• Sludge fermentation liquid addition resulted in a high NAR of 97.4%.• Extra NH4+-N from SFL was removed by anammox in anoxic phase.• Nitrogen removal efficiency of 92.51% was achieved in municipal wastewater.• The novel system could efficiently treat low COD/N municipal wastewater. Biological nitrogen removal of wastewater with low COD/N ratio could be enhanced by the addition of wasted sludge fermentation liquid (SFL), but the performance is usually limited by the introducing ammonium. In this study, the process of using SFL was successfully improved by involving anammox process. Real municipal wastewater with a low C/N ratio of 2.8–3.4 was treated in a sequencing batch reactor (SBR). The SBR was operated under anaerobic-aerobic-anoxic (AOA) mode and excess SFL was added into the anoxic phase. Stable short-cut nitrification was achieved after 46d and then anammox sludge was inoculated. In the stable period, effluent total inorganic nitrogen (TIN) was less than 4.3 mg/L with removal efficiency of 92.3%. Further analysis suggests that anammox bacteria, mainly affiliated with Candidatus_Kuenenia, successfully reduced the external ammonia from the SFL and contributed approximately 28%–43% to TIN removal. Overall, this study suggests anammox could be combined with SFL addition, resulting in a stable enhanced nitrogen biological removal. 相似文献
Journal of Polymers and the Environment - Biobased poly(1,3-propylene 2,5-furandicarboxylate) (PPF) and carbon nanotubes (CNTs) nanocomposites were prepared by a solution and coagulation method at... 相似文献
Human societies develop rapidly through the advancement of technology; however, with these advancements, many problems are emerging. The topic chosen for this study surrounds the e-waste, which has become a major problem around the world. Second-hand and unused mobile phones are a big part of globally generated e-waste. If these devices are properly recycled, they can generate substantial economic and resource value. Yet if they are indiscriminately discarded, they cause a profound environmental impact. Given the current low recovery rate of mobile phones, an increase in recovery rates becomes critical in lessening economic and environmental impacts. Based on the status quo of second-hand mobile phone recycling processes in China, this article analyzes the behavior of individuals and recyclers through a comprehensive static information game theory and finds ways to increase the recycling rate of second-hand mobile phones. The study helps the customers, to clearly identify the recycle price. In case of market, the government policy can be introduced with a reward and punishment mechanism. Furthermore, under the ideological guidance of game theory, this paper also establishes a corresponding price model of second-hand mobile phone recycling based on best response dynamics like search, variable neighborhood search, and hybrid meta-heuristic method. This model shows that the recovery time differences have a significant impact on the recovery price. Moreover, to an extent, this model can promote the possibility and initiative of customers choosing cell phone recycling.
Environmental Science and Pollution Research - The occurrence, spatial distribution, and source analysis of antibiotics in global coastal waters and estuaries are not well documented or understood.... 相似文献
Environment, Development and Sustainability - Exploring interaction of Beautiful China and SciTech Innovation is an important way to realize economic transformation and sustainable development in... 相似文献
Environmental Science and Pollution Research - The large amounts ofheavy metal from landscape wastewater have become serious problems of environmental pollution and risks for human health. The... 相似文献
Journal of Polymers and the Environment - The nonisothermal melt crystallization behavior of fully biodegradable poly(ethylene succinate)/cellulose nanocrystals (PES/CNC) composites with low... 相似文献
