Discussion on the Combined Domestic Wastewater Treatment Installation

This paper sums up and analyzes the combined domestic wastewater treatment installation. The significance of existence and the effect of its treatment were affirmed. Some problems at present were pointed out. Suggestions on its research, manufacture and operation as well as its standardization and serialization are presented.     

Discussion on Some Problems Concerning the Building Hot Water Supply System

The problems concerning the patterns of hot water supply and heating equipment, hot water storage equipment volume, water quality and pipe material were studied in this paper. Then, on this basis, the solution for optimizing building hot water supply system was proposed.     

Discussion on Disadvantages of the Current Water Supply Firing System Based on the Individual Building

By analyzing the problems and their reasons existed in the water firing prevention system, it is pointed out that the current Chinese firing prevention system is a partial and half-baked one, based solely on the individual building. Fire is an accident to a building, while it is a necessity to a city. Fire fighting is not only the responsibility of individual buildings, but also a part of disaster prevention system. The specialized management, power of fire fighting and salvation of the city nowadays should be reinforced. The responsibility of firing prevention system in a building is to put off the initial flame and prevent the fire extending within the right time, meanwhile to start the fire prevention and contingency measurements of the city.     

Discussion on Interactive Method for CAD Drawing andCalculation in Building Water Supply and Drainage Design

According to the features of CAD for building water supply and drainage design,the interactive method for CAD calculation and drawing in building water supply and drainage engineering are discussed . A practical example of ADS for hydraulic calculation has been given in this paper .