Photodegradation is one of the advanced oxidation processes rather than other treatments and it is most effective for the removal of organic pollutants. ZnO is an excellent photocatalytic oxidation material. In the present study nanosized ZnO has prepared by coprecipitation technique under different experimental conditions and employed in the removal of dyes colour.

The photocatalytic decolourisation and degradation of an azo dye acid red 73 (AR 73) in aqueous solution with TiO2 as photocatalyst in slurry form have been investigated using solar light.

Heavy metals are often present in water and wastewater as contaminants. From the public health and environmental protection point of view, it is important that their concentration should be within the permissible limit. Many technologies for heavy metals removal have been evolved, like ion exchange, chemical percipitation and reverse osmosis which are often expensive.

JAMMU: J&K State Pollution Control Board (JKSPCB) today organised a public hearing at Phase II, IGC Samba near the project site in village Madhera in connection with setting up of an integrated common hazardous waste treatment, storage, disposal and recycling facility.

Regional Director, SPCB, Shoket Choudhary while speaking, highlighted the utility of the project and stressed upon the urgent need for treatment, storage, disposal and recycling of industrial hazardous waste, bio-medical and e-waste on scientific lines in accordance with Hazardous Waste Rules, 2008 under the provisions of Environment (Protection) Act, 1986.

PCB claims ‘zero’ discharge from factories

SAMBA: Eight buffaloes were killed while four others fell ill after they consumed poisonous water from a nallah coming from SIDCO Industrial complex Samba to Basantar river this afternoon. The members of the Gujjar community whose cattle were grazing near river Basantar came to know about the matter and rushed there. They found six animals dead and about half a dozen others writhing in pain on the ground. They lodged their strong protest and alleged that their cattle died after they drank polluted poisonous water coming from about twenty factories located in SIDCO complex Samba.

Four effluent treatment plants have been approved in the current budget to treat effluent of the industrial areas of Karachi and Hyderabad, said Sindh Industries Minister Abdur Rauf Siddiqui.

The Thai International textile manufacturing plant in Perunurai, discharges significant volume of wastewater each day. The pH level must be controlled to meet requirements for safe discharge. This modern textile dye facility processes cotton fabric using color dye stuffs and proprietary chemicals.

The ammonium mix process is sustainable because it converts municipal solids into a product that fertilizes crops.

The meat processing industry is entering uncharted waters as governments worldwide introduce carbon pricing regimes and expand community awareness about which industries are posing environmental challenges in terms of air and water purity. Meat processing - including cattle, sheep, pig and poultry plants will attract attention as we move further into the current decade, both in terms of its energy use to produce steam and hot water, for example, and for quality of its wastewater and its emissions to air.

This review presents biological treatment methods for petroleum refinery wastewater, their applications, advantages and disadvantages. It covers refinery wastewater characteristics, different categories of biological treatment systems (suspended, attached and hybrid growths) and comparison between each system with conventional activated sludge process.