Recent advances in the sucroenergy production chain include a new way of planting sugarcane based on a method of seedling propagation which requires a significant amount of substrate. Since the sucroenergy sector has been noted as having cleaner energy production, it is imperative that sustainable substrates suitable for the production of sugarcane seedlings be developed. Therefore, the main objective of this study was to develop innovative substrates with solar-dried sewage sludges and rice husk ash to compose substrates for sugarcane seedling production. Batches of sewage sludges were collected in open drying beds from three different municipal wastewater treatment plants from the Rio Grande do Sul State, Brazil: from Passo Fundo city (treated by anaerobic digestion), from Rio Grande city (aerobic digestion) and from Santa Maria city (aerobic digestion). Rice husk ash was obtained from a rice processing industry in the Pelotas industrial region in southern Brazil. The content of trace elements and the pathogenicity of pure sewage sludge (SS) were analyzed. The nutrient content of SS and rice husk ash (RHA) was determined. Twelve substrates with differing ratios of SS, RHA, and vermiculite were formulated to evaluate the subsequent development of sugarcane seedlings. Chemical and physical attributes were determined in all substrates and compared to a commercial substrate. The experiment was conducted in a greenhouse using mini-setts of sugarcane of the RB867515 genotype. Fifteen days after planting the seedlings were evaluated for stalk diameter, shoot height, shoot dry weight and root, and the Dickson quality index was determined. Sewage sludge showed low levels of heavy metals and pathogenic organisms and high contents of nutrients, especially nitrogen, phosphorus and micronutrients such as Zn and Cu, showing promising suitability as a substrate component for seedling production. In general, substrates of all tested proportions of SS and RHA promoted greater shoot and root dry weight and a superior Dickson Quality Index than the commercial substrate used as reference, except for the formulation containing 87.5 % SS. The viability of combining sludges from municipal wastewater treatment plants and rice husk ash into one product was confirmed using a set of biometric attributes and nutrient tissue contents obtained from the production of sugarcane seedlings.

蔗糖能源生产链的最新进展包括一种新的种植甘蔗的方法，该方法基于幼苗繁殖的方法，该方法需要大量的底物。由于蔗糖能源领域的能源生产较为清洁，因此必须开发适合生产甘蔗幼苗的可持续基质。因此，本研究的主要目的是开发具有太阳能干燥污泥和稻壳灰的创新基质，以构成用于甘蔗幼苗生产的基质。从开放式干燥床中收集了一批污水污泥，这些床来自巴西南里奥格兰德州的三个不同的市政废水处理厂：Passo Fundo市（经厌氧消化处理），来自里奥格兰德市（有氧消化）和圣玛丽亚市（有氧消化）。稻壳灰是从巴西南部Pelotas工业区的大米加工业获得的。分析了微量元素的含量和纯污泥的致病性。测定了SS和稻壳灰（RHA）的营养成分。配制十二种具有不同SS，RHA和ver石比例的基质，以评估甘蔗幼苗的后续发育。测定所有底物的化学和物理属性，并与商业底物进行比较。该实验是在温室中使用小种群RB867515基因型甘蔗进行的。播种后十五天，对幼苗的茎直径，芽高，芽干重和根进行评估，并确定了Dickson质量指数。污水污泥的重金属和致病生物含量低，养分含量高，尤其是氮，磷和微量营养元素（如锌和铜），显示出作为苗木生产基质的潜力。一般而言，所有测试比例的SS和RHA底物都比用作参考的商业底物促进更大的芽和根干重，并具有更好的Dickson质量指数，除了含有87.5％SS的配方外。使用从甘蔗幼苗生产中获得的一系列生物特征和营养组织含量，证实了将城市污水处理厂的污泥和稻壳灰混合成一种产品的可行性。污水污泥的重金属和致病生物含量低，养分含量高，尤其是氮，磷和微量营养元素（如锌和铜），显示出作为苗木生产基质的潜力。通常，除含有87.5％SS的配方外，所有测试比例的SS和RHA的基质都比用作参考的商业基质提高了更高的芽和根干重，并具有更好的Dickson质量指数。使用从甘蔗幼苗生产中获得的一系列生物特征和营养组织含量，证实了将城市污水处理厂的污泥和稻壳灰混合成一种产品的可行性。污水污泥的重金属和致病生物含量低，养分含量高，尤其是氮，磷和微量营养元素（如锌和铜），显示出作为苗木生产基质的潜力。通常，除含有87.5％SS的配方外，所有测试比例的SS和RHA的基质都比用作参考的商业基质提高了更高的芽和根干重，并具有更好的Dickson质量指数。使用从甘蔗幼苗生产中获得的一系列生物特征和营养组织含量，证实了将城市污水处理厂的污泥和稻壳灰混合成一种产品的可行性。磷和微量营养元素（如Zn和Cu），显示出有希望的适宜性作为幼苗生产的底物成分。一般而言，所有测试比例的SS和RHA底物都比用作参考的商业底物促进更大的芽和根干重，并具有更好的Dickson质量指数，除了含有87.5％SS的配方。使用从甘蔗幼苗生产中获得的一系列生物特征和营养组织含量，证实了将城市污水处理厂的污泥和稻壳灰混合成一种产品的可行性。磷和微量营养元素（如Zn和Cu），显示出有希望的适宜性作为幼苗生产的底物成分。通常，除含有87.5％SS的配方外，所有测试比例的SS和RHA的基质都比用作参考的商业基质提高了更高的芽和根干重，并具有更好的Dickson质量指数。使用从甘蔗幼苗生产中获得的一系列生物特征和营养组织含量，证实了将城市污水处理厂的污泥和稻壳灰混合成一种产品的可行性。除含有87.5％SS的配方外，所有测试比例的SS和RHA的底物都比用作参考的商业底物具有更高的枝条和根部干重，并具有更好的Dickson质量指数。使用从甘蔗幼苗生产中获得的一系列生物特征和营养组织含量，证实了将城市污水处理厂的污泥和稻壳灰混合成一种产品的可行性。除含有87.5％SS的配方外，所有测试比例的SS和RHA的底物都比用作参考的商业底物具有更高的枝条和根部干重，并具有更好的Dickson质量指数。使用从甘蔗幼苗生产中获得的一系列生物特征和营养组织含量，证实了将城市污水处理厂的污泥和稻壳灰混合成一种产品的可行性。