CAJ | 학술논문

为提高污泥的破解效率，采用超声-冻融联合技术破解南昌市某污水处理厂二沉层污泥，选择声能密度、超声时间、冷冻时间、冷冻温度等4个因素为试验参数，设计3因素4水平和1因素2水平（34×12）的混合正交试验，分析在不同处理条件下污泥的理化性质。结果表明：超声和冻融不仅可促进污泥中可溶性化学需氧量、总氮和总磷的释放，还能有效降低污泥重金属含量，且超声的作用效果优于冻融。在最佳试验条件下污泥向上清液释放的 SCOD、TN 和 TP 分别是原来的5．70、5．34和1．94倍，污泥重金属权重离子冲量ωI 降至原来的88％。
위제고오니적파해효솔，채용초성-동융연합기술파해남창시모오수처리엄이침층오니，선택성능밀도、초성시간、냉동시간、냉동온도등4개인소위시험삼수，설계3인소4수평화1인소2수평（34×12）적혼합정교시험，분석재불동처리조건하오니적이화성질。결과표명：초성화동융불부가촉진오니중가용성화학수양량、총담화총린적석방，환능유효강저오니중금속함량，차초성적작용효과우우동융。재최가시험조건하오니향상청액석방적 SCOD、TN 화 TP 분별시원래적5．70、5．34화1．94배，오니중금속권중리자충량ωI 강지원래적88％。
To enhance the cracking efficiency of sewage sludge,ultrasonic and freeze-thawing technologies were applied in sewage sludge sampled from secondary sedimentation tank of typical municipal sewage treatment plants in Nanchang.After taking ultrasonic density,ultrasonic time,freezing time and freezing temperature as factors,a three-factor two-level and one-factor two-level combined orthogonal experiment was designed to analyze the change of physicochemical properties of test sludge.Results:All control factors could not only promote the release of SCOD (soluble chemical oxygen demand),TN (total nitrogen)and TP (total phosphorus), but also reduce the content of heavy metals in the sludge. Moreover,the effect of ultrasonication was better than freeze-thawing. SCOD, TN and TP in the supernate were 5.70,5.34 and 1.94 times as much as the control respectively,and ωI (weight ion impulse)of heavy metal in the sludge reduced to 88% of control.