreeycling,ordisPosalofsludgeusedofresourcesafter manyfactorstoconsider.ThesludgecomPostinguseoftheresourcesofthe Program15ProPosedtosolvethisProblem.AndthesludgetreatmentanddisPosal, sewagesludgefertilizeraretogethertoaehieveiniegrationofthesludgetreatment anddisPosalandrecyclingofbiologicalresourees.Theniteanachievethesocial, economicandenvironmentalbenefitsofunifieation. 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KeyWordS:SludgeComPostingResourceUtilizationFeasibilityStudy 饰西南交通大学硕士研究生学位报告第lV页 目录 第1章绪论.................................................................................................1 1.1问题的提出..............................................................................................1 1.2研究的目的和意义..................................................................................1 1.3国内外污水厂污泥处理处置现状..........................................................3 1.3.1国外污水厂污泥处理处置现状......................................................3 1.3.2国内污水厂污泥处理处置现状......................................................6 1.4本报告的主要内容及结构安排..............................................................8 第2章项目可行性分析相关理论概述.........................................................9 2.1项目可行性论证理论概述......................................................................9 2.1.1项目可行性论证的内容及阶段......................................................9 2.1.2项目主要的风险与对策.................................................................11 2.2污泥堆肥的理论基础............................................................................12 2.2.1污泥的产生及分类........................................................................12 2.2.2污泥的成分....................................................................................13 2.2.3污泥堆肥的生物学原理................................................................巧 第3章污水厂污泥堆肥资源化利用项目介绍...........................................17 3.1项目介绍及处理工艺............................................................................17 3.1.1项目介绍........................................................................................17 3.1.2朝阳污水厂处理工艺简介............................................................17 3.2污泥终置处理方案的选择....................................................................18 3.2.1常见的几种污泥处置....................................................................18 3.2.2污泥终置处理资源化利用方案的选择........................................21 3.3污泥堆肥的可行性................................................................................22 3.3.1符合排放标准要求........................................................................22 3.3.2污泥养分可利用............................................................................23 3.3.3成熟工艺!经济有效....................................................................24 3.3.4产品安全有广阔市场....................................................................24 督西南交通大学硕士研究生学位报告第V页 第4章污水厂污泥堆肥资源化利用项目技术分析...................................26 4.1污泥堆肥过程........................................................................................26 4.2污泥堆肥工艺简述及工艺选择............................................................27 4.2.1污泥堆肥工艺简述........................................................................27 4.2.2污泥堆肥工艺选择........................................................................29 4.3好氧堆肥控制参数................................................................................30 第5章污水厂污泥堆肥资源化利用项目经济分析...................................33 5.1投资估算................................................................................................33 5.2资金筹措................................................................................................33 5.3成本估算................................................................................................34 5.4技术经济评价.:................................................................................34 5.4.1利润分析........................................................................................34 5.4.2盈亏平衡分析................................................................................35 5.5环境效益................................................................................................35 5.6社会效益.........