|

The development history of multi-disc sludge dewatering machine equipment

Byiepp

Multi-disc sludge dewatering machine, referred to as screw stacking machine, is a water treatment system widely used in municipal sewage treatment projects and petrochemical, light industry, chemical fiber, papermaking, pharmaceutical, leather and other industrial industries.　　Filtration equipment first appeared during the European Industrial Revolution in the 19th century. The earliest industrial filtration equipment that came out…

|

What is sludge dewatering and what is it used for?

Byiepp

In fact, filter presses produce excellent cake dryness and, in many cases, higher cake dryness compared to other filtration equipment. What is “silt”?Simply put, “sludge” is a semi-solid slurry that can be produced from a variety of industrial and municipal processes.The purpose of sludge dewatering is to reliably and efficiently concentrate waste into a filter…

|

Jar test procedure for precipitants, coagulants, & flocculants

Byiepp

Precipitation is the chemical conversion of soluble substances (including metals) into insoluble particles. Coagulation and flocculation causes a chemical reaction that promotes the formation, agglomeration or clumping of such particles to facilitate their removal from solution.　　The amount or dosage of a precipitant, coagulant and/or flocculant required to precipitate and remove metals in wastewater solutions is…

|

Wastewater Treatment Using Dissolved Air Flotation Process

Byiepp

Dissolved air flotation (DAF) is an effective way of treating wastewater treatment. It is important to know how water is treated because everyone uses water. This knowledge helps you understand how the water that you use is cleaned. 　Process　　DAF process is achieved by removing solid suspensions from the wastewater using air. Air is dissolved into…

|

Comparison of four air flotation equipment

Byiepp

Air flotation methods can be divided into diffuse air flotation, dissolved air flotation (including vacuum air flotation) and electrolytic air flotation. It is currently used in water supply, industrial wastewater and urban sewage treatment. Compared with other solid-liquid separation equipment, air flotation equipment has the characteristics of less investment, minimal floor space, high degree of…

|

What are biosolids?

Byiepp

Biosolids are the concentrated, stabilised solids product generated from the treatment of sewage sludge.　　During wastewater treatment, the liquids are separated from the solids. Those solids are then treated physically and chemically to produce a semisolid, nutrient-rich product known as ‘biosolids’.　　The terms ‘biosolids’ and ‘sewage sludge’ are often used interchangeably. However, biosolids are usually considered to…

|

Sludge treatment theory

Byiepp

Sedimentation and filtration Two key aspects of sludge solid−liquid separation processes for which fundamental theoretical representations exist are gravitation (or ‘sedimentation’) and filtration. These expressions can be used to inform the extent of separation of solids from the liquid and/or the energy required for certain thickening or dewatering processes. 　　Sedimentation is the separation of particles…

|

What is sludge treatment?

Byiepp

Overview of sludge processingSludge is the main waste stream generated from water purification, both water for drinking and wastewater for environmental discharge. It requires processing to reduce: i. its volume, and so the cost of subsequent haulage and disposal,ii. the risk it poses to public health, primarily from the pathogenic micro-organism content,iii. its odour,iv. its…

|

Industrial wastewater jar testing in 9 steps

Byiepp

Coagulant Jar testing on your wastewater is a useful method in determining the correct product to fit your company needs. By jar testing on a sample of wastewater generated from your production line, significant benefits emerge such as product compatibility and validation, correct chemical dose and injection rate, and projected use-cost. Below we lay out…

|

What is sludge?

Byiepp

Overview of sludge characteristics　　Sludge characteristics depend on both the original feedwater quality and the type of the unit operation from which the sludge is discharged.　　For conventional municipal wastewater treatment, the two main sludge streams are:　　from the primary sedimentation stage, producing primary sludge, and　　the secondary biological treatment stage, producing waste activated sludge (WAS) if the biological…