Drip Irrigation System delivers water at a slow rate directly to root systems. Drip irrigation reduces the need for pesticides. Drip irrigation systems are used with sand culture. These systems feeds each plant individually by use of spaghetti feed lines, sweat hoses or emitters. The drip irrigation system facilitates better control of crop water stress at predetermined growth stages compared with other irrigation methods. A typical drip irrigation system consists of components such as water supply source, control head, main pipe and submain pipes. A drip-irrigation system consists of emitters, lateral lines, main lines and controls. A drip irrigation system installed 15 cm below the soil surface is used to provide nitrogen and phosphorus. The design of a drip-irrigation system is based on the hydraulics of pipe flow.

Dry precipitator employs some form of mechanical impact rapping for collector deposit removal. The particles are removed from the precipitator through rapping and it is always arranged horizontally. The precipitation unit comprises baffles for distributing airflow, discharge & collection electrodes, a dust clean-out system and collection hoppers. Dry precipitators are normally fabricated from thick steel plate, insulated and lagged with aluminum. They operate at very high temperatures and maintain a fly ash in its natural dry condition simplifying material handling. A dry precipitator is installed after the burner blend chamber to remove the fly ash. This arrangement produces cleaner veneer and eliminates dryer vent emissions. They are used for wood fired boiler emissions in wood industry.

Dust containment systems are mounted on the truck and consist of a dust collector. The dust collector is powered by motors that are calibrated to pull all dust. A 2 inch hose connects the sander, edger and buffer to the vacuum system. It is used for screening, abrading & edging wood floors and the sanding dust problem are eliminated. It is an integrated system designed for controlling the dust during the sanding process. Each piece of equipment within the system plays an integral part in the total dust containment procedure.

Dust cyclones are the best way to clean the air that transports materials within a cotton gin before it is released to the atmosphere. Operating cyclones at the proper entrance velocity is important to maximize its dust collection efficiency and because fan motors pushing air through cyclones consume a significant portion of the energy used by a modern cotton gin.

Dust Extraction Systems are specially designed to extract and filter hazardous dust particles. In metal working and engineering, these systems are used extensively to remove grinding dust, linishing dust, oil mist, profile cutting, shot blast dust and machine dust.

Ecological risk assessment is a process whereby toxicity (effects data) and exposure estimates (environmental concentrations) are evaluated for the likelihood that the intended use of a pesticide will adversely affect terrestrial and aquatic wildlife, plants, and other organisms. Data required to conduct an ecological risk assessment include toxicity to wildlife, aquatic organisms, plants, & non-target insects, environmental fate, environmental transport, estimated environmental concentrations and climatologic, meterologic, & soil information.

Effluent treatment plants are treatment plants, where industrial effluents and waste waters are treated .It mainly involves removal of acrylic polymers using a dissolved air floation and removal of acrylic monomers using aerobic degradation. Preliminary treatment is done to remove large debris and grit. The primary effluent is cloudy and gray. It mainly consists of phosphorus and ammonia. The primary effluent is sprayed over the hungry bugs dissolved food and chemicals. However these bugs cannot be removed. The other chemicals that can be removed are EDTA, resin, fatty acids, and chloroform. The tertiary treatment plants include nitrogen removal system using bacterial nitrification, air stripping or ion exchange. The treated sewage water can be used for agricultural purpose. The gases emitted during the process are used in industries.