在全规模上使用本土膨胀剂（IBA）对脱水污泥进行补充稳定化处理并将其从B级提升至A级。
Using of indigenous bulking agents (IBAs) in complementary stabilization and enhancing of dewatered sludge class B to class a on a full scale.
作者信息
Aghili Seyed Mostafa, Mehrdadi Nasser, Aminzadeh Behnoush, Zazouli Mohammad Ali
机构信息
1School of Environment, College of Engineering, University of Tehran, Tehran, Iran.
2Department of Environmental Health Engineerig, School of Health, Medical Science University of Mazandaran, Sari, Iran.
出版信息
J Environ Health Sci Eng. 2019 Jul 18;17(2):767-777. doi: 10.1007/s40201-019-00393-8. eCollection 2019 Dec.
BACKGROUND
Different bulking agents are used in the compost of dewatered sludge (DWS). The aim of this study has been using of indigenous bulking agents (IBA) in the enhancing of the DWS class of municipal wastewater from class B to class A and complementary stabilization of it for production of green manure in Sari city, Iran.
METHODS
Three IBAs including the Saccharum Wastes (SW), Citrus Purning Wastes (CPW) and (PA) from eight IBAs were selected to be compared with the sawdust (SD) that was as a control bulking agent. Five turned windrow piles were constructed on a full scale and on base of optimal C/N equal 25.All experiments were performed on the base of the standard methods on initial mix and final compost.
RESULTS
Among five windrow piles, P5 was been the best pile with a weighting ratio of DWS to IBAs (DWS: SW: CPW: PA) equal 1: 0.2: 0.24: 0.28. Pile P1 with weighting ratio DWS: SW equal 1: 0.6, Pile P3 with weighting ratio DWS: PA equal 1: 0.84, Pile P2 with weighting ratio DWS: CPW equal 1: 0.73 and Pile P4 with weighting ratio DWS: SD equal 1: 0.57 were placed in the next rounds. The results showed that the class of DWS enhanced to Class A for about 80 to 97 days and complementary stabilization of DWS by IBAs was done well and produced green manure in term of organic matter, potassium, germination index, PH, C/N and electrical conductivity had reached to the Grade 1 of Iran's manure 10716 standard and in term of phosphorus and moisture had reached to the Grade 2 of this standard. Also heavy metals were below the maximum permissible of standards.
CONCLUSION
Using of IBAs, had a higher efficiency than the control bulking agent (sawdust) in enhancing sludge class and its stabilization, so that using of them in combination (mix of IBA) had the highest efficiency and respectively, Saccharum Wastes (SW), (PA), Citrus pruning wastes (CPW) were placed in the next round, and sawdust was placed after them. By adding suitable IBA with an optimal ratio in turned windrow method, the class of DWS of sari WWTP enhanced to Class A and complementary stabilization of DWS has been well done and the produced green manure has been reached to agricultural standards and can be safely used in agriculture.
背景
脱水污泥（DWS）堆肥中使用了不同的膨松剂。本研究的目的是在伊朗萨里市使用本地膨松剂（IBA）将城市污水的DWS等级从B级提高到A级，并对其进行补充稳定化处理以生产绿肥。
方法
从八种IBA中选择了三种IBA，包括甘蔗渣（SW）、柑橘修剪废弃物（CPW）和（PA），与作为对照膨松剂的锯末（SD）进行比较。在全规模下，基于最佳碳氮比为25构建了五个翻抛式条垛堆。所有实验均按照初始混合物和最终堆肥的标准方法进行。
结果
在五个条垛堆中，P5是最佳堆，DWS与IBA的重量比（DWS:SW:CPW:PA）为1:0.2:0.24:0.28。重量比为DWS:SW等于1:0.6的P1堆、重量比为DWS:PA等于1:0.84的P3堆、重量比为DWS:CPW等于1:0.73的P2堆以及重量比为DWS:SD等于1:0.57的P4堆排在其次。结果表明，DWS等级在约80至97天内提高到了A级，IBA对DWS的补充稳定化效果良好，所生产的绿肥在有机质、钾、发芽指数、pH值、碳氮比和电导率方面达到了伊朗肥料10716标准的1级，在磷和水分方面达到了该标准的2级。此外，重金属含量低于标准的最大允许值。
结论
在提高污泥等级及其稳定化方面，使用IBA比对照膨松剂（锯末）具有更高的效率，因此将它们组合使用（IBA混合物）效率最高，其次是甘蔗渣（SW）、（PA）、柑橘修剪废弃物（CPW），锯末排在它们之后。通过在翻抛式条垛法中以最佳比例添加合适的IBA，萨里污水处理厂DWS的等级提高到了A级，DWS的补充稳定化效果良好，所生产的绿肥达到了农业标准，可以安全地用于农业。
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