Department of Civil Engineering, K.S. Rangasamy College of Technology, Tiruchengode 637215, Tamilnadu, India.
Ecotoxicol Environ Saf. 2016 Dec;134(Pt 2):350-357. doi: 10.1016/j.ecoenv.2015.08.027. Epub 2015 Oct 4.
In the 21st century, people migrated from rural to urban areas for several reasons. As a result, the populations of Indian cities are increasing day by day. On one hand, the country is developing in the field of science and technology and on the other hand, it is encountering a serious problem called 'Environmental degradation'. Due to increase in population, the generation of solid waste is also increased and is being disposed in open dumps and landfills which lead to air and land pollution. This study is attempted to generate energy out of organic solid waste by the bio- fermentation process. The study was conducted for a period of 7 months at Erode, Tamilnadu and the reading on various parameters like Hydraulic retention time, organic loading rate, sludge loading rate, influent pH, effluent pH, inlet volatile acids, out let volatile fatty acids, inlet VSS/TS ratio, outlet VSS/TS ratio, influent COD, effluent COD and % of COD removal are recorded for every 10 days. The aim of the present study is to develop a model through multiple linear regression analysis with COD as dependent variable and various parameters like HRT, OLR, SLR, influent, effluent, VSS/TS ratio, influent COD, effluent COD, etc as independent variables and to analyze the impact of these parameters on COD. The results of the model developed through step-wise regression method revealed that only four parameters Influent COD, effluent COD, VSS/TS and Influent/pH were main influencers of COD removal. The parameters influent COD and VSS/TS have positive impact on COD removal and the parameters effluent COD and Influent/pH have negative impact. The parameter Influent COD has the highest order of impact, followed by effluent COD, VSS/TS and influent pH. The other parameters HRT, OLR, SLR, INLET VFA and OUTLET VFA were not significantly contributing to the removal of COD. The implementation of the process suggested through this study might bring in dual benefit to the community, viz treatment of solid waste and creation of energy.
在 21 世纪，人们出于多种原因从农村迁移到城市。因此，印度城市的人口每天都在增加。一方面，该国在科学技术领域发展，另一方面，它正面临一个严重的问题，称为“环境恶化”。由于人口增加，固体废物的产生也增加了，并被放置在露天垃圾场和垃圾填埋场中，这导致了空气和土地污染。本研究试图通过生物发酵过程从有机固体废物中产生能源。该研究在泰米尔纳德邦的埃罗德进行了 7 个月，记录了各种参数的读数，如水力停留时间、有机负荷率、污泥负荷率、进水 pH 值、出水 pH 值、进水挥发性酸、出水挥发性脂肪酸、进水 VSS/TS 比、出水 VSS/TS 比、进水 COD、出水 COD 和 COD 去除率的百分比。本研究的目的是通过多元线性回归分析建立一个模型，以 COD 为因变量，以 HRT、OLR、SLR、进水、出水、VSS/TS 比、进水 COD、出水 COD 等为自变量，并分析这些参数对 COD 的影响。通过逐步回归法建立的模型的结果表明，只有四个参数——进水 COD、出水 COD、VSS/TS 和进水 pH——是 COD 去除的主要影响因素。进水 COD 和 VSS/TS 对 COD 去除有正向影响，而出水 COD 和进水 pH 则有负向影响。参数进水 COD 的影响程度最高，其次是出水 COD、VSS/TS 和进水 pH。其他参数 HRT、OLR、SLR、INLET VFA 和 OUTLET VFA 对 COD 的去除没有显著贡献。通过本研究提出的工艺实施可能会给社区带来双重好处，即处理固体废物和创造能源。
