Research on the apparatus for in-situ treatment of high quality reclaimed water in universities

Key words: 
• reclaimed water /
• treatment in situ /
• sedimentation-SOBMR-filtration /
• apparatus

Abstract: In order to increase the treating and recycling ratio of reclaimed water in universities, this paper introduced the conception of high quality wastewater treatment and recycling system, designed a high quality wastewater treatment instrument in situ, and carried out some demonstrating experiments. The result showed: sedimentation-SOBMR-filtration system can run automatically without power, which fit to treat washing and bathing wastewater especially. The COD and SS removal rates for washing wastewater are 23.8% and 55.7% in sedimentation unit, 35.8% and 27.9% in SOBMR unit respectively. Filtration unit can remove SS in washing water efficiently, and can bear the SS load strike, but the COD removal was affected by hydraulic load,the lower the load low,the high the COD removal rate. The ultimately outflow quality met the all-purpose water quality standard require for COD,SS and chroma, etc such as lavatory washing water or other usages. Each instrument can spare water resource 151.2 m3/a, and its investment returning period is about 2.01 year, which can bring great economic benefits.