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Summary of research on small and medium-sized sewage treatment plants

in order to do a good job in the bidding and project contracting of sewage treatment plants, we have conducted research on some domestic sewage treatment plants

a total of 28 questionnaires were distributed and four small and medium-sized sewage treatment plants were visited. The four small and medium-sized sewage treatment plants are: Beijing Jiuxianqiao sewage treatment plant (200000 tons/day), Beijing Qinghe sewage treatment plant (200000 tons/day), Shijiazhuang Qiaoxi sewage treatment plant (160000 tons/day) and Shijiazhuang high tech Zone sewage treatment plant (100000 tons/day)

the content of the questionnaire is very comprehensive, including design, construction, operation, management and other aspects. It is difficult. In addition, some units are afraid of losing secrets and other reasons. Only eight forms are sent back, and the contents are incomplete. They are Shijiazhuang high tech Zone sewage treatment plant, Shijiazhuang Qiaoxi sewage treatment plant Nanchang Chaoyang sewage treatment plant (80000 Guangya aluminum also actively participated in the drafting and revision of international, national and industrial standards and alliance standards up to more than 40 tons/day), Shenzhen Luofang sewage treatment plant (225000 tons/day), Shenzhen Binhe Road sewage treatment plant (300000 tons/day) and Guangdong Maoming sewage treatment plant (100000 tons/day) are mainly applicable to MDI or modified MDI system sewage treatment plants with content greater than or equal to 50%

generally speaking, the early stage is dominated by the traditional process of activated sludge process, and the recent stage is dominated by oxidation ditch and CASS process; The old process covers a large area and the equipment energy consumption is high; The new process covers a small area, has a high degree of automation, less energy consumption, and relatively advanced equipment

it is suggested that in order to do a good job in bidding and improve competitiveness, key interviews should be conducted with urban sewage treatment plants that have been built and put into operation in China for 30-200 thousand tons. Because it is strong enough to eliminate the load limit/day of bridge users and adopt new treatment processes (such as LINPOR process and fluidized bed process), In order to sum up experience and lessons and do a better job. 2.2.2 peripheral circuit design ADC0809 pin functions and processing are described below: