Monthly Archives: March 2014

Validity Of BOD Test for

Validity Of BOD Test for Waste-water Released to Marine Ecosystems Submitted by T. Sunder Rami Rreedy Introduction Cities have resulted in faster growth rate, 17 coastal megacities covering about 25% of the world’s population. The availability of oxygen in the ocean is limited due to high chlorides. The biochemical degradation rates are slower in salinity… Read More »

Energy Generation from Biogas Produced at STP

Energy Generation from Biogas Produced at STP Presented By:  K M Jaiswal Excreta and wastewater sludge are resources for making biogas. Finding ways to put them to their best uses is part of developing sustainable technologies. At the same time, excreta and wastewater sludge – if not managed properly – can be dangerous to human… Read More »

Application of Zycosil soil on pavements

Application of Zycosil soil on pavements Submitted by  Ashraf K Zycosil is new generation of nanotechnology, which has been developed for waterproofing and has UV resistance, thermal resistance, and an ability to withstand the wind erosion due to its nano-size and penetrative power. Water intrusion in building materials has been a problem for the last… Read More »

Modern Technologies on Foundation Retrofitting

Foundation Retrofitting The foundation of any type of structure is the only element of a building unexposed to weather conditions. There is no reason why they have to be taken for granted as this fact makes it almost impossible for foundation repair(foundation retrofitting) to take place. And if in case they would be, it requires… Read More »

Sub Surface Irrigation | Subsurface Irrigation Working | Advantages

Introduction Sub Surface Irrigation In sub surface Irrigation , effluent is delivered directly to the infiltrative surface of the soil using specially manufactured polyethylene tubing with built-in turbulent flow emitters. Subsurface irrigation is a highly-efficient watering technique. It reduces outdoor water use by 30 to 40 percent. Design of Sub-surface Irrigation It consist a masonry chamber (Distribution box) where… Read More »

Why do we Need Soak Pit Tank ?

Why do we Need Soak Pit Tank ? The water in the septic tank is not pure, it is called grey water because it still contains organic materials that need to be filtered out.  A Soak Pit is a covered, porous-walled chamber that allows water to slowly soak into the ground. Pre-settled effluent from septic… Read More »

Odor Treatment Methods & Design Considerations

Odor Treatment Methods Odor Treatments are used either to treat the odor producing compounds in the waste water or to treat the foul air. Some principle methods are:- Chemical scrubbers Activated carbon absorbers Vapour phase biological treatment Thermal process Chemical scrubbers Design objective is to provide enough contact between air, water and chemicals to enable… Read More »

Source of Odors & Strategies for Odor Management

Source of Odors & Strategies for Odor Management By Dinesh Why do we need odor management? The potential release of odors is a major concern of public acceptance. For homo-sapiens odor is primarily related to the psychological stress the odor cause. Higher concentration of odorous gases can be lethal. Projects have been rejected & some… Read More »

Shotcrete – Concrete Repairing Techniques

Shotcrete in Concrete Repair Shotcrete is defined as “mortar or concrete pneumatically projected at high speed onto a surface” (American Concrete Institute, 1990). There are two basic types of shotcrete—dry mix and wet mix. In dry mix shotcrete, the dry cement, sand, and coarse aggregate, if used, are premixed with only sufficient water to reduce dusting. This mixture is… Read More »