NOVELTY - Eco-panel(EP), eco-box(EB), eco-bioreactor (EBR) and composite bioreactor (CBR) includes an eco-bioreactor, an ozone bioreactor (OBR), a membrane bioreactor (MBR), an eco-ozone bioreactor (EOBR), an eco-membrane bioreactor (EMBR), an ozone membrane bioreactor (OMBR), and an eco-ozone membrane bioreactor (EOMBR) are formed by using eco-panel or eco-box or ozone or membrane. The eco-ozone bioreactor, eco-membrane bioreactor, ozone-membrane bioreactor, eco-ozone membrane bioreactor are included in composite bioreactor.    USE - Eco-panel (EP), eco-box (EB), eco-bioreactor (EBR) and composite bioreactor (CBR) for purifying water particularly subsurface water, bank-filtered water, deep sea water, contaminated underground water, underground drain water, drain water, construction site drain water, acidic drainage, polluted effluent, mine drainage, waste leachate, river water, effluent, sewage, heavy water (claimed).    ADVANTAGE - The eco-panel (EP), eco-box (EB), eco-bioreactor (EBR) and composite bioreactor (CBR) enables to purify water, which is collected from multiple source at all-weather.    DETAILED DESCRIPTION - Eco-panel(EP), eco-box(EB), eco-bioreactor (EBR) and composite bioreactor (CBR) includes an eco-bioreactor, an ozone bioreactor (OBR), a membrane bioreactor (MBR), an eco-ozone bioreactor (EOBR), an eco-membrane bioreactor (EMBR), an ozone membrane bioreactor (OMBR), and an eco-ozone membrane bioreactor (EOMBR) are formed by using eco-panel or eco-box or ozone or membrane. The eco-ozone bioreactor, eco-membrane bioreactor, ozone-membrane bioreactor, eco-ozone membrane bioreactor are included in composite bioreactor. The eco-bioreactor included as an eco-bioreactor. An eco-panel and eco-box is included in the eco-bioreactor. Ozone is included in the ozone bioreactor. Membrane is included in the membrane bioreactor. An eco-panel, membrane, eco-box and ozone are included in the eco-ozone bioreactor. Ozone and membrane are included in the ozone-membrane bioreactor. An eco-panel, eco-box, ozone and membrane are included in the eco-ozone membrane bioreactor.