Occurrence and transformations of carbon, nitrogen, and phosphorus related to particle size fraction of sweet potato starch wastewater during hydrolytic acidification processes
| Autor: | Chao Han, Hu Yue, Xianchuan Xie, Dongyang Wei, Long Qin, Zhu Haixiao, Zibin Hai, Aimin Li |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Starch Food Handling Nitrogen Health Toxicology and Mutagenesis chemistry.chemical_element Industrial Waste 010501 environmental sciences Wastewater 01 natural sciences Waste Disposal Fluid Industrial waste chemistry.chemical_compound 010608 biotechnology Environmental Chemistry Ipomoea batatas Particle Size Potato starch 0105 earth and related environmental sciences Chemistry Phosphorus Hydrolysis Chemical oxygen demand General Medicine Pollution Carbon Agronomy Environmental chemistry Particle size Water Pollutants Chemical |
| Zdroj: | Environmental science and pollution research international. 24(25) |
| ISSN: | 1614-7499 |
| Popis: | Sweet potato starch wastewater (SPSW) is an industrial food-processing waste product, which is a significant pollution source due to its high chemical oxygen demand (COD), nitrogen, and phosphorus loads. The influence of hydrolytic acidification (HA) process on C, N, and P as well as other main parameters were evaluated. It is essential to treat these wastewaters with effective methods such as HA, a general pretreatment application. In this study, we investigate the scientific link between the changes of different fractions of C, N, and P with particle size distribution in response to the newly introduced HA process. Results showed that the levels of COD, TN, and TP remained ultimately stable; pH and suspended solids (SSs) decreased obviously. HA process exhibits excellent capability of reducing the larger particulars (with diameter of5 μm) into smaller ones (with diameter of0.1 μm). The most significant initial concentration contribution to COD, TN, and TP pollution came from particles and matter with a diameter of5 μm, at 41.8, 57.3, and 43.5%, respectively. While the most significant contribution to COD, TN, and TP was resulting from micro-molecular size particles (0.1 μm) after 48 h. The smallest particles (0.1 μm) were the most dominant contribution to all pollutants measured, with COD, TN, and TP contributions of 63.2, 50.4, and 59.3%, respectively. While the contribution of larger particles (particle size5 μm) reduced to 10.2, 15.3, and 7.1%, respectively. |
| Databáze: | OpenAIRE |
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