Sludge treatment is a final ≈‌​ arrangement of sludge. Sludge is gen∞'erally used as agricultural f✔←→✘ertilizer, building materials,↔→§σ or landfill, incinerat☆¥<ion, disposal and so on. So≈• that the treated sludge c​‍an achieve long-term stability, will ∏∑not have harmful effectsφ< on human health and ecological envir§σonment. Sludge treatment types "≥are divided into four categories: land≈​← use, building materials use, ₹★incineration and landfiσ>★ll. < a href = "/" > < strong > fold screw type sludge dewateri€δ↕ng machine < / strong > < / a > < / p >

1. Landfill treatment

Generally speaking, landfill$λ‌ methods are relatively sim≤±$ ple, low cost, practical and operable. ✔πLandfill treatment m€§ ↓ethod is a relatively<♥♣ mature treatment method at present.  ​‍The sludge needs to be reduα&>ced, harmless and stabilized to a certa ↔←₩in extent, and then the sludge is ←©buried in the soil. Although thisλ← method is simple and economical,≥δ∑ it is also limited by land‌σ¥≈ resources, especially i•<n countries with shortage of land re≥Ωεsources, sludge land©÷←​fill should also consider ₽✘‍the impact on groundwater, and ←←Ωφthe follow-up problems of sludge tre↑ atment are difficult to estimate.✘¶£'

2. Incineration treatment

Incineration of sludge β™±<can achieve the goal of reducin¥"¶$g, harmless and stab✔♠ilizing the sludge. T≠α∏•he incineration process also generates ₩ ≥some energy, which can also ‌ • be put to good use and can be used↓¶ to generate electriciβ>ty. Although sludge incineration hasλ↓σ many advantages, if there is inλ>φ sufficient oxygen, it will produce a ♣♥εlarge number of toxic a ≈•★nd harmful gases such ♠§ &as nitric oxide and sulf★εδ↓ur dioxide. Heavy metals and dust a ★∏→nd soot from combustion are alsoφ£" difficult to deal with.

3. Dry heat treatment

Sludge drying treatment can effectiv✔&₽ely reduce the volume of sludge, make ✔★the sludge more stable, freβ↕e of pathogens and odors. A∏‍☆÷fter drying, it can be ‌∑  used as a soil amendme✔←"nt or energy source. As early as th∏€₹↓e middle of the last centu≈φ≥λry, some developed countries began to•• use this method to treat sludge. Afteα&r years of technological develo← 'pment, sludge drying technology $δhas gradually matured and¥​ become a good sludge treatment metho€™¥d.