A comprehensive strategy to treat widespread environmental degradation in an important watershed of Karnataka State. Stage I under development: Design of Natural Biological System to treat perennial Arkavathi River flow from West Bangalore, 10-15 million L/day of mixed domestic and industrial sewage (COD 300-800 mg/l). Unique elements include passive stormflow protection, continuous treatment under gravity powered conditions, integration into existing riverbanks. Additional stages to come online

Holistic watershed design, urban and rural sustainable elements for passive flood prevention, riparian erosion protection, aquifer recharge and protection, “Eco-Trail” continuous trail from the sea to the Alps. In conjunction with prestigious urban and landscape design firm WEST-8 (Rotterdam, Netherlands).

Design and establishment of robust wetland network to dramatically upgrade river quality polluted with industrial, sanitary and agricultural outflow from numerous villages in the Samaria Mountain range. System highlights- copes with wild swings in quality due to seasonal agricultural activity, functions with no external energy input.

Survey and conceptual design for the rehabilitation of the urban watershed of Hyderabad Metropolis. Includes the Kukatpally nalla (70 million L/day) at confluence of Hussain Sagar lake, Durgam Cheruvu (Secret Lake), interception and treatment of industrial sewage embedded in the urban environment with minimal changes to existing infrastructure, controls for erosion and flooding.

Holistic design of property to meet irrigation demands by treating existing wastewater flows (2-4 million L/day) via thorough redesign of the hydraulic infrastructure and implementing NBS at strategic locations on the property.

Multi-faceted air water and soil pollution rehabilitation design. Major upgrade of storm/sewage drains and banks on the grounds of a major housing development in Bangalore (2-3 million L/day) with built-in reuse infrastructure. Vegetative green wall for noise and air filtration.

Sanitary water treatment of a medium sized community (500-1000 family units), protection of local canals, Biodiesel production

Design and implementation of constructed wetlands for treating the Yarkon River (400,000 L/d), polishing of sewage effluent, removal of pathogens and metals. Highly acclaimed urban park with integrated active landscape, functions as estuary, biodiversity reservoir, cooling of the urban heat-sink, recreational/picnic destination.

Revival of a dried up riverbed as the backbone of an ecological neighborhood. Designs include integral elements for purifying treated effluents, passive storm control, upstream flood and turbulence control, interception and treatment of urban runoff.

Design of hydraulic and vegetated buffer zones to protect lake system from agricultural influent pollution.

Design and establishment of a biological sewage treatment plant (25,000 L/day) for a power plant not served by the municipal sewage plant. The system saves millions of dollars yearly in pumping, transport and operation costs, produces water of tertiary quality for irrigation and operates with minimal human involvement.

Establishment of a highly regarded phytoremediation facility for treatment of all the waste generated by the IGBC building complex, Hyderabad (to 10,000 L/day). Serves as a technology springboard for application in Indian urban and rural settings.

Design and Implementation of a greywater treatment and reuse facility for 550 residential units, embedded into the urban environment to function in addition as a beautiful and unique recreational zone including an extensive lotus pond, and “active” landscape. Meets stringent regulatory requirements for reuse in a populated urban zone.

Grey water recycling as part of a central business complex in Tel Aviv. Mixture of subsurface wetland and free-flow lotus/fish pond. Favorite site for urban joggers/lunch breakers. Forms a natural arcade with boardwalk and outlets to businesses. Relief from urban heat-sink.

Design and Establishment of facilities at gas stations throughout Israel, especially in rural/agricultural areas to intercept and treat gas station rinse water, runoff, sewage generated from restaurants/refreshment areas and rest stops toilets. The purified water contains no hydrocarbon or mineral oil residues and is used for either local irrigation or groundwater replenishment.

Design and implementation of a treatment system for cosmetics plant waste stream as well as sanitary sewage from workers and visitor’s center. Treatment of highly concentrated mineral and emulsion rich brines/sludge under intense environmental conditions at the Dead Sea.

Design and implementation of a treatment system for airplane hangar and garage runoff containing hydrocarbons and dissolved organic pollutants.

Design and implementation of a treatment system for sewage originating in a cooking oil factory and refinery containing high levels of sulfates, organic pollutants and salinity.

Design and implementation of a treatment system for rinse water from petroleum tankers containing high levels of salinity (50% seawater), heavy metals and hydrocarbons. System includes bioindicator pools, combination of hydraulic regimes and phytoremediation. Excellent removal (>90% for metals, hydrocarbons) observed over years of maintenance free operation.

Design and implementation of a treatment system to treat difficult dump truck rinse/landfill leachate water with extreme loadings and fluctuations in quality. Forms a link in the protective buffer zone protecting the sensitive confluence of Yarkon and Ayalon Rivers. Orders of magnitude (>1000%) removal of COD, BOD, TSS and E. Coli. Currently the proposed subject for a joint Israeli-German research project on the fate of pathogens and micropollutants in the subsurface zone.

Designing and establishing a unique natural system with low-maintenance demands for treatment of 1) dairy farm waste; 2) sanitary waste of the community (total 110,000 L/day). For the sake of the system, AYALA invented a completely new approach to treating the high organic pollution of the dairy farm water, including a static separation chamber amenable to operation by local labor

Designing and establishing an extensive system for an entire agricultural settlement, treatment and reuse of several wastewater streams including a fish farm (high ammonia), dairy farm and domestic sewage. After proving >90% removal of pollutants and high economic sustainability, the system attracted the attention of several research groups and is still the subject of intense investigation of plant physiology, phytoremediation and bioindicators.

Wine and olive crush carries a huge seasonal burden. AYALA designed and implemented a solution that could survive all year in a “dormant” state, purifying the sewage from a restaurant and worker’s quarters, while in high season ramps up automatically to handle the huge influx of phenols, tannins, dissolved organic matter and salts originating in the wine and olive press. The purified water, meeting stringent regulatory demands, is returned to the vineyard as irrigation.

Establishment of tailored system to receive abbatoir run-off and rinse water; treatment of all sewage produced on the farm, effluent meets regulatory requirements for environmental release and is used to recharge the groundwater. In addition, the system functions as a rain water harvester to replenish the parched desert ground.