一、概况 我国西北某市城市污水经总干管汇集到北郊 A 河排放，因污染严重，现拟在排放口 附近一块东西向长 800 米、南北向长 1000 米的矩形规划用地上建设特大型城市污水 处理厂，设计污水处理规模为 100 万吨/天，总变化系数 K 总为 1.2，时变化系数 K 时 为 1.1

噪声:对人而言不需要的声音。 需要与否是由主观评价确定的,不但取决于声音的 物理性质而且和人类的生理、心理因素有关

Determining wastewater flowrates and constituent mass loadings is a fundamental step in initiating the conceptual process design of wastewater treatment facilities. Reliable data for existing and projected flowrates affect the hydraulic characteristics, sizing, and operational considerations of the treatment system components. Constituent mass loading, the product of constituent concentration and flowrate

Solid wastes comprise all the wastes arising from human and animal activities that are normally solid and that are discarded as useless or unwanted. The term solid waste as used in this text is all-inclusive, encompassing the heterogeneous mass of throwaways from the urban community as well as the more homogeneous accumulation of agricultural, industrial, and mineral wastes. This book is focused on the urban setting, where the accumulation of solid wastes is a direct consequence of life

Operations used for the treatment of wastewater in which change is brought about by means of or through the application of physical forces are known as physical unit operations. Because physical unit operations were derived originally from observations of the physical world. they were the first treatment methods to be used. Today, physical unit operations, as shown on Fig. 5-1, are a major part of most wastewater

The constituents of concern found in wastewater are removed by physical, chemical, and biological methods. The individual methods usually are classified as physical unit operations, chemical unit processes, and biological unit ds in which the application of physical forces ohysical unit operations include pr T3clarifiers

An understanding of the nature of wastewater is essential in the design and operation of collection, treatment, and reuse facilities, and in the engineering management of environmental quality. To promote this understanding, the information in this chapter is presented in eight sections dealing with (1)an introduction to the constituents found in wastewater, (2)sampling and analytical procedures, (3) physical characteristics, (4)inorganic nonmetallic constituents, (5) metallic constituents

一、工程学及其与基础科学的关系 人类的一切科学活动不外乎有两个目的:一是认识自然,一是适应自然、保护自然 和改造自然。前者对应着自然科学中的基础科学,也称为理学,后者则对应着自然科学 中的工程技术科学,也称为工程学或工学:工程学和基础科学之间的这种目的的差异是 它们相互区别的根本所在,也反应了这二大学科的变质所在 现在,我们可以更具体地描述工程学了

环境是指影响人类生存发展的各种天然的和 经过人工改造的自然因素的总体。天然因素有阳 光、水、大气、海洋、矿藏、森林、草原、野生 生物等;自然因素有自然遗迹、自然保护区、风 景名胜区、城市和乡村等。环境是人类赖以生存 和发展的基础。人类从自然界不断取得资源的同 时,对环境造成了特别大的污染

《环境学概论》教学大纲 《环境化学》教学大纲 《水文与水资源学》教学大纲 《环境监测》教学大纲 《环境影响评价》教学大纲 水污染控制工程教学大纲 《固体废物处理工程》教学大纲 《环境规划与管理》教学大纲 《自然灾害学》教学大纲