6PAN S C, LIN C C, TSENG D H. Reusing sewage sludge ash as adsorbent for copper removal from wastewater [ J I - Resources, Conservation and Recycling, 2003 ( 39 ) : 79-90.
7SHEN L, ZHANG D K.Low-temperature pyrolysis of sewage sludge and I?utrescible garbage for fuel oil production [ J ] .Fuel,2005 (84) :809-815.
9Khursheed A,Kazmi A A. Retrospective of ecological ap-proaches to excess sludge reduction[J].{H}Water Research,2011,(15):4287.
10Houghton J I,Stephenson T. Effect of influent organic content on digested sludge extracellular polymer content and dewaterability[J].{H}Water Research,2002,(14):3620.