城市污水處理廠污泥熱值及影響因素分析-wenkub
2023-01-30 02:24:51 本頁(yè)面
【正文】 ffected sludge heat value was investigated , and t hen the influence of moist ure on sludge heat value utili2 zation was also discussed. The experiment showed t hat t he result s of element analysi s and calorimeter are accordant . The sl udge volatile content examination was infl uenced by t he wastewater qualit y , drainage system , wastewater t reating process and sl udge feat ure , and t hen effected t he sl udge heat val ue. It was suggested t hat t he sludge ing f rom wastewater t reat ment plant s of bined drainage system and digested sl udge were not fit for bustion. St udy result s f urt her indicated t hat when t he sewage sl udge could be incinerated by it self , t he moi st ure should not be higher t han 68 %. From t he analyses of sl udge element , we find t hat alt hough t he sl udge volatile content of each plant are different , but t he stoichiomet ric form of element i s basically consi stent , we can roughly denote t he stoichiomet ric formula of sewage sludge volatile content CH1. 72 O0. 55 N0. 12 S0. 03 . Keywor ds: WWTPs 。Volatile content 。目前,國(guó)內(nèi)外常見(jiàn)的污泥處置方法有填埋、土地 38 給水排水 Vol134 No14 2008 利用、焚燒及綜合利用等 [ 3～6 ] 。進(jìn)一步分析了污水水質(zhì)、排水體制、污水及污泥處理工藝對(duì)污泥熱值的影響,以及水分對(duì)污泥潛熱利用的影響。用 I KA C5000 控制型量熱儀(德國(guó)) 測(cè)定污泥的熱值。表1 試驗(yàn)污水處理廠基本情況污水處理廠名稱排水體制進(jìn)水水質(zhì)/ mg/ L CODCr SS 污水處理工藝污泥處理工藝污泥性質(zhì)唐家橋 分流制 335 200 普通活性污泥法濃縮 消化 脫水消化污泥城南 分流制 474 170 生物濾池 曝氣濃縮 脫水 自然干化混合污泥北碚 分流制 266 135 厭氧 Corrousel 氧化溝濃縮脫水一體化混合污泥唐家沱 合流制 255 175 A 2 / O 濃縮 脫水混合污泥巴南 合流制 300 180 Orbal 氧化溝濃縮脫水一體化混合污泥 2 污泥熱值測(cè)定結(jié)果及分析 2. 1 量熱儀測(cè)定結(jié)果將105 ℃烘干的污泥樣品粉碎成粒徑為2 mm 左右碎粒,稱取0. 6 g 左右,利用I KA C5000 控制型量熱儀直接測(cè)定污泥的高位發(fā)熱量(每個(gè)樣品測(cè) 3 次,取平均值) ,然后根據(jù)污泥的揮發(fā)分含量,計(jì)算污泥無(wú)灰基高位發(fā)熱量,結(jié)果見(jiàn)表2。 PV ——
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