[Full-scale experiments of municipal sewage treated by symbiotic system consisting of tubifex and microbes].
A symbiotic system consisting of tubifex and microbe was formed when tubifex was incubated in the biological contact oxidation process,the tubifex attached to the outer layer of the carriers. When the density of tubifex was about 31.3 g/L, a recycling food chain between corpse of tubifex and excrement and wastewater and microbe and sludge was formed and it could reach balance. The large scale control experimental system for treating 20,000 m3 x d(-1) municipal sewage was carried out for a long time. The result showed that tubifex could improve water quality in the effluent. When the concentration in the influent of COD,NH4+ -N,TP and SS were 130-459, 14.21-27.46, 1.60-6.93, 60-466 mg x L(-1), respectively,the removal rates of COD and SS can be improved by 8.7% and 13.6%. However, tubifex can also increase the concentration of NH4+ -N in the system,but a proper operation can make the effluent concentration of NH4+ -N below 5 mg x L(-1) stably. The symbiotic system consisting of tubifex and microbe has very good phosphorus removal efficiency. The reactor has a high toleration to loading shock and it could keep the effluent quality stable.
Lou
Ju-qing
JQ
College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangshou 310012, China. ljq7393@163.com
Guo
Mao-xin
MX
Sun
Pei-de
PD
Wu
Ge
G
Song
Ying-qi
YQ
D000818:Animals; D001419:Bacteria / Q000378:metabolism*; D018407:Bacterial Physiological Phenomena; D001673:Biodegradation, Environmental; D002947:Cities; D009835:Oligochaeta / Q000378:metabolism / Q000502:physiology*; D012722:Sewage / Q000737:chemistry*; D013559:Symbiosis / Q000502:physiology*; D014865:Waste Disposal, Fluid / Q000379:methods*
D012722:Sewage