Sewage is a kind of ideal low-temperature heat sources. Sewage heat source pump system uses heat energy in sewage, and it is a method of utilizing sewage resources. In this article we analyze sewage’s characteristics and sewage source heat pump system; introduce its practical applications in sewage treatment plants in China, analyze its technical and economic characteristics, and discuss its ap...

Incumbent malfeasance is a major challenge in many developing democracies. Our model suggests that electoral accountability requires a media market structure incentivizing local media to report incumbent malfeasance. We test the model’s implications in Mexico, leveraging plausibly exogenous variation in the pre-election release of municipal audits revealing misallocated spending and greater acc...

Industries produce millions of cubic meters of effluent every year and the wastewater produced may be released into the surrounding water bodies, treated on-site or at municipal treatment plants. The determination of organic matter in the wastewater generated is very important to avoid any negative effect on the aquatic ecosystem. The scope of the present work is to assess the physicochemical c...

one of the most important sources of imamiyyah jurisprudence is the tradition in the form of reliable report. and a significant part of it, refers to external threads, but the renowned osuli's jurisprudents take the view that the scope of the reliable authority credit, is limited to injunctions and argue that account is a subject concerning with evidence chapter in which justice and witnes...